▎ 摘　　要

NOVELTY - Preparing a heterostructure/graphene composite material involves adding phytic acid to the iron salt solution, stirring uniformly, adding the graphene oxide solution to the solution, and stirring uniformly. The solution is placed in a reaction kettle for hydrothermal reaction, washed the precipitate after the reaction is completed, and dried. The dried product is heat-treated in a reducing atmosphere and cooled to obtain a heterostructure FeP/Fe2P and graphene composite material. USE - Method for preparing a heterostructure/graphene composite material. ADVANTAGE - The method enables to prepare a heterostructure/graphene composite material enhances the catalytic ability and has excellent electrochemical performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a lithium-sulfur battery, which comprises heterostructure/graphene composite material.