Betavoltaic Nuclear Battery Developed for Automotive applications

Scientists and technology companies are constantly seeking ways to improve battery life and efficiency. Now, for the first time using a water-based solution, researchers at the University of Missouri have created a long-lasting and more efficient nuclear battery that could be used for many applications such as a reliable energy source in automobiles and also in complicated applications such as space flight.

“Betavoltaics, a battery technology that generates power from radiation, has been studied as an energy source since the 1950s,” said Jae W. Kwon, an associate professor of electrical and computer engineering and nuclear engineering in the College of Engineering at MU. “Controlled nuclear technologies are not inherently dangerous. We already have many commercial uses of nuclear technologies in our lives including fire detectors in bedrooms and emergency exit signs in buildings.”

The battery uses a radioactive isotope called strontium-90 that boosts electrochemcial energy in a water-based solution. A nanostructured titanium dioxide electrode (the common element found in sunscreens and UV blockers) with a platinum coating collects and effectively converts energy into electrons.

“Water acts as a buffer and surface plasmons created in the device turned out to be very useful in increasing its efficiency,” Kwon said. “The ionic solution is not easily frozen at very low temperatures and could work in a wide variety of applications including car batteries and, if packaged properly, perhaps spacecraft.”

The research, “Plasmon-assisted radiolytic energy conversion in aqueous solutions,” was conducted by Kwon’s research group at MU, and was published in Nature.

Blog, Updated at: 8:25 PM

Nissan may source cheaper batteries from LG Chem

Nissan boss Carlos Ghosn is preparing to cut battery manufacturing, people familiar with the matter said, in a new reversal on electric cars that has reopened deep divisions with alliance partner Renault.

The plan, which faces stiff resistance within the Japanese carmaker, would see U.S. and British production phased out and a reduced output of next-generation batteries concentrated at its domestic plant, two alliance sources told Reuters.

In what may also prove a politically sensitive blow to Japan Inc., Nissan would follow Renault by taking cheaper batteries from South Korea's LG Chem for some future vehicles, including models made in China.

"We set out to be a leader in battery manufacturing but it turned out to be less competitive than we'd wanted," said one executive on condition of anonymity. "We're still between six months and a year behind LG in price-performance terms."

A decision on the Nissan battery plants in Sunderland, England, and Smyrna, Tennessee, is due next month, the sources said, following a tense procurement review with 43.4 percent shareholder Renault, the smaller but senior partner in their 15-year-old alliance.

"Renault would clearly prefer to go further down the LG sourcing route, and the Nissan engineers would obviously prefer to stay in-house," another insider said. "The write-off costs are potentially huge."

Renault-Nissan "remains 100-percent committed to its industry-leading electric vehicle programme" and has no plans to write down battery investments, spokeswoman Rachel Konrad said.

"We have not taken any decision whatsoever to modify battery sourcing allocation," Konrad said, adding that the alliance "does not confirm or deny procurement reviews."

But Nissan is already negotiating with manufacturing partner NEC Corp. on the shift to dual sourcing, with Chief Executive Ghosn's backing, the sources said. Nissan currently makes all its own electric car batteries.

One option being explored would see LG, which supplies some Renault models, invest in its own battery production at one of the overseas Nissan plants as the carmaker halts operations at the sites.

The alliance is also in talks with LG on a deal to supply batteries for future Renault and Nissan electric models in China, one of the sources added.

NEC and LG declined to comment.

Under Ghosn, who heads both companies, Renault-Nissan bet more on electric cars than any mainstream competitor, pledging in 2009 to invest 4 billion euros ($5.2 billion) to build models including the Nissan Leaf compact and as many as 500,000 batteries per year to power them.

Nissan and NEC invested 23 billion yen ($215 million) in their Zama, Japan battery plant and electrode manufacturing, backed by government aid. U.S. and British taxpayers also helped with the $1 billion invested in Tennessee and 210 million pounds ($341 million) in Sunderland.

The alliance has begun a belated push into faster-selling hybrids, combining electric and combustion-engine propulsion. Upscale electric rivals such as Tesla's Model S meanwhile hog the limelight, backed by big investments in newer, cheaper battery technologies.

INTERNAL RIVALRIES

Ghosn dropped extra battery sites planned for both alliance carmakers, leaving Nissan with the entire production capacity of 220,000 power packs through the NEC joint venture, AESC.

But that still far exceeds the 67,000 electric cars Renault-Nissan sold last year, and even the 176,000 registered to date. A pledge to reach 1.5 million by 2016 has been scrapped.

The coming hybrids will fill some of the excess plant capacity, although they use fewer power cells per vehicle. An all-electric Tesla rival is still planned for Nissan's premium Infiniti brand in 2018 with batteries as big as 60 kilowatt-hours (kWh), more than twice the energy capacity of the Leaf, which is due for replacement the previous year.

Nissan is seeking to unwind a ruinous NEC contract that requires it to purchase electrodes for the full capacity of 220,000 Leaf-sized 24 kWh batteries regardless of actual sales, sources said. The joint venture partner's consent is also needed to bring LG production or other activities onto the Tennessee or Sunderland sites, which together employ 500 workers.

The financial hit for Nissan "will depend on what else we can do with the plants", with heavy charges likely if both are closed, one manager added.

