▎ 摘　　要

NOVELTY - A polymer solid electrolyte, comprises polymer electrolyte membrane and coating on surface of polymer electrolyte membrane. The coating comprises graphene oxide material or graphite powder material. USE - Polymer solid electrolyte used in polymer solid-state battery (claimed). ADVANTAGE - The powder material has excellent ductility and appropriate stiffness, and improved interface contact and reaction between polymer electrolyte and lithium metal cathode and cycle stability of battery. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) preparation of polymer solid electrolyte; and (2) polymer solid-state battery, which comprises cathode and anode set oppositely, and coating close to one side of cathode.