Synthesis of polycarbosilanes having a five-membered cyclic carbonate structure and their application to prepare gel polymer electrolytes for lithium ion batteries

Authors

  • Kozo Matsumoto,

    1. Molecular Engineering Institute, Kinki University, 11-6 Kayanomori, Iizuka, Fukuoka Prefecture 820-8555, Japan
    2. Department of Biological & Environmental Chemistry, Kinki University, 11-6 Kayanomori, Iizuka, Fukuoka Prefecture 820-8555, Japan
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  • Takeshi Endo,

    Corresponding author
    1. Molecular Engineering Institute, Kinki University, 11-6 Kayanomori, Iizuka, Fukuoka Prefecture 820-8555, Japan
    • Molecular Engineering Institute, Kinki University, 11-6 Kayanomori, Iizuka, Fukuoka Prefecture 820-8555, Japan
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  • Kouhei Katsuda,

    1. Research Fellow Laboratories Yokkaichi JSR Corporation, 100 Kawajiri-cho, Yokkaichi, Mie Prefecture 510-8552, Japan
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  • Hojin Lee,

    1. Research Fellow Laboratories Yokkaichi JSR Corporation, 100 Kawajiri-cho, Yokkaichi, Mie Prefecture 510-8552, Japan
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  • Kinji Yamada

    1. Research Fellow Laboratories Yokkaichi JSR Corporation, 100 Kawajiri-cho, Yokkaichi, Mie Prefecture 510-8552, Japan
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Abstract

A silacyclobutane having a five-membered cyclic carbonate structure (SBMC) was prepared, and its transition metal-catalyzed ring-opening polymerization at the four-membered carbosilane unit was investigated as well as formation of carbosilane networked polymers and polymer gel electrolytes. The SBMC was synthesized by epoxidation of 1-(4-butenyl)-1-methylsilacyclobutane followed by insertion of CO2 to the epoxide. Ring-opening polymerization of the silacyclobutane moiety in the SBMC readily proceeded by a transition metal catalyst such as platinum divinyltetramethyldisiloxane complex. A flexible networked polymer film was obtained by copolymerization of the SBMC with a small amount of crosslinker, hexamethylene-1,6-bis(1-methylsilacyclobutane) (HMBS). The copolymerization of SBMC and HMBS in 1 M LiPF6 solution in ethylene carbonate and diethyl carbonate (3/7 v/v) gave a gel polymer electrolyte, which showed good ionic conductivity and could be applied to lithium ion batteries. © 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2012

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