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首页> 外文会议>Recent advances in supercapacitors >Carbon Dioxide Activated SiC-CDC: Attractive Material for Supercapacitor Electrodes
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Carbon Dioxide Activated SiC-CDC: Attractive Material for Supercapacitor Electrodes

机译：二氧化碳活化的SiC-CDC：超级电容器电极的有吸引力的材料

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Carbide-derived carbons (CDCs) were synthesized from SiC powders (SiC-CDC) via gas phase chlorination within the temperature range from 1000 ℃ to 1100 ℃. Thereafter the CDCs were additionally activated by CO_2 treatment method, resulting in nearly two-fold increase in specific surface area. The low-temperature nitrogen sorption experiments were performed and the specific surface areas from 1100 m~2 g~(-1) up to 2270 m~2 g~(-1) were obtained, depending on the extent of CO_2 activation. The energy and power density characteristics of the supercapacitors based on 1 M (C_2H_5)_3CH_3NBF_4 solution in acetonitrile and SiC-CDC as an electrode material were investigated using the cyclic voltammetry, electrochemical impedance spectroscopy, galvanostatic charge/discharge and constant power discharge methods. The electrochemical data indicated two-times increase in specific capacitance. The activation of SiC-CDC with CO_2 significantly increases (more than 40%) the performance of the supercapacitors, especially at higher potential scan rates and at higher power loads.
机译：在1000℃至1100℃的温度范围内，通过气相氯化法由SiC粉（SiC-CDC）合成了碳化物衍生的碳（CDC）。此后，通过CO_2处理方法另外激活了CDC，导致比表面积增加了近两倍。进行了低温氮吸附实验，根据CO_2活化程度，获得了比表面积从1100 m〜2 g〜（-1）到2270 m〜2 g〜（-1）。利用循环伏安法，电化学阻抗谱，恒电流充放电和恒功率放电方法研究了基于1 M（C_2H_5）_3CH_3NBF_4乙腈溶液和SiC-CDC作为电极材料的超级电容器的能量和功率密度特性。电化学数据表明比电容增加了两倍。用CO_2激活SiC-CDC可以显着提高（超过40％）超级电容器的性能，尤其是在更高的电位扫描速率和更高的功率负载下。

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  • 会议地点 Phoenix AZ(US)
  • 作者

    A. Janes; E. Tee; I. Tallo; T. Thomberg; E. Lust;

  • 作者单位

    Institute of Chemistry, University of Tartu, 14a Ravila Street, 50411 Tartu, Estonia;

    Institute of Chemistry, University of Tartu, 14a Ravila Street, 50411 Tartu, Estonia;

    Institute of Chemistry, University of Tartu, 14a Ravila Street, 50411 Tartu, Estonia;

    Institute of Chemistry, University of Tartu, 14a Ravila Street, 50411 Tartu, Estonia;

    Institute of Chemistry, University of Tartu, 14a Ravila Street, 50411 Tartu, Estonia;

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