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A Review of Electrolyte Additives in Vanadium Redox Flow Batteries

Vanadium redox flow batteries (VRFBs) are promising candidates for large-scale energy storage, and the electrolyte plays a critical role in chemical–electrical energy conversion. However, the operating temperature of VRFBs is limited to 10–40 °C because of the stability of the electrolyte. To overco...

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Autores principales: Tian, Wenxin, Du, Hao, Wang, Jianzhang, Weigand, Jan J., Qi, Jian, Wang, Shaona, Li, Lanjie
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10342886/
https://www.ncbi.nlm.nih.gov/pubmed/37444896
http://dx.doi.org/10.3390/ma16134582
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author Tian, Wenxin
Du, Hao
Wang, Jianzhang
Weigand, Jan J.
Qi, Jian
Wang, Shaona
Li, Lanjie
author_facet Tian, Wenxin
Du, Hao
Wang, Jianzhang
Weigand, Jan J.
Qi, Jian
Wang, Shaona
Li, Lanjie
author_sort Tian, Wenxin
collection PubMed
description Vanadium redox flow batteries (VRFBs) are promising candidates for large-scale energy storage, and the electrolyte plays a critical role in chemical–electrical energy conversion. However, the operating temperature of VRFBs is limited to 10–40 °C because of the stability of the electrolyte. To overcome this, various chemical species are added, but the progress and mechanism have not been summarized and discussed yet. This review summarizes research progress on electrolyte additives that are used for different purposes or systems in the operation of VRFBs, including stabilizing agents (SAs) and electrochemical mass transfer enhancers (EMTEs). Additives in vanadium electrolytes that exhibit microscopic stabilizing mechanisms and electrochemical enhancing mechanisms, including complexation, electrostatic repulsion, growth inhibition, and modifying electrodes, are also discussed, including inorganic, organic, and complex. In the end, the prospects and challenges associated with the side effects of additives in VRFBs are presented, aiming to provide a theoretical and comprehensive reference for researchers to design a higher-performance electrolyte for VRFBs.
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spelling pubmed-103428862023-07-14 A Review of Electrolyte Additives in Vanadium Redox Flow Batteries Tian, Wenxin Du, Hao Wang, Jianzhang Weigand, Jan J. Qi, Jian Wang, Shaona Li, Lanjie Materials (Basel) Review Vanadium redox flow batteries (VRFBs) are promising candidates for large-scale energy storage, and the electrolyte plays a critical role in chemical–electrical energy conversion. However, the operating temperature of VRFBs is limited to 10–40 °C because of the stability of the electrolyte. To overcome this, various chemical species are added, but the progress and mechanism have not been summarized and discussed yet. This review summarizes research progress on electrolyte additives that are used for different purposes or systems in the operation of VRFBs, including stabilizing agents (SAs) and electrochemical mass transfer enhancers (EMTEs). Additives in vanadium electrolytes that exhibit microscopic stabilizing mechanisms and electrochemical enhancing mechanisms, including complexation, electrostatic repulsion, growth inhibition, and modifying electrodes, are also discussed, including inorganic, organic, and complex. In the end, the prospects and challenges associated with the side effects of additives in VRFBs are presented, aiming to provide a theoretical and comprehensive reference for researchers to design a higher-performance electrolyte for VRFBs. MDPI 2023-06-25 /pmc/articles/PMC10342886/ /pubmed/37444896 http://dx.doi.org/10.3390/ma16134582 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Review
Tian, Wenxin
Du, Hao
Wang, Jianzhang
Weigand, Jan J.
Qi, Jian
Wang, Shaona
Li, Lanjie
A Review of Electrolyte Additives in Vanadium Redox Flow Batteries
title A Review of Electrolyte Additives in Vanadium Redox Flow Batteries
title_full A Review of Electrolyte Additives in Vanadium Redox Flow Batteries
title_fullStr A Review of Electrolyte Additives in Vanadium Redox Flow Batteries
title_full_unstemmed A Review of Electrolyte Additives in Vanadium Redox Flow Batteries
title_short A Review of Electrolyte Additives in Vanadium Redox Flow Batteries
title_sort review of electrolyte additives in vanadium redox flow batteries
topic Review
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10342886/
https://www.ncbi.nlm.nih.gov/pubmed/37444896
http://dx.doi.org/10.3390/ma16134582
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