化工学报 ›› 2011, Vol. 62 ›› Issue (S2): 135-139.DOI: 10.3969/j.issn.0438-1157.2011.z2.023

• 能源和环境工程 • 上一篇    下一篇

离子液体BMIMBF4对全钒液流电池正极电解液的影响

李梦楠,谢晓峰,杨春,王金海,王树博,尚玉明   

  1. 清华大学核能与新能源技术研究院
  • 收稿日期:2011-12-04 出版日期:2011-12-20 发布日期:2011-12-20
  • 通讯作者: 李梦楠

Characteristics of BMIMBF4 as anode electrolyte additive for vanadium redox flow battery

LI Mengnan,XIE Xiaofeng,YANG Chun,WANG Jinhai,WANG Shubo,SHANG Yuming   

  • Received:2011-12-04 Online:2011-12-20 Published:2011-12-20

摘要: 为提高全钒液流电池的能量密度和正极电解液稳定性,采用循环伏安、交流阻抗等方法,研究了1-丁基-3-甲基咪唑四氟硼酸盐(BMIMBF4)作为正极电解液添加剂对溶液稳定性和电化学反应活性的影响,并对其机理进行了初步探讨。实验结果表明,添加BMIMBF4后,正极电解液中五价钒离子的稳定性显著提高,电解液的电化学反应活性也有所提升。当添加量为1%时,电池的单位体积电容量比有所增加,并且能量效率有所提升。

关键词: 全钒液流电池, 正极电解液, 添加剂, 离子液体

Abstract: 1-Butyl-3-methylimidazolium tetrafluoroborate(BMIMBF4)was used as the additive in anode electrolyte for vanadium redox flow battery(VRB). Its electrochemical performance and stability were investigated by cyclic voltammetry(CV),electrochemical impedance spectrum(EIS),charge-discharge measurement and examination of stabilization. The results indicated that the electrochemical activity and stability of the anode electrolyte were improved by adding BMIMBF4. The electric capacity of unit volume and the energy efficiency were also increased.

Key words: all vanadium redox flow battery, anode electrolyte, additive, ionic liquid