Understanding the cation ordering transition in high-voltage spinel LiNi0.5Mn1.5O4 by doping Li instead of Ni

Abstract We determined how Li doping affects the Ni/Mn ordering in high-voltage spinel LiNi0.5Mn1.5O4(LNMO) by using neutron diffraction, TEM image, electrochemical measurements, and NMR data. The doped Li occupies empty octahedral interstitials (16c site) before the ordering transition, and can mov...

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Autores principales:	Junghwa Lee, Nicolas Dupre, Maxim Avdeev, Byoungwoo Kang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/0358b977b6614aa4b78b9f574aa73192
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spelling	oai:doaj.org-article:0358b977b6614aa4b78b9f574aa731922021-12-02T12:30:12ZUnderstanding the cation ordering transition in high-voltage spinel LiNi0.5Mn1.5O4 by doping Li instead of Ni10.1038/s41598-017-07139-22045-2322https://doaj.org/article/0358b977b6614aa4b78b9f574aa731922017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-07139-2https://doaj.org/toc/2045-2322Abstract We determined how Li doping affects the Ni/Mn ordering in high-voltage spinel LiNi0.5Mn1.5O4(LNMO) by using neutron diffraction, TEM image, electrochemical measurements, and NMR data. The doped Li occupies empty octahedral interstitials (16c site) before the ordering transition, and can move to normal octahedral sites (16d (4b) site) after the transition. This movement strongly affects the Ni/Mn ordering transition because Li at 16c sites blocks the ordering transition pathway and Li at 16d (4b) sites affects electrostatic interactions with transition metals. As a result, Li doping increases in the Ni/Mn disordering without the effect of Mn3+ ions even though the Li-doped LNMO undergoes order-disorder transition at 700 °C. Li doping can control the amount of Ni/Mn disordering in the spinel without the negative effect of Mn3+ ions on the electrochemical property.Junghwa LeeNicolas DupreMaxim AvdeevByoungwoo KangNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-12 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Junghwa Lee Nicolas Dupre Maxim Avdeev Byoungwoo Kang Understanding the cation ordering transition in high-voltage spinel LiNi0.5Mn1.5O4 by doping Li instead of Ni
description	Abstract We determined how Li doping affects the Ni/Mn ordering in high-voltage spinel LiNi0.5Mn1.5O4(LNMO) by using neutron diffraction, TEM image, electrochemical measurements, and NMR data. The doped Li occupies empty octahedral interstitials (16c site) before the ordering transition, and can move to normal octahedral sites (16d (4b) site) after the transition. This movement strongly affects the Ni/Mn ordering transition because Li at 16c sites blocks the ordering transition pathway and Li at 16d (4b) sites affects electrostatic interactions with transition metals. As a result, Li doping increases in the Ni/Mn disordering without the effect of Mn3+ ions even though the Li-doped LNMO undergoes order-disorder transition at 700 °C. Li doping can control the amount of Ni/Mn disordering in the spinel without the negative effect of Mn3+ ions on the electrochemical property.
format	article
author	Junghwa Lee Nicolas Dupre Maxim Avdeev Byoungwoo Kang
author_facet	Junghwa Lee Nicolas Dupre Maxim Avdeev Byoungwoo Kang
author_sort	Junghwa Lee
title	Understanding the cation ordering transition in high-voltage spinel LiNi0.5Mn1.5O4 by doping Li instead of Ni
title_short	Understanding the cation ordering transition in high-voltage spinel LiNi0.5Mn1.5O4 by doping Li instead of Ni
title_full	Understanding the cation ordering transition in high-voltage spinel LiNi0.5Mn1.5O4 by doping Li instead of Ni
title_fullStr	Understanding the cation ordering transition in high-voltage spinel LiNi0.5Mn1.5O4 by doping Li instead of Ni
title_full_unstemmed	Understanding the cation ordering transition in high-voltage spinel LiNi0.5Mn1.5O4 by doping Li instead of Ni
title_sort	understanding the cation ordering transition in high-voltage spinel lini0.5mn1.5o4 by doping li instead of ni
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/0358b977b6614aa4b78b9f574aa73192
work_keys_str_mv	AT junghwalee understandingthecationorderingtransitioninhighvoltagespinellini05mn15o4bydopingliinsteadofni AT nicolasdupre understandingthecationorderingtransitioninhighvoltagespinellini05mn15o4bydopingliinsteadofni AT maximavdeev understandingthecationorderingtransitioninhighvoltagespinellini05mn15o4bydopingliinsteadofni AT byoungwookang understandingthecationorderingtransitioninhighvoltagespinellini05mn15o4bydopingliinsteadofni
_version_	1718394376620605440

Understanding the cation ordering transition in high-voltage spinel LiNi0.5Mn1.5O4 by doping Li instead of Ni

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