▎ 摘　　要

NOVELTY - Ammonium crosslinked block copolymer/graphene composite material comprises crosslinked type quat. ammonium ion-containing styrenic block copolymer, and 0.05-2.5 wt.% aminated modified graphene oxide. USE - Ammonium crosslinked block copolymer/graphene composite material used for producing fuel cell electrolyte membrane material. ADVANTAGE - The product has high ion conductivity, and low methanol permeability, which optimizes comprehensive performance of composite material. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of ammonium crosslinked block copolymer/graphene composite material comprising mixing chloromethylated styrenic block copolymers with bifunctional or trifunctional organic tert. amine compound and modified graphenol in organic media, reacting, and subjecting to negative ion exchange in alkaline solution.