钒电池五价钒溶液的电导性质

doi:10.3969/j.issn.2095-4239.2015.05.007

储能科学与技术 ›› 2015, Vol. 4 ›› Issue (5): 498-505.doi: 10.3969/j.issn.2095-4239.2015.05.007

钒电池五价钒溶液的电导性质

李享容^{1, 3}, 何虹祥¹, 许维国^{1, 2}, 刘建国¹, 秦野¹, 杨家振^{1, 2}, 许茜³, 严川伟¹

1 中国科学院金属研究所,辽宁沈阳 110016;
2 辽宁大学化学院,辽宁沈阳 110036;
3 东北大学材料与冶金学院,辽宁沈阳 110819

收稿日期:2015-08-12 出版日期:2015-10-19 发布日期:2015-10-19
通讯作者: 秦野,助理研究员,研究方向为储能电池,E-mail：yqin @imr.ac.cn。
作者简介:李享容（1988—）,女,博士研究生,研究方向为钒电池溶液热力学,E-mail：360760020@qq.com
基金资助:
国家自然基金青年基金（21403254）及国家自然科学基金面上项目（21373009）

Study on the conductivities of V(Ⅴ) solution of vanadium flow battery

LI Xiangrong^{1, 3}, HE Hongxiang¹, XU Weiguo^{1, 2}, LIU Jianguo¹, QIN Ye¹, YANG Jiazhen^{1, 2}, XU Qian³, YAN Chuanwei¹

1 Institute of Metal Research of CAS, Shenyang 110016, Liaoning, China;
2 School of Chemistry of Liaoning University, Shenyang 110036, Liaoning, China;
3 School of Materials and Metallurgy of Northeastern University, Shenyang 110819, Liaoning, China

Received:2015-08-12 Online:2015-10-19 Published:2015-10-19

摘要/Abstract

摘要： 全钒氧化还原液流电池被认为是满足风能、太阳能等新能源最有可行性的大规模储能技术之一。钒电池电解液既是导电介质又是能量存储的关键材料,是钒电池储能与能量转化的核心。对钒电池电解液热力学性质的研究,有助于深入认识溶液的本质特性,对钒电池的容量、能量密度以及系统稳定性的提高均具有极大意义。采用电导法测量了温度范围在278.15~318.15 K,不同浓度的V(Ⅴ)硫酸水溶液三元体系的电导率,通过多项式拟合及外推法,将V(Ⅴ)+H₂SO₄+H₂O三元体系的电导率外推得到V(Ⅴ)水溶液二元体系电导率,并计算了离子的极限摩尔电导率、Stocks半径、迁移数、扩散系数和溶液电导活化能等参数并讨论了浓度、温度对这些性质的影响规律。

关键词: 钒电池, 电解液, 电导率, 热力学参数

Abstract: As one of the most feasible large scale energy storage technology of electrical energy, vanadium redox flow battery has been combined with non-continuous renewable power sources such as solar or wind power. In the VFB, the electrolyte is one of the most important components. It is not only the conductor of the ions but also the energy-store medium. The research on thermodynamics of the electrolyte will be of great value to having an adequate understanding of the nature of the electrolyte for providing clues to optimize the overall performance of the VFB. The conductivities of aqueous solution V(Ⅴ) sulfuric acid with various molalities are measured in the temperature range of 278.15~318.15 K. The conductivities of V(Ⅴ) +H₂SO₄+H₂O ternary system was analyzed and the conductivities binary system V(Ⅴ) aqueous solution was obtained by extrapolation, the effects of concentration and temperature on the ionic limiting molar conductivity, stocks radius, the transport number, diffusion coefficient and conductance activation energy were studied and discussed.

Key words: vanadium battery, electrolyte, conductivity, thermodynamic parameter

中图分类号:

TM911

李享容, 何虹祥, 许维国, 刘建国, 秦野, 杨家振, 许茜, 严川伟. 钒电池五价钒溶液的电导性质[J]. 储能科学与技术, 2015, 4(5): 498-505.

LI Xiangrong, HE Hongxiang, XU Weiguo, LIU Jianguo, QIN Ye, YANG Jiazhen, XU Qian, YAN Chuanwei. Study on the conductivities of V(Ⅴ) solution of vanadium flow battery[J]. Energy Storage Science and Technology, 2015, 4(5): 498-505.

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钒电池五价钒溶液的电导性质

Study on the conductivities of V(Ⅴ) solution of vanadium flow battery

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