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タイトル: | Physicochemical and Electrochemical Properties of K[N(SO₂F)₂]-[N-Methyl-N-propylpyrrolidinium][N(SO₂F)₂] Ionic Liquids for Potassium-Ion Batteries |
著者: | Yamamoto, Takayuki https://orcid.org/0000-0003-3553-3272 (unconfirmed) Matsumoto, Kazuhiko https://orcid.org/0000-0002-0770-9210 (unconfirmed) Hagiwara, Rika https://orcid.org/0000-0002-7234-3980 (unconfirmed) Nohira, Toshiyuki https://orcid.org/0000-0002-4053-554X (unconfirmed) |
著者名の別形: | 山本, 貴之 松本, 一彦 萩原, 理加 野平, 俊之 |
キーワード: | General Energy Physical and Theoretical Chemistry Electronic, Optical and Magnetic Materials Surfaces, Coatings and Films |
発行日: | 31-Aug-2017 |
出版者: | American Chemical Society (ACS) |
誌名: | The Journal of Physical Chemistry C |
巻: | 121 |
号: | 34 |
開始ページ: | 18450 |
終了ページ: | 18458 |
抄録: | The physicochemical and electrochemical properties of the binary ionic liquid, K[FSA]–[C₃C₁pyrr][FSA] (FSA = bis(fluorosulfonyl)amide; C₃C₁pyrr = N-methyl-N-propylpyrrolidinium), were investigated at 253–393 K, with the aim of developing a new electrolyte for potassium-ion batteries (K-ion batteries; KIBs). A phase diagram was constructed from the results of differential scanning calorimetry measurements and revealed that the melting point of this ionic liquid is below room temperature for compositions of x(K[FSA]) = 0–0.25 (x(K[FSA]) = molar fraction of K[FSA]). The viscosity, ionic conductivity, and density were measured for x(K[FSA]) = 0–0.25. The ionic conductivity when x(K[FSA]) = 0.20 was 4.8 mS cm⁻¹ at 298 K, which is higher than that for the equivalent sodium and lithium ionic liquids. Cyclic voltammetry measurements of M[FSA]–[C₃C₁pyrr][FSA] ionic liquids (x(M[FSA]) = 0.20; M = K, Na, or Li) indicated that potassium metal deposition/dissolution occurs at a more negative potential than that for lithium and sodium deposition/dissolution, suggesting that KIBs with a high operating voltage can be constructed using K[FSA]–[C₃C₁pyrr][FSA] as an ionic liquid electrolyte. |
著作権等: | This document is the Accepted Manuscript version of a Published Work that appeared in final form in The Journal of Physical Chemistry C, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.jpcc.7b06523. This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 |
URI: | http://hdl.handle.net/2433/261771 |
DOI(出版社版): | 10.1021/acs.jpcc.7b06523 |
出現コレクション: | 学術雑誌掲載論文等 |
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