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首页> 外文期刊>Journal of power sources >An asymmetric supercapacitor with highly dispersed nano-Bi_2O_3 and active carbon electrodes
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An asymmetric supercapacitor with highly dispersed nano-Bi_2O_3 and active carbon electrodes

机译：具有高度分散的纳米Bi_2O_3和活性炭电极的非对称超级电容器

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摘要

An asymmetric supercapacitor constructed using an electrochemical double-layer, active carbon positive electrode and a Bi_2O_3/porous carbon negative electrode in an alkaline solution is presented here. In this study, nanosized Bi_2O_3 was formed and highly dispersed into a porous active carbon material using a simple process. The characteristics of the Bi_2O_3 electrode as well as its electrochemical performance in the hybrid device were investigated. A highly reversible redox transit was observed in the cyclic vol-tammogram of the Bi_2O_3 loaded electrode. The transformations of Bi(Ⅲ) to Bi(0) and Bi(0) to Bi(Ⅲ) are clearly shown in the charge/discharge curve of Bi_2O_3, with potential plateaus at -0.6 and -0.5 V. The results of this experiment reveal that, with introduction of the Faradic reaction of Bi/Bi_2O_3, the overall specific capacity of the hybrid supercapacitor during discharge was significantly increased compared to that of a symmetric set-up.
机译：本文介绍了一种在碱性溶液中使用电化学双层活性炭正极和Bi_2O_3 /多孔碳负极构建的不对称超级电容器。在这项研究中，形成了纳米级的Bi_2O_3，并使用简单的方法将其高度分散到多孔活性炭材料中。研究了Bi_2O_3电极的特性及其在混合器件中的电化学性能。在Bi_2O_3负载电极的循环伏安图中观察到高度可逆的氧化还原过渡。在Bi_2O_3的充电/放电曲线中清楚地显示了Bi（Ⅲ）到Bi（0）的转变，Bi（0）到Bi（Ⅲ）的转变，电位平稳在-0.6和-0.5V。本实验的结果揭示了通过引入Bi / Bi_2O_3的Faradic反应，与对称设置相比，混合超级电容器放电期间的总比容量显着增加。

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  • 来源
    《Journal of power sources》 |2014年第10期|129-135|共7页
  • 作者

    Deyu Qu; Lili Wang; Dong Zheng; Liang Xiao; Bohua Deng; Deyang Qu;

  • 作者单位

    Department of Chemistry, School of Science, Wuhan University of Technology, Wuhan, 430070 Hubei, PR China;

    Department of Chemistry, School of Science, Wuhan University of Technology, Wuhan, 430070 Hubei, PR China;

    Department of Chemistry, University of Massachusetts Boston, 100 Morrissey Blvd., Boston, MA 02482, USA;

    Department of Chemistry, School of Science, Wuhan University of Technology, Wuhan, 430070 Hubei, PR China;

    Department of Chemistry, School of Science, Wuhan University of Technology, Wuhan, 430070 Hubei, PR China;

    Department of Chemistry, University of Massachusetts Boston, 100 Morrissey Blvd., Boston, MA 02482, 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Hybrid supercapacitor; Bi_2O_3 electrode; Activated carbon; Cell balance;

    机译：混合超级电容器;Bi_2O_3电极;活性炭;电池电量平衡;

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