| Electrolyte transfer mechanism and optimization strategy for vanadium flow batteries adopting a Nafion membrane | |
| Song, Yuxi1,2,3; Li, Xiangrong1; Xiong, Jing1,2; Yang, Linlin4; Pan, Guoliang4; Yan, Chuanwei1,2; Tang, Ao1,2 | |
| Corresponding Author | Tang, Ao(a.tang@imr.ac.cn) |
| 2020-02-15 | |
| Source Publication | JOURNAL OF POWER SOURCES
 |
| ISSN | 0378-7753 |
| Volume | 449Pages:9 |
| Abstract | 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. |
| Keyword | Vanadium flow battery Electrolyte transfer Volume imbalance Electrolyte viscosity Flow optimization |
| Funding Organization | 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 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 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 Research Area | Chemistry ; Electrochemistry ; Energy & Fuels ; Materials Science |
| WOS Subject | Chemistry, Physical ; Electrochemistry ; Energy & Fuels ; Materials Science, Multidisciplinary |
| WOS ID | WOS:000510947000040 |
| Publisher | ELSEVIER |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/137198 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Tang, Ao |
| Affiliation | 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 |
| 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,2020,449:9. |
| 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. |
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