The Nissan procurement shift could still be thwarted by capacity-cutting costs including repayment of U.S. and British government support. Next-generation battery manufacturing at Zama would also likely need fresh Japanese aid to compete with LG and its subsidies from Seoul, sources said.

Navigating the battery backtrack is a key test for CEO Ghosn as he demands closer Renault-Nissan integration from executives mandated to pursue savings across the alliance.

For Nissan, the plant cuts would be a partial retreat from the automotive battery market - expected to top $20 billion by 2020 - just as California-based Tesla builds its $5 billion "Gigafactory" with Panasonic in Nevada.

Japanese engineers are still smarting from Renault's 2010 move to drop Nissan batteries and purchase LG for its flagship Zoe model, worsening the overcapacity problem.

"It was a 15-20 percent cost gap," said one of the people involved in the Renault decision. "In purchasing, 3-4 percent is usually enough to choose a partner for."

Today's Nissan batteries come in at $270 per kWh, based on replacement prices thought to be below cost, according to consulting firm AlixPartners. The true manufacturing cost is believed to be over $300, inflated by the amortisation of unused plant capacity and the burdensome electrodes deal.

The next generation will have lithium nickel manganese cobalt oxide (NMC) cathodes, as used by LG, rather than the current lithium manganese oxide (LMO) chemistry. The alliance cost target is $200/kWh, whether made or bought, sources said.

With a clean slate and sufficient volume, Nissan engineers insist, their next generation of batteries could be competitive on price as well as keeping crucial know-how at the company.

"When you're developing cutting-edge technology, the best way to know about that technology is to build it in-house," said one. "That's what Tesla is doing."

Many of the past missteps can be traced to internal rivalries of the kind Ghosn is only now moving to stamp out.

Former Nissan second-in-command Carlos Tavares, racing to beat the Renault Zoe to market, cut Leaf development by a year and skipped a critical battery redesign, according to alliance veterans. Nissan later cut prices, settled a class action and offered retroactive warranties to answer customer concerns about battery deterioration. Tavares now heads PSA Peugeot Citroen.

His Renault archrival at the time, Patrick Pelata, signed a confidentiality deal with LG that meant Nissan battery engineers never even knew what they were up against.

Against that backdrop, the atmosphere may be charged when Nissan engineering boss Hideyuki Sakamoto puts final arguments against the outsourcing plan in a presentation to Ghosn as soon as this week.

But the CEO's mind may be all but made up.

"We're in the process of opening up battery sourcing to a range of suppliers," Ghosn said last week when asked whether Renault could buy batteries from France's Bolloré.

In future some batteries will likely be outsourced "within the framework of alliance procurement", he added. "What's important to us is that electric car performance fully meets customer expectations."

Blog, Updated at: 2:49 AM

Kia pushes energy-density frontier with Soul EV battery [VIDEO]

Kia Motors is using a 360-V lithium-ion battery pack of “class-leading” energy density (200 W·h/kg) in the 2015 Soul EV to give it range of about 200 km (125 mi) on the European Driving Cycle, and “real-world” range of 80-100 mi (129-161 km) in the U.S. The cells and the battery are the same in all regions.

The battery in the 2015 Kia Soul EV is the result of a three-year development program with lithium-ion cell maker SK Innovation. The 192 cells are packaged into eight modules and deliver a total battery capacity of 27 kW·h. The cell cathode is of nickel-rich NCM (nickel-cobalt-manganese) chemistry, with the raw materials for that and other components optimized for energy density, durability, and safety.

Kia says high-performance anode and gel electrolyte additive materials were developed. The new electrolyte additive allows for better range by more effectively dealing with low and high temperatures. A “special” ceramic separator with improved thermal resistance properties is used.

The cell casings are of polymer pouch type (as opposed to metal), and the battery pack is air-cooled. Standard equipment on the Soul EV includes receptacles for SAE J1772 Level 1 and Level 2 ac charging, as well as CHAdeMO dc fast charging (480 V).

The car goes on sale in the U.S. in third quarter 2014.

Blog, Updated at: 11:15 PM

Tesla to Roll Out “Destination Charging” Program At Hotels, Restaurants And Resorts

Tesla has begun installing high-power wall chargers at restaurants, hotels, beach parking and other locations that can send 80 amps of electricity into the Model S and add 58 miles of range in an hour. While that’s not nearly as fast as a Supercharger, which can recharge the 85 kWh pack in around 30 minutes, it’s twice as fast as the standard 240-volt chargers that can be more commonly be found around in parking lots and garages.

Tesla has been rolling these out quickly across the US as a convenience to customers. The company says 106 of them have been installed since the program began this spring, with more coming online daily. Like the Superchargers, they are free to use for Tesla owners.

Unlike Superchargers, which function more like a petrol station, these wall chargers are designed for destinations. Teslas can also use standard charging stations with the use of an adapter that comes with the car but due to the out-sized capacity of the battery in a Model S (up to 85 kWh), a full charge from a standard 240v 10 amp outlet might take as long as 30 hours. To make utilizing the full range of a Model S practical, for example for weekend trips, higher powered 'destination' charging is required to provide up to 500 km worth of charge in approx 4-5 hours.

Blog, Updated at: 12:33 AM

Next Generation Nissan Leaf to get 300 km range and new look

The next-generation Nissan Leaf will boast a more conventional hatchback look and an improved 300 km driving range, according to a report from Auto Express.

