▎ 摘　　要

NOVELTY - Double network hydrogel derived graphene/tin-nickel alloy composite material comprises nickel/cyano/tin bridged hydrogel and graphene oxide gel as precursor. The reduction reaction of graphene and tin-nickel alloy networks interlaced network structure are performed. The network structure in tin-nickel alloy nanoparticles and graphene are uniformly distributed on three dimensional direction. USE - Double network hydrogel derived graphene/tin-nickel alloy composite material as cathode material of lithium ion battery (claimed). ADVANTAGE - The double network hydrogel derived graphene/tin-nickel alloy composite material has excellent lithium storage property. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing double network hydrogel derived graphene/tin-nickel alloy composite material, which involves: (A) adding reaction material tin, nickel potassium cyanide, graphene oxide and polymer cross-linking agent to obtain double-network hydrogel; (B) interwoving on three-dimensional direction of nickel/cyano/tin bridged hydrogel and graphene oxide hydrogel to obtain nickel/cyano/tin bridged hydrogel and graphene oxide gel as precursor; (C) adding the excess reducing agent to make double-network hydrogel; and (D) adding reducing agent, washing the product and drying to obtain graphene/tinnickel alloy composite material.