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Synthesis of functionalized copolymer electrolytes based on polysiloxane and analysis of their conductivity

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Abstract

Functionalized siloxane-based solid polymer electrolytes were synthesized using a platinum-catalyzed silylation reaction. The ionic conductivities of these solid polymer electrolytes were measured as a function of the concentration of lithium bis(trifluoromethylsulfonyl)imide (LiTFSi) salt. The highest ionic conductivity and lowest activation energy of solid polymer electrolytes were observed to be 1.15 × 10−4 S cm−1 (25 °C) and 3.85 kJ mol−1, respectively. The interface property between electrolyte and electrