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题名: Large scale production of polyacrylonitrile-based porous carbon nanospheres for asymmetric supercapacitors
作者: Liu, YJ;  Cao, JY;  Jiang, XH;  Yang, YG;  Yu, LM;  Yan, XF
发表日期: 2018-4-28
摘要: The increasing demand for a satisfactory combination of energy-power features in supercapacitors has triggered considerable research efforts dedicated to the development of high-efficiency energy storage devices. In our study, highly cross-linked porous carbon microspheres were prepared via the carbonization of as-prepared polymer spheres followed by a KOH activation process. The resultant products exhibited a high maximum specific surface area (3065.6 m(2) g(-1)), rich nitrogen and oxygen doping (22.3 wt%) and a significant volume fraction of mesopores/macropores (37.91%). The optimal electrode presents the highest specific capacitance of 290 F g(-1) and superior cycling stability with 96% retention after 3000 cycles in an aqueous 2 M KOH electrolyte. Moreover, the assembled asymmetric supercapacitor device based on Co0.9Mn0.1 arrays as the positive electrode achieves a specific capacitance of 105.43 F g(-1) and an energy density of 134.9 W h kg(-1) at a power density of 2879.8 W kg(-1). Interestingly, the device can illuminate an LED for 30 min, demonstrating the promising application potential in high-performance devices related to energy storage.
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Recommended Citation:
Liu, YJ,Cao, JY,Jiang, XH,et al. Large Scale Production Of Polyacrylonitrile-based Porous Carbon Nanospheres For Asymmetric Supercapacitors[J]. Journal Of Materials Chemistry A,2018,6(16):6891-6903.

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