▎ 摘　　要

NOVELTY - Preparation of hollow copper oxide-graphene composite material involves: (S100) adding graphene oxide to deionized water, ultrasonically treating (A), adding copper salt, and ultrasonically treating (B) to obtain a suspension; (S200) freeze-drying the suspension to obtain uniformly dispersed flocculant copper ion-loaded-graphene powder; (S300) placing the copper ion-loaded-graphene powder in a high-temperature environment, and reducing under an inert gas atmosphere to obtain a nano-copper-graphene composite; (S400) placing the nano-copper-graphene composite in a high-temperature ethylene glycol solvent, and stirring to obtain an ethylene glycol suspension; and (S500) pouring the suspension into ice water, so that nano-copper in the composite is oxidized to hollow copper oxide, vacuum filtering the suspension, and drying. USE - Preparation of hollow copper oxide-graphene composite material (claimed) used in gas sensing, non-enzyme glucose sensor, supercapacitor, and lithium-ion battery applications. ADVANTAGE - The method is simple, low in cost, and suitable for large-scale industrial production, controls the diameter of the hollow copper oxide loaded on the graphene sheet by adjusting the concentration of copper salt, and improves the volume expansion and weak conductivity of copper oxide particles in the process of storing lithium. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for the hollow copper oxide-graphene composite material, which comprises 77-86 wt.% copper oxide, and 14-23 wt.% graphene.