▎ 摘　　要

NOVELTY - A nitrogen-containing porous carbon material is prepared by dispersing recovered tobacco filter as carbon precursor and urea as nitrogen source in ethanol, then soaking in graphene oxide and carbonizing. USE - The nitrogen-containing porous carbon material is used as electrode material for supercapacitor (claimed). ADVANTAGE - The nitrogen-containing porous carbon material has excellent electrical conductivity and high specific surface area. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation method of nitrogen-containing porous carbon material.