▎ 摘　　要

NOVELTY - The method for preparing heteroatom co-doped porous carbon material based on direct liquidation of ionic liquid, involves adding carbon source and graphene oxide, adding ionic liquid to mixture, placing calcined mixture in a tube furnace, pre-sintering under inert gas protection to obtain carbon precursor, mixing carbon precursor with alkali metal hydroxide, heating under inert gas protection to obtain activated product, pickling the activated product, washing with deionized water to neutral, drying and grinding to obtain desired product. USE - Method for preparing heteroatom co-doped porous carbon material based on direct liquidation of ionic liquid, for electrode material of super capacitor and lithium secondary battery. ADVANTAGE - The non-toxic and environmentally-friendly method enables simple preparation of heteroatom co-doped porous carbon material with uniform pore size distribution, high specific surface area, high specific capacity and excellent cycle stability. DETAILED DESCRIPTION - Method for preparing heteroatom co-doped porous carbon material based on direct liquidation of ionic liquid, involves (1) adding carbon source and graphene oxide in a mass ratio of 6:1, adding 10 ml ionic liquid to mixture, ultrasonically processing for 3 hours, placing in the oven at 90 degrees C, calcining for 12 hours, (2) placing the calcined mixture in a tube furnace, pre-sintering at 300-600 degrees C for 1-3 hours at the rate of 1-5 degrees C/minute under inert gas protection to obtain carbon precursor, (3) mixing carbon precursor with alkali metal hydroxide in a mass ratio of 1:1-5, placing the mixture in a tube furnace, heating at 700-900 degrees C for 1-3 hours at the rate of 1-5 degrees C/minute under inert gas protection to obtain activated product, (4) pickling the activated product, washing with deionized water to neutral, drying and grinding to obtain desired product. The ionic liquid is selected from 1-butyl-3-methylimidazole sulfate, 1-methyl-3-ethylimidazole sulfate, 1-methyl-3-propylimidazole sulfate, 1-allyl-3-methylimidazole phosphate, 1-butyl-3-methylimidazole phosphate, 1-methyl-3-ethylimidazole phosphate and/or 1-methyl-3-propylimidazole phosphate.