Electric cars hoping for lithium ion revolution

11 Апр 2014 | Author: | Комментарии к записи Electric cars hoping for lithium ion revolution отключены
Eliica (Electric Lithium-Ion Car)

The Opel Flextreme was unveiled by CEO of GM Carl Peter

AP PHOTO/MICHAEL

But US auto giant General is betting that chemists are to solving the puzzle, by developing batteries that are safe, long-lasting, and inexpensive.GM is investing in two battery companies with technologies in the hope at least one of can power its planned Opel hybrid car, unveiled at the IAA auto show on 11 September. The is slated for a 2010 launch, with its counterpart hybrid in the US, the Volt. Joe Lograsso, manager of energy storage systems for GM, that meeting the goal be challenging, with battery development now entering a key phase. think the next 12 months be critical,’ he told Chemistry .

Many car manufacturers already hybrid electric vehicles without plug-in charging HEVs rely on their engines, and energy diverted braking, to charge nickel hydride (NiMH) batteries, are generally safe but only enough charge for very stretches of travel time.

PHEVs are likely to use lithium ion already widely used in computers and mobile telephones. are charged by using an electrical to push Li ions through an from cathode to anode, they intercalate with a material (such as graphite). is discharged through an external when the ions return to the

Yet Li-ion batteries are less and less safe than batteries, and can be prone to overheating and a risk that can increase in the higher density cells to power cars. The batteries also have a life of at 10 years, added Lograsso.

That’s where the competing developments come in. They aim to the Li-ion battery within the couple of years to power the

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Choice LiFePO4 phosphate

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First on the grid is A123Systems of Massachusetts, co-founded by MIT materials Yet-Ming Chiang. The company is cells using a proprietary for a Li-ion cell made a ‘nanophosphate’ material — of doped lithium iron (LiFePO 4 ) less than 100 in size, coated onto an electrode. Traditional Li-ion use cathodes with particle around 5 micrometres in size, Ric Fulop, co-founder and vice of business development at A123.

What’s more, the doping the material’s conductivity by several of magnitude, he added.

The A123 is carbon based, but is optimised ‘special additives’ making it from traditional graphite Fulop said. ‘A123’s offers both higher per weight/volume and better abuse — [in other words]

Eliica (Electric Lithium-Ion Car)

The company already uses the to produce 10 million cells per for smaller applications, such as tools. ‘There is a lot of engineering ahead of us. to take small into larger cells,’ Fulop. A123’s batteries ultimately be manufactured by Frankfurt, Continental Automotive Systems.

Compact competition

But GM has also has a development contract with Power, of Troy, Michigan, would produce battery from cells manufactured by its company, Korean-based LG Chem.

cathodes use lithium manganese (LiMn 2 O 4 ), a material that has been ruled out because it not survive at least the ten years of use by car manufacturers, said Mohamed Compact Power’s research ‘But using proprietary we have been able to this so that our cells on this cathode are state-of-the-art respect to performance, life and

The cathode is not the only factor performance and cost. Compact technology also uses a separator that provides from internal shorts’, Alamgir, a problem responsible for massive recalls of small Li-ion laptop batteries.

is optimistic that at least one of partners will come up a viable battery solution. But he GM is still keeping its options ‘This field is developing quickly,’ he said. ‘We are other companies develop and they are staying in the chase

Consumer demand is expected to be when automakers are finally to bring PHEVs to market. Swaminathan, team leader of the American Energy Power Group at global consulting Frost Sullivan, says battery market turnover for hybrid autos is expected to $1.5-2 billion in the next 10

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