 The abstract summarizes the research conducted on a new type of polymer electrolyte material called differentiated salt multi-layered polyethylene oxide based solid polymer electrolyte DSMSP, which was developed to improve the performance of lithium metal batteries. This material has been shown to have excellent electrochemical properties, including high ionic conductivity, a large electrochemical window, and good stability when used as a battery electrolyte. These features make it ideal for use in high voltage lithium metal batteries. This article was authored by Qin Wang, Tao Wang, Long Long Wang, and others.