Abstract: Vanadium redox flow battery is a highly efficient storage energy installs. The electrolyte influence the battery capacity directly. V(Ⅲ)-V(Ⅳ) electrolyte of vanadium redox flow battery was prepared by chemical method with V2O3，V2O5 and H2SO4 in this paper. The impacts of the additives of alcohol and sodium pyrophosphate on the stability and the electrochemical activity of electrolyte were investigated. The experimental results showed that the electrolyte with V(Ⅲ)/V(Ⅳ) concentration ratio of 1.0 was acquired with the V2O3/V2O5 mass ratio of 7.2∶1. And the stability and the electrochemical activity of the electrolyte were improved by adding the additives.

Key words: vanadium redox flow battery, electrolyte, additive, stability

摘要： 钒电池是一种高效储能装置，钒电池电解液直接影响电池性能。本文以V2O3、V2O5和H2SO4为原料，化学合成了用于钒电池的V(Ⅲ)-V(Ⅳ)电解液，研究了无水乙醇与焦磷酸钠作为添加剂对电解液稳定性和电化学活性的影响。实验结果表明，当V2O3/V2O5质量比为7.2∶1时，可以得到V(Ⅲ)/V(Ⅳ)离子浓度比为1.0的电解液；添加剂的加入能提高电解液的稳定性和电化学反应活性。

关键词: 钒电池, 电解液, 添加剂, 稳定性