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Single-dispersed polyoxometalate clusters embedded on multilayer graphene as a bifunctional electrocatalyst for efficient Li-S batteries

The redox reactions occurring in the Li-S battery positive electrode conceal various and critical electrocatalytic processes, which strongly influence the performances of this electrochemical energy storage system. Here, we report the development of a single-dispersed molecular cluster catalyst comp...

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Autores principales: Lei, Jie, Fan, Xiao-Xiang, Liu, Ting, Xu, Pan, Hou, Qing, Li, Ke, Yuan, Ru-Ming, Zheng, Ming-Sen, Dong, Quan-Feng, Chen, Jia-Jia
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8752791/
https://www.ncbi.nlm.nih.gov/pubmed/35017484
http://dx.doi.org/10.1038/s41467-021-27866-5
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author Lei, Jie
Fan, Xiao-Xiang
Liu, Ting
Xu, Pan
Hou, Qing
Li, Ke
Yuan, Ru-Ming
Zheng, Ming-Sen
Dong, Quan-Feng
Chen, Jia-Jia
author_facet Lei, Jie
Fan, Xiao-Xiang
Liu, Ting
Xu, Pan
Hou, Qing
Li, Ke
Yuan, Ru-Ming
Zheng, Ming-Sen
Dong, Quan-Feng
Chen, Jia-Jia
author_sort Lei, Jie
collection PubMed
description The redox reactions occurring in the Li-S battery positive electrode conceal various and critical electrocatalytic processes, which strongly influence the performances of this electrochemical energy storage system. Here, we report the development of a single-dispersed molecular cluster catalyst composite comprising of a polyoxometalate framework ([Co(4)(PW(9)O(34))(2)](10−)) and multilayer reduced graphene oxide. Due to the interfacial charge transfer and exposure of unsaturated cobalt sites, the composite demonstrates efficient polysulfides adsorption and reduced activation energy for polysulfides conversion, thus serving as a bifunctional electrocatalyst. When tested in full Li-S coin cell configuration, the composite allows for a long-term Li-S battery cycling with a capacity fading of 0.015% per cycle after 1000 cycles at 2 C (i.e., 3.36 A g(−1)). An areal capacity of 4.55 mAh cm(−2) is also achieved with a sulfur loading of 5.6 mg cm(−)(2) and E/S ratio of 4.5 μL mg(−1). Moreover, Li-S single-electrode pouch cells tested with the bifunctional electrocatalyst demonstrate a specific capacity of about 800 mAh g(−1) at a sulfur loading of 3.6 mg cm(−2) for 100 cycles at 0.2 C (i.e., 336 mA g(−1)) with E/S ratio of 5 μL mg(−1).
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spelling pubmed-87527912022-01-20 Single-dispersed polyoxometalate clusters embedded on multilayer graphene as a bifunctional electrocatalyst for efficient Li-S batteries Lei, Jie Fan, Xiao-Xiang Liu, Ting Xu, Pan Hou, Qing Li, Ke Yuan, Ru-Ming Zheng, Ming-Sen Dong, Quan-Feng Chen, Jia-Jia Nat Commun Article The redox reactions occurring in the Li-S battery positive electrode conceal various and critical electrocatalytic processes, which strongly influence the performances of this electrochemical energy storage system. Here, we report the development of a single-dispersed molecular cluster catalyst composite comprising of a polyoxometalate framework ([Co(4)(PW(9)O(34))(2)](10−)) and multilayer reduced graphene oxide. Due to the interfacial charge transfer and exposure of unsaturated cobalt sites, the composite demonstrates efficient polysulfides adsorption and reduced activation energy for polysulfides conversion, thus serving as a bifunctional electrocatalyst. When tested in full Li-S coin cell configuration, the composite allows for a long-term Li-S battery cycling with a capacity fading of 0.015% per cycle after 1000 cycles at 2 C (i.e., 3.36 A g(−1)). An areal capacity of 4.55 mAh cm(−2) is also achieved with a sulfur loading of 5.6 mg cm(−)(2) and E/S ratio of 4.5 μL mg(−1). Moreover, Li-S single-electrode pouch cells tested with the bifunctional electrocatalyst demonstrate a specific capacity of about 800 mAh g(−1) at a sulfur loading of 3.6 mg cm(−2) for 100 cycles at 0.2 C (i.e., 336 mA g(−1)) with E/S ratio of 5 μL mg(−1). Nature Publishing Group UK 2022-01-11 /pmc/articles/PMC8752791/ /pubmed/35017484 http://dx.doi.org/10.1038/s41467-021-27866-5 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Lei, Jie
Fan, Xiao-Xiang
Liu, Ting
Xu, Pan
Hou, Qing
Li, Ke
Yuan, Ru-Ming
Zheng, Ming-Sen
Dong, Quan-Feng
Chen, Jia-Jia
Single-dispersed polyoxometalate clusters embedded on multilayer graphene as a bifunctional electrocatalyst for efficient Li-S batteries
title Single-dispersed polyoxometalate clusters embedded on multilayer graphene as a bifunctional electrocatalyst for efficient Li-S batteries
title_full Single-dispersed polyoxometalate clusters embedded on multilayer graphene as a bifunctional electrocatalyst for efficient Li-S batteries
title_fullStr Single-dispersed polyoxometalate clusters embedded on multilayer graphene as a bifunctional electrocatalyst for efficient Li-S batteries
title_full_unstemmed Single-dispersed polyoxometalate clusters embedded on multilayer graphene as a bifunctional electrocatalyst for efficient Li-S batteries
title_short Single-dispersed polyoxometalate clusters embedded on multilayer graphene as a bifunctional electrocatalyst for efficient Li-S batteries
title_sort single-dispersed polyoxometalate clusters embedded on multilayer graphene as a bifunctional electrocatalyst for efficient li-s batteries
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8752791/
https://www.ncbi.nlm.nih.gov/pubmed/35017484
http://dx.doi.org/10.1038/s41467-021-27866-5
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