磁电复合场下正极钒离子的跨膜传质

doi:10.11949/j.issn.0438-1157.20160711

化工学报 ›› 2016, Vol. 67 ›› Issue (S1): 148-158.DOI: 10.11949/j.issn.0438-1157.20160711

磁电复合场下正极钒离子的跨膜传质

朱乐¹, 齐亮¹, 姚克俭¹, 谢晓峰²

1 浙江工业大学化学工程学院绿色化学合成技术国家重点实验室培育基地, 浙江杭州 310032;
2 清华大学核能与新能源技术研究所, 北京 100084

收稿日期:2016-05-24 修回日期:2016-05-29 出版日期:2016-08-31 发布日期:2016-08-31
通讯作者: 齐亮,姚克俭,qiliang@zjut.edu.cn;YAOKejian,yaokj@zjut.edu.cn
基金资助:
国家自然科学基金青年基金项目（21306170）。

Mass transfer of positive vanadium ions across cell membrane under magnetoelectric composite field

ZHU Le¹, QI Liang¹, YAO Kejian¹, XIE Xiaofeng²

1 State Key Laboratory Breed Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310032, Zhejiang, China;
2 Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China

Received:2016-05-24 Revised:2016-05-29 Online:2016-08-31 Published:2016-08-31
Supported by:
supported by the National Natural Science Foundation of China for the Youth (21306170).

摘要/Abstract

摘要：

探究了全钒液流电池在外加磁场、电场、磁电复合场下正极电解液中的钒离子在Nafion117膜上的跨膜传质过程，以及在磁电复合场下硫酸浓度和电解液添加剂对传质过程的影响。根据达西定律拟合得出相应的扩散传质系数。实验结果表明正向电场会加剧钒离子渗透，且当电场强度达到30 V·m^-1时渗透情况严重可达到无电场时的2.53倍。非匀强磁场的加入可明显降低钒离子的跨膜渗透性。且当外加磁场和电场复合场时，磁场对降低钒离子跨膜渗透的作用更加显著。实验还得出在不同的外加复合场中较高浓度硫酸有利于降低钒离子的跨膜渗透。此外丙三醇、木质素磺酸钠正极电解液添加剂的加入也降低了VO₂⁺的跨膜渗透性。

关键词: 全钒液流电池, 磁场, 复合场, 达西定律, 扩散传质系数

Abstract:

The mass transfer of positive vanadium ions across Nafion117 membrane within the magnetic field, electric field, and other additives complex field were studied. Diffusion coefficients were estimated based on experimental data based on the Darcy's Law. The results show that the forward electric field will increase the permeability of vanadium ions. The permeability within an electric field density was estimated to be 30 V·m^-1 which is 2.53 times as large as that without applied electric field. A non-uniform magnetic field can significantly help reduce the permeability of vanadium ions. When the non-uniform magnetic and electric fields are applied simultaneously, the effects of non-uniform magnetic field on the mass transfer are more noteble. A higher concentration of sulfuric acid solution contributes more to reduce the permeability of VOVO₂⁺. Permeability of VOVO₂⁺ are also decreased by mixing in glycerol, ligninsulfonate and other cathode electrolyte additives.

Key words: vanadium redox flow battery, magnetic field, complex field, Darcy’s law, diffusion coefficients

中图分类号:

TM911

朱乐, 齐亮, 姚克俭, 谢晓峰. 磁电复合场下正极钒离子的跨膜传质[J]. 化工学报, 2016, 67(S1): 148-158.

ZHU Le, QI Liang, YAO Kejian, XIE Xiaofeng. Mass transfer of positive vanadium ions across cell membrane under magnetoelectric composite field[J]. CIESC Journal, 2016, 67(S1): 148-158.

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磁电复合场下正极钒离子的跨膜传质

Mass transfer of positive vanadium ions across cell membrane under magnetoelectric composite field

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