Lithium-Cation Conductivity of Solid Solutions in Li6-xZr2-xAxO7 (A = Nb, Ta) Systems

Li6-xZr2-xAxO7 (A = Nb; Ta) system with 0 < x < 0.30 is synthesized by glycine-nitrate method. Boundaries of solid solutions based on monoclinic Li6Zr2O7 ar...

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Auteurs principaux:	Georgiy Sh. Shekhtman, Anastasia V. Kalashnova, Boris D. Antonov
Format:	article
Langue:	EN
Publié:	MDPI AG 2021
Sujets:	solid electrolytes lithium zirconates lithium cation conductivity crystal structure glycine-nitrate synthesis heterovalent doping Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Accès en ligne:	https://doaj.org/article/5615e4e763c3495abf5d98954250b3cd
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spelling	oai:doaj.org-article:5615e4e763c3495abf5d98954250b3cd2021-11-25T18:14:36ZLithium-Cation Conductivity of Solid Solutions in Li<sub>6-x</sub>Zr<sub>2-x</sub>A<sub>x</sub>O<sub>7</sub> (A = Nb, Ta) Systems10.3390/ma142269041996-1944https://doaj.org/article/5615e4e763c3495abf5d98954250b3cd2021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/22/6904https://doaj.org/toc/1996-1944Li<sub>6-x</sub>Zr<sub>2-x</sub>AxO<sub>7</sub> (A = Nb; Ta) system with 0 < x < 0.30 is synthesized by glycine-nitrate method. Boundaries of solid solutions based on monoclinic Li<sub>6</sub>Zr<sub>2</sub>O<sub>7</sub> are determined; temperature (200–600 °C) and concentration dependences of conductivity are investigated. It is shown that monoclinic Li<sub>6</sub>Zr<sub>2</sub>O<sub>7</sub> exhibits better transport properties compared to its triclinic modification. Li<sub>5.8</sub>Zr<sub>1.8</sub>Nb(Ta)<sub>0.2</sub>O<sub>7</sub> solid solutions have a higher lithium-cation conductivity at 300 °C compared to solid electrolytes based on other lithium zirconates due the “open” structure of monoclinic Li<sub>6</sub>Zr<sub>2</sub>O<sub>7</sub> and a high solubility of the doping cations.Georgiy Sh. ShekhtmanAnastasia V. KalashnovaBoris D. AntonovMDPI AGarticlesolid electrolyteslithium zirconateslithium cation conductivitycrystal structureglycine-nitrate synthesisheterovalent dopingTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6904, p 6904 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	solid electrolytes lithium zirconates lithium cation conductivity crystal structure glycine-nitrate synthesis heterovalent doping Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	solid electrolytes lithium zirconates lithium cation conductivity crystal structure glycine-nitrate synthesis heterovalent doping Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Georgiy Sh. Shekhtman Anastasia V. Kalashnova Boris D. Antonov Lithium-Cation Conductivity of Solid Solutions in Li<sub>6-x</sub>Zr<sub>2-x</sub>A<sub>x</sub>O<sub>7</sub> (A = Nb, Ta) Systems
description	Li<sub>6-x</sub>Zr<sub>2-x</sub>AxO<sub>7</sub> (A = Nb; Ta) system with 0 < x < 0.30 is synthesized by glycine-nitrate method. Boundaries of solid solutions based on monoclinic Li<sub>6</sub>Zr<sub>2</sub>O<sub>7</sub> are determined; temperature (200–600 °C) and concentration dependences of conductivity are investigated. It is shown that monoclinic Li<sub>6</sub>Zr<sub>2</sub>O<sub>7</sub> exhibits better transport properties compared to its triclinic modification. Li<sub>5.8</sub>Zr<sub>1.8</sub>Nb(Ta)<sub>0.2</sub>O<sub>7</sub> solid solutions have a higher lithium-cation conductivity at 300 °C compared to solid electrolytes based on other lithium zirconates due the “open” structure of monoclinic Li<sub>6</sub>Zr<sub>2</sub>O<sub>7</sub> and a high solubility of the doping cations.
format	article
author	Georgiy Sh. Shekhtman Anastasia V. Kalashnova Boris D. Antonov
author_facet	Georgiy Sh. Shekhtman Anastasia V. Kalashnova Boris D. Antonov
author_sort	Georgiy Sh. Shekhtman
title	Lithium-Cation Conductivity of Solid Solutions in Li<sub>6-x</sub>Zr<sub>2-x</sub>A<sub>x</sub>O<sub>7</sub> (A = Nb, Ta) Systems
title_short	Lithium-Cation Conductivity of Solid Solutions in Li<sub>6-x</sub>Zr<sub>2-x</sub>A<sub>x</sub>O<sub>7</sub> (A = Nb, Ta) Systems
title_full	Lithium-Cation Conductivity of Solid Solutions in Li<sub>6-x</sub>Zr<sub>2-x</sub>A<sub>x</sub>O<sub>7</sub> (A = Nb, Ta) Systems
title_fullStr	Lithium-Cation Conductivity of Solid Solutions in Li<sub>6-x</sub>Zr<sub>2-x</sub>A<sub>x</sub>O<sub>7</sub> (A = Nb, Ta) Systems
title_full_unstemmed	Lithium-Cation Conductivity of Solid Solutions in Li<sub>6-x</sub>Zr<sub>2-x</sub>A<sub>x</sub>O<sub>7</sub> (A = Nb, Ta) Systems
title_sort	lithium-cation conductivity of solid solutions in li<sub>6-x</sub>zr<sub>2-x</sub>a<sub>x</sub>o<sub>7</sub> (a = nb, ta) systems
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/5615e4e763c3495abf5d98954250b3cd
work_keys_str_mv	AT georgiyshshekhtman lithiumcationconductivityofsolidsolutionsinlisub6xsubzrsub2xsubasubxsubosub7subanbtasystems AT anastasiavkalashnova lithiumcationconductivityofsolidsolutionsinlisub6xsubzrsub2xsubasubxsubosub7subanbtasystems AT borisdantonov lithiumcationconductivityofsolidsolutionsinlisub6xsubzrsub2xsubasubxsubosub7subanbtasystems
_version_	1718411437490044928

Lithium-Cation Conductivity of Solid Solutions in Li<sub>6-x</sub>Zr<sub>2-x</sub>A<sub>x</sub>O<sub>7</sub> (A = Nb, Ta) Systems

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