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首页> 外文期刊>Energy Conversion & Management >Calcination removing soft template cetyl trimethyl ammonium bromide and its effects on capacitance performance of supercapacitor electrode MnO_2
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Calcination removing soft template cetyl trimethyl ammonium bromide and its effects on capacitance performance of supercapacitor electrode MnO_2

机译：煅烧去除软模板十六烷基三甲基溴化铵及其对超级电容器电极MnO_2电容性能的影响

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摘要

It is the first time to use calcination methods to remove the residual surfactant Cetyl Trimethyl Ammonium Bromide (CTAB) acting as soft template or structure directing agent for supercapacitor MnO_2 electrodes. MnO_2 was synthesized by liquid co-precipitation in the presence of CTAB. The as-prepared oxides heated at different heat treatment temperature are characterized systematically by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM), N_2 physical adsorption, cyclic voltammetry (CV) and galvanostatic charge/discharge tests. Results indicate that CTAB can be removed completely with the increase of heat treatment temperature, but the temperature also has great influences on the performance of MnO_2. The free water, physical adsorption water and crystalline water lose successively, and the crystalline changes from amorphous α-MnO_2·nH_2O, first to crystalline MnO_2, then to α-Mn_2O_3 and α-Mn_3O_4 accompanying with the oxygen loss process. Simultaneously, the specific capacitance and specific surface area of material exhibit similar variation trends being increase at first and then decrease as the heat calcination temperature increases. Sample MO-200 treated at 200 ℃ has the largest Brunauer-Emmett-Teller (BET) specific surface area (276.2 m~2g~(-1)) and specific capacitance (240.1 Fg~(-1)) at 500 mAg~(-1). Therefore, in view of improving the capacitance performance, the relative low heat treatment temperature is suitable for MnO_2 materials.
机译：这是首次使用煅烧方法去除残留的表面活性剂十六烷基三甲基溴化十六烷基铵（CTAB），作为超级电容器MnO_2电极的软模板或结构导向剂。在CTAB存在下，通过液相共沉淀法合成了MnO_2。通过X射线衍射（XRD），扫描电子显微镜（SEM），透射电子显微镜（TEM），N_2物理吸附，循环伏安法（CV）和恒电流电荷/放电测试。结果表明，随着热处理温度的升高，可以完全去除CTAB，但温度对MnO_2的性能也有很大的影响。游离水，物理吸附水和结晶水依次流失，随着氧的损失，晶体从非晶态的α-MnO_2·nH_2O转变为结晶态的MnO_2，然后转变为α-Mn_2O_3和α-Mn_3O_4。同时，材料的比电容和比表面积表现出相似的变化趋势，该趋势首先随着热煅烧温度的升高而增大，然后减小。在200℃处理的样品MO-200在500 mAg〜（）时具有最大的Brunauer-Emmett-Teller（BET）比表面积（276.2 m〜2g〜（-1））和比电容（240.1 Fg〜（-1））。 -1）。因此，考虑到改善电容性能，相对低的热处理温度适用于MnO_2材料。

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  • 来源
    《Energy Conversion & Management》 |2014年第10期|605-613|共9页
  • 作者

    Huaihao Zhang; Jiangna Gu; Yuanyuan Jiang; Yaqiong Wang; Jing Zhao; Xiaoxing Zhang; Chengyin Wang;

  • 作者单位

    College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, PR China;

    College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, PR China;

    College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, PR China;

    College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, PR China;

    College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, PR China;

    College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, PR China;

    College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, PR 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

    MnO_2; Capacitance; Cetyl Trimethyl Ammonium Bromide; (CTAB);

    机译：MnO_2;电容;十六烷基三甲基溴化铵;（CTAB）;

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