Nissan bosses are promising new battery technology is on the way, with better energy density for a more usable pure electric vehicle. A figure of about 186 miles (300 kilometres) is likely to be the target.

There’s a good chance Nissan will offer smaller battery packs with less range, like Tesla does with its 60kWh and 85kWh packs. The new battery technology and motor will be shared with Nissan’s luxury brand, Infiniti, too.

Source: AutoExpress

Blog, Updated at: 5:24 PM

Ultracapacitors to be used for braking energy recuperation in Spanish rail system

Maxwell Technologies, Inc has announced that Win Inertia, an engineering firm specializing in power electronics, energy storage and control and communication systems, is using its ultracapacitors for a stationary wayside braking energy recuperation system at an electric rail system in Cerro Negro, Spain. Win Inertia designed and installed the system under a contract with the Spanish government's Administrator of Railway Infrastructures (ADIF). In this installation, the system also enables ADIF to store excess energy in a battery bank that supplies an electric vehicle (EV) charging station located at the rail station. The facility also seamlessly integrated a photovoltaic (PV) generator to supply additional energy if required.

The recuperation system employs Win Inertia's SHAD® hybrid control technology (international patent pending) to integrate batteries and Maxwell ultracapacitors to increase energy recovery efficiency and reduce stress on the batteries, thereby extending battery life. Ultracapacitors' rapid charge/discharge characteristics uniquely enable them to capture and store more energy during each braking event than battery-based systems, which have limited ability to absorb energy in the few seconds required to stop a vehicle. Win Inertia's high-efficiency hybrid energy storage and power delivery system furthers ADIF's return on investment as it enables dual use of the recuperated energy for rail vehicle propulsion and EV charging. By converting kinetic energy into stored electric energy through regenerative braking, the system recovers 8 to 10 percent of the total energy used by the railway system, which is then used to power the EV charging station.

"By incorporating ultracapacitors, which accept charge from the braking energy recuperation system much more efficiently than batteries, the system recovers significantly more energy," said Eugenio DomĂ­nguez Amarillo, Win Inertia's CEO and chief technology officer. "Additionally, by using ultracapacitors to relieve the batteries of the stress of repetitive cycling, we expect to extend battery life by 20 to 25 percent."

Braking energy recuperation systems in electric and hybrid rail vehicles save fuel and electrical energy by using resistance from the electric motor to stop the vehicle, and, through that process, converting kinetic energy that would be wasted in a conventional friction-based braking system into stored electrical energy. Ultracapacitors' high reliability and extremely long operational life also make them a preferred option for heavy cycling electric utility grid applications.

Dr. Franz Fink, Maxwell's president and CEO, said, "Transportation is the world's largest energy consumer, so systems that enhance energy efficiency and reduce fossil fuel consumption and emissions can play a transformational role in energy management and create tremendous long-term growth opportunities for rapidly advancing ultracapacitor technology."

Unlike batteries, which produce and store energy by means of a chemical reaction, ultracapacitors store energy in an electric field. This electrostatic energy storage mechanism enables ultracapacitors to charge and discharge in as little as fractions of a second, perform normally over a broad temperature range (-40°C to +65°C), operate reliably through one million or more charge/discharge cycles and resist shock and vibration. Maxwell offers ultracapacitor cells ranging in capacitance from one to 3,000 farads and multi-cell modules ranging from 16 to 160 volts.

Blog, Updated at: 7:39 PM

LG Chem wins battery order from Audi for plug-in hybrid cars [VIDEO]

South Korea's LG Chem said on Wednesday it had won an order from Audi to supply batteries for its plug-in hybrid and micro hybrid electric vehicles.

LG Chem said the deal was "worth hundreds of millions of dollars" but declined to give further details. It said it expected to win more such orders from Audi parent Volkswagen in the future.

LG Chem, which has secured a total of 20 customers including General Motors, also it aims to achieve combined sales of over $10 billion from large-sized batteries by 2018.

Blog, Updated at: 4:59 AM

LG Chem signs battery deal with Volkswagen [VIDEO]

LG Chem has agreed to supply electric-vehicle batteries to Volkswagen, a company executive said Tuesday.

"Volkswagen has designated LG Chem as one of its key battery-sourcing channels to push its electric car projects," the executive said by telephone on condition of anonymity, citing the sensitivity of the issue. "LG is going to supply battery packs and solutions to the German carmaker."

The deal with Volkswagen is not as big as similar deals between LG and other leading carmakers such as General Motors and Ford, said the executive.

The partnership also involves collaboration on various products the German car manufacturer is working to develop as part of its electric-vehicle projects, part of its efforts to reduce carbon emissions.

For example, Volkswagen is working to attain "ultra-low-carbon mobility" for its new eGolf electric vehicle, said officials.

The vehicle is a fully electric version of Volkswagen's popular Golf.

"LG Chem will join futuristic electric car business projects such as [projects to develop] plug-in hybrid electric vehicles led by the German carmaker thanks to the latest battery deal," said the official.

An LG Chem spokesman declined to confirm.

LG Chem has been in talks with Volkswagen over the past four years regarding a business partnership involving batteries for electric vehicles.

The executive said it was Beijing's approval to proceed with LG's plans to build a battery joint venture in China that helped the LG Group affiliate land the partnership with Volkswagen.

