The race to create a solid-state battery that could compete with today’s lithium-ion cells is heating up. Lithium-ion batteries are everywhere: in your phone, car, camera, and more. Since their debut in the 1990s, they’ve become a leader in energy storage. But they have one major flaw: safety. Lithium-ion batteries have a tendency to catch fire, especially when damaged or at high temperatures.

Solid-state batteries replace a flammable liquid electrolyte in lithium-ion batteries with a more stable solid one. They also could have more power, faster charging, and a longer lifespan. Right now, lots of startups are trying to get their first batteries out of the lab and into a factory and hope to prove that solid-state batteries can be…

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