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An environment-friendly crosslinked binder endowing LiFePO(4) electrode with structural integrity and long cycle life performance

Lithium iron phosphate (LiFePO(4)) is one of the most widely used cathode materials of lithium ion batteries. However, its commercial binder polyvinylidene fluoride (PVDF) is costly, less environmental-friendly and unstable during the long cycling process because of the weak van der Waals forces bet...

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Detalles Bibliográficos
Autores principales: Zhao, Lingzhu, Sun, Zhipeng, Zhang, Hongbing, Li, Yuli, Mo, Yan, Yu, Feng, Chen, Yong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9055956/
https://www.ncbi.nlm.nih.gov/pubmed/35521137
http://dx.doi.org/10.1039/d0ra05095d
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author Zhao, Lingzhu
Sun, Zhipeng
Zhang, Hongbing
Li, Yuli
Mo, Yan
Yu, Feng
Chen, Yong
author_facet Zhao, Lingzhu
Sun, Zhipeng
Zhang, Hongbing
Li, Yuli
Mo, Yan
Yu, Feng
Chen, Yong
author_sort Zhao, Lingzhu
collection PubMed
description Lithium iron phosphate (LiFePO(4)) is one of the most widely used cathode materials of lithium ion batteries. However, its commercial binder polyvinylidene fluoride (PVDF) is costly, less environmental-friendly and unstable during the long cycling process because of the weak van der Waals forces between the PVDF binder and electrode materials. Herein, an aqueous binder was designed using methacrylate-modified gelatin through UV photo-crosslinking. The crosslinked network and specific functional groups (carboxyl and amino) of the gelatin binder are superior in stabilizing the LiFePO(4) electrode structure during long cycles by mitigating the formation of cracks and suppressing the detachment of electrode materials from the Al current collector. The LiFePO(4) electrode with gelatin binder displays a high capacity of 140.3 mA h g(−1) with 90.1% retention after 300 cycles at 0.5C, which are both superior to that of the PVDF binder (only 114.4 mA h g(−1) and 74.8%). This work provides a promising binder to replace the commercial PVDF binder for practical application in energy storage systems.
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spelling pubmed-90559562022-05-04 An environment-friendly crosslinked binder endowing LiFePO(4) electrode with structural integrity and long cycle life performance Zhao, Lingzhu Sun, Zhipeng Zhang, Hongbing Li, Yuli Mo, Yan Yu, Feng Chen, Yong RSC Adv Chemistry Lithium iron phosphate (LiFePO(4)) is one of the most widely used cathode materials of lithium ion batteries. However, its commercial binder polyvinylidene fluoride (PVDF) is costly, less environmental-friendly and unstable during the long cycling process because of the weak van der Waals forces between the PVDF binder and electrode materials. Herein, an aqueous binder was designed using methacrylate-modified gelatin through UV photo-crosslinking. The crosslinked network and specific functional groups (carboxyl and amino) of the gelatin binder are superior in stabilizing the LiFePO(4) electrode structure during long cycles by mitigating the formation of cracks and suppressing the detachment of electrode materials from the Al current collector. The LiFePO(4) electrode with gelatin binder displays a high capacity of 140.3 mA h g(−1) with 90.1% retention after 300 cycles at 0.5C, which are both superior to that of the PVDF binder (only 114.4 mA h g(−1) and 74.8%). This work provides a promising binder to replace the commercial PVDF binder for practical application in energy storage systems. The Royal Society of Chemistry 2020-08-11 /pmc/articles/PMC9055956/ /pubmed/35521137 http://dx.doi.org/10.1039/d0ra05095d Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Zhao, Lingzhu
Sun, Zhipeng
Zhang, Hongbing
Li, Yuli
Mo, Yan
Yu, Feng
Chen, Yong
An environment-friendly crosslinked binder endowing LiFePO(4) electrode with structural integrity and long cycle life performance
title An environment-friendly crosslinked binder endowing LiFePO(4) electrode with structural integrity and long cycle life performance
title_full An environment-friendly crosslinked binder endowing LiFePO(4) electrode with structural integrity and long cycle life performance
title_fullStr An environment-friendly crosslinked binder endowing LiFePO(4) electrode with structural integrity and long cycle life performance
title_full_unstemmed An environment-friendly crosslinked binder endowing LiFePO(4) electrode with structural integrity and long cycle life performance
title_short An environment-friendly crosslinked binder endowing LiFePO(4) electrode with structural integrity and long cycle life performance
title_sort environment-friendly crosslinked binder endowing lifepo(4) electrode with structural integrity and long cycle life performance
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9055956/
https://www.ncbi.nlm.nih.gov/pubmed/35521137
http://dx.doi.org/10.1039/d0ra05095d
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