Volkswagen plans to spend more than $2 billion on models and on two new facilities in China, increasing total investments in the world's biggest auto market to nearly $8 billion.

LG Chem Chief Financial Officer Cho Suk-jeh told investors and analysts that the company aimed to generate nearly 2 trillion won in revenue from its large battery business, including energy systems, by 2016.

The petrochemical business is the biggest cash cow for LG Chem, accounting for 77 percent of its 5.87 trillion won in sales in the second quarter. Batteries accounted for 12.3 percent and electronic information materials 12.1 percent.

LG Chem is gradually cutting its reliance on petrochemical products as part of an effort to diversify its revenue sources.

On a related note, in 2016 the company plans to begin providing carmakers with batteries capable of powering electric vehicles for at least 200 miles (322 kilometers).

LG Chem currently supplies lithium-ion batteries to General Motors, Ford, Hyundai-Kia, Renault, Volvo, and other carmakers. The 200-mile-plus range of the new batteries is roughly double that of the company's current, first-generation electric-vehicle batteries.

Blog, Updated at: 2:39 AM

New Rechargeable Cell Has 7x Higher Energy Density Than Li-ion Cells

A Japanese research group developed a rechargeable battery based on a new principle in cooperation with Nippon Shokubai Co Ltd.

The group is led by Noritaka Mizuno, professor at the School of Engineering, the University of Tokyo. The new battery uses the oxidation-reduction reaction between oxide ions and peroxide ions at the positive electrode. The group proved that peroxides are generated and dispersed due to charge and discharge reactions by using a material made by adding cobalt (Co) to the crystal structure of lithium oxide (Li2O) for the positive electrode, verifying a battery system based on a new principle.

The new technology can realize an energy density seven times higher than that of existing lithium (Li)-ion rechargeable batteries, increase capacity, lower price and enhance safety. It is expected to be used for batteries for electric vehicles (EVs) and next-generation stationary batteries.

The oxidation-reduction reaction between Li2O and Li2O2 (lithium peroxide) and oxidation-reduction reaction of metal Li are used at the positive and negative electrodes, respectively, of the new battery. The battery has a theoretical capacity of 897mAh per 1g of the positive/negative electrode active material, voltage of 2.87V and theoretical energy density of 2,570Wh/kg.

At that time, the energy density is 370Wh per 1kg of the positive/negative electrode active material, which is about seven times higher than that of existing Li-ion rechargeable batteries using LiCoO2 positive electrodes and graphite negative electrodes. The theoretical energy density of the new battery is lower than that of lithium-air batteries (3,460Wh/kg). But it has a sealed structure like conventional Li-ion batteries, realizing a high reliability and safety.

This time, as the positive electrode material, the research group used a material made by using a planetary ball mill to add Co to the crystal structure of LiO2. And the group proved that it is possible to realize a battery system in which the oxidation-reduction reaction between oxides and peroxides reversibly proceeds. And it proved that (1) peroxides are generated in the positive electrode for charge, (2) the peroxides are dispersed for discharge and (3) those reactions are repeated, by quantitatively analyzing the peroxides.

The group also proved that neither O2 nor CO2 is generated in the range where it is possible to reversibly charge/discharge the battery.

The positive electrode used in the demonstration test enables to repeatedly charge/discharge the battery with a capacity of 200mAh/g and to quickly charge/discharge the battery with a large current. The positive electrode has a smaller mass ratio of Co than LiCoO2, which is used for existing Li-ion batteries, and possibly lowers costs.

Blog, Updated at: 6:28 AM

Tesla Gigafactory deal confirmed - Panasonic to invest up to $1Billion

Panasonic has reached a basic agreement with Tesla Motors to participate in the Gigafactory, the huge battery plant that the American electric vehicle manufacturer plans to build in the U.S.

Tesla aims to begin the first phase of construction this fiscal year. The plant would start making lithium-ion cells for Tesla cars in 2017. The automaker is shouldering the cost for the land and buildings.

Panasonic likely will invest 20 billion to 30 billion yen ($194-291 million) initially, taking responsibility for equipping the factory with the machinery to make the battery cells. An official announcement on the partnership will come by the end of this month.

Capacity at the Gigafactory will be added in stages to match demand, with the goal of producing enough battery cells in 2020 to equip 500,000 electric vehicles a year.

The total investment is expected to reach up to $5 billion, and Panasonic's share could reach $1 billion.

The Japanese company owns a stake in Tesla and currently makes the batteries for Tesla cars. In a contract reworked in October 2013, the two agreed that Panasonic would supply Tesla with 2 billion battery cells between 2014 and 2017.

Blog, Updated at: 1:23 AM

Panasonic to invest $200-300 million in Tesla battery plant

Panasonic Corp plans to initially invest about 20 billion to 30 billion yen ($200-300 million) in Tesla Motors Inc's planned lithium-ion battery plant in the United States, a person familiar with the matter said on Tuesday.

The Japanese company, which already supplies batteries for the electric vehicle maker, will ultimately invest about $1 billion in the planned $5 billion battery "Gigafactory", the person said.

The figures for Panasonic's investments were first reported by the Nikkei business daily earlier on Tuesday.

A Panasonic spokesman declined to confirm the investment figures, saying that while the company has signed a letter of intent to participate in the Tesla battery project and was in talks on the matter, no concrete decisions had been made.

