▎ 摘　　要

NOVELTY - Pantothenic acid salt or its mixture is heated to 400-2500 degrees C in a non-oxidizing atmosphere to obtain mixture of in-situ nitrogen-doped porous graphene and metal oxide mixture. The metal oxide mixture is removed from the mixture to obtain in-situ nitrogen-doped porous graphene. The pantothenic acid salt is lithium, sodium, potassium, rubidium, magnesium, calcium, strontium, barium, cobalt, nickel, manganese, zinc, lead, copper, cadmium, aluminum or indium. USE - Preparation of in-situ nitrogen-doped porous graphene (claimed) used in porous lithium-ion battery, supercapacitor, and biological field. ADVANTAGE - The method provides in-situ nitrogen-doped porous graphene having large specific-surface area within a short period of time, by a simple process.