中文版 | English
Title

An Electrolyte with Elevated Average Valence for Suppressing the Capacity Decay of Vanadium Redox Flow Batteries

Author
Corresponding AuthorFan, Xinzhuang; Zhao, Tianshou
Publication Years
2022-12-01
DOI
Source Title
ISSN
2374-7943
EISSN
2374-7951
Abstract
Nafion series membranes are widely used in vanadium redox flow batteries (VRFBs). However, the poor ion selectivity of the membranes to vanadium ions, especially for V2+, results in a rapid capacity decay during cycling. Although tremendous efforts have been made to improve the membrane's ion selectivity, increasing the ion selectivity without sacrificing the proton conductivity is still a challenging issue. In this work, instead of focusing on enhancing the membranes' ion selectivity, we develop an efficient valence regulation strategy to suppress the capacity decay caused by the crossover of V2+ in VRFBs. Despite the discharge capacity of the VRFB with the elevated average valence electrolytes (V3.68+) being slightly lower than that with commercial electrolytes (V3.50+) in the first 35 cycles, the accumulated discharge capacity in 400 cycles is improved by 52.33%. Moreover, this method is efficient, is easy to scale up, and provides deep insights into the capacity decay mechanism of VRFBs.
URL[Source Record]
Indexed By
Language
English
SUSTech Authorship
Corresponding
Funding Project
Shenzhen-Hong Kong-Macao Science and Technology Program (Category C)[SGDX2020110309460000] ; Natural Science Foundation of Guangdong Province[2021A1515011821]
WOS Research Area
Chemistry
WOS Subject
Chemistry, Multidisciplinary
WOS Accession No
WOS:000905338200001
Publisher
Data Source
Web of Science
Citation statistics
Cited Times [WOS]:3
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/424728
DepartmentDepartment of Mechanical and Energy Engineering
Affiliation
1.Hong Kong Univ Sci & Technol, Dept Mech & Aerosp Engn, Kowloon, Hong Kong 999077, Peoples R China
2.Southern Univ Sci & Technol, Dept Mech & Energy Engn, Shenzhen 518055, Peoples R China
Corresponding Author AffilicationDepartment of Mechanical and Energy Engineering
Recommended Citation
GB/T 7714
Wang, Zhenyu,Guo, Zixiao,Ren, Jiayou,et al. An Electrolyte with Elevated Average Valence for Suppressing the Capacity Decay of Vanadium Redox Flow Batteries[J]. ACS Central Science,2022.
APA
Wang, Zhenyu.,Guo, Zixiao.,Ren, Jiayou.,Li, Yiju.,Liu, Bin.,...&Zhao, Tianshou.(2022).An Electrolyte with Elevated Average Valence for Suppressing the Capacity Decay of Vanadium Redox Flow Batteries.ACS Central Science.
MLA
Wang, Zhenyu,et al."An Electrolyte with Elevated Average Valence for Suppressing the Capacity Decay of Vanadium Redox Flow Batteries".ACS Central Science (2022).
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