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In situ synchrotron study of ordered and disordered LiMn1.5Ni0.5O4 as lithium ion battery positive electrode

Pushpaka B. Samarasingha, Jonas Sottmann, Serena Margadonna Orcid Logo, Hermann Emerich, Ola Nilsen, Helmer Fjellvåg

Acta Materialia, Volume: 116, Pages: 290 - 297

Swansea University Author: Serena Margadonna Orcid Logo

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DOI (Published version): 10.1016/j.actamat.2016.06.040

Abstract

In situ powder synchrotron diffraction and X-ray absorption spectroscopy have been used to investigate cation ordered as well as disordered modifications of the LiMn1.5Ni0.5O4 spinel-type compound as a Li-ion battery (LIB) cathode during electrochemical cycling. The structural state depends on the a...

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Published in: Acta Materialia
ISSN: 1359-6454
Published: 2016
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URI: https://cronfa.swan.ac.uk/Record/cronfa29192
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spelling 2021-01-07T15:05:09.5708558 v2 29192 2016-07-11 In situ synchrotron study of ordered and disordered LiMn1.5Ni0.5O4 as lithium ion battery positive electrode e31904a10b1b1240b98ab52d9977dfbe 0000-0002-6996-6562 Serena Margadonna Serena Margadonna true false 2016-07-11 CHEG In situ powder synchrotron diffraction and X-ray absorption spectroscopy have been used to investigate cation ordered as well as disordered modifications of the LiMn1.5Ni0.5O4 spinel-type compound as a Li-ion battery (LIB) cathode during electrochemical cycling. The structural state depends on the adopted heat treatment conditions and is ascertained by Raman and neutron diffraction data. The degree of Mn-Ni ordering (none, partial, complete) is one parameter that influences the electrochemical behaviour. The in situ data reveal significant differences in behaviour with respect to structural phase transitions during electrochemical cycling. Ordered Li2Mn3NiO8 (P4332) undergoes two consecutive first order structural phase transitions between spinel type phases during charging - discharging. These are most probably connected with steps in oxidation state for the Ni-atoms as supported by XANES data. The disordered phases (Fd-3m) show a mixed “solid solution - two phase” behaviour accompanied by a smooth decrease in the unit cell volume during charging over the two redox steps involved, Ni2+/Ni3+/Ni4+, however, also with volume jumps at first order transitions. This combined behaviour is explained for the first time for spinel type LiMn1.5Ni0.5O4 materials. It is not clear why ordered and disordered phases show different phase behaviors depending on the state of (dis)charge. This could be due to higher valent Mn taking part in the redox activity at higher voltages, however, future verification is required. Journal Article Acta Materialia 116 290 297 1359-6454 Lithium ion battery; Positive electrode material; In situ synchrotron; Diffraction; XANES 1 9 2016 2016-09-01 10.1016/j.actamat.2016.06.040 COLLEGE NANME Chemical Engineering COLLEGE CODE CHEG Swansea University 2021-01-07T15:05:09.5708558 2016-07-11T11:01:54.2646852 Faculty of Science and Engineering School of Engineering and Applied Sciences - Chemical Engineering Pushpaka B. Samarasingha 1 Jonas Sottmann 2 Serena Margadonna 0000-0002-6996-6562 3 Hermann Emerich 4 Ola Nilsen 5 Helmer Fjellvåg 6 0029192-26032018104914.pdf 29192.pdf 2018-03-26T10:49:14.2400000 Output 1891372 application/pdf Accepted Manuscript true 2017-07-01T00:00:00.0000000 Released under the terms of a Creative Commons Attribution Non-Commercial No Derivatives License (CC-BY-NC-ND). true eng
title In situ synchrotron study of ordered and disordered LiMn1.5Ni0.5O4 as lithium ion battery positive electrode
spellingShingle In situ synchrotron study of ordered and disordered LiMn1.5Ni0.5O4 as lithium ion battery positive electrode
Serena Margadonna
title_short In situ synchrotron study of ordered and disordered LiMn1.5Ni0.5O4 as lithium ion battery positive electrode
title_full In situ synchrotron study of ordered and disordered LiMn1.5Ni0.5O4 as lithium ion battery positive electrode
title_fullStr In situ synchrotron study of ordered and disordered LiMn1.5Ni0.5O4 as lithium ion battery positive electrode
title_full_unstemmed In situ synchrotron study of ordered and disordered LiMn1.5Ni0.5O4 as lithium ion battery positive electrode
title_sort In situ synchrotron study of ordered and disordered LiMn1.5Ni0.5O4 as lithium ion battery positive electrode
author_id_str_mv e31904a10b1b1240b98ab52d9977dfbe
author_id_fullname_str_mv e31904a10b1b1240b98ab52d9977dfbe_***_Serena Margadonna
author Serena Margadonna
author2 Pushpaka B. Samarasingha
Jonas Sottmann
Serena Margadonna
Hermann Emerich
Ola Nilsen
Helmer Fjellvåg
format Journal article
container_title Acta Materialia
container_volume 116
container_start_page 290
publishDate 2016
institution Swansea University
issn 1359-6454
doi_str_mv 10.1016/j.actamat.2016.06.040
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Chemical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Chemical Engineering
document_store_str 1
active_str 0
description In situ powder synchrotron diffraction and X-ray absorption spectroscopy have been used to investigate cation ordered as well as disordered modifications of the LiMn1.5Ni0.5O4 spinel-type compound as a Li-ion battery (LIB) cathode during electrochemical cycling. The structural state depends on the adopted heat treatment conditions and is ascertained by Raman and neutron diffraction data. The degree of Mn-Ni ordering (none, partial, complete) is one parameter that influences the electrochemical behaviour. The in situ data reveal significant differences in behaviour with respect to structural phase transitions during electrochemical cycling. Ordered Li2Mn3NiO8 (P4332) undergoes two consecutive first order structural phase transitions between spinel type phases during charging - discharging. These are most probably connected with steps in oxidation state for the Ni-atoms as supported by XANES data. The disordered phases (Fd-3m) show a mixed “solid solution - two phase” behaviour accompanied by a smooth decrease in the unit cell volume during charging over the two redox steps involved, Ni2+/Ni3+/Ni4+, however, also with volume jumps at first order transitions. This combined behaviour is explained for the first time for spinel type LiMn1.5Ni0.5O4 materials. It is not clear why ordered and disordered phases show different phase behaviors depending on the state of (dis)charge. This could be due to higher valent Mn taking part in the redox activity at higher voltages, however, future verification is required.
published_date 2016-09-01T03:35:34Z
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score 10.998093

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