▎ 摘　　要

NOVELTY - Preparing high content of pyridine nitrogen-doped porous carbon cathode material comprises (i) reacting melamine with formaldehyde solution to obtain mixed solution containing melamine formaldehyde resin, (ii) adding graphene oxide into mixed solution, stirring and heating for 1-3 hours, then centrifuging and separating, removing supernatant, and drying the residual product at 90-98 degrees C, where ratio of melamine to graphene oxide is 12.5-25:1, and (iii) subjecting dried product to carbonization treatment at 500-900 degrees C under inert gas atmosphere. USE - The cathode material is useful as membrane in GF/A series of glass fiber filter paper (claimed). ADVANTAGE - The cathode material is conducive to infiltration of electrolyte and potassium ions in the electrolyte diffusion, utilizes high content of pyridine nitrogen doping in the electrolyte to increases conductivity of the material, provides many active sites for potassium ion, and enlarges space between the layers of material. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) high content of pyridine nitrogen-doped porous carbon cathode material is prepared by above mentioned method; and (2) use method comprising (a) mixing high pyridine containing nitrogen-doped porous carbon cathode material, acetylene black and carboxymethyl cellulose, coating on copper foil to form cathode, and (b) directly assembling the cathode in half-cell potassium ion with pure potassium tablet, a separator and an electrolyte, or assembling with potassium pre-charging 3,4,9,10-perylene-tetracarboxylicacid-dianhydride (PTCDA) anode, separator and electrolyte in potassium ion full cell.