Phase transition and conductive acceleration of phosphonium-cation-based room-temperature ionic liquid

Shiro Seki; Yasuhiro Umebayashi; Seiji Tsuzuki; Kikuko Hayamizu; Yo Kobayashi; Yasutaka Ohno; Takeshi Kobayashi; Yuichi Mita; Hajime Miyashiro; Nobuyuki Terada; Shin-ichi Ishiguro

doi:10.1039/B809309A

Phase transition and conductive acceleration of phosphonium-cation-based room-temperature ionic liquid†

Shiro Seki,*^a Yasuhiro Umebayashi,^b Seiji Tsuzuki,^c Kikuko Hayamizu,^c Yo Kobayashi,^a Yasutaka Ohno,^a Takeshi Kobayashi,^a Yuichi Mita,^a Hajime Miyashiro,^a Nobuyuki Terada^a and Shin-ichi Ishiguro^b

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* Corresponding authors

^a Materials Science Research Laboratory, Central Research Institute of Electric Power Industry (CRIEPI), 2-11-1, Iwado-kita, Komae, Tokyo 201-8511, Japan
E-mail: s-seki@criepi.denken.or.jp
Fax: +81-3-3480-3401
Tel: +81-3-3480-2111

^b Department of Chemistry, Faculty of Science, Kyushu University, Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan

^c National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Center, Tsukuba, Ibaraki 305-8565, Japan

Abstract

An unusual ionic conduction phenomenon related to the phase transition of a novel phosphonium-cation-based room-temperature ionic liquid (RTIL) is reported; we found that in the phase change upon cooling, a clear increase in ionic conductivity was seen as the temperature was lowered, which differs from widely known conventional RTILs; clearly, our finding of abnormality of the correlation between temperature change and ionic conduction is the first observation in the electrolyte field.

Chemical Communications

Phase transition and conductive acceleration of phosphonium-cation-based room-temperature ionic liquid†

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Phase transition and conductive acceleration of phosphonium-cation-based room-temperature ionic liquid

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