Lithium-Metal Batteries A triple-layered, noncombustible PEO-based solid electrolyte incorporating DBDPE and Zeolite Beta is demonstrated for use in highly safe lithium-metal batteries. The electrode-contacting layer employs a highly concentrated LiTFSI solid polymer electrolyte to enhance electrode compatibility, facilitate the free movement of Li cations, and improve Li-ion conductivity. More in article number 2406200, Jae Hyun Kim and co-workers.