Measurement and accurate prediction of surface tension for VOSO4-H2SO4-H2O ternary electrolyte system at high-concentration in vanadium redox flow batteries

Ye Qin, Peixia Qi,Jinling Zhao,Xiangrong Li,Na Wang, Qingpeng Li, Jing Ge,Jianguo Liu,Jiazhen Yang,Chuanwei Yan

Journal of Molecular Liquids（2022）

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摘要

•The surface tension and density for VOSO4-H2SO4-H2O ternary electrolyte of VRFB were measured.•High precision semi-empirical equation was established to predict the surface tension with a high concentration.•Molar surface entropy, s, molar surface enthalpy, h, and Eötvös empirical parameter was calculated.•The predicted values are in good agreement with the experimental values with correlation coefficient of 0.9993.

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关键词

Vanadium redox flow battery,Electrolyte,Surface tension,Vanadyl sulfate,Molar surface Gibbs free energy,Eötvös equation

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