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首页> 外文期刊>Applied Surface Science >Hierarchically porous carbon derived from biomass: Effect of mesopore and heteroatom-doping on electrochemical performance
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Hierarchically porous carbon derived from biomass: Effect of mesopore and heteroatom-doping on electrochemical performance

机译：源自生物质的分层多孔碳：中孔和杂原子掺杂对电化学性能的影响

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摘要

Two kinds of porous carbons derived fromOsmanthus fragransandSterculia lychnophora,respectively, are prepared by hydrothermal carbonization and KOH activation. The characterizations of electron microscopy and N2adsorption-desorption isotherms show that bothOsmanthus fragrans-derived porous carbon andSterculia lychnophora-derived porous carbon have the hierarchical micro/meso/macroporous structure with interpenetrating network, but pore structure is mainly the micropore forOsmanthus fragrans-derived porous carbon, while more mesopore forSterculia lychnophora-derived porous carbon. The surface chemical analysis reveals thatSterculia lychnophora-derived porous carbon has CN and more oxygen-containing groups in comparison with theOsmanthus fragrans-derived porous carbon. When used as electrode materials for EDLC, theSterculia lychnophora-derived porous carbon electrodes deliver higher specific capacitance, higher capacitance retention and better cycling stability thanOsmanthus fragrans-derived porous carbon. The superior electrochemical performance ofSterculia lychnophora-derived porous carbon is mainly attributed to the abundant mesopore, doping of N atom as well as more oxygen-containing groups. Finally, symmetrical supercapacitors are assembled bySterculia lychnophora-derived porous carbon electrodes and release a high energy density of 9.58 W h kg−1with a powder density of 500 W kg−1. The results showed that preparation of porous carbon materials from biomass is effectively procedure to improve high performance ELDC devices, and the selection of biomass precursors is the key in the preparation high performance electrode materials for ELDC.
机译：通过水热碳化和KOH活化分别制备了两种提取物：桂花和小球藻。电子显微镜和N 2吸附-解吸等温线的特征表明，桂花来源的多孔碳和Sterculia lychnophora来源的多孔碳具有分层的微/介孔/大孔结构，具有互穿网络，但孔结构主要是桂花来源的多孔碳，而更多的中孔用于来自Sterculia lychnophora的多孔碳。表面化学分析显示，与源自桂花的多孔碳相比，来自Sterculia lychnophora的多孔碳具有CN和更多的含氧基团。当用作蛇毒EDLC的电极材料时，来源于Sterculia lychnophora的多孔碳电极比源自桂花的多孔碳具有更高的比电容，更高的电容保持率和更好的循环稳定性。来源于Sterculia lychnophora的多孔碳的优异电化学性能主要归因于丰富的中孔，N原子的掺杂以及更多的含氧基团。最终，对称的超级电容器由来源于蛇纹夜蛾的多孔碳电极组装而成，释放出9.58 W h kg-1的高能量密度，粉末密度为500 W kg-1。结果表明，由生物质制备多孔碳材料是改善高性能ELDC器件的有效方法，生物质前体的选择是制备ELDC高性能电极材料的关键。

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  • 来源
    《Applied Surface Science》 |2018年第1期|8-16|共9页
  • 作者

    Hongying Quan; Xiaoyu Fan; Wenxiu Wang; Weimin Gao; Yinghu Dong; Dezhi Chen;

  • 作者单位

    School of Materials Science and Engineering, Nanchang Hangkong University;

    NanoSolutions Co.Ltd;

    School of Materials Science and Engineering, Nanchang Hangkong University,Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, School of Environmental and Chemical Engineering, Nanchang Hangkong University;

    Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, School of Environmental and Chemical Engineering, Nanchang Hangkong University;

    School of Materials Science and Engineering, Nanchang Hangkong University;

    Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, School of Environmental and Chemical Engineering, Nanchang Hangkong University;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Biomass; Hierarchical pore; Heteroatomic doping; Electrode materials; Supercapacitors;

    机译：生物质;层级孔;杂原子掺杂;电极材料;超级电容器;

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