有机/无机复合添加剂对钒液流电池正极电解液的影响  

Effect of organic/inorganic composite additives on cathode electrolyte of vanadium flow batteries

作　　者：刘彦峰[1] 陈凤英[1] 左恒 李晓龙 黄刚 宋月红 LIU Yanfeng;CHEN Fengying;ZUO Heng;LI Xiaolong;HUANG Gang;SONG Yuehong(Shaanxi Engineering Research Center for Mineral Resources Clean&Efficient Conversion and New Materials,Shangluo University,Shangluo Shaanxi 726000,China;Shaanxi Wuzhou Mineral Company,Shangluo Shaanxi 726000,China)

机构地区：[1]商洛学院陕西省尾矿资源综合利用重点实验室,陕西商洛726000 [2]陕西五洲矿业股份有限公司,陕西商洛726000

出　　处：《电源技术》2025年第2期438-442,共5页Chinese Journal of Power Sources

基　　金：陕西省重点研发计划项目(2022LL-JB-09);陕西省教育厅重点实验室项目(22JS014)。

摘　　要：选用硫酸铁铵、乙醇、乙二醇、丙三醇为添加剂,分别添加到钒液流电池电解液中,考察添加剂对电解液粘度、紫外可见光谱和循环伏安特性的影响。根据循环伏安测试的结果,选取硫酸铁铵为无机添加剂、丙三醇为有机添加剂,组成复合添加剂,通过循环伏安法和交流阻抗法研究复合添加剂对电解液电化学过程的影响,测试了复合添加剂存在下,电极反应的动力学性能。结果表明虽然添加剂会使电解液的粘度有所增加,但是不会改变电解液中钒离子的价态和浓度,可以改善电极反应的活性和可逆性,尤其是复合添加剂的效果最为显著。The ammonium iron sulfate,ethanol,ethylene glycol,and propylene glycol were selected as additives,and added into the electrolyte of vanadium flow batteries.The effects of the additives on the viscosity,UV visible spectrum,and cyclic voltammetry characteristics of the electrolyte were investigated.Based on the results of cyclic voltammetry testing,the ammonium iron sulfate was selected as the inorganic additive,the propylene glycol was selected as the organic additive,and a composite additive was formed.The effect of the composite additive on the electrochemical process of the electrolyte was studied by cyclic voltammetry and impedance spectroscopy.The kinetic performance of the electrode reaction in the presence of the composite additive was examined.The results show that although the additive increases the viscosity of the electrolyte,it doesn't change the valence state and concentration of vanadium ions in the electrolyte,which can improve the activity and reversibility of the electrode reaction.Especially,the effect of the composite additive is the most significant.

关 键 词：钒液流电池 添加剂 电化学活性 

分 类 号：TM91[电气工程—电力电子与电力传动]