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The hidden resource constraints would be lithium at very low cost, that is a few $ per kg as lithium carbonate.

It takes about 250 g of lithium per kWh of battery capacity with current technology. We can reasonably expect that to go down to 125 g/kWh with 65 g/kWh being the ultimate physical limit on ~4V cells.

So, count about 4 kg for a 16 kWh battery like in a Chevy Volt EREV. Even at 100 x current prices for the raw LiCO3 material assuming very low grade resource, it would account for just a thousand bucks on a car or so.

by Francois in Paris on Tue May 27th, 2008 at 10:11:54 AM EST

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