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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

钒液流电池用碳纸电极改性的研究

刘素琴1, 史小虎1, 黄可龙1, 李晓刚2   

  1. 1. 中南大学 化学化工学院, 长沙 410083; 2. 湖南农业大学 生物安全科学技术学院, 长沙 410128
  • 收稿日期:2008-11-26 修回日期:2009-01-14 出版日期:2009-07-20 网络出版日期:2009-07-20

Characteristics of Carbon Paper as Electrode for Vanadium Redox Flow Battery

LIU Su-Qin1, SHI Xiao-Hu1, HUANG Ke-Long1, LI Xiao-Gang2   

  1. 1. College of Chemistry ＆ Chemical Engineering, Central South University, Changsha 410083, China; 2. College of Biosafety Science ＆ Technology, Hunan Agricultural University, Changsha 410128, China
  • Received:2008-11-26 Revised:2009-01-14 Published:2009-07-20 Online:2009-07-20

PDF (PC)

1784

被引次数

75 | 3

摘要： 采用红外光谱、单点比表面积检测手段研究了碳纸435℃热处理前后的表面结构和比表面积的变化. 并将这类碳纸用作全钒液流氧化还原电池电极材料, 对其电化学性能进行了研究. 结果表明：热处理10h的碳纸表面有-COOH官能团生成, 比表面积显著增大, 其电化学活性增强. 热处理后的碳纸作为电极组装成的电池在电流密度50mA/cm2时有良好的充放电性能, 平均电流和电压效率达到95%和89%.

关键词: 钒液流电池, 碳纸, 热处理

Abstract: The carbon paper (CP) heat-treated at 435℃ for 10h were characterized by FTIR spectroscopy and BET, and their electrochemical behaviors were investigated by cyclic voltammograms, impedance spectroscopy and charge-discharge techniques. The results show that -COOH functional groups form after heattreated for 10h and specific surface area increases significantly. The vanadium redox battery with modified CP electrode exhibits excellent performance at current density of 50mA/cm2. The average current efficiency reaches 95% and average voltage efficiency reaches 89%. The improvement of electrochemical performance for the electrode is ascribed to the -COOH group and the special surface of CP.

Key words: vanadium redox battery, carbon paper, heat-treatment

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