If cost was the only priority for EVs batteries, they would use lead acid batteris.
Weight and energy density are also important.
Anyway, if for example, you have a 18650 battery cell for Li-Ion battery, for 3 dollars and a X value em Wh/g, and have a 18650 battery cell of sodium, with 10 times such X value in Wh/g for 3 or even 4 dollars, you are still paying a lot less money per watt using the sodium "turbo" battery.
Weigh of batteries also increase cost of EVs, since they are forced to go with lightweight materials to compensate the battery heavy load (for actual Li-ion batteries).
Quote:
Originally Posted by redpoint5
Cost is far and away the biggest priority for battery technology with regards to EVs.
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