Journal
RSC ADVANCES
Volume 6, Issue 104, Pages 101988-101994Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ra18769b
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Funding
- National Natural Science Foundation of China [21505018, 21121091, 21005016]
- Fundamental Research Funds for Central Universities
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Here, we present a facile approach to synthesizing nitrogen-doped porous carbon materials (NPCs) through carbonization of poly(o-phenylenediamine) (PoPD) by using molten-salt as a template. The as-prepared NPCs exhibit hierarchically micro-nanometric porous structure and unprecedented nitrogen content (14.86 wt%). The micrometric pores are interconnected which form from the micrometric salt droplets during carbonization, while the nanopores are generated by the exclusion of small molecular gases. This unique structure and high nitrogen content endows the NPCs with excellent specific capacitance (364.93 F g(-1) at 2 mV s(-1)) and good cycling stability (92.3% capacitance retention at 10 A g(-1) after 5000 cycles) in 6 M KOH electrolyte. Moreover, the symmetric supercapacitor array fabricated with the NPCs can easily power a light-emitting diode (LED), demonstrating the practical application of the NPCs in energy storage.
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