| Item type |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2021-03-02 |
| タイトル |
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タイトル |
Electrolyte Dependency on Ca2+ Insertion and Extraction Properties of V2O5 |
| タイトル |
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タイトル |
Electrolyte Dependency on Ca2+ Insertion and Extraction Properties of V2O5 |
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言語 |
en |
| 言語 |
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言語 |
eng |
| 資源タイプ |
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資源タイプ |
journal article |
| 著者 |
村田, 芳明
稲田, 亮史
櫻井, 庸司
Murata, Yoshiaki
Inada, Ryoji
Sakurai, Yoji
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| 抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
The influence of the electrolyte structure on the Ca2+ ion insertion and extraction properties of V2O5 was studied by changing the electrolyte concentration or solvent. The electrolyte structure was analyzed by Raman spectroscopy. The most significant changes were found in the molar ratio of the contact ion pair (CIP) in the total ionic species. Among the various electrolytes, 0.3 M Ca(TFSI)2 dissolved in ethylene carbonate and dimethyl carbonate (0.3 M EC:DMC) and 0.5 M Ca(TFSI)2 dissolved in triglyme (0.5 M G3) have relatively small molar ratios of CIPs. The electrochemical performance was strongly related to the molar ratio of the CIPs. A high coulombic efficiency and high capacity were observed when using 0.3 M EC–DMC. Moreover, 0.5 M G3 showed the highest capacity despite its low coulombic efficiency. This could be related to the formation of solvent-separated ion pairs (SSIPs) due to the low polarity of G3 and its solvation form that encapsulates Ca2+. SSIPs had a reductively unstable character as that of the CIPs. Surface analysis revealed that the thinner the surface film produced, the lower the CIP content. This was deemed responsible for the rate performance enhancements, given the potential electrochemical instability of the Ca-containing CIPs. |
| 書誌情報 |
Journal of The Electrochemical Society
en : Journal of The Electrochemical Society
巻 168,
p. 020528,
発行日 2021
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| 出版者 |
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出版者 |
The Electrochemical Society |
| ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
0013-4651 |
| DOI |
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関連タイプ |
isVersionOf |
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識別子タイプ |
DOI |
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関連識別子 |
10.1149/1945-7111/abdfe4 |
| 権利 |
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権利情報 |
© 2021 The Author(s). Published on behalf of The Electrochemical Society by IOP Publishing Limited.This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited. |
| 関連サイト |
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識別子タイプ |
URI |
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関連識別子 |
https://iopscience.iop.org/article/10.1149/1945-7111/abdfe4 |
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関連名称 |
The Electrochemical Society |
| 著者版フラグ |
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出版タイプ |
AM |
j00134651-0168-020528.pdf (1.2 MB)
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