The Next Challenge for Solid-State Batteries? Making Lots of Them

For decades, scientists have wondered what to do with the liquid inside a lithium-ion battery. This electrolyte is key to how batteries work, shuttling ions from one end of the cell to the other. But it’s also cumbersome, adding weight and bulk that limit how far electric vehicles can go on a charge—on top of which, it can catch fire when a battery shorts. A perfect fix would be replacing that liquid with a solid—ideally one that’s light and airy. But the trick lies in making that switch while preserving all the other qualities a battery should have. A solid-state battery not only needs to send you farther down

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