Why Is Everyone Trying to Build a Solid-State Battery?

Solid-state batteries, which replace the liquid electrolyte in traditional lithium-ion batteries with a solid material, are attracting massive investment and research efforts from major manufacturers like CATL, Samsung, and LG, as well as over $4 billion in funding for startups. These batteries offer significant advantages including lighter weight, improved safety due to the elimination of flammable liquid electrolyte, and reduced fire risk compared to conventional lithium-ion batteries.