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Electrolyte transfer mechanism and optimization strategy for vanadium flow batteries adopting a Nafion membrane
Song, Yuxi; Li, Xiangrong; Xiong, Jing; Yang, Linlin; Pan, Guoliang; Yan, Chuanwei; Tang, Ao
2020-02-15
Source PublicationJOURNAL OF POWER SOURCES
Volume449
AbstractIn 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.
DOI10.1016/j.jpowsour.2019.227503
WOS IDWOS:000510947000040
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/83133
Collection中国科学院金属研究所
Recommended Citation
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.
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.
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).
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