物理化学学报 >> 2010, Vol. 26 >> Issue (06): 1515-1520.doi: 10.3866/PKU.WHXB20100603

电化学 上一篇    下一篇

电化学混合电容器用新型聚吡咯/介孔碳纳米复合电极

张晶, 孔令斌, 蔡建军, 杨贞胜, 罗永春, 康龙   

  1. 兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室, 兰州 730050; 兰州理工大学材料科学与工程学院, 兰州 730050
  • 收稿日期:2010-01-01 修回日期:2010-02-21 发布日期:2010-05-28
  • 通讯作者: 孔令斌 E-mail:konglb@lut.cn

Novel Polypyrrole/Mesoporous Carbon Nanocomposite Electrode for an Electrochemical Hybrid Capacitor

ZHANG Jing, KONG Ling-Bin, CAI Jian-Jun, YANG Zhen-Sheng, LUO Yong-Chun, KANG Long   

  1. State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, P. R. China; School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, P. R. China
  • Received:2010-01-01 Revised:2010-02-21 Published:2010-05-28
  • Contact: KONG Ling-Bin E-mail:konglb@lut.cn

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摘要：

采用介孔碳CMK-3作为载体, 通过化学原位聚合的方法制备出一种新型的聚吡咯/介孔碳(PPy-CMK-3)纳米复合材料. 将该纳米复合材料作为正极, 配以介孔碳CMK-3为负极和1.0 mol·L-1 NaNO3中性电解液, 组装成为电化学混合电容器. 电化学测试表明: 在5.0 mA·cm-2电流密度和1.4 V充放电电位条件下, 其放电比容量达57 F·g-1, 电容器功率密度为2.5×102 W·kg-1, 能量密度达17 Wh·kg-1. 当电流密度从5.0 mA·cm-2增加至50 mA·cm-2时, 电容器的容量保持率在80%以上, 显示高倍率充放电特性优异. 此外, 聚吡咯-介孔碳/介孔碳电化学混合电容器易活化, 并具有优异的充放电效率和良好的循环稳定性能.

关键词: 介孔碳, 聚吡咯, 电化学混合电容器, 能量密度

Abstract:

With mesoporous carbon (CMK-3) serving as a support, we prepared a novel nanocomposite of polypyrrole/mesoporous carbon (PPy-CMK-3) by an in situ chemical polymerization method. An electrochemical hybrid capacitor was successfully designed using a PPy-CMK-3 composite and CMK-3 as positive and negative electrodes, respectively. The electrochemical capacitance performance of this kind of hybrid capacitor was investigated in 1.0 mol·L-1 NaNO3 electrolyte solution. The discharge capacity of the hybrid capacitor reached 57 F·g-1 under a current density of 5.0 mA·cm-2 and cell voltage of 1.4 V. The energy density of the hybrid capacitor reached 17 Wh·kg-1 with a power density of 2.5×102 W·kg-1. When the current density was increased from 5.0 to 50 mA·cm-2, the capacity of the hybrid capacitor remained at about 80% and it showed excellent high rate charge-discharge performance. Furthermore, the PPy-CMK-3/CMK-3 hybrid capacitor containing this PPy-CMK-3 nanocomposite could be active easily and it possessed a high charge-discharge efficiency and good cycle performance.

Key words: Mesoporous carbon, Polypyrrole, Electrochemical hybrid capacitor, Energy density

MSC2000: 

  • O646