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Originally Posted by JohnnyB
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I hate being negative Nancy about this stuff, but Toyota has been touting their future solid state battery for many years. They've been working in solid state batteries since at least 2016. Last month they claimed 900 miles and a major reduction in emissions (how? Dunno). It first was supposed to be in production by 2021, now 2027. They're waaaay behind in the EV transition because they continued to put every egg in the hydrogen fuel cells and their board is clamoring for change to EV.
Solid state is probably the future but if I was going to put money on it I'd not have Toyota using it first and it will probably be in the 2030's. There's a bunch of companies making working solid state batteries but finding a solution that's scalable has been completely elusive. Ceramic coating with zero imperfections and one atom thick sheets of graphite aren't cheap or scalable to produce