▎ 摘　　要

NOVELTY - Preparing sponge nickel sulfide composite material comprises (i) taking nickel acetate as nickel source, and hydrazine hydrate as reducing agent for hydrothermal reaction to obtain sponge nickel support, (ii) placing the sponge nickel support in a tubular furnace, continuously introducing mixed gas of argon and hydrogen, and using ethanol as carbon source to obtain graphene-coated sponge nickel by one-step chemical vapor deposition reaction, and (iii) taking the sponge nickel coated by the graphene as the nickel source, and the thiourea as the sulfur source to obtain the sponge nickel sulfide composite material by the hydrothermal method. USE - The sponge nickel sulfide composite material is used as electrocatalyst for hydrogen production for mobile communication, electric automobile, solar power generation and aerospace applications (claimed). ADVANTAGE - The composite material has large specific surface area, high cycle life, and low over-potential.