钒电解液在纳米多孔质子膜中的动态迁移规律研究

Investigation on Vanadium Electrolyte Dynamic Transfer Across Nano-porous Proton Membrane

考察了不同电流密度、不同温度下电解液在纳米多孔质子膜中的迁移情况,在多次充放电循环后,钒离子与水均在负极积累,正极电解液体积线性减小,负极电解液体积线性增大,同时研究了电解液迁移对充放电容量的影响,研究表明,钒离子的跨膜迁移会导致充电与放电瓦时容量在不断衰减。

Vanadium electrolyte dynamic transfer across nano- porous proton membrane in the vanadium redox flow battery at different current densities and temperatures was investigated. The results show that vanadium ions and water accumulate in negative side eventually, the positive electrolyte increases linearly and the negative electrolyte decreases linearly. The influence of vanadium electrolyte dynamic transfer on charge/discharge capacity was also studied.The results show that the watt-hour capacity decreases gradually due to vanadium ions transfer across membrane.