A basic agreement on cooperation on the project between the two companies is due to be announced by the end of this week, with both due to report quarterly earnings results on Thursday, although no investment figures will be disclosed, the person said.

A Tesla spokesman, asked about the Nikkei report, declined to comment on "speculation regarding Panasonic".

Tesla is looking at three sites in the United States to build the Gigafactory plants which by 2020 would be able to make more lithium-ion batteries in a year than were produced worldwide in 2013.

Panasonic said in May it wanted to be the sole battery cell maker at the battery facility.

Blog, Updated at: 7:29 AM

GM and LG working on Tesla Model 3 competitor with 200 mile range

LG Chem CFO Cho Suk-jeh has revealed the company will supply an automaker with a battery that will allow one of their models to travel more than 200 miles (320 km) on a single charge. Suk-jeh declined to say which automaker will use the battery but all indications are pointing to General Motors.

General Motors executives have said that the automaker is working on an EV that will deliver at least 200 miles of range. The automaker, manufacturer of the Chevrolet Volt, has said it hopes to have the longer-range EV in the market in 2016 to compete with the anticipated Tesla Model III, now scheduled for introduction in late 2016 or early 2017.

LG Chem presently supplies lithium-ion batteries to GM, Ford, Hyundai, Kia, Volvo and Renault, among others.

Doug Parks, GM’s vice president for product development, said in an interview last year that General Motors plans to offer an EV with at least 200 miles of range for a price of around $30,000. That's the target all the major automakers are aiming at for their next-generation electric vehicles, he said.

GM invested $7 million in Battery Start-up Envia Systems in 2011. Unfortunatley the promised 'world record' 400 Watt-­‐ hours/kilogram (Wh/kg) energy density only lasted a few cycles leaving GM to search for more legitimate battery technology partners.

General Motors and LG Group agreed in 2011 to jointly design and engineer future electric vehicles, expanding a relationship built on LG’s work as the battery cell supplier for the Chevrolet Volt and Opel Ampera extended-range EVs.

Blog, Updated at: 6:48 PM

LG Chem targets EV batteries with range of more than 200 miles in 2016

South Korean supplier LG Chem plans to supply batteries for electric vehicles that can travel more than 200 miles, or 321 kilometers, per charge in 2016, its CFO said on Friday.

The CFO, Cho Suk-jeh, did not elaborate on which automakers will use the so-called second-generation batteries.

LG Chem currently supplies batteries for General Motors, Renault SA and other automakers.

GM's former CEO, Dan Akerson, said last year the U.S. automaker, which currently sells the Chevrolet Volt and Cadillac ELR hybrids, was working on new electric vehicles, including one with a 200-mile driving range.

Blog, Updated at: 8:14 PM

Redox Ultrabattery achieves high energy and power capacity

Researchers have tested a unique combination of hybrid supercapacitor-battery materials that combines fast electrochemical charge times with the high energy density of a li-ion battery.

Li-ion batteries with high specific energy, high power density, long cycle life and low cost are critical for widespread adoption of electric vehicles. A key bottleneck in achieving this goal is the limited fast charging ability of Li-ion Batteries. Rapid charging causes accelerated degradation of the battery as well as a potential fire hazard due to local over-potential build-up and increased heat generation. Li-ion Batteries have the highest energy density but typically suffer from low power density.

On the other extreme, electrochemical double-layer supercapacitors, which store energy through accumulation of ions on the electrode surface, have low energy storage capacity but very high power density.

A special category of electrochemical capacitors is provided by redox capacitors. Here, charge is stored through surface or bulk (pseudocapacitive) redox reactions, similar to Li-ion Batteries, yet, with a very fast charge transfer response, similar to electrochemical double-layer capacitors. Although excellent capacity retention for extended cycling can be obtained even at high charge - discharge rates, specific capacity of redox capacitors is typically lower than for Li-ion batteries.

The most intuitive approach to combine high energy and high power density within a single device is to combine the different types of energy storage sources. So far, mainly hybridization between electrochemical double-layer capacitors and Li-ion batteries has been explored. The primary drawback of this approach is that power and energy performances are decoupled. At high current densities, the response is dominated by the electrochemical double-layer capacitor component, considerably diminishing the energy density of the hybrid device.

Researchers have now shown that enhanced battery-capacitor hybrids can be constructed by careful choice of the super-capacitor and battery components. They combined a lithium iron phosphate (LiFePO4) battery material with poly (PTMA) redox capacitor. The PTMA and LiFePO4 hybrid ultra-battery gives best-of-both-worlds performance characteristics: high energy and power capacity as well as fast and stable recharge for more than 1,500 cycles.

In addition to improved cycling and rate performances, the hybrid electrode features a unique fast charge storage mechanism. When a charge current is applied on the hybrid electrode, the polarization of PTMA and LiFePO4 overlap above the equilibrium values and both components are charged (or, oxidized). However, the faster redox kinetics of PTMA results in excess charging of the PTMA component.

When the current supply is stopped, the potential of both components in the electrode tends to reach their equilibrium open circuit potential. However, the electrochemical potential of the PTMA is higher than that of LiFePO4. According to the first law of thermodynamics the overall state-of-charge (SOC) of the electrode will remain unchanged, mainly the PTMA/LiFePO4 charged species ratio will change.

