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Highly branched amylopectin binder for sulfur cathodes with enhanced performance and longevity

The sulfur cathode of lithium‐sulfur (Li‐S) batteries suffers from inherent problems of insufficient mechanical strength and the dissolution of sulfur and polysulfides. Inspired by the extraordinarily resilient and strong binding force of the Great Wall binder, that is, the sticky rice mortar, we ex...

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Autores principales: Hencz, Luke, Chen, Hao, Wu, Zhenzhen, Qian, Shangshu, Chen, Su, Gu, Xingxing, Liu, Xianhu, Yan, Cheng, Zhang, Shanqing
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10190977/
https://www.ncbi.nlm.nih.gov/pubmed/37324579
http://dx.doi.org/10.1002/EXP.20210131
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author Hencz, Luke
Chen, Hao
Wu, Zhenzhen
Qian, Shangshu
Chen, Su
Gu, Xingxing
Liu, Xianhu
Yan, Cheng
Zhang, Shanqing
author_facet Hencz, Luke
Chen, Hao
Wu, Zhenzhen
Qian, Shangshu
Chen, Su
Gu, Xingxing
Liu, Xianhu
Yan, Cheng
Zhang, Shanqing
author_sort Hencz, Luke
collection PubMed
description The sulfur cathode of lithium‐sulfur (Li‐S) batteries suffers from inherent problems of insufficient mechanical strength and the dissolution of sulfur and polysulfides. Inspired by the extraordinarily resilient and strong binding force of the Great Wall binder, that is, the sticky rice mortar, we extracted highly branched amylopectin (HBA), the effective ingredient, as a low‐cost, nontoxic and environmentally benign aqueous binder for the sulfur cathode. The HBA‐based cells outperform the Li‐S batteries based on the traditional polyvinyldene diflouride (PVDF) binder and a lowly branched polysaccharide binder. The improved electrochemical performance in the HBA‐based cell could be attributed to two mechanisms. First, the branched structure of the HBA provides enhanced mechanical and adhesive properties, which allow for a robust electronic and ionic conductive framework to be maintained throughout the cathode after extended cycling. Second, the HBA shows enhanced polysulfide retention due to the polymer's abundant lone‐pair rich hydroxyl groups and the formation of C─S bonds between the HBA and polysulfides prohibits the shuttle effect of polysulfides. The improved mechanical properties and polysulfide retention function of the HBA binder facilitate the HBA‐based Li‐S battery to deliver a long cycle life of 500 cycles at 2 C while only displaying a capacity fading of 0.104% per cycle.
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spelling pubmed-101909772023-06-14 Highly branched amylopectin binder for sulfur cathodes with enhanced performance and longevity Hencz, Luke Chen, Hao Wu, Zhenzhen Qian, Shangshu Chen, Su Gu, Xingxing Liu, Xianhu Yan, Cheng Zhang, Shanqing Exploration (Beijing) Research Articles The sulfur cathode of lithium‐sulfur (Li‐S) batteries suffers from inherent problems of insufficient mechanical strength and the dissolution of sulfur and polysulfides. Inspired by the extraordinarily resilient and strong binding force of the Great Wall binder, that is, the sticky rice mortar, we extracted highly branched amylopectin (HBA), the effective ingredient, as a low‐cost, nontoxic and environmentally benign aqueous binder for the sulfur cathode. The HBA‐based cells outperform the Li‐S batteries based on the traditional polyvinyldene diflouride (PVDF) binder and a lowly branched polysaccharide binder. The improved electrochemical performance in the HBA‐based cell could be attributed to two mechanisms. First, the branched structure of the HBA provides enhanced mechanical and adhesive properties, which allow for a robust electronic and ionic conductive framework to be maintained throughout the cathode after extended cycling. Second, the HBA shows enhanced polysulfide retention due to the polymer's abundant lone‐pair rich hydroxyl groups and the formation of C─S bonds between the HBA and polysulfides prohibits the shuttle effect of polysulfides. The improved mechanical properties and polysulfide retention function of the HBA binder facilitate the HBA‐based Li‐S battery to deliver a long cycle life of 500 cycles at 2 C while only displaying a capacity fading of 0.104% per cycle. John Wiley and Sons Inc. 2022-01-24 /pmc/articles/PMC10190977/ /pubmed/37324579 http://dx.doi.org/10.1002/EXP.20210131 Text en © 2022 The Authors. Exploration published by Henan University and John Wiley & Sons Australia, Ltd. https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Articles
Hencz, Luke
Chen, Hao
Wu, Zhenzhen
Qian, Shangshu
Chen, Su
Gu, Xingxing
Liu, Xianhu
Yan, Cheng
Zhang, Shanqing
Highly branched amylopectin binder for sulfur cathodes with enhanced performance and longevity
title Highly branched amylopectin binder for sulfur cathodes with enhanced performance and longevity
title_full Highly branched amylopectin binder for sulfur cathodes with enhanced performance and longevity
title_fullStr Highly branched amylopectin binder for sulfur cathodes with enhanced performance and longevity
title_full_unstemmed Highly branched amylopectin binder for sulfur cathodes with enhanced performance and longevity
title_short Highly branched amylopectin binder for sulfur cathodes with enhanced performance and longevity
title_sort highly branched amylopectin binder for sulfur cathodes with enhanced performance and longevity
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10190977/
https://www.ncbi.nlm.nih.gov/pubmed/37324579
http://dx.doi.org/10.1002/EXP.20210131
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