▎ 摘　　要

NOVELTY - Method for preparing hierarchical pore graphene involves (a) preparing lignin/carbonate or lignin/basic carbonate solid powder, (b) carbonizing and activating lignin/carbonate or lignin/basic carbonate solid powder, in the carbonization process, using the gas produced by the thermal decomposition of carbonate or alkali carbonate for gas phase stripping, (c) pickling the lignin carbon/oxide composite material with acid solution, using uniform nano-scale metal oxide particles synchronously generated after the decomposition of carbonate/alkali carbonate as a hard template to form uniform mesoporous pores after etching to obtain a lignin porous carbon material, (d) oxidizing the lignin porous carbon material, and peeling off the graphitized carbon layer in an organic solvent environment by microwave blasting to obtain graphene oxide, and (e) subjecting graphene oxide to high-temperature reduction treatment to obtain the product. USE - Method used for preparing hierarchical pore graphene used for preparing ionic capacitors (claimed), and in energy storage including lithium-ion batteries and supercapacitor electrode materials. ADVANTAGE - The method produces hierarchical pore graphene with excellent electrochemical performance, is simple and efficient, saves energy and consumption reduction, has larger specific surface area and excellent porosity. DETAILED DESCRIPTION - Method for preparing hierarchical pore graphene involves (a) preparing lignin/carbonate or lignin/basic carbonate solid powder, (b) carbonizing and activating lignin/carbonate or lignin/basic carbonate solid powder to obtain a lignin carbon/oxide composite material, in the carbonization process, using the gas produced by the thermal decomposition of carbonate or alkali carbonate for gas phase stripping to form micropores and macropores, (c) pickling the lignin carbon/oxide composite material with acid solution, using uniform nano-scale metal oxide particles synchronously generated after the decomposition of carbonate/alkali carbonate as a hard template to form uniform mesoporous pores after etching to obtain a lignin porous carbon material, (d) oxidizing the lignin porous carbon material to obtain the oxidized lignin hierarchical porous carbon material, and peeling off the graphitized carbon layer in an organic solvent environment by microwave blasting to obtain graphene oxide, and (e) subjecting graphene oxide to high-temperature reduction treatment to obtain the product.