A solid-state battery is a battery technology that uses solid electrodes and a solid electrolyte, instead of the liquid or polymer gel electrolytes found in lithium-ion or lithium polymer batteries. This architecture offers potential benefits such as higher energy density, faster charging times, and improved safety due to reduced flammability.
Solid electrolytes were discovered in the 19th century by Michael Faraday. However, practical application in high-energy batteries has been a long challenge. Recent advancements in materials science have accelerated their development for electric vehicles and electronics.
Solid-state batteries are a key focus for the automotive industry to enable longer-range electric vehicles that are safer and charge faster. Major companies like Toyota, QuantumScape, and others are racing to commercialize the technology, with mass production expected in the late 2020s.