N-B-F Tridoped 3D Hierarchical Porous Graphitized Carbon Derived from Chitosan for High Performance Supercapacitors

The N-B-F tridoping 3D hierarchical porous graphitized carbon network is produced by a one-step synthesis using chitosan as a precursor. The N-B-F tridoping 3D hierarchical porous graphitized carbon network is rich of nitrogen, boron and fluorine hetero atoms and exhibited relatively high specific capacitance value of 316 F g–1 in 6 M KOH at a current density of 20.0 A g–1. As well as good cycling stability with capacitance retention of 100% over 10000 cycles, and good rate performance (90.3% capacity retention from 0.5 A g–1 to 20.0 A g–1). When used as supercapacitor electrode, the all carbon symmetric supercapacitor based on N-B-F tridoping 3D hierarchical porous graphitized carbon network delivers a high energy density of 23.87 Wh kg–1, outperforming the state-of-the-art carbon material.