▎ 摘　　要

NOVELTY - A composite electrode material comprises spinel-type metal oxide rich in oxygen defects and graphene, where the composite electrode material has particle size of 20-200 nm and content of the graphene is 1-10 mass%. USE - Composite electrode material for fuel cells and supercapacitors. ADVANTAGE - The composite electrode is prepared in a simple and easy manner at low cost and large scale and of low cost and has excellent electrocatalytic activity, high charge and discharge capacity and better stability and rate discharge performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for preparing the composite electrode material.