Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 8, Issue 32, Pages 20822-20830Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b06630
Keywords
pomelo peel; carbon; N-doped; NiO; arrays; asymmetric supercapacitor
Funding
- 973 Program [2011CB933300]
- National Natural Science Foundation of China [51572102, 51271134, J1210061, 51501132]
- Fundamental Research Funds for the Central Universities
- CERS-China Equipment and Education Resources System [CERS-1-26]
- China Postdoctoral Science Foundation [2014T70734]
- CCNU from the Colleges' Basic Research and Operation of MOE [CCNU15GF006]
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A three dimensional (3D) porous framework-like N-doped carbon (PFNC)-with a high specific surface area was successfully fabricated through ammonia doping and graphitization based on pomelo peel. The obtained PFNC exhibits an enhanced specific capacitance (260 F g(-1) at 1 A g(-1)) and superior cycling performance (capacitance retention of 84.2% after 10000 cycles at 10 A g(-1)) on account of numerous voids and pores which supply sufficient pathways for ion diffusion during cycling. Furthermore, a fabricated asymmetric PFNC//PFN device based on PFNC and porous flake-like NiO (PFN) arrays achieves a specific capacitance of 88.8 F g(-1) at 0.4 A g(-1) and an energy density of 27.75 Wh kg(-1) at a power density of 300 W kg(-1) and still retains 44 F g(-1) at 10 A g(-1) and 13.75 Wh kg(-1) at power density of 7500 W kg(-1). It is important that the device is able to supply two light-emitting diodes for 25 min, which demonstrates great application potential.
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