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タイトル: Low temperature ionic conductor: Ionic liquid incorporated within a metal-organic framework
著者: Fujie, Kazuyuki
Otsubo, Kazuya  KAKEN_id  orcid https://orcid.org/0000-0003-4688-2822 (unconfirmed)
Ikeda, Ryuichi
Yamada, Teppei
Kitagawa, Hiroshi  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0001-6955-3015 (unconfirmed)
著者名の別形: 大坪, 主弥
北川, 宏
発行日: Jul-2015
出版者: Royal Society of Chemistry
誌名: Chemical Science
巻: 6
開始ページ: 4306
終了ページ: 4310
抄録: Ionic liquids (ILs) show promise as safe electrolytes for electrochemical devices. However, the conductivity of ILs decreases markedly at low temperatures because of strong interactions arising between the component ions. Metal-organic frameworks (MOFs) are appropriate microporous host materials that can control the dynamics of ILs via the nanosizing of ILs and tunable interactions of MOFs with the guest ILs. Here, for the first time, we report on the ionic conductivity of an IL incorporated within a MOF. The system studied consisted of EMI-TFSA (1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amide) and ZIF-8 (Zn(MeIM)<inf>2</inf>, H(MeIM) = 2-methylimidazole) as the IL and the MOF, respectively. While the ionic conductivity of bulk EMI-TFSA showed a sharp decrease arising from freezing, the EMI-TFSA@ZIF-8 showed no marked decrease because there was no phase transition. The ionic conductivity of EMI-TFSA@ZIF-8 was higher than that of bulk EMI-TFSA below 250 K. This result points towards a novel method by which to design electrolytes for electrochemical devices such as batteries that can operate at low temperatures.
著作権等: © The Royal Society of Chemistry 2015. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
URI: http://hdl.handle.net/2433/216549
DOI(出版社版): 10.1039/c5sc01398d
PubMed ID: 29218200
出現コレクション:学術雑誌掲載論文等

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