By Paul Homewood
h/t Dave Ward
Others have already investigated the potential cobalt cliff. Now another paper comes to the same conclusions:
Electric vehicles need powerful, light and affordable batteries. The best bet is commercial lithium-ion cells — they are relatively compact and stable. But they are still too bulky and expensive for widespread use.
The performance of rechargeable lithium-ion batteries has improved steadily for two decades. The amount of energy stored in a litre-sized pack has more than tripled, from around 200 watt hours per litre (Wh l–1) to more than 700 Wh l–1. Costs have fallen by 30 times, to around US$150 per kilowatt hour (kWh). But that still exceeds the $100 per kWh goal for affordability set by the US Department of Energy. And batteries that are powerful enough for an electric car (50–100 kWh) still weigh around 600 kilograms and take up…
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