摘要
研究质子传导膜对全钒液流电池性能的影响,包括膜面电阻、阻钒性以及质子传导膜厚度,为研究开发适用于全钒液流电池的质子传导膜提供依据.通过测定钒电池循环充电/放电过程的效率、暂态极化曲线、静态交叉放电曲线,建立选择与优化膜材料的评价方法;在考察膜电导率、膜厚、阻钒性和机械强度的综合性能指标后,认为膜面电阻在0.3～0.5Ω.cm2范围,具备优良阻钒性能条件下,膜厚约150μm比较合适.使用符合该性能的聚偏氟乙烯质子传导膜时,钒电池能量效率超过70%,有望满足发展大容量蓄电储能装备的需要.
Proton conductive membrane used in the all-vanadium redox flow battery was discussed in this paper, including the effect of membrane＇s area resistance, vanadium permeability, and thickness on the battery. It contributes a basis for proton conductive membraner s research. By using the methods of transient polarization curves, cross-discharging curves, and battery efficiency test, the results showed that ： considering the membrane conductivity, thickness, vanadium permeability, and mechanical strength, the membrane＇s area resistance should be 0.3～0.5Ω·cm2 , and with good vanadium permeability and thickness should be about 150μm. The energy efficiency of the battery used PVDF-based membranes could up to 70%, which met the needs of developing the large-scale energy storage devices.
出处
《膜科学与技术》
CAS
CSCD
北大核心
2012年第6期34-38,共5页
Membrane Science and Technology
基金
国家自然科学基金资助项目(20876086
21076112)
国家"863"课题(2007AA05Z245)
国家重点基础研究发展计划(973计划)项目(2010CB227202)
关键词
全钒液流电池
质子传导膜
膜面电阻
阻钒性
膜厚
电池效率
all-vanadium redox flow battery
proton-conductive membrane
membrane area resistance
permeability
membrane thickness
battery efficiency