The hybridization of the two separate components yields a remarkable set of properties. The appropriate redox couples, flat-potential profile and elevated specific capacity yet, different redox kinetics for PTMA and LiFePO4, offer a hybrid battery electrode where the fast electrochemical response of PTMA delays the voltage rise during the charge process. This implies significant improvements for the rate performance, cycle lifetime and safety of lithium-ion batteries during rapid recharge.

This novel approach paves the way to new design rules for Li-ion battery electrodes and may prove pivotal in pushing the performance envelope of Li-ion batteries towards the goal of increasing adoption of electric vehicles.

Source: Nature

Blog, Updated at: 11:11 PM

Panasonic to build gigafactory, produce batteries for Tesla Motors

Japanese electronics giant Panasonic is teaming with Tesla Motors to build batteries for the American electric car manufacturer.

Panasonic is expected to sign a contract this month to help Tesla construct a plant and produce batteries for its vehicles.

Initial operations at the plant are scheduled to commence in 2017 and become fully operational by 2020. The facility will produce batteries for 500,000 vehicles annually.

The American company had been seeking partners for the venture and plans to invest up to $5 billion in the joint project. Panasonic is to be the core participant, likely investing more than 200 million dollars.

Tesla will invest $2 billion in the factory, while the construction will require $4–$5 billion. The rest of the fund will be provided by Tesla’s partners. Tesla is considering other potential investors, such as suppliers of raw materials for the investment.

Panasonic and Tesla signed a deal in Oct 2013, under which Panasonic will increase the supply of battery cells to 2 billion in the 4-year timeframe till 2017. Panasonic has supplied 200 million cells to Tesla in the last 2 years.

In addition, Panasonic doubled its investment for auto batteries to $275 million this year. Panasonic will utilize this additional investment to boost the domestic production of the small lithium-ion batteries for Tesla.

The collaboration ultimately boosted the earnings of Panasonic's lithium-ion battery section into the black for fiscal 2013.

Tesla Motors anticipates selling 35,000 Model S vehicles this year, a 55 percent increase from 2013. The company is also planning to release the Model X, an SUV type electric vehicle, in 2015. The new factory is expected to ultimately boost the number of batteries sold to Tesla Motors.

Panasonic is seeking to increase sales in its EV battery cell sector to 4.5 billion dollars in fiscal 2018. That goal would be a 3.5-fold increase from fiscal 2012.

The company is expanding its battery operations in the hopes of establishing it as a core business. Panasonic's household electronics business previously held that position, but sales have stagnated in recent years.

Blog, Updated at: 5:21 PM

Samsung SDI to Boost Supply of BMW i3 & i8 battery cells

The BMW Group and Samsung SDI plan to expand their supply relationship for battery cells for electro-mobility. The two companies signed a memorandum of understanding (MoU) to this effect today in Seoul. Samsung SDI will supply the BMW Group with battery cells for the BMW i3, BMW i8 and additional hybrid models over the coming years. The most important elements of the agreement are the increase in quantities delivered over the medium term, in response to growing demand for electro-mobility, and further technological development of battery cells.

Dr. Klaus Draeger, member of the Board of Management of BMW AG, responsible for Purchasing and Supplier Network: “Our partnership with Samsung SDI is a good example of successful Korean-German cooperation on innovative technologies. The battery is a key component in every electric vehicle – since it basically determines the range and performance capabilities of the car. In Samsung SDI, we have chosen a supplier that offers us the best-available technology with future-oriented Korean battery expertise.”

Sang-Jin Park, CEO of Samsung SDI: “I am very proud that Samsung SDI supports the success of the BMW i3 and i8. The decision taken in 2009 to choose lithium-ion battery cells from Samsung SDI for the BMW i models was the right one for both companies. Additional BMW vehicles will also be equipped with Samsung SDI’s leading lithium-ion technology. This MoU with the BMW Group demonstrates the trust in Samsung SDI’s future technology and efficient mass production capabilities. Both companies are confident that this extended partnership will secure their leadership in future technologies.”

The partnership with Samsung SDI since 2009 provides the BMW Group with access to state-of-the-art lithium-ion battery technology. Another important factor in the choice of Samsung SDI was that the company considers the suitability of lithium-ion battery cells for environmentally-friendly production and subsequent recovery of materials during product development. Complete high-voltage batteries for the BMW i3, BMW i8 and other future hybrid vehicles are built on an ultra-modern assembly line at BMW Plant Dingolfing. The only supplied parts are the cells – otherwise the high-voltage batteries are developed and produced completely in-house, building on experience with earlier batteries developed in-house for models, such as the BMW ActiveHybrid 3 and 5 and the BMW ActiveE, with further optimisation.

The extension of the collaboration with Samsung SDI underscores the BMW Group’s strategy of further electrification. Continuation of the partnership also confirms the success of BMW i. Customer demand for the BMW i3 remains high. In addition, in the first half of 2014 the BMW Group has already sold around 5,400 BMW i3 cars.

Deliveries of the BMW i8 got underway in the main international markets in June. Demand is already significantly higher than the planned production volume for the ramp-up phase.

