▎ 摘　　要

NOVELTY - Composite electrode comprises a porous carbon electrode body and a three-dimensional graphene formed on the surface of the porous carbon electrode body, where the surface of three-dimensional graphene is deposited with metal catalyst particles having catalytic action on the electrolyte of the liquid flow battery. USE - The composite electrode is useful for liquid flow battery (claimed). ADVANTAGE - The composite electrode has high specific surface area, high catalytic activity and high hydrophilicity characteristics, and greatly improves the energy efficiency. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparation method of composite electrode of liquid flow battery.