How Close Is The Future of Solid-State Batteries?
A solid-state battery uses solid electrodes and a solid electrolyte, instead of the liquid or polymer gel electrolytes found in lithium-ion or lithium polymer batteries. A solid state battery is often composed of varying materials the main one being ceramics (e.g. oxides, sulfides, phosphates), and/or solid polymers.
Solid-state batteries have found use in pacemakers, RFID and wearable devices. They are potentially safer, with higher energy densities, but at a much higher cost.