Solid State Ionics, volume 310, pages 50-55
Chemical and structural changes of 70Li2S-30P2S5 solid electrolyte during heat treatment
Yasuhito Aoki
1
,
Kengo Ogawa
1
,
Takeshi Nakagawa
1
,
Yuichi HASEGAWA
1
,
Yoko Sakiyama
1
,
Toshikatsu Kojima
2
,
Mitsuharu Tabuchi
2
1
Toray Research Center Inc., 3-7, Sonoyama 3-chome, Otsu, Shiga, Japan
|
Publication type: Journal Article
Publication date: 2017-11-01
General Chemistry
Condensed Matter Physics
General Materials Science
Abstract
To elucidate the chemical and structural changes of sulfide solid electrolyte during heat treatment, in situ outgas (TPD-MS), Raman, and XRD analyses were applied for a 70Li2S-30P2S5 glass sample. A sulfide solid electrolyte was constructed from the PS43 − and P2S74 − anions, together with a small amount of P2S64 − anions. In the course of the structural change from glass to glass-ceramic through heat treatment, the fraction of PS43 − anion decreased and P2S74 − anion increased at 210 °C. Sulfur compounds were detected as outgas at about 240 °C, which suggests thermal decomposition of PS43 − anion to produce P2S74 − and sulfur compounds as by-product. The thermal treatment temperature should be higher than 240 °C to eliminate sulfur compounds generated as the reaction by-product. In the same temperature region, crystallization of Li7P3S11 was also detected using in situ XRD. The ionic conductivity increased from 1.0 × 10− 4 S cm− 1 to 8.4 × 10− 4 S cm− 1 after heat treatment at 270 °C. Therefore, the partial compositional change of PS43 − to P2S74 − anions and crystallization of Li7P3S11 are key factors producing higher ionic conductivity. By combining these experimental techniques implemented in this study, it is possible to detect the temperature at which the chemical and structural changes proceed. One can also ascertain the suitable heat treatment temperature for production of by-product free and high-quality sulfide-based solid electrolyte.
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Citations by publishers
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8 publications, 50%
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3 publications, 18.75%
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2 publications, 12.5%
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1 publication, 6.25%
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1 publication, 6.25%
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Aoki Y. et al. Chemical and structural changes of 70Li2S-30P2S5 solid electrolyte during heat treatment // Solid State Ionics. 2017. Vol. 310. pp. 50-55.
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Aoki Y., Ogawa K., Nakagawa T., HASEGAWA Y., Sakiyama Y., Kojima T., Tabuchi M. Chemical and structural changes of 70Li2S-30P2S5 solid electrolyte during heat treatment // Solid State Ionics. 2017. Vol. 310. pp. 50-55.
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TY - JOUR
DO - 10.1016/j.ssi.2017.08.006
UR - https://doi.org/10.1016/j.ssi.2017.08.006
TI - Chemical and structural changes of 70Li2S-30P2S5 solid electrolyte during heat treatment
T2 - Solid State Ionics
AU - Aoki, Yasuhito
AU - Ogawa, Kengo
AU - Nakagawa, Takeshi
AU - HASEGAWA, Yuichi
AU - Sakiyama, Yoko
AU - Kojima, Toshikatsu
AU - Tabuchi, Mitsuharu
PY - 2017
DA - 2017/11/01 00:00:00
PB - Elsevier
SP - 50-55
VL - 310
SN - 0167-2738
ER -
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@article{2017_Aoki,
author = {Yasuhito Aoki and Kengo Ogawa and Takeshi Nakagawa and Yuichi HASEGAWA and Yoko Sakiyama and Toshikatsu Kojima and Mitsuharu Tabuchi},
title = {Chemical and structural changes of 70Li2S-30P2S5 solid electrolyte during heat treatment},
journal = {Solid State Ionics},
year = {2017},
volume = {310},
publisher = {Elsevier},
month = {nov},
url = {https://doi.org/10.1016/j.ssi.2017.08.006},
pages = {50--55},
doi = {10.1016/j.ssi.2017.08.006}
}