▎ 摘　　要

NOVELTY - A metal nano-particle loaded graphene hydrogel composite material is prepared by uniformly dispersing graphene oxide into weakly acidic aqueous solution containing metal salt, reacting in a water bath at 80-100 degrees C, and naturally crimping and dries at room temperature, after cooling and washing, and carrying out heat treatment at 130-400 degrees C in reducing atmosphere. USE - Metal nano-particle loaded graphene hydrogel composite material used in lithium ion battery and sodium ion battery. ADVANTAGE - The composite material provides batteries with high electrochemical performance, high volume specific capacity, rate performance and cycle stability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the metal nano-particle loaded graphene hydrogel composite material.