| Item type |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2025-11-04 |
| タイトル |
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|
タイトル |
Highly conductive Na5YSi4O12 ceramic solid electrolyte by controlling Na deficiency in the precursors |
|
言語 |
en |
| 言語 |
|
|
言語 |
eng |
| 資源タイプ |
|
|
資源タイプ |
journal article |
| アクセス権 |
|
|
アクセス権 |
open access |
|
アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 著者 |
Yasuda, Yoshiki
Tateno, Genta
Tojo, Tomohiro
Inada, Ryoji
安田, 吉輝
館野, 玄汰
東城, 友都
稲田, 亮史
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| 抄録 |
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内容記述タイプ |
Abstract |
|
内容記述 |
Na5YSi4O12 (NYSO) is known as a fast sodium-ion conductive oxide with both high ionic conductivity above 1 mS cm−1 at room temperature and excellent electrochemical stability against sodium metal anode, making it promising for solid-state sodium battery application. In this study, we investigated the influence of non-stoichiometry in the precursor composition on the crystal phase, microstructure and ionic conducting property of NYSO. It is found that NYSO prepared from the precursor with slight sodium-deficient composition showed the highest total (bulk + grain boundary) conductivity of 2.8 mS cm−1 at room temperature, which is superior to NYSO with stoichiometric precursor composition (∼ 1 mS cm−1). Although excess Na deficiency in the precursor results in the formation of Na3YSi3O9 phase, it does not influence so much on the sinterability and grain-boundary resistance of NYSO. Mitigation of Na9YSi6O18 phase formation during the fabrication is very important for the densification and reduction of grain-boundary resistance in NYSO ceramic electrolyte. |
|
言語 |
en |
| 書誌情報 |
en : Solid State Ionics
巻 432,
p. 117049,
発行日 2025-12-01
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| 出版者 |
|
|
出版者 |
Elsevier |
|
言語 |
en |
| ISSN |
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|
収録物識別子タイプ |
EISSN |
|
収録物識別子 |
1872-7689 |
| DOI |
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識別子タイプ |
DOI |
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関連識別子 |
10.1016/j.ssi.2025.117049 |
| 権利 |
|
|
権利情報 |
© 2025 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license ( http://creativecommons.org/licenses/by/4.0/ ). |
| 関連サイト |
|
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|
識別子タイプ |
URI |
|
|
関連識別子 |
https://www.sciencedirect.com/science/article/pii/S0167273825002681 |
|
|
言語 |
en |
|
|
関連名称 |
Elsevier Webサイト |
| 著者版フラグ |
|
|
出版タイプ |
VoR |
| キーワード |
|
|
主題 |
Solid electrolyte |
| キーワード |
|
|
主題 |
Oxide |
| キーワード |
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|
主題 |
Na-ion conductivity |
| キーワード |
|
|
主題 |
Non-stoichiometry |
s18727689-20251024.pdf (5.9 MB)
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