South Korea is also an important supplier market for the BMW Group, beyond the partnership with Samsung SDI. For this reason, the company opened a local purchasing office in 2009. In 2014, the purchasing volume in this market will exceed 300 million euros – a significant increase over the previous year, with sourcing volumes continuing to climb over the coming years. The BMW Group relies on a total of 20 South Korean suppliers. South Korea will be one of the key purchasing markets for the BMW Group in the future, especially for innovative IT technologies.

The BMW Group has operated its own subsidiary in South Korea since 1995. This commitment was expanded in 1998 with the opening of a logistics and training centre. BMW Financial Services has also been active in South Korea since 2001. On 14 July 2014, the BMW Group opened its only combined brand and driving experience centre worldwide currently, in the vicinity of Seoul airport. In 2013, the BMW Group was market leader in South Korea’s premium segment for the sixth consecutive year, with the sale of 39,367 BMW and MINI vehicles – an increase of 13.4% from 2012. A total of 1,328 BMW motorcycles (+27.6%) were also delivered to customers. In the first half of 2014, sales reached 21,972 units (+19,3% compared to prev. yr.). BMW South Korea employs a total workforce of 230 people.

Blog, Updated at: 3:48 AM

Sand-based lithium ion battery improves energy density 300%

Researchers at the University of California, Riverside’s Bourns College of Engineering have created a lithium ion battery that outperforms the current industry standard by three times. The key material: sand.

“This is the holy grail – a low cost, non-toxic, environmentally friendly way to produce high performance lithium ion battery anodes,” said Zachary Favors, a graduate student working with Cengiz and Mihri Ozkan, both engineering professors at UC Riverside.

The idea came to Favors six months ago. He was relaxing on the beach after surfing in San Clemente, Calif. when he picked up some sand, took a close look at it and saw it was made up primarily of quartz, or silicon dioxide.

His research is centered on building better lithium ion batteries, primarily for personal electronics and electric vehicles. He is focused on the anode, or negative side of the battery. Graphite is the current standard material for the anode, but as electronics have become more powerful graphite’s ability to be improved has been virtually tapped out.

Researchers are now focused on using silicon at the nanoscale, or billionths of a meter, level as a replacement for graphite. The problem with nanoscale silicon is that it degrades quickly and is hard to produce in large quantities.

Favors set out to solve both these problems. He researched sand to find a spot in the United States where it is found with a high percentage of quartz. That took him to the Cedar Creek Reservoir, east of Dallas, where he grew up.

Sand in hand, he came back to the lab at UC Riverside and milled it down to the nanometer scale, followed by a series of purification steps changing its color from brown to bright white, similar in color and texture to powdered sugar.

After that, he ground salt and magnesium, both very common elements found dissolved in sea water into the purified quartz. The resulting powder was then heated. With the salt acting as a heat absorber, the magnesium worked to remove the oxygen from the quartz, resulting in pure silicon.

The Ozkan team was pleased with how the process went. And they also encountered an added positive surprise. The pure nano-silicon formed in a very porous 3-D silicon sponge like consistency. That porosity has proved to be the key to improving the performance of the batteries built with the nano-silicon.

The improved performance could mean increasing the expected lifespan of silicon based electric vehicle batteries up to three times or more, which would be significant for consumers, considering replacement batteries cost thousands of dollars. The energy density is more than three times higher than that of traditional graphite based anodes, which means cell phones and tablets could last three times longer between charges.

Blog, Updated at: 5:50 PM

Molten-air battery offers up to 50x higher storage capacity than Li-ion

With support from the National Science Foundation, researchers at George Washington University, led by Stuart Licht, think they have developed a novel solution, and they're calling it the "molten air battery."

These new rechargeable batteries, which use molten electrolytes, oxygen from air, and special "multiple electron" storage electrodes, have the highest intrinsic electric energy storage capacities of any other batteries to date. Their energy density, durability and cost effectiveness give them the potential to replace conventional electric car batteries, said Licht, a professor in GWU's Columbian College of Arts and Sciences' Department of Chemistry.

The researchers started with iron, carbon or vanadium boride for their ability to transfer multiple electrons. Molten air batteries made with iron, carbon or vanadium boride can store three, four and 11 electrons per molecule respectively, giving them 20 to 50 times the storage capacity of a lithium-ion battery, which is only able to store one electron per molecule of lithium. "Molten air introduces an entirely new class of batteries," Licht said.

Other multiple-electron-per-molecule batteries the Licht group has introduced, such as the super-iron or coated vanadium boride air battery, also have high storage capacities. But they had one serious drawback: They were not rechargeable. Rechargeable molten batteries (without air), such as a molten sulfur battery, have been previously investigated, but are limited by a low storage capacity.

The new molten air batteries, by contrast, offer the best of both worlds: a combination of high storage capacity and reversibility. As the name implies, air acts as one of the battery electrodes, while simple nickel or iron electrodes can serve as the other. "Molten" refers to the electrolyte, which is mixed with reactants for iron, carbon or vanadium boride, then heated until the mixture becomes liquid. The liquid electrolyte covers the metal electrode and is also exposed to the air electrode.

The batteries are able to recharge by electrochemically reinserting a large number of electrons. The rechargeable battery uses oxygen directly from the air, not stored, to yield high battery capacity. The high activity of molten electrolytes is what allows this charging to occur, according to Licht.

The electrolytes are all melted to a liquid by temperatures between 700 and 800 degrees Celsius. This high-temperature requirement is challenging to operate inside a vehicle, but such temperatures are also reached in conventional internal combustion engines.

