▎ 摘　　要

NOVELTY - The method involves using reduced graphene oxide as a substrate, through freeze-drying and calcination processes and obtaining uniformly dispersed ultra-small metal nano-particle materials. 1 mg/ml graphene oxide aqueous solution is prepared. The concentrated sulfuric acid, weigh graphite, sodium nitrate, and potassium permanganate for use are measured. 30 percentage hydrogen peroxide is added to the conical flask. The solution A is poured into a polytetrafluoroethylene mold and put on liquid nitrogen to freeze. The frozen solid is freeze dried to obtain a porous graphene oxide foam. USE - Method for dispersing uniformly dispersed ultra-small metal nanoparticle materials (claimed). ADVANTAGE - The utilization of active materials is improved. The graphene substrate effectively prevent the agglomeration between nanoparticles. The volume expansion of active materials during charging and discharging is alleviated. The cycle stability of electrode materials is improved. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the synthetic transmission electron microscope.