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Fabricating Heterostructures for Boosting the Structure Stability of Li-Rich Cathodes

[Image: see text] Li-rich Mn-based oxides are regarded as the most promising new-generation cathode materials, but their practical application is greatly hindered by structure collapse and capacity degradation. Herein, a rock salt phase is epitaxially constructed on the surface of Li-rich Mn-based c...

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Autores principales: Li, Yao, Zhao, Qing, Zhang, Mengke, Qiu, Lang, Zheng, Zhuo, Liu, Yang, Sun, Yan, Zhong, Benhe, Song, Yang, Guo, Xiaodong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2023
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9948178/
https://www.ncbi.nlm.nih.gov/pubmed/36844563
http://dx.doi.org/10.1021/acsomega.2c07313
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author Li, Yao
Zhao, Qing
Zhang, Mengke
Qiu, Lang
Zheng, Zhuo
Liu, Yang
Sun, Yan
Zhong, Benhe
Song, Yang
Guo, Xiaodong
author_facet Li, Yao
Zhao, Qing
Zhang, Mengke
Qiu, Lang
Zheng, Zhuo
Liu, Yang
Sun, Yan
Zhong, Benhe
Song, Yang
Guo, Xiaodong
author_sort Li, Yao
collection PubMed
description [Image: see text] Li-rich Mn-based oxides are regarded as the most promising new-generation cathode materials, but their practical application is greatly hindered by structure collapse and capacity degradation. Herein, a rock salt phase is epitaxially constructed on the surface of Li-rich Mn-based cathodes through Mo doping to improve their structural stability. The heterogeneous structure composed of a rock salt phase and layered phase is induced by Mo(6+) enriched on the particle surface, and the strong Mo–O bonding can enhance the TM–O covalence. Therefore, it can stabilize lattice oxygen and inhibit the side reaction of the interface and structural phase transition. The discharge capacity of 2% Mo-doped samples (Mo 2%) displays 279.67 mA h g(–1) at 0.1 C (vs 254.39 mA h g(–1) (pristine)), and the discharge capacity retention rate of Mo 2% is 79.4% after 300 cycles at 5 C (vs 47.6% (pristine)).
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spelling pubmed-99481782023-02-24 Fabricating Heterostructures for Boosting the Structure Stability of Li-Rich Cathodes Li, Yao Zhao, Qing Zhang, Mengke Qiu, Lang Zheng, Zhuo Liu, Yang Sun, Yan Zhong, Benhe Song, Yang Guo, Xiaodong ACS Omega [Image: see text] Li-rich Mn-based oxides are regarded as the most promising new-generation cathode materials, but their practical application is greatly hindered by structure collapse and capacity degradation. Herein, a rock salt phase is epitaxially constructed on the surface of Li-rich Mn-based cathodes through Mo doping to improve their structural stability. The heterogeneous structure composed of a rock salt phase and layered phase is induced by Mo(6+) enriched on the particle surface, and the strong Mo–O bonding can enhance the TM–O covalence. Therefore, it can stabilize lattice oxygen and inhibit the side reaction of the interface and structural phase transition. The discharge capacity of 2% Mo-doped samples (Mo 2%) displays 279.67 mA h g(–1) at 0.1 C (vs 254.39 mA h g(–1) (pristine)), and the discharge capacity retention rate of Mo 2% is 79.4% after 300 cycles at 5 C (vs 47.6% (pristine)). American Chemical Society 2023-02-13 /pmc/articles/PMC9948178/ /pubmed/36844563 http://dx.doi.org/10.1021/acsomega.2c07313 Text en © 2023 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Li, Yao
Zhao, Qing
Zhang, Mengke
Qiu, Lang
Zheng, Zhuo
Liu, Yang
Sun, Yan
Zhong, Benhe
Song, Yang
Guo, Xiaodong
Fabricating Heterostructures for Boosting the Structure Stability of Li-Rich Cathodes
title Fabricating Heterostructures for Boosting the Structure Stability of Li-Rich Cathodes
title_full Fabricating Heterostructures for Boosting the Structure Stability of Li-Rich Cathodes
title_fullStr Fabricating Heterostructures for Boosting the Structure Stability of Li-Rich Cathodes
title_full_unstemmed Fabricating Heterostructures for Boosting the Structure Stability of Li-Rich Cathodes
title_short Fabricating Heterostructures for Boosting the Structure Stability of Li-Rich Cathodes
title_sort fabricating heterostructures for boosting the structure stability of li-rich cathodes
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9948178/
https://www.ncbi.nlm.nih.gov/pubmed/36844563
http://dx.doi.org/10.1021/acsomega.2c07313
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