The researchers continue to work on their model to make the batteries viable candidates for extending electric cars' driving range. In the Licht group's latest study, the molten air battery operating temperature has been lowered to 600 degrees Celsius or less. The new class of molten-air batteries could also be used for large-scale energy storage for electric grids. "A high-temperature battery is unusual for a vehicle, but we know it has feasibility," Licht said. "It presents an interesting engineering question."

Blog, Updated at: 12:16 AM

Nissan Leaf Replacement Battery Priced @ $5,499

The Nissan Leaf has been on the market since 2010, so there’s a good chance that some of them are getting close to 60,000 miles. This is important because it’s when the 5 years/60,000 miles capacity loss warranty expires. Nissan has announced that pricing for a replacement battery start at $5,499.

As an EV battery pack is defined as 'used' once it's capacity reduces to approx 80% Nissan have developed a new business model to create a market for 'used' Leaf battery packs. The old battery must be exchanged for the new battery as a condition of the sale of the replacement battery, and Nissan’s suggested retail battery pricing reflects a $1,000 core value assigned to the battery. Nissan will ensure that the old battery is recycled and reused as part of their 4R Energy business.

Nissan and Sumitomo Corporation created the joint venture company, “4R Energy Corporation”, in September 2010, to address the secondary use of EV lithium-ion batteries. Earlier this year they launched the world’s first large-scale power storage system which utilizes used batteries collected from electric vehicles.

The used EV batteries that will be recycled into this large-scale storage system have been recovered and have gone through thorough inspection and maintenance at 4R, to confirm safety and performance. The prototype system (600kW/400kWh) consists of sixteen used EV batteries.

The $5,499 price is just for the battery, and that doesn’t include taxes or dealer installation. Owners of the 2011 and 2012 Nissan Leaf will also need to pay $225 for an installation kit that allows the newer battery design to fit into the older models.

Nissan will offer financing options to customers who need to replace their battery. Details about this financing probably won’t be finalized until closer to the end of the year, but Nissan expects to keep monthly payments close to $100 per month.

Like the batteries found in a new Nissan Leaf, the replacement batteries will carry an eight-year/100,000-mile warranty against defects and a five-year/60,000-mile against capacity loss.

To read more head on over to the My Nissan Leaf forum.

Blog, Updated at: 2:32 AM

Partnership to Develop Dual Carbon Battery for Racing [VIDEO]

Racing group Team TAISAN and materials engineer Power Japan Plus have formed a partnership to develop an electric racing vehicle, which will be the first in the world to use the Ryden dual carbon battery.

Under this partnership, Power Japan Plus will provide Ryden cells and Team TAISAN will leverage its vast experience in international racing to optimize the battery and develop a battery pack and management circuit. A go-kart powered by the Ryden dual carbon battery will begin test driving August of this year.

“We have faced a number of issues with electric vehicle batteries up until now. The Ryden battery from Power Japan Plus is the solution we have been searching for,” said Yasutsune Chiba, owner of Team TAISAN. “We will first develop a battery capable of withstanding the rigorous demands of racing, before advancing the technology for use in commercial applications."

Team TAISAN has faced many roadblocks with conventional battery technology, the danger of thermal runaway being the most prevalent. Intense heating prevented other electric vehicle (a Tesla Roadster) racing cars used by TAISAN from running continuously. In searching for a solution to this problem, Team TAISAN discovered the Ryden dual carbon battery developed by Power Japan Plus.

The Ryden dual carbon battery wields an energy density comparable to lithium-ion batteries, with a much faster charge time. In addition, Ryden is resistant to heating during operation, mitigating the threat of thermal runway and yielding a simpler battery pack cooling system.

"Team TAISAN has profound experience in automotive technology, especially with the high demand world of motorsports,” said Dou Kani, CEO and co-founder of Power Japan Plus. “I am confident that by working together with Team TAISAN, we can produce an irreplaceable electric vehicle battery unlike any ever made.”

Development will start with a go-kart powered by the Ryden dual carbon battery, which will undergo endurance testing in harsh summer heat conditions this August. The team will then build a full scale EV racing car driven by a Ryden battery pack. Team TAISAN will conduct endurance and safety tests on the electric racing vehicle at its facilities in Chiba Prefecture, Japan, with a goal for the vehicle to debut in a Japanese EV racing competition.

Established in 1983, Team TAISAN is recognized as one of Japan’s most prestigious racing teams, with a total count of 72 victories. Among these victories, Team TAISAN has won 13 Japanese national racing championships – eight during the last 20 years – at the All Japan Grand Touring Car Championship (JGTC) / Super GT (SGT). The team has also won six overseas championships, including The 24 Hours of Le Mans in the GT class in its very first attempt, going on to complete the race a total of six times. The team has also been actively involved in EV endurance racing in Japan.

Team TAISAN was an early adopter of the Tesla Roadster, champion at the 2011 ALL JAPAN EV-GP SERIES, as well as the modified EV Porsche 916 model, which completed four, one-hour endurance races hosted by the EV Club, with third place honors in the lead-based battery class.

The partnership was announced publically prior to the start of the 24 Hours of Le Mans race this past Saturday in Le Mans, France.

Blog, Updated at: 8:36 PM
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