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Unravelling structural ambiguities in lithium- and manganese-rich transition metal oxides

Although Li- and Mn-rich transition metal oxides have been extensively studied as high-capacity cathode materials for Li-ion batteries, the crystal structure of these materials in their pristine state is not yet fully understood. Here we apply complementary electron microscopy and spectroscopy techn...

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Autores principales: Shukla, Alpesh Khushalchand, Ramasse, Quentin M., Ophus, Colin, Duncan, Hugues, Hage, Fredrik, Chen, Guoying
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4846316/
https://www.ncbi.nlm.nih.gov/pubmed/26510508
http://dx.doi.org/10.1038/ncomms9711
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author Shukla, Alpesh Khushalchand
Ramasse, Quentin M.
Ophus, Colin
Duncan, Hugues
Hage, Fredrik
Chen, Guoying
author_facet Shukla, Alpesh Khushalchand
Ramasse, Quentin M.
Ophus, Colin
Duncan, Hugues
Hage, Fredrik
Chen, Guoying
author_sort Shukla, Alpesh Khushalchand
collection PubMed
description Although Li- and Mn-rich transition metal oxides have been extensively studied as high-capacity cathode materials for Li-ion batteries, the crystal structure of these materials in their pristine state is not yet fully understood. Here we apply complementary electron microscopy and spectroscopy techniques at multi-length scale on well-formed Li(1.2)(Ni(0.13)Mn(0.54)Co(0.13))O(2) crystals with two different morphologies as well as two commercially available materials with similar compositions, and unambiguously describe the structural make-up of these samples. Systematically observing the entire primary particles along multiple zone axes reveals that they are consistently made up of a single phase, save for rare localized defects and a thin surface layer on certain crystallographic facets. More specifically, we show the bulk of the oxides can be described as an aperiodic crystal consisting of randomly stacked domains that correspond to three variants of monoclinic structure, while the surface is composed of a Co- and/or Ni-rich spinel with antisite defects.
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spelling pubmed-48463162016-05-05 Unravelling structural ambiguities in lithium- and manganese-rich transition metal oxides Shukla, Alpesh Khushalchand Ramasse, Quentin M. Ophus, Colin Duncan, Hugues Hage, Fredrik Chen, Guoying Nat Commun Article Although Li- and Mn-rich transition metal oxides have been extensively studied as high-capacity cathode materials for Li-ion batteries, the crystal structure of these materials in their pristine state is not yet fully understood. Here we apply complementary electron microscopy and spectroscopy techniques at multi-length scale on well-formed Li(1.2)(Ni(0.13)Mn(0.54)Co(0.13))O(2) crystals with two different morphologies as well as two commercially available materials with similar compositions, and unambiguously describe the structural make-up of these samples. Systematically observing the entire primary particles along multiple zone axes reveals that they are consistently made up of a single phase, save for rare localized defects and a thin surface layer on certain crystallographic facets. More specifically, we show the bulk of the oxides can be described as an aperiodic crystal consisting of randomly stacked domains that correspond to three variants of monoclinic structure, while the surface is composed of a Co- and/or Ni-rich spinel with antisite defects. Nature Publishing Group 2015-10-29 /pmc/articles/PMC4846316/ /pubmed/26510508 http://dx.doi.org/10.1038/ncomms9711 Text en Copyright © 2015, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Shukla, Alpesh Khushalchand
Ramasse, Quentin M.
Ophus, Colin
Duncan, Hugues
Hage, Fredrik
Chen, Guoying
Unravelling structural ambiguities in lithium- and manganese-rich transition metal oxides
title Unravelling structural ambiguities in lithium- and manganese-rich transition metal oxides
title_full Unravelling structural ambiguities in lithium- and manganese-rich transition metal oxides
title_fullStr Unravelling structural ambiguities in lithium- and manganese-rich transition metal oxides
title_full_unstemmed Unravelling structural ambiguities in lithium- and manganese-rich transition metal oxides
title_short Unravelling structural ambiguities in lithium- and manganese-rich transition metal oxides
title_sort unravelling structural ambiguities in lithium- and manganese-rich transition metal oxides
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4846316/
https://www.ncbi.nlm.nih.gov/pubmed/26510508
http://dx.doi.org/10.1038/ncomms9711
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