論文

査読有り
2018年10月

Optimizing Lithium Ion Conduction through Crown Ether-Based Cylindrical Channels in [Ni(dmit)(2)](-) Salts

CHEMISTRY OF MATERIALS
  • Katsuya Ichihashi
  • Daisuke Konno
  • Takuya Date
  • Takumi Nishimura
  • Kseniya Yu Maryunina
  • Katsuya Inoue
  • Toshimi Nakaya
  • Kazuhiro Toyoda
  • Yoko Tatewaki
  • Tomoyuki Akutagawa
  • Takayoshi Nakamura
  • Sadafumi Nishihara
  • 全て表示

30
20
開始ページ
7130
終了ページ
7137
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1021/acs.chemmater.8b03027
出版者・発行元
AMER CHEMICAL SOC

The synthesis of artificial ion channels is one of the core areas of biomimetics and is aimed at achieving control over channel functionality by careful design and selection of the constituent components. However, the optimization of ionic conductivity in the channel in the crystalline state is challenging because of crystal strain, polymorphism, and potentially limited stability. In this study, the pore size of cylindrical channels was controlled with the aim of optimizing ionic conductivity. We prepared two isomorphic salts, Li-2([18]crown-6)(3)[Ni-(dmit)(2)](2)(H2O)(4) (1) and Li-2([15]crown-5)(3)[Ni(dmit)(2)](2)(H2O)(2) (2), both of which possess ion channels formed by a one-dimensional array of crown ethers, Li + ions, and crystalline water molecules. Meanwhile, [Ni(dmit)(2)] - (S = 1/2) molecules formed a ladder configuration with J(rung)/k(B) = -631(5) K, J(l)(eg)/k(B) = -185(5) K for 1, and J(rung)/k(B) = -S17(4) K, J(l)(eg)/k(B) = -109(5) K for 2. For 1, the Li+ ionic conductivity at 293 K in the crystalline state was enhanced from 1.89(18) x 10(-8) S.cm(-1) to 2.46(6) X 10(-7) S.cm(-1) via dehydration. Furthermore, analysis of Li+ ionic conductivities of 2, which incorporated a crown ether with a smaller cavity (the cavity diameters of [18]crown-6 and [15]crown-5 are 2.60-3.20 angstrom and 1.70-2.20 angstrom, respectively) at the same temperature both before and after dehydration revealed conductivities of 1.93(31) X 10(-8) S.cm(-1) and 7.01(21) X 10(-7) S.cm(-1), respectively. This molecular design approach can contribute to increasing the ionic conductivity as well as the development of all-solid-state lithium ion batteries and other electronic device fabrications.

リンク情報
DOI
https://doi.org/10.1021/acs.chemmater.8b03027
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000448752100020&DestApp=WOS_CPL
ID情報
  • DOI : 10.1021/acs.chemmater.8b03027
  • ISSN : 0897-4756
  • eISSN : 1520-5002
  • Web of Science ID : WOS:000448752100020

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