储能科学与技术 ›› 2013, Vol. 2 ›› Issue (3): 227-232.doi: 10.3969/j.issn.2095-4239.2013.03.007

• 化学储能 • 上一篇    下一篇

全钒液流电池用PTFE-碳纳米管电极的性能

李丹丹, 褚有群, 李雯雯, 马淳安   

  1. 浙江工业大学化学工程与材料学院,浙江 杭州 310014
  • 收稿日期:2013-01-23 修回日期:2013-03-01 出版日期:2013-06-19 发布日期:2013-06-19
  • 通讯作者: 马淳安,教授,研究方向为材料电化学与有机电化学,E-mail:science@zjut.edu.cn.
  • 作者简介:李丹丹(1986--),女,硕士研究生,研究方向为全钒液流电池高活性电极材料
  • 基金资助:
    基金项目:浙江省科技厅创新团队项目(2011R09002-05)

Characteristics of graphite based composite electrodes containing carbon nanotubes for vanadium redox flow batteries

LI Dandan, CHU Youqun, LI Wenwen, MA Chunan   

  1. College of Chemical Engineering and Materials Science,Zhejiang University of Technology,Hangzhou 310014,Zhejiang,China
  • Received:2013-01-23 Revised:2013-03-01 Online:2013-06-19 Published:2013-06-19

摘要: 以聚四氟乙烯(PTFE)为黏结剂制备了不同组分的石墨粉(GP)和多壁碳纳米管(MWCNT)复合电极,采用恒电位阶跃,循环伏安,电化学阻抗谱及恒电流充放电等方法系统考察了GP-MWCNT复合电极在全钒液流电池(VRFB)体系中的电化学性能.实验结果表明:复合电极中MWCNT含量的增加有利于VRFB正,负极反应的进行,纯MWCNT电极表现出最优的电化学性能;以纯MWCNT电极为正,负极构建的VRFB电池在30 mA/cm2的恒电流充放电条件下表现出了良好的稳定性和电化学性能,电流效率,电压效率和能量效率分别为96%,87%和84%.

关键词: 全钒液流电池, 石墨, 碳纳米管, 复合电极, 电化学性能

Abstract: Graphite (GP) based composite electrodes containing multi-walled carbon nanotube (MWCNT) were prepared for vanadium redox flow batteries (VRFB) using polytetrafluoroethylene (PTFE) as binding agent. Electrochemical performance of the GP-MWCNT composite electrodes was characterized by chronoamperometry, cyclic voltammetry and electrochemical impedance spectroscopy. The results showed that both positive and negative electrode reactions of VRFB benefited from the use of more MWCNT in the composite electrode, and the best electrochemical performance was obtained with pure MWCNT electrode. A VRFB was therefore constructed using pure MWCNT electrodes as both the positive and negative electrodes. Preliminary charge/discharge tests at a current density of 30 mA/cm2 demonstrated that the VRFB had a good stability and electrochemical performance. The current efficiency, voltage efficiency and energy efficiency were 96%, 87% and 84%, respectively.

Key words: vanadium redox flow battery, graphite, multi-walled carbon nanotube, composite electrode, electrochemical performance

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