▎ 摘　　要

NOVELTY - Cobalt sulfide/graphene hydrogel nanocomposite material preparation method involves stirring graphene oxide dispersed in isopropanol to prepare a dispersion, successively placing the dispersion, cobalt chloride solution, sodium sulfide solution in a container to obtain a reaction solution, again placing in a sealed autoclave and maintaining the reaction at a constant temperature at 100-220 degrees C, and washing the product to obtain cobalt sulfide/graphene hydrogel nanocomposite material. USE - Cobalt sulfide/graphene hydrogel nanocomposite material preparation method (claimed). ADVANTAGE - The preparation method is simple and easy to test without adding any binder. The preparation method effectively inhibits the agglomeration of graphene sheets, and improves the electrochemical properties of the nanocomposite material.