Why are solid-state batteries so important?

Excerpt from techwireasia.com

Solid-state batteries have been hailed as the “holy grail” of electric vehicle (EV) batteries, but what exactly are they all about?

To answer that, we first need to look at how electric vehicles work.

Electric vehicles, also known as all-electric vehicles or battery electric vehicles, are powered by an electric motor instead of an internal combustion engine.

EVs are fitted with a large traction battery pack, which is rechargeable through charging equipment directly connected to a wall electricity outlet (also known as electric vehicle supply equipment, EVSE).

As EVs run purely on electricity from batteries, it doesn’t emit exhaust, unlike combustion engines that use petroleum or natural gas.