RE:Solid State BatteriesSolid-state batteries are composed of solid electrodes and a solid electrolyte, as opposed to the liquid or polymer gel electrolytes found in traditional lithium-ion batteries. The specific materials used in solid-state batteries can vary, but they typically include lithium metal for the anode and oxides or sulfides for the cathode. The solid electrolyte acts as an ideal separator that allows only lithium ions to pass through. Some common materials proposed for use as solid electrolytes include ceramics, such as oxides, sulfides, and phosphates, as well as solid polymers.