Fabrication and enhanced electrochemical performance of a nitrogen-doped porous graphene/nanometer-sized carbide-derived carbon composite for supercapacitors
- 22 Downloads
Herein, we fabricated a nitrogen-doped porous graphene/nanometer-sized carbide-derived carbon (NPG/nCDC) composite. In this architecture, the nCDC with a hierarchical pore structure is used as spacer to inhibit the agglomeration of NPG ensuring the in-plane diffusion paths for electrolyte ions and has contribution to the specific surface area and the pore structure of the composite as well. The nano-sized pores existing on the NPG sheets can provide the cross-plane diffusion paths for electrolyte ions. Furthermore, the nitrogen doping to NPG can further enhance the capacitive performance of the composite. Benefiting from these advantages, the NPG/nCDC composites exhibit outstanding supercapacitive performance. Its specific capacitance is up to 336 F g−1 at 5 mV s−1 in 6 mol L−1 KOH electrolyte, and 99.3% capacitance can be maintained even after 10,000 cycles, demonstrating the great potential as the electrode material for supercapacitors.
KeywordsPorous graphene Carbide-derived carbon N-Doped graphene Carbon composite Supercapacitor
- 5.Wang P, Sun S, Wang S, Zhang Y, Zhang G, Li Y et al (2017) Ultrastable MnO2 nanoparticle/three-dimensional N-doped reduced graphene oxide composite as electrode material for supercapacitor. J Appl Electrochem 48:1–11Google Scholar