29 Feb '12, 3am

Will Envia Be the Envy of Lithium-Ion Car Battery Makers?

Envia Systems, the Bay Area startup with a name well crafted to inspire jealousy, succeeded in doing just that with its claim, yesterday, that it has developed a lithium-ion battery with an energy density of 400 KW/KG and an ability to deliver energy at a cost of $125 per kilowatthour. If that boast is validated, which the company says GM is in the process of doing, the battery's energy density is two or three times better than what is othrwise available now and its cost perhaps half of the usual. At the very least, Envia's achievement ought to give lithium ion batteries developed for hybrid and electric cars a new lease on life , as the San Jose Mercury News observed in a report. Nevertheless, the company's claims and their implied implications ought to be treated with some caution. Though Envia has had the support of ARPA-E and the U.S. Advanced Battery Consortium, and t...

Full article: http://spectrum.ieee.org/energywise/green-tech/advanced-c...

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