| アイテムタイプ |
共通アイテムタイプ(1) |
| 公開日 |
2025-07-02 |
| タイトル |
|
|
タイトル |
Structurally controlled Na4VMn(PO4)3 cathodes via alkali metal cation substitution for high-performance sodium-ion batteries |
|
言語 |
en |
| 著者 |
Sun, Jiaze
Meng, Xianhe
Hui, Yitao
Shen, Qi
Fan, Meiqiang
Zhang, Jiaying
Wang, Xiong
Jiang, Hongmin
Kang, Qiaoling
Yan, Lijing
Wan, Chubin
馬, 廷麗
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| 著作権関連情報 |
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|
権利情報 |
Copyright (c) Elsevier Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies. |
|
言語 |
en |
| 抄録 |
|
|
内容記述タイプ |
Abstract |
|
内容記述 |
The Na superionic conductor (NASICON)-type Na4VMn(PO4)3 (NVMP), with its three-dimensional framework and high operating voltage, has demonstrated great potential as a cathode material for Sodium-ion batteries (SIBs). However, its performance is hindered by the Jahn-Teller effect from Mn3+ and slow Na+ diffusion kinetics, leading to capacity fade and structural instability. In this study, Li+ and K+ cations were separately doped into the NVMP structure to improve electrochemical performance. Li-doping enhanced the V3+/V4+ redox activity and significantly reduced the Jahn-Teller effect, contributing to a high-capacity retention of 97.7 % after 100 cycles at 1 C and 96.1 % after 1000 cycles at 10 C. This high-rate stability highlights the role of Li-doping in maintaining structural integrity and efficient ion transport under fast cycling conditions. Meanwhile, K-doping improved the structural stability by stabilizing V3+ oxidation states, leading to a capacity retention of 110.3 mAh g−1 after 100 cycles at 1 C and a discharge capacity of 99 mAh g−1 at 10 C. X-ray photoelectron spectroscopy (XPS) further confirmed that both Li+ and K+ doping suppressed the Jahn-Teller effect by regulating the Mn3+ environment, which contributed to the improved cycling stability and Na+ cation diffusion kinetics. These findings highlight the effectiveness of alkali metal cations doping as a strategy to enhance the cycling performance of NVMP cathodes for high-performance SIBs. |
|
言語 |
en |
| 書誌情報 |
en : Nano Energy
巻 134,
p. 110587,
発行日 2024-12-19
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| 出版社 |
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出版者 |
Elsevier |
|
言語 |
en |
| キーワード |
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|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
Sodium ion batteries |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
NASICON |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
Na4VMn(PO4)3 |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
Alkali-metal cations |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
Jahn-Teller effect |
| 言語 |
|
|
言語 |
eng |
| 資源タイプ |
|
|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
journal article |
| 出版タイプ |
|
|
出版タイプ |
AM |
|
出版タイプResource |
http://purl.org/coar/version/c_ab4af688f83e57aa |
| DOI |
|
|
|
識別子タイプ |
DOI |
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|
関連識別子 |
https://doi.org/10.1016/j.nanoen.2024.110587 |
| ISSN |
|
|
収録物識別子タイプ |
PISSN |
|
収録物識別子 |
2211-2855 |
| ISSN |
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|
収録物識別子タイプ |
EISSN |
|
収録物識別子 |
2211-3282 |
| 研究者情報 |
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|
URL |
https://hyokadb02.jimu.kyutech.ac.jp/html/100000666_ja.html |
| 論文ID（連携） |
|
|
値 |
10452721 |
| 連携ID |
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|
値 |
14598 |
10452721.pdf (3.5 MB)
