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Unveiling electrode compression impact on vanadium flow battery from polarization perspective via a symmetric cell configuration
Zhang, Kaiyue; Yan, Chuanwei; Tang, Ao
2020-12-15
Source PublicationJOURNAL OF POWER SOURCES
Volume479
AbstractFull commercialization of vanadium flow batteries requires a high current density operation. However, this can be only realized when associated large polarizations of the cell are properly reduced. Of all the cell components, the porous electrode plays a critical role in determining cell polarizations since it directly relates to each of the polarizations. Despite that, an in-depth understanding of electrode compression impact on polarizations of a flow cell is still limited in literature. In this work, a quantitatively experimental study to unveil the electrode compression impact on each of the polarizations as well as the performance of a vanadium flow cell is conducted by employing a symmetric cell configuration. Four different compression ratios are investigated by both ex-situ characterizations and in-situ symmetric cell tests, which successfully reveal its influence on activation, ohmic and concentration polarizations at varied operating current densities. Charge-discharge cycling tests further prove the significance of electrode compression to both efficiency and discharge capacity, while also delivering an optimal compression ratio for the investigated flow cell. Such a quantitative analysis not only promotes a deep understanding of the importance of electrode compression to cell performance, but is also of vital importance for stack design and optimization in practice.
DOI10.1016/j.jpowsour.2020.228816
WOS IDWOS:000593843100005
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/155642
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Zhang, Kaiyue,Yan, Chuanwei,Tang, Ao. Unveiling electrode compression impact on vanadium flow battery from polarization perspective via a symmetric cell configuration[J]. JOURNAL OF POWER SOURCES,2020,479.
APA Zhang, Kaiyue,Yan, Chuanwei,&Tang, Ao.(2020).Unveiling electrode compression impact on vanadium flow battery from polarization perspective via a symmetric cell configuration.JOURNAL OF POWER SOURCES,479.
MLA Zhang, Kaiyue,et al."Unveiling electrode compression impact on vanadium flow battery from polarization perspective via a symmetric cell configuration".JOURNAL OF POWER SOURCES 479(2020).
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