▎ 摘　　要

NOVELTY - Preparing porous graphene lithium-ion battery cathode material comprises: (i) preparing graphite oxide modified hummer; (ii) preparing porous graphene hydrothermal-solvothermal self-assembly by (ii.a) configuring graphene oxide solution by dispersing the graphite oxide solution under ultrasound; (ii.b) carrying out hydrothermal or solvent thermal reaction of step (ii.a) resultant, (ii.c) displacing organic solvent of step (ii.b) resultant with deionized water and lyophilizing to obtain porous graphene; and (iii) carrying out reduction-doping process of porous graphene into thin film. USE - The lithium-ion battery cathode material is useful in preparing porous graphene (claimed). ADVANTAGE - The cathode material has discharge capacity upto 175 mAh/g with cycle stability. The preparation method is economical and suitable for large-scale industrial production. DETAILED DESCRIPTION - Preparing porous graphene lithium-ion battery cathode material comprises: (i) preparing graphite oxide modified hummer; (ii) preparing porous graphene hydrothermal-solvothermal self-assembly by (ii.a) configuring graphene oxide solution by dispersing the graphite oxide solution under ultrasound for 10minutes- 10 hours; (ii.b) carrying out hydrothermal or solvent thermal reaction of step (ii.a) resultant at 80-240 degrees C for 30 minutes-48 hours, (ii.c) displacing organic solvent of step (ii.b) resultant with deionized water and lyophilizing to obtain porous graphene; and (iii) carrying out reduction-doping process of step (ii) porous graphene into thin film.