▎ 摘　　要

NOVELTY - Graphene three-dimensional graded porous carbon material preparation comprises crushing coconut, palm and apricot shells, adding to complexing agent, uniformly mixing, and processing in constant temperature water bath, washing, and filtering; adding hydrogen peroxide solution, acetic acid, nitric acid and potassium chloride to filter residue, ultrasonically processing, and heating in constant temperature water bath; centrifuging or filtering, washing, and drying; carbonizing under high-purity inert gas protection; activating; and naturally cooling, repeatedly washing, and drying. USE - Method for preparing graphene three-dimensional graded porous carbon material (claimed). ADVANTAGE - The method realizes utilization of biowaste and avoids use of chemical raw material. The porous carbon material has tulle-like texture and lattice fringes of folds and rules; comprises micropores, mesopores and macropores; and has better conductivity than existing porous carbon material. DETAILED DESCRIPTION - Graphene three-dimensional graded porous carbon material preparation comprises: (A) crushing coconut shells, palm shells and apricot shells, adding to 0.1-0.5% complexing agent (such as disodium EDTA) solution, uniformly mixing, placing in constant temperature water bath and processing at 40-100 degrees C for 0.5-2.5 hours, washing, and filtering to obtain filter residue; (B) adding 0-10 wt.% hydrogen peroxide solution, 0-15 wt.% acetic acid, 1-10 wt.% nitric acid and 1-5 wt.% potassium chloride to filter residue, ultrasonically processing for 0-30 minutes, and placing in constant temperature water bath and heating at 30-80 degrees C for 2-16 hours; (C) centrifuging or filtering the obtained mixture, washing with deionized water, and drying; (D) carbonizing dry product at 300-700 degrees C for 20-120 minutes under high-purity inert gas protection; (E) adding composite activating agent and 5 wt.% deionized water to carbonized material, mixing, and activating at 700-1200 degrees C for 20-180 minutes; and (F) naturally cooling activated product to room temperature, repeatedly washing with deionized water until neutral, and drying. The composite activating agent comprises potassium chloride, potassium hydroxide, sodium hydroxide, sodium carbonate, potassium carbonate and zinc chloride. The weight ratio of activating agent and carbonized material is 0.5-4:1.