• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Cu-MOF derived Cu-C nanocomposites towards high performance electrochemical supercapacitors
【24h】

Cu-MOF derived Cu-C nanocomposites towards high performance electrochemical supercapacitors

机译：Cu-Mof衍生的Cu-C纳米复合材料朝向高性能电化学超级电容器

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

For the development of asymmetric supercapacitors with higher energy density, the study of new electrode materials with high capacitance is a priority. Herein, the electrochemical behavior of nano copper in alkaline electrolyte is first discovered. It is found that there are two obvious reversible redox symmetric peaks in the range of -0.8-0.2 V in the alkaline electrolyte, corresponding to the conversion of copper into cuprous ions, and then converting cuprous ions into copper ions, indicating that the nanocomposite electrode has the characteristics of a pseudocapacitive reaction. It has a specific capacitance of up to 318 F g(-1) at a current density of 1 A g(-1), which remains at nearly 100% after 10000 cycles at the same current density. When assembled with a Ni(OH)(2)-based electrode into an asymmetric supercapacitor, the device shows excellent capacitive behavior and good reaction reversibility. At 0.4 A g(-1), the supercapacitor delivers a reversible capacity of 8.33 F g(-1) with an energy density of 13.5 mW h g(-1). This study first discovers the electrochemical behavior of nano copper, which can provide a new research idea for further expanding the negative electrodes of supercapacitors with higher energy density.
机译：为了开发具有较高能量密度的不对称超级电容器，对具有高电容的新电极材料的研究是优先级。这里，首先发现纳米铜在碱性电解质中的电化学行为。结果发现，碱性电解质中存在两个明显的可逆氧化还原对称峰，对应于铜转化为铜离子，然后将亚铜离子转化为铜离子，表明纳米复合材料电极具有假偶联反应的特征。它具有高达318V（-1）的特定电容，其电流密度为1Ag（-1），其在相同电流密度的10000次循环后保持近100％。当用Ni（OH）（2）的电极组装成不对称超级电容器时，该装置显示出优异的电容性能和良好的反应可逆性。在0.4Ag（-1）时，超级电容器可提供8.33f g（-1）的可逆容量，其能量密度为13.5 mw h g（-1）。本研究首先发现了纳米铜的电化学行为，这可以提供一种以更高的能量密度进一步扩展超级电容器的负电极的新研究理念。

著录项

  • 来源
    《RSC Advances》 |2020年第8期|共9页
  • 作者

    Wang Jun; Rao Mumin; Ye Changchun; Qiu Yongcai; Su Wenjun; Zheng Sheng-run; Fan Jun; Cai Song-liang; Zhang Wei-Guang;

  • 作者单位

    South China Normal Univ Sch Chem Guangzhou 510006 Peoples R China;

    Guangdong Energy Grp Sci &

    Technol Res Inst Co Lt Guangzhou Peoples R China;

    South China Normal Univ Sch Chem Guangzhou 510006 Peoples R China;

    South China Univ Technol Sch Environm &

    Energy Guangzhou 51006 Peoples R China;

    Xi An Jiao Tong Univ Key Lab Educ Minist Modern Design &

    Rotor Bearing Syst Xian 710049 Peoples R China;

    South China Normal Univ Sch Chem Guangzhou 510006 Peoples R China;

    South China Normal Univ Sch Chem Guangzhou 510006 Peoples R China;

    South China Normal Univ Sch Chem Guangzhou 510006 Peoples R China;

    South China Normal Univ Sch Chem Guangzhou 510006 Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号