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Chemical-state distributions in charged LiCoO(2) cathode particles visualized by soft X-ray spectromicroscopy

Lithium-ion deintercalation/intercalation during charge/discharge processes is one of the essential reactions that occur in the layered cathodes of lithium-ion batteries, and the performance of the cathode can be expressed as the sum of the reactions that occur in the local area of the individual ca...

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Autores principales: Zhang, Wenxiong, Hosono, Eiji, Asakura, Daisuke, Yuzawa, Hayato, Ohigashi, Takuji, Kobayashi, Masaki, Kiuchi, Hisao, Harada, Yoshihisa
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10030574/
https://www.ncbi.nlm.nih.gov/pubmed/36944681
http://dx.doi.org/10.1038/s41598-023-30673-1
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author Zhang, Wenxiong
Hosono, Eiji
Asakura, Daisuke
Yuzawa, Hayato
Ohigashi, Takuji
Kobayashi, Masaki
Kiuchi, Hisao
Harada, Yoshihisa
author_facet Zhang, Wenxiong
Hosono, Eiji
Asakura, Daisuke
Yuzawa, Hayato
Ohigashi, Takuji
Kobayashi, Masaki
Kiuchi, Hisao
Harada, Yoshihisa
author_sort Zhang, Wenxiong
collection PubMed
description Lithium-ion deintercalation/intercalation during charge/discharge processes is one of the essential reactions that occur in the layered cathodes of lithium-ion batteries, and the performance of the cathode can be expressed as the sum of the reactions that occur in the local area of the individual cathode particles. In this study, the spatial distributions of the chemical states present in prototypical layered LiCoO(2) cathode particles were determined at different charging conditions using scanning transmission X-ray microscopy (STXM) with a spatial resolution of approximately 100 nm. The Co L(3)- and O K-edge X-ray absorption spectroscopy (XAS) spectra, extracted from the same area of the corresponding STXM images, at the initial state as well as after charging to 4.5 V demonstrate the spatial distribution of the chemical state changes depending on individual particles. In addition to the Co L(3)-edge XAS spectra, the O K-edge XAS spectra of the initial and charged LiCoO(2) particles are different, indicating that both the Co and O sites participate in charge compensation during the charging process possibly through the hybridization between the Co 3d and O 2p orbitals. Furthermore, the element maps of both the Co and O sites, derived from the STXM stack images, reveal the spatial distribution of the chemical states inside individual particles after charging to 4.5 V. The element mapping analysis suggests that inhomogeneous reactions occur on the active particles and confirm the existence of non-active particles. The results of this study demonstrate that an STXM-based spatially resolved electronic structural analysis method is useful for understanding the charging and discharging of battery materials.
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spelling pubmed-100305742023-03-23 Chemical-state distributions in charged LiCoO(2) cathode particles visualized by soft X-ray spectromicroscopy Zhang, Wenxiong Hosono, Eiji Asakura, Daisuke Yuzawa, Hayato Ohigashi, Takuji Kobayashi, Masaki Kiuchi, Hisao Harada, Yoshihisa Sci Rep Article Lithium-ion deintercalation/intercalation during charge/discharge processes is one of the essential reactions that occur in the layered cathodes of lithium-ion batteries, and the performance of the cathode can be expressed as the sum of the reactions that occur in the local area of the individual cathode particles. In this study, the spatial distributions of the chemical states present in prototypical layered LiCoO(2) cathode particles were determined at different charging conditions using scanning transmission X-ray microscopy (STXM) with a spatial resolution of approximately 100 nm. The Co L(3)- and O K-edge X-ray absorption spectroscopy (XAS) spectra, extracted from the same area of the corresponding STXM images, at the initial state as well as after charging to 4.5 V demonstrate the spatial distribution of the chemical state changes depending on individual particles. In addition to the Co L(3)-edge XAS spectra, the O K-edge XAS spectra of the initial and charged LiCoO(2) particles are different, indicating that both the Co and O sites participate in charge compensation during the charging process possibly through the hybridization between the Co 3d and O 2p orbitals. Furthermore, the element maps of both the Co and O sites, derived from the STXM stack images, reveal the spatial distribution of the chemical states inside individual particles after charging to 4.5 V. The element mapping analysis suggests that inhomogeneous reactions occur on the active particles and confirm the existence of non-active particles. The results of this study demonstrate that an STXM-based spatially resolved electronic structural analysis method is useful for understanding the charging and discharging of battery materials. Nature Publishing Group UK 2023-03-21 /pmc/articles/PMC10030574/ /pubmed/36944681 http://dx.doi.org/10.1038/s41598-023-30673-1 Text en © The Author(s) 2023 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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Zhang, Wenxiong
Hosono, Eiji
Asakura, Daisuke
Yuzawa, Hayato
Ohigashi, Takuji
Kobayashi, Masaki
Kiuchi, Hisao
Harada, Yoshihisa
Chemical-state distributions in charged LiCoO(2) cathode particles visualized by soft X-ray spectromicroscopy
title Chemical-state distributions in charged LiCoO(2) cathode particles visualized by soft X-ray spectromicroscopy
title_full Chemical-state distributions in charged LiCoO(2) cathode particles visualized by soft X-ray spectromicroscopy
title_fullStr Chemical-state distributions in charged LiCoO(2) cathode particles visualized by soft X-ray spectromicroscopy
title_full_unstemmed Chemical-state distributions in charged LiCoO(2) cathode particles visualized by soft X-ray spectromicroscopy
title_short Chemical-state distributions in charged LiCoO(2) cathode particles visualized by soft X-ray spectromicroscopy
title_sort chemical-state distributions in charged licoo(2) cathode particles visualized by soft x-ray spectromicroscopy
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10030574/
https://www.ncbi.nlm.nih.gov/pubmed/36944681
http://dx.doi.org/10.1038/s41598-023-30673-1
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