Asymmetric Supercapacitor Based on Porous N-doped Carbon Derived from Pomelo Peel and NiO Arrays

作者：Qu, Gan; Jia, Shuangfeng; Wang, Hai; Cao, Fan; Li, Lei; Qing, Chen; Sun, Daming; Wang, Bixiao; Tang, Yiwen^*; Wang, Jianbo^*

来源：ACS Applied Materials & Interfaces, 2016, 8(32): 20822-20830.

DOI：10.1021/acsami.6b06630

• pomelo peel
• carbon
• N-doped
• NiO
• arrays
• asymmetric supercapacitor

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.

• 出版日期2016-8-17
• 单位武汉大学; 华中师范大学