▎ 摘　　要

NOVELTY - Nitrogen-doped porous graphene preparation involves adding 3-10g nano nickel powder dispersed in 300-1000ml trisaminomethane hydrochloric acid buffer solution with the 0.1-5mg/ml dopamine concentration. The obtained mixture is ultrasonically oscillated. The obtained mixture is mechanically stirred at room temperature for 5-10 hours. The obtained stirred mixture is heated at 50 degrees C for 1-4 hours. The obtained mixture is rolled with 50 cm diameter roller. Nitrogen doped porous graphene precursor is prepared by mixing polydopamine as the solid precursor, nickel as catalyst and template. USE - Method for preparing nitrogen-doped porous graphene used for super capacitor (claimed). ADVANTAGE - The method enables to prepare nitrogen-doped porous graphene in a simple and cost-effective manner. DETAILED DESCRIPTION - Nitrogen-doped porous graphene preparation involves adding 3-10g nano nickel powder dispersed in 300-1000ml trisaminomethane hydrochloric acid buffer solution with the 0.1-5mg/ml dopamine concentration. The obtained mixture is ultrasonically oscillated. The obtained mixture is mechanically stirred at room temperature for 5-10 hours. The obtained stirred mixture is heated at 50 degrees C for 1-4 hours. The obtained mixture is rolled with 50 cm diameter roller. Nitrogen doped porous graphene precursor is prepared by mixing polydopamine as the solid precursor, nickel as catalyst and template. The obtained mixture is sintered in a sintering furnace at 800-1000 degrees C in presence of inert gas. The obtained mixture is cooled at room temperature. to form graphene doped with nitrogen product coated by the nickel sheet body. The obtained nickel sheet body is etched with strong acid and acid. The obtained product is washed, and then dried.