▎ 摘　　要

NOVELTY - Nickel oxalate-nickel oxide-nickel (II) oxide/nitrogen-doped carbon/three-dimensional graphene composite material is having three-dimensional macroporous network structure and wrapped by a network of three-dimensional graphene. The nickel oxalate-nickel oxide-nickel (II) oxide/nitrogen-doped carbon/nitrogen-doped carbon nanotubes are interspersed between the sheets of three-dimensional graphene. USE - Nickel oxalate-nickel oxide-nickel (II) oxide/nitrogen-doped carbon/three-dimensional graphene composite material used in a chemical power source (claimed). ADVANTAGE - The nickel oxalate-nickel oxide-nickel (II) oxide/nitrogen-doped carbon/three-dimensional graphene composite material has high capacity, good multiplying power performance and strong circulation stability, in simple manner. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing nickel oxalate-nickel oxide-nickel (II) oxide/nitrogen-doped carbon/three-dimensional graphene composite material, which involves: (A) preparing surface-modified polypyrrole nanotubes; (B) using the polypyrrole nanotube prepared as a substrate material, growing nickel-cobalt-based precursor composite material on the surface to obtain a composite material; (C) hydrothermal self-assembling ppy nickel-cobalt-pre composite material and graphene oxide solution to form hydrogel; and (D) using ppy nickel-cobalt-pre hydrogel as the precursor, high-temperature carbonization reduction and low-temperature oxidation form product.