钒电池电解液体积变化规律研究  

Electrolyte Volume Change Study in All Vanadium RedoxFlow Battery

作　　者：赵永涛[1,2] 席靖宇[1] 滕祥国 武增华[1] 邱新平[1,2] 

机构地区：[1]清华大学深圳研究生院绿色化学电源实验室,深圳518055 [2]清华大学化学系,北京100084 [3]哈尔滨工业大学(威海)应用化学系,威海264209

出　　处：《化学学报》2011年第2期132-136,共5页Acta Chimica Sinica

基　　金：国家自然科学基金(No.20973099);深圳市基础研究计划(No.JC200903180530A)资助项目

摘　　要：研究了钒电池在使用阳离子交换膜稳定运行过程中电解液体积的变化情况,分析了影响因素,并总结了变化规律.离子的电迁移使电解液体积随充放电容量的变化线性改变,充电过程正极电解液体积线性减小,负极电解液体积线性增大;放电过程反之.多次充放电循环过程中,钒离子的净渗透方向是由负极到正极,水的净变化方向与钒离子相同,最终使得多次循环过程正极电解液的体积逐渐增加.Rule of electrolyte volume change was studied when the all vanadium redox flow battery was running stably with a cation exchange membrane.Electric transfer of ions will make the volume change linearly with the changing of charge-discharge capacity,that is,the positive electrolyte will be less and the negative electrolyte will be more during the charge process,which will be reversed in the discharge process.The direction of net infiltration of vanadium ions is from the negtive electrolyte to the positive electrolyte,which will make the volume of positive electrolyte larger in a couple of cycles.The direction of net water transfer is the same as the vanadium ions.

关 键 词：钒电池 电解液 体积变化率 离子电迁移率 

分 类 号：TM912[电气工程—电力电子与电力传动]