▎ 摘　　要

NOVELTY - Preparing polymer/graphene composite solid electrolyte membrane comprises (i) adding the polymer and the salt lithium into the solvent, and mixing to obtain the pre-complex, (ii) adding lithium-loaded graphene to the pre-complex, and mixing to obtain suspension, and (iii) solidifying and drying the suspension liquid. USE - Preparing polymer/graphene composite solid electrolyte membrane used in polymer solid battery e.g. lithium ion battery. ADVANTAGE - The membrane improves the crystallization phenomenon of the polymer PEO, has better charging and discharging multiplying power and circulating performance, reduces the impedance, reduces the graphene distribution in the preparation process, reduces the energy consumption, and provides solid electrolyte film with strong interaction between the graphene and the polymer-lithium. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for polymer/graphene composite solid electrolyte membrane prepared according to above mentioned method.