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投稿时间:2018-01-09 修订日期:2018-01-11 录用日期:2018-01-15 网络发布日期:2018-06-15
投稿时间:2018-01-09 修订日期:2018-01-11 录用日期:2018-01-15 网络发布日期:2018-06-15
中文摘要: 通过对含有不同浓度镁杂质离子的电解液进行循环伏安测试、黏度测试及热稳定性测试,考察镁离子对电解液电化学性能及稳定性的影响。结果表明,当电解液中镁杂质离子浓度超过0.96 g/L时,电解液黏度从0.89 mm2/s增大至0.95 mm2/s,电解液中钒离子扩散系数从(2.06~3.33)×10-6 cm2/s降低至(1.30~2.11)×10-6 cm2/s,导致电极反应速率和电极反应可逆性降低;同时电解液中出现钒离子大量沉淀现象,电解液稳定性降低,严重影响钒电池的正常运行。
Abstract:Effect of magnesium ion on electrochemical performance and stability of electrolyte was investigated by cyclic voltammetry, viscosity test and thermal stability test of electrolyte containing different concentrations of magnesium impurity ion. The results show that with concentration of magnesium ion in electrolyte of 0.96 g/L above, viscosity of electrolyte rises from 0.89 mm2/s to 0.95 mm2/s, diffusion coefficient of vanadium ion drops from (2.06~3.33)×10-6 cm2/s to (1.30~2.11)×10-6 cm2/s, resulting in reduction of electrode reaction rate and reversibility of electrode reaction. In addition, precipitation of a large amount of vanadium ion in electrolyte reduces stability of electrolyte and affects normal operation of vanadium redox flow battery.
keywords: vanadium redox flow battery electrolyte magnesium ion electrochemical performance stability
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基金项目:国家自然科学基金资助项目(51774216);湖北省技术创新专项重大项目(2017ACA185)
引用文本:
丁木清,刘涛,张一敏,黄晶,杨亚东,刘聪.镁杂质离子对钒电池电解液性能的影响研究[J].有色金属(冶炼部分),2018(7):45-49.
Ding Muqing,Liu Tao,Zhang Yimin,Huang Jing,Yang Yadong,Liu Cong.Effect of Impurity Magnesium Ion on Electrolyte Performance of Vanadium Redox Flow Battery[J].Nonferrous Metals (Extractive Metallurgy),2018(7):45-49.
丁木清,刘涛,张一敏,黄晶,杨亚东,刘聪.镁杂质离子对钒电池电解液性能的影响研究[J].有色金属(冶炼部分),2018(7):45-49.
Ding Muqing,Liu Tao,Zhang Yimin,Huang Jing,Yang Yadong,Liu Cong.Effect of Impurity Magnesium Ion on Electrolyte Performance of Vanadium Redox Flow Battery[J].Nonferrous Metals (Extractive Metallurgy),2018(7):45-49.

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