▎ 摘　　要

NOVELTY - Use of crop waste in preparing graphene hollow carbon nano-cage material is claimed. The crop waste is bagasse, peanut shell, rice grass, straw, tea leaf stalks, corn stalks and/or vines. USE - The crop waste in preparing graphene hollow carbon nano-cage material; and graphene hollow carbon nano-cage material is useful in preparing super capacitor (claimed). ADVANTAGE - The graphene hollow carbon nano-cage material has simple preparation processes, utilizes cheaply available raw material; and has high efficiency. DETAILED DESCRIPTION - Use of crop waste in preparing graphene hollow carbon nano-cage material is claimed. The crop waste is bagasse, peanut shell, rice grass, straw, tea leaf stalks, corn stalks and/or vines. INDEPENDENT CLAIMS are also included for: (1) preparation of (A) comprising placing crop waste as solid carbon source, transition metal acetate as catalyst precursor and solid carbon source in crucible, placing catalyst precursor on upper layer of crucible to cover heat treatment, collecting supernatant, carrying out acid treatment, washing, filtrating, and then drying to obtain final product, where mass ratio between solid carbon source and catalyst precursor is 1:0.1-0.5, and acid treatment is upper layer product is soaking with 8-12 mol/l hydrochloric acid for 1-3 hours; and (2) graphene hollow carbon nano-cage material obtained by above method.