title: Asymmetric Supercapacitor Based on Porous N-doped Carbon Derived from Pomelo Peel and NiO Arrays.
abstract: 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.
authors.affiliation: School of Physics and Technology, Center for Electron Microscopy and MOE Key Laboratory of Artificial Micro- and Nano-structures, and Institute for Advanced Studies, Wuhan University , Wuhan, Hubei Province 430072, China.
authors.forename: Gan
authors.initials: G
authors.lastname: Qu
authors.affiliation: School of Physics and Technology, Center for Electron Microscopy and MOE Key Laboratory of Artificial Micro- and Nano-structures, and Institute for Advanced Studies, Wuhan University , Wuhan, Hubei Province 430072, China.
authors.forename: Shuangfeng
authors.initials: S
authors.lastname: Jia
authors.affiliation: Institute of Nano-Science & Technology, Department of Physics and Technology, Central China Normal University , Wuhan, Hubei Province 430079, China.
authors.forename: Hai
authors.initials: H
authors.lastname: Wang
authors.affiliation: School of Physics and Technology, Center for Electron Microscopy and MOE Key Laboratory of Artificial Micro- and Nano-structures, and Institute for Advanced Studies, Wuhan University , Wuhan, Hubei Province 430072, China.
authors.forename: Fan
authors.initials: F
authors.lastname: Cao
authors.affiliation: School of Physics and Technology, Center for Electron Microscopy and MOE Key Laboratory of Artificial Micro- and Nano-structures, and Institute for Advanced Studies, Wuhan University , Wuhan, Hubei Province 430072, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Li
authors.affiliation: Institute of Nano-Science & Technology, Department of Physics and Technology, Central China Normal University , Wuhan, Hubei Province 430079, China.
authors.forename: Chen
authors.initials: C
authors.lastname: Qing
authors.affiliation: Institute of Nano-Science & Technology, Department of Physics and Technology, Central China Normal University , Wuhan, Hubei Province 430079, China.
authors.forename: Daming
authors.initials: D
authors.lastname: Sun
authors.affiliation: Institute of Nano-Science & Technology, Department of Physics and Technology, Central China Normal University , Wuhan, Hubei Province 430079, China.
authors.forename: Bixiao
authors.initials: B
authors.lastname: Wang
authors.affiliation: Institute of Nano-Science & Technology, Department of Physics and Technology, Central China Normal University , Wuhan, Hubei Province 430079, China.
authors.forename: Yiwen
authors.initials: Y
authors.lastname: Tang
authors.affiliation: School of Physics and Technology, Center for Electron Microscopy and MOE Key Laboratory of Artificial Micro- and Nano-structures, and Institute for Advanced Studies, Wuhan University , Wuhan, Hubei Province 430072, China.
authors.forename: Jianbo
authors.initials: J
authors.lastname: Wang
keywords: N-doped; NiO; arrays; asymmetric supercapacitor; carbon; pomelo peel