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首页> 外文期刊>Journal of porous materials >Buckwheat husk-derived hierarchical porous nitrogen-doped carbon materials for high-performance symmetric supercapacitor
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Buckwheat husk-derived hierarchical porous nitrogen-doped carbon materials for high-performance symmetric supercapacitor

机译：荞麦壳衍生的等级多孔氮气掺杂碳材料，用于高性能对称超级电容器

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摘要

A facile one-step strategy is established to prepare nitrogen doped three-dimensional (3D) hierarchical porous carbon from buckwheat husk, in which the synchronous activation and nitrogen-doping is fulfilled via using KOH and urea. The obtained sample (BSCN-700) possesses an ultrahigh specific surface area of 2794.5m(2) g(-1) with a unique carbon frame. The electrochemical measurements indicate that the resultant BSCN-700 exhibits a high specific capacitance of 326F g(-1) at current density of 1A g(-1), with good rate capability (78.4% capacitance retention at 100A g(-1)) in 6M KOH electrolyte. Furthermore, the as-prepared sample was used to assemble a symmetric supercapacitor filled with 6M KOH electrolyte. As a result, the BSCN-700 symmetric supercapacitor displays a high energy density of 20.4 Wh kg(-1) at a power density of 699W kg(-1) and good cycling stability which retains 95% of the initial capacitance at 5A g(-1) after 5000 cycles.
机译：建立一个容易的一步策略以制备来自荞麦壳的氮气掺杂的三维（3D）分层多孔碳，其中通过使用KOH和尿素来满足同步活化和氮气掺杂。所得样品（BSCN-700）具有2794.5M（2）G（-1）的超高比表面积，其具有独特的碳框架。电化学测量表明，所得BSCN-700的电流密度为1A G（-1）的高比电容，具有良好的速率能力（100Ag（-1）的电容保留78.4％电容保留）在6M KOH电解质中。此外，使用AS制备的样品组装填充有6M KOH电解质的对称超级电容器。结果，BSCN-700对称超级电容器以699WKG（-1）的功率密度显示20.4WH kg（-1）的高能量密度，良好的循环稳定性，其在5a g处保留95％的初始电容（ -1）5000周期后。

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  • 来源
    《Journal of porous materials》 |2019年第4期|1217-1225|共9页
  • 作者

    Qiang Lulu; Hu Zhongai; Li Zhimin; Yang Yuying; Wang Xiaotong; Zhou Yi; Zhang Xinyuan; Wang Wenbin; Wang Qian;

  • 作者单位

    Northwest Normal Univ Key Lab Ecoenvironm Related Polymer Mat Key Lab Polymer Mat Gansu Prov Minist Educ Coll Chem & Chem Engn Lanzhou 730070 Gansu Peoples R China;

    Northwest Normal Univ Key Lab Ecoenvironm Related Polymer Mat Key Lab Polymer Mat Gansu Prov Minist Educ Coll Chem & Chem Engn Lanzhou 730070 Gansu Peoples R China;

    Northwest Normal Univ Key Lab Ecoenvironm Related Polymer Mat Key Lab Polymer Mat Gansu Prov Minist Educ Coll Chem & Chem Engn Lanzhou 730070 Gansu Peoples R China;

    Northwest Normal Univ Key Lab Ecoenvironm Related Polymer Mat Key Lab Polymer Mat Gansu Prov Minist Educ Coll Chem & Chem Engn Lanzhou 730070 Gansu Peoples R China;

    Northwest Normal Univ Key Lab Ecoenvironm Related Polymer Mat Key Lab Polymer Mat Gansu Prov Minist Educ Coll Chem & Chem Engn Lanzhou 730070 Gansu Peoples R China;

    Northwest Normal Univ Key Lab Ecoenvironm Related Polymer Mat Key Lab Polymer Mat Gansu Prov Minist Educ Coll Chem & Chem Engn Lanzhou 730070 Gansu Peoples R China;

    Northwest Normal Univ Key Lab Ecoenvironm Related Polymer Mat Key Lab Polymer Mat Gansu Prov Minist Educ Coll Chem & Chem Engn Lanzhou 730070 Gansu Peoples R China;

    Northwest Normal Univ Key Lab Ecoenvironm Related Polymer Mat Key Lab Polymer Mat Gansu Prov Minist Educ Coll Chem & Chem Engn Lanzhou 730070 Gansu Peoples R China;

    Northwest Normal Univ Key Lab Ecoenvironm Related Polymer Mat Key Lab Polymer Mat Gansu Prov Minist Educ Coll Chem & Chem Engn Lanzhou 730070 Gansu Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Symmetric supercapacitor; Buckwheat husk; Nitrogen-doping; Hierarchical porous carbon; High rate capability;

    机译：对称超级电容器;荞麦壳;氮气掺杂;分层多孔碳;高速率能力;

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