▎ 摘　　要

NOVELTY - Preparation of graphene-nickel bicarbonate nano-cube three-dimensional composite material, involves preparing graphene oxide hydrogel by Hummer's process, dispersing prepared graphene oxide in water to obtain graphene oxide hydrogel, adding graphene oxide hydrogel to urea, stirring, slowly adding nickel acetate, stirring to obtain precursor solution, heating to obtain graphene-nickel hydrogen carbonate aerogel, washing the graphene-nickel hydrogen carbonate aerogel with pure water to remove soluble impurities, vacuum freezing to obtain final product. USE - Method for preparing graphene-nickel bicarbonate nano-cube three-dimensional composite material for use in anode of lithium ion battery material and supercapacitor electrode material (all claimed). ADVANTAGE - The environmentally-friendly method enables simple and economical preparation of graphene-nickel bicarbonate nano-cube three-dimensional composite material with excellent electrical properties and excellent energy saving effect. DETAILED DESCRIPTION - Method for preparing graphene-nickel bicarbonate nano-cube three-dimensional composite material, involves (1) preparing graphene oxide hydrogel by Hummer's process, dispersing prepared graphene oxide in water, ultrasonically processing to obtain graphene oxide hydrogel, where the surface of graphene oxide hydrogel is negative charge, (2) adding graphene oxide hydrogel to urea, stirring for 5-10 minutes, slowly adding nickel acetate, stirring for 5-10 minutes to obtain precursor solution, transferring the precursor solution to reactor, heating at 180 degrees C for 24 hours to obtain graphene-nickel hydrogen carbonate aerogel, (3) washing the graphene-nickel hydrogen carbonate aerogel with pure water to remove soluble impurities, vacuum freezing at 56 degrees C to obtain final product.