▎ 摘　　要

NOVELTY - Three-dimensional graphene bifunctional oxygen electrode catalyst comprises three-dimensional graphene, nitrogen, aluminum and cobalt nanometre particles in three-dimensional graphene. USE - Three-dimensional graphene bifunctional oxygen electrode catalyst. ADVANTAGE - The three-dimensional graphene bifunctional oxygen electrode catalyst has improves electrochemical activity, good catalytic activity and stability to oxygen reduction reaction under acidic condition and exhibits excellent catalytic performance for oxygen evolution reaction under alkaline condition. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing three-dimensional graphene bifunctional oxygen electrode catalyst, which involves: (A) adding graphite oxide, cobalt precursor, aluminum precursor, nitrogen precursor, template agent and alkaline agent to obtain mixed solution; (B) adding mixed solution to hydrothermal reactor for performing hydrothermal reaction to obtain three-dimensional graphene hydrogel cobalt-heteroatoms; (C) washing three-dimensional graphene hydrogel cobalt-heteroatoms and drying to obtain three-dimensional graphene aerogel; (D) calcining three-dimensional graphene aerogel to obtain cobalt-heteroatom; and (E) cutting to obtain three-dimensional graphene bifunctional oxygen electrode catalyst.