▎ 摘　　要

NOVELTY - Electrolyte membrane, comprises component a including a block copolymer comprising a polymer lithium salt segment and a polyester segment; and component b including lithium salt modified graphene oxide. USE - The electrolyte membrane is useful in battery (claimed). ADVANTAGE - The electrolyte membrane has reduced polarization degree under voltage, and lithium ion migration number of higher (≥ 0.8), and improved ionic conductivity by the incorporation of lithium salt-modified graphene oxide. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for battery comprising the electrolyte membrane.