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

doi:10.1016/j.jpowsour.2019.227503

CORC > 金属研究所 > 中国科学院金属研究所

	Electrolyte transfer mechanism and optimization strategy for vanadium flow batteries adopting a Nafion membrane
	Song, Yuxi 1,2,3; Li, Xiangrong 3; Xiong, Jing 1,3; Yang, Linlin 4; Pan, Guoliang 4; Yan, Chuanwei 1,3; Tang, Ao 1,3
刊名	JOURNAL OF POWER SOURCES
	2020-02-15
卷号	449 页码:9
关键词	Vanadium flow battery Electrolyte transfer Volume imbalance Electrolyte viscosity Flow optimization
ISSN号	0378-7753
DOI	10.1016/j.jpowsour.2019.227503
通讯作者	Tang, Ao(a.tang@imr.ac.cn)
英文摘要	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.
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
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000510947000040
资助机构	National Natural Science Foundation of China ; Shenyang key R & D and technology transfer program ; Institute of Metal Research, Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/137197]
专题	金属研究所_中国科学院金属研究所
通讯作者	Tang, Ao
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang, Peoples R China 2.Univ Sci & Technol China, Nano Sci & Technol Inst, Suzhou, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang, 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.