Electrolyte transfer mechanism and optimization strategy for vanadium flow batteries adopting a Nafion membrane

doi:10.1016/j.jpowsour.2019.227503

IMR OpenIR

	Electrolyte transfer mechanism and optimization strategy for vanadium flow batteries adopting a Nafion membrane
	Song, Yuxi 1,2,3; Li, Xiangrong 1; Xiong, Jing 1,2; Yang, Linlin 4; Pan, Guoliang 4; Yan, Chuanwei 1,2; Tang, Ao 1,2
通讯作者	Tang, Ao(a.tang@imr.ac.cn)
	2020-02-15
发表期刊	JOURNAL OF POWER SOURCES
ISSN	0378-7753
卷号	449 页码:9
摘要	In vanadium flow batteries, electrolyte transfer across the membrane can lead to a volumetric imbalance between the two half-cell electrolytes and a subsequent loss of available capacity. However, the transfer mechanism has not been comprehensively understood and this lack of knowledge has significantly limited long-term discharge capacity and stability of the vanadium flow battery. To overcome this issue, the electrolyte transfer mechanism is systematically developed in this study by analyzing the pressure drop across the membrane in accordance with Darcy's law and further validated by experiments. The experimental results show that the viscosity difference between the two half-cell electrolytes contributes greatly to the electrolyte transfer from negative half-cell to positive half-cell, while a large flow rate applied to both half-cells may also exacerbate the electrolyte transfer. Moreover, further experiments also demonstrate that the electrolyte transfer in continuous charge-discharge operation can be effectively suppressed by optimizing the flow rates based on viscosity measurements, which subsequently yields a notable improvement in discharge capacity. Revealing the electrolyte transfer mechanism is not only beneficial to enhancing long-term performance and stability of the vanadium flow battery, but also highly valued for understanding the transport phenomena in other flow battery systems.
关键词	Vanadium flow battery Electrolyte transfer Volume imbalance Electrolyte viscosity Flow optimization
资助者	National Natural Science Foundation of China ; Shenyang key R & D and technology transfer program ; Institute of Metal Research, Chinese Academy of Sciences
DOI	10.1016/j.jpowsour.2019.227503
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[21706266] ; National Natural Science Foundation of China[21805290] ; Shenyang key R & D and technology transfer program[Z17-7-026] ; Institute of Metal Research, Chinese Academy of Sciences
WOS研究方向	Chemistry ; Electrochemistry ; Energy & Fuels ; Materials Science
WOS类目	Chemistry, Physical ; Electrochemistry ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS记录号	WOS:000510947000040
出版者	ELSEVIER
引用统计	被引频次：44[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/137195
专题	中国科学院金属研究所
通讯作者	Tang, Ao
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang, Peoples R China 3.Univ Sci & Technol China, Nano Sci & Technol Inst, Suzhou, Peoples R China 4.Shanghai Elect Grp Co Ltd, Cent Acad, Shanghai, Peoples R China
推荐引用方式 GB/T 7714	Song, Yuxi,Li, Xiangrong,Xiong, Jing,et al. Electrolyte transfer mechanism and optimization strategy for vanadium flow batteries adopting a Nafion membrane[J]. JOURNAL OF POWER SOURCES,2020,449:9.
APA	Song, Yuxi.,Li, Xiangrong.,Xiong, Jing.,Yang, Linlin.,Pan, Guoliang.,...&Tang, Ao.(2020).Electrolyte transfer mechanism and optimization strategy for vanadium flow batteries adopting a Nafion membrane.JOURNAL OF POWER SOURCES,449,9.
MLA	Song, Yuxi,et al."Electrolyte transfer mechanism and optimization strategy for vanadium flow batteries adopting a Nafion membrane".JOURNAL OF POWER SOURCES 449(2020):9.