基于柚子皮衍生的多孔 N 掺杂碳和 NiO 阵列的非对称超级电容器。
Asymmetric Supercapacitor Based on Porous N-doped Carbon Derived from Pomelo Peel and NiO Arrays.
机构信息
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.
Institute of Nano-Science & Technology, Department of Physics and Technology, Central China Normal University , Wuhan, Hubei Province 430079, China.
出版信息
ACS Appl Mater Interfaces. 2016 Aug 17;8(32):20822-30. doi: 10.1021/acsami.6b06630. Epub 2016 Aug 3.
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.
通过氨掺杂和基于柚子皮的石墨化成功制备了具有高比表面积的三维（3D）多孔框架状 N 掺杂碳（PFNC）。由于大量的空隙和孔为循环过程中的离子扩散提供了充足的途径，因此所得到的 PFNC 表现出增强的比电容（在 1 A g(-1)时为 260 F g(-1)）和优异的循环性能（在 10 A g(-1)时经过 10000 次循环后电容保持率为 84.2%）。此外，基于 PFNC 和多孔片状 NiO（PFN）阵列构建的不对称 PFNC//PFN 器件在 0.4 A g(-1)时具有 88.8 F g(-1)的比电容，在 300 W kg(-1)的功率密度下具有 27.75 Wh kg(-1)的能量密度，在 10 A g(-1)时仍保持 44 F g(-1)，在 7500 W kg(-1)的功率密度下具有 13.75 Wh kg(-1)。重要的是，该器件能够为两个发光二极管供电 25 分钟，这展示了巨大的应用潜力。
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