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https://hdl.handle.net/20.500.14094/90007531
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2024-04-26
18:37 集計
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90007531 (fulltext)
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3.76 MB
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メタデータID
90007531
アクセス権
open access
出版タイプ
Accepted Manuscript
タイトル
Solvent molecule mobilities in propylene carbonate-based electrolyte solutions coexisting with fumed oxide nanoparticles
著者
Maki, Hideshi ; Takemoto, Marie ; Sogawa, Ren ; Mizuhata, Minoru
著者ID
A0923
研究者ID
1000030283873
KUID
https://kuid-rm-web.ofc.kobe-u.ac.jp/search/detail?systemId=0254a9fbd8d16dcd520e17560c007669
著者名
Maki, Hideshi
牧, 秀志
マキ, ヒデシ
所属機関名
環境保全推進センター
著者名
Takemoto, Marie
著者名
Sogawa, Ren
著者ID
A0922
研究者ID
1000010283871
KUID
https://kuid-rm-web.ofc.kobe-u.ac.jp/search/detail?systemId=bc56357c0d6f0f29520e17560c007669
著者名
Mizuhata, Minoru
水畑, 穣
ミズハタ, ミノル
所属機関名
工学研究科
収録物名
Colloids and Surfaces A: Physicochemical and Engineering Aspects
巻(号)
562
ページ
270-279
出版者
Elsevier B.V.
刊行日
2019-02-05
公開日
2021-03-01
抄録
Non-aqueous LiClO4 solutions kneaded with various fumed oxides (fumed silica, fumed alumina, and fumed titania) were employed as model systems of lithium ion batteries. The properties of the solid phase and Li+ ions, which affect solvent molecules, were evaluated using 1H NMR spectroscopy and 1H NMR relaxation time (T1, T2) measurements. The 1H NMR signals of propylene carbonate (PC) molecules were influenced by the coexisting solid phase in the LiClO4-PC solution/fumed oxide nanoparticle dispersion. The mobilities of the PC molecules drastically decreased in the presence of only 1–2 vol% of the solid phase (liquid phase thickness is 15–20 nm or less), regardless of the fumed oxide employed. In the IR spectra of the PC/fumed alumina systems, the vibrations at higher wavenumbers were predominantly observed because of indirect electron-donation from the solid surface. The 1H NMR signal detection ratios depended on the fraction of the liquid phase influenced by the solid phase. In the LiClO4-PC solution/fumed alumina systems, the 1H NMR signal detection ratios greatly decreased because of this influence; here, the large positive zeta potential of the solid phase surface of fumed alumina attracted the PC molecules, which had local negative electric fields owing to polarization. Moreover, the T1 and T2 results confirmed that the interaction between the solid phase and PC molecules is much smaller than that between the solid phase and water molecules. Additionally, it was seen that the PC solution system was more significantly affected than the aqueous solution system; the network structure of the entire PC solvent is greatly affected by the addition of the Li+ ion, and the relaxation time decreased significantly.
キーワード
Solvation
Interface
Lithium ion battery
NMR relaxation
LIB
Secondary battery
カテゴリ
環境保全推進センター
工学研究科
学術雑誌論文
権利
© 2018 Elsevier B.V.
This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
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資源タイプ
journal article
言語
English (英語)
ISSN
0927-7757
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eISSN
1873-4359
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NCID
AA10892561
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関連情報
DOI
https://doi.org/10.1016/j.colsurfa.2018.11.045
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