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Anomalous metal segregation in lithium-rich material provides design rules for stable cathode in lithium-ion battery

Despite the importance of studying the instability of delithiated cathode materials, it remains difficult to underpin the degradation mechanism of lithium-rich cathode materials due to the complication of combined chemical and structural evolutions. Herein, we use state-of-the-art electron microscop...

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Autores principales: Lin, Ruoqian, Hu, Enyuan, Liu, Mingjie, Wang, Yi, Cheng, Hao, Wu, Jinpeng, Zheng, Jin-Cheng, Wu, Qin, Bak, Seongmin, Tong, Xiao, Zhang, Rui, Yang, Wanli, Persson, Kristin A., Yu, Xiqian, Yang, Xiao-Qing, Xin, Huolin L.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6456622/
https://www.ncbi.nlm.nih.gov/pubmed/30967531
http://dx.doi.org/10.1038/s41467-019-09248-0
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author Lin, Ruoqian
Hu, Enyuan
Liu, Mingjie
Wang, Yi
Cheng, Hao
Wu, Jinpeng
Zheng, Jin-Cheng
Wu, Qin
Bak, Seongmin
Tong, Xiao
Zhang, Rui
Yang, Wanli
Persson, Kristin A.
Yu, Xiqian
Yang, Xiao-Qing
Xin, Huolin L.
author_facet Lin, Ruoqian
Hu, Enyuan
Liu, Mingjie
Wang, Yi
Cheng, Hao
Wu, Jinpeng
Zheng, Jin-Cheng
Wu, Qin
Bak, Seongmin
Tong, Xiao
Zhang, Rui
Yang, Wanli
Persson, Kristin A.
Yu, Xiqian
Yang, Xiao-Qing
Xin, Huolin L.
author_sort Lin, Ruoqian
collection PubMed
description Despite the importance of studying the instability of delithiated cathode materials, it remains difficult to underpin the degradation mechanism of lithium-rich cathode materials due to the complication of combined chemical and structural evolutions. Herein, we use state-of-the-art electron microscopy tools, in conjunction with synchrotron X-ray techniques and first-principle calculations to study a 4d-element-containing compound, Li(2)Ru(0.5)Mn(0.5)O(3). We find surprisingly, after cycling, ruthenium segregates out as metallic nanoclusters on the reconstructed surface. Our calculations show that the unexpected ruthenium metal segregation is due to its thermodynamic insolubility in the oxygen deprived surface. This insolubility can disrupt the reconstructed surface, which explains the formation of a porous structure in this material. This work reveals the importance of studying the thermodynamic stability of the reconstructed film on the cathode materials and offers a theoretical guidance for choosing manganese substituting elements in lithium-rich as well as stoichiometric layer-layer compounds for stabilizing the cathode surface.
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spelling pubmed-64566222019-04-11 Anomalous metal segregation in lithium-rich material provides design rules for stable cathode in lithium-ion battery Lin, Ruoqian Hu, Enyuan Liu, Mingjie Wang, Yi Cheng, Hao Wu, Jinpeng Zheng, Jin-Cheng Wu, Qin Bak, Seongmin Tong, Xiao Zhang, Rui Yang, Wanli Persson, Kristin A. Yu, Xiqian Yang, Xiao-Qing Xin, Huolin L. Nat Commun Article Despite the importance of studying the instability of delithiated cathode materials, it remains difficult to underpin the degradation mechanism of lithium-rich cathode materials due to the complication of combined chemical and structural evolutions. Herein, we use state-of-the-art electron microscopy tools, in conjunction with synchrotron X-ray techniques and first-principle calculations to study a 4d-element-containing compound, Li(2)Ru(0.5)Mn(0.5)O(3). We find surprisingly, after cycling, ruthenium segregates out as metallic nanoclusters on the reconstructed surface. Our calculations show that the unexpected ruthenium metal segregation is due to its thermodynamic insolubility in the oxygen deprived surface. This insolubility can disrupt the reconstructed surface, which explains the formation of a porous structure in this material. This work reveals the importance of studying the thermodynamic stability of the reconstructed film on the cathode materials and offers a theoretical guidance for choosing manganese substituting elements in lithium-rich as well as stoichiometric layer-layer compounds for stabilizing the cathode surface. Nature Publishing Group UK 2019-04-09 /pmc/articles/PMC6456622/ /pubmed/30967531 http://dx.doi.org/10.1038/s41467-019-09248-0 Text en © The Author(s) 2019 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/.
spellingShingle Article
Lin, Ruoqian
Hu, Enyuan
Liu, Mingjie
Wang, Yi
Cheng, Hao
Wu, Jinpeng
Zheng, Jin-Cheng
Wu, Qin
Bak, Seongmin
Tong, Xiao
Zhang, Rui
Yang, Wanli
Persson, Kristin A.
Yu, Xiqian
Yang, Xiao-Qing
Xin, Huolin L.
Anomalous metal segregation in lithium-rich material provides design rules for stable cathode in lithium-ion battery
title Anomalous metal segregation in lithium-rich material provides design rules for stable cathode in lithium-ion battery
title_full Anomalous metal segregation in lithium-rich material provides design rules for stable cathode in lithium-ion battery
title_fullStr Anomalous metal segregation in lithium-rich material provides design rules for stable cathode in lithium-ion battery
title_full_unstemmed Anomalous metal segregation in lithium-rich material provides design rules for stable cathode in lithium-ion battery
title_short Anomalous metal segregation in lithium-rich material provides design rules for stable cathode in lithium-ion battery
title_sort anomalous metal segregation in lithium-rich material provides design rules for stable cathode in lithium-ion battery
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6456622/
https://www.ncbi.nlm.nih.gov/pubmed/30967531
http://dx.doi.org/10.1038/s41467-019-09248-0
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