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As the influx of electric vehicles is booming, automakers and tech companies have been focusing on optimizing an EV‘s most vital and expensive part: the battery.

And while lithium-ion batteries have been the mainstream option so far, there’s another promising competitor on the making: solid-state batteries.

What do they have in common?

Both types use lithium to produce electrical energy and their overall structure is quite similar. Simply put, they have an anode (the battery’s negative side), a cathode (the battery’s positive side), and an electrolyte.

Credit: ChargedEVs