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首页> 外文期刊>Journal of Materials Research >Bimodal porous carbon electrodes derived from polyfurfuryl alcohol/ phloroglucinol for ionic liquid based electrical double layer capacitors
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Bimodal porous carbon electrodes derived from polyfurfuryl alcohol/ phloroglucinol for ionic liquid based electrical double layer capacitors

机译：源自糠醇/间苯三酚的双峰多孔碳电极，用于离子液体基双电层电容器

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摘要

A hierarchical porous carbon with bimodal pore size distribution was synthesized using pyrolysis and controlled activation of polymer gel derived from furfuryl alcohol and phloroglucinol using a soft templating approach. Symmetric capacitors made using the synthesized carbon electrodes in neat 1-butyl 3-methylimidazolium tetrafluoroborate showed a specific capacitance of 141 F/g at 1 A/g when cycled between 0 and 3.8 V at room temperature. The capacitor also showed 90% capacitance retention over 5000 cycles. Equivalent circuit modeling of impedance spectra was done to monitor changes and provide microstructural details during cycling and temperature studies. Cyclic voltammetry showed the presence of specific adsorption of the electrolyte ions on the carbon electrode and this was in good agreement with strong dependence of specific capacitance on temperature. Such strong interaction along with the nature of electrical double layer formed in the hierarchical porous carbon results in widening the voltage stability window of the capacitor.
机译：使用热模板法，通过热解和衍生自糠醇和间苯三酚的聚合物凝胶的活化控制，合成了具有双峰孔径分布的分级多孔碳。当在室温下在0至3.8 V之间循环时，使用合成的碳电极在纯净的1-丁基3-甲基咪唑鎓四氟硼酸盐中制成的对称电容器在1 A / g下显示的比电容为141 F / g。该电容器在5000次循环中还显示出90％的电容保持率。进行了阻抗谱的等效电路建模，以监视变化并在循环和温度研究期间提供微结构细节。循环伏安法表明在碳电极上存在电解质离子的特异性吸附，这与比电容对温度的强烈依赖性非常吻合。这种强相互作用以及在分层多孔碳中形成的双电层的性质导致加宽电容器的电压稳定性窗口。

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  • 来源
    《Journal of Materials Research》 |2018年第9期|1189-1198|共10页
  • 作者

    Aref Amir Reza; Chou Chih-Chuan; Rajagopalan Ramakrishnan; Randall Clive;

  • 作者单位

    Penn State Univ, Dept Engn Sci & Mech, 227 Hammond Bldg, University Pk, PA 16802 USA;

    Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA;

    Penn State DuBois, Dept Engn, Du Bois, PA 15801 USA;

    Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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