Preparation and Properties of Nitrogen-doped Graphene Composite Carbon Materials Prepared from Different Nitrogen Sources

Abstract

To get materials with better electrochemical properties, the physicochemical properties of nitrogen-doped graphene composite carbon materials prepared from different nitrogen sources are investigated in this paper. Nitrogen-doped graphene composite carbon materials with pyridine, urea, and melamine as nitrogen sources (NGpyridine, NGurea, and NGmelamine) were prepared by electrospinning and post-heat treatment. The results show that graphene exists in all three kinds of composite carbon fibers in the form of multi-layers. The NGmelamine fibers have more defects, the distribution of NGpyridine fibers is more uniform and the diameter of NGpyridine fibers is mostly concentrated in 270-330 nm. The maximum current density of NGpyridine is 27.51 mA/cm2, that of NG urea is 8.99 mA/cm2, and that of NGmelamine is 2.24 mA/cm2. In comparison, NGpyridine shows better electrochemical performance.