Solid electrolytes are materials that conduct ions while remaining in a solid state. They are used in various applications, including batteries and fuel cells, to facilitate the movement of charged particles. Unlike liquid electrolytes, solid electrolytes offer advantages such as improved safety, stability, and energy density. These materials can be made from different compounds, including ceramics and polymers. One notable example is lithium garnet, which is known for its high ionic conductivity. Solid electrolytes are essential for the development of next-generation energy storage systems, enabling more efficient and longer-lasting devices.