Pair distribution function analysis of sulfide glassy electrolytes for all-solid-state batteries: Understanding the improvement of ionic conductivity under annealing condition

Abstract In general, the ionic conductivity of sulfide glasses decreases with their crystallization, although it increases for a few sulphide glasses owing to the crystallization of a highly conductive new phase (e.g., Li7P3S11: 70Li2S-30P2S5). We found that the ionic conductivity of 75Li2S-25P2S5 s...

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Autores principales:	Shinya Shiotani, Koji Ohara, Hirofumi Tsukasaki, Shigeo Mori, Ryoji Kanno
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/22485664b1b94b95a012bb0f7637cfee
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spelling	oai:doaj.org-article:22485664b1b94b95a012bb0f7637cfee2021-12-02T15:05:51ZPair distribution function analysis of sulfide glassy electrolytes for all-solid-state batteries: Understanding the improvement of ionic conductivity under annealing condition10.1038/s41598-017-07086-y2045-2322https://doaj.org/article/22485664b1b94b95a012bb0f7637cfee2017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-07086-yhttps://doaj.org/toc/2045-2322Abstract In general, the ionic conductivity of sulfide glasses decreases with their crystallization, although it increases for a few sulphide glasses owing to the crystallization of a highly conductive new phase (e.g., Li7P3S11: 70Li2S-30P2S5). We found that the ionic conductivity of 75Li2S-25P2S5 sulfide glass, which consists of glassy and crystalline phases, is improved by optimizing the conditions of the heat treatment, i.e., annealing. A different mechanism of high ionic conductivity from the conventional mechanism is expected in the glassy phase. Here, we report the glassy structure of 75Li2S-25P2S5 immediately before the crystallization by using the differential pair distribution function (d-PDF) analysis of high-energy X-ray diffraction. Even though the ionic conductivity increases during the optimum annealing, the d-PDF analysis indicated that the glassy structure undergoes no structural change in the sulfide glass-ceramic electrolyte at a crystallinity of 33.1%. We observed the formation of a nanocrystalline phase in the X-ray and electron diffraction patterns before the crystallization, which means that Bragg peaks were deformed. Thus, the ionic conductivity in the mixture of glassy and crystalline phases is improved by the coexistence of the nanocrystalline phase.Shinya ShiotaniKoji OharaHirofumi TsukasakiShigeo MoriRyoji KannoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-7 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Shinya Shiotani Koji Ohara Hirofumi Tsukasaki Shigeo Mori Ryoji Kanno Pair distribution function analysis of sulfide glassy electrolytes for all-solid-state batteries: Understanding the improvement of ionic conductivity under annealing condition
description	Abstract In general, the ionic conductivity of sulfide glasses decreases with their crystallization, although it increases for a few sulphide glasses owing to the crystallization of a highly conductive new phase (e.g., Li7P3S11: 70Li2S-30P2S5). We found that the ionic conductivity of 75Li2S-25P2S5 sulfide glass, which consists of glassy and crystalline phases, is improved by optimizing the conditions of the heat treatment, i.e., annealing. A different mechanism of high ionic conductivity from the conventional mechanism is expected in the glassy phase. Here, we report the glassy structure of 75Li2S-25P2S5 immediately before the crystallization by using the differential pair distribution function (d-PDF) analysis of high-energy X-ray diffraction. Even though the ionic conductivity increases during the optimum annealing, the d-PDF analysis indicated that the glassy structure undergoes no structural change in the sulfide glass-ceramic electrolyte at a crystallinity of 33.1%. We observed the formation of a nanocrystalline phase in the X-ray and electron diffraction patterns before the crystallization, which means that Bragg peaks were deformed. Thus, the ionic conductivity in the mixture of glassy and crystalline phases is improved by the coexistence of the nanocrystalline phase.
format	article
author	Shinya Shiotani Koji Ohara Hirofumi Tsukasaki Shigeo Mori Ryoji Kanno
author_facet	Shinya Shiotani Koji Ohara Hirofumi Tsukasaki Shigeo Mori Ryoji Kanno
author_sort	Shinya Shiotani
title	Pair distribution function analysis of sulfide glassy electrolytes for all-solid-state batteries: Understanding the improvement of ionic conductivity under annealing condition
title_short	Pair distribution function analysis of sulfide glassy electrolytes for all-solid-state batteries: Understanding the improvement of ionic conductivity under annealing condition
title_full	Pair distribution function analysis of sulfide glassy electrolytes for all-solid-state batteries: Understanding the improvement of ionic conductivity under annealing condition
title_fullStr	Pair distribution function analysis of sulfide glassy electrolytes for all-solid-state batteries: Understanding the improvement of ionic conductivity under annealing condition
title_full_unstemmed	Pair distribution function analysis of sulfide glassy electrolytes for all-solid-state batteries: Understanding the improvement of ionic conductivity under annealing condition
title_sort	pair distribution function analysis of sulfide glassy electrolytes for all-solid-state batteries: understanding the improvement of ionic conductivity under annealing condition
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/22485664b1b94b95a012bb0f7637cfee
work_keys_str_mv	AT shinyashiotani pairdistributionfunctionanalysisofsulfideglassyelectrolytesforallsolidstatebatteriesunderstandingtheimprovementofionicconductivityunderannealingcondition AT kojiohara pairdistributionfunctionanalysisofsulfideglassyelectrolytesforallsolidstatebatteriesunderstandingtheimprovementofionicconductivityunderannealingcondition AT hirofumitsukasaki pairdistributionfunctionanalysisofsulfideglassyelectrolytesforallsolidstatebatteriesunderstandingtheimprovementofionicconductivityunderannealingcondition AT shigeomori pairdistributionfunctionanalysisofsulfideglassyelectrolytesforallsolidstatebatteriesunderstandingtheimprovementofionicconductivityunderannealingcondition AT ryojikanno pairdistributionfunctionanalysisofsulfideglassyelectrolytesforallsolidstatebatteriesunderstandingtheimprovementofionicconductivityunderannealingcondition
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Pair distribution function analysis of sulfide glassy electrolytes for all-solid-state batteries: Understanding the improvement of ionic conductivity under annealing condition

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