Characterizations and selections of electrodes with optimal performance for large-scale vanadium redox flow batteries through lab-scale experiments

Wang，Zhenyu1; Ren，Jiayou1; Sun，Jing1; Guo，Zixiao1; Wei，Lei2; Fan，Xinzhuang1; Zhao，Tianshou1,2

2022-11-30

10.1016/j.jpowsour.2022.232094

JOURNAL OF POWER SOURCES   影响因子和分区

0378-7753

1873-2755

Conventionally, electrodes for vanadium redox flow batteries (VRFBs) are characterized in lab-scale single cells. However, electrodes selected in such a manner may not provide the best performance in practical large-scale battery stacks, as the flow rates and electrode compression ratios in large stacks are usually much lower than those in single cells. In this work, we study the essential effects of flow rates and electrode compression ratios on the characterizations and selections of electrodes for VRFBs. It is found that the working conditions-induced performance reversal is the reason that leads to the different results in the optimal electrodes between large-scale battery stacks and lab-scale single cells. Hence, the working condition should be considered when evaluating electrodes for VRFBs with lab-scale single cells, especially under low flow rate and compression ratio. This work provides valuable insight and guidance for electrode evaluation with lab-scale single cells, which promotes lab studies to engineering applications.

Lab-scale single cells Large-scale battery stacks Performance reversal Vanadium redox flow batteries Working conditions

SCI

英语

通讯

Natural Science Foundation of Guangdong Province[2021A1515011821];

Chemistry ; Electrochemistry ; Energy & Fuels ; Materials Science

Chemistry, Physical ; Electrochemistry ; Energy & Fuels ; Materials Science, Multidisciplinary

WOS:000864692900001

ELSEVIER

MATERIALS SCIENCE

2-s2.0-85138790839

Scopus

1.Department of Mechanical and Aerospace Engineering,The Hong Kong University of Science and Technology,Kowloon,Clear Water Bay,Hong Kong
2.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,Hong Kong

Wang，Zhenyu,Ren，Jiayou,Sun，Jing,et al. Characterizations and selections of electrodes with optimal performance for large-scale vanadium redox flow batteries through lab-scale experiments[J]. JOURNAL OF POWER SOURCES,2022,549.

Wang，Zhenyu.,Ren，Jiayou.,Sun，Jing.,Guo，Zixiao.,Wei，Lei.,...&Zhao，Tianshou.(2022).Characterizations and selections of electrodes with optimal performance for large-scale vanadium redox flow batteries through lab-scale experiments.JOURNAL OF POWER SOURCES,549.

Wang，Zhenyu,et al."Characterizations and selections of electrodes with optimal performance for large-scale vanadium redox flow batteries through lab-scale experiments".JOURNAL OF POWER SOURCES 549(2022).