▎ 摘　　要

NOVELTY - A nitrogen-doped three-dimensional porous graphene contains total nitrogen content of 6-10. The conductivity of nitrogen-doped three-dimensional porous graphene is 232-427 S.m-1. USE - Nitrogen-doped three-dimensional porous graphene for use in electrode material. ADVANTAGE - The nitrogen-doped three-dimensional porous graphene increases the effective contact area of the material, improves electrochemical performance, improves specific capacitance and cycle performance for electrode materials, and is prepared by simple process at low equipment cost. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of nitrogen-doped three-dimensional porous graphene, which involves (S1) dispersing graphite oxide in deionized water and ultrasonically dispersing to obtain 1 mg/ml graphene oxide suspension, (S2) adding nitrogen-doping agent to suspension, uniformly stirring the mixture, (S3) increasing the temperature of the mixture, cooling the mixture to room temperature to obtain solid-liquid mixture, (S4) separating the precipitated product in the solid-liquid mixture, washing and drying to obtain final product.