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That's lithium metal batteries, which are not rechargeable. Most EVs use lithium-ion batteries.

Lithium-ion batteries were invented by M. Stanley Whittingham [1] and John B. Goodenough [2] who are both still alive (81 and 100 years old, respectively).

[1] https://en.wikipedia.org/wiki/M._Stanley_Whittingham

[2] https://en.wikipedia.org/wiki/John_B._Goodenough

Also: https://en.wikipedia.org/wiki/Akira_Yoshino

I assume he means one of the inventors who are not dead.

He means Goodenough

Wasn't he working on solid state batteries?

Sure but I’m not the one who made the original remark

It's just more likely to be Wittingham who is currently working on Lithium-ion batteries.

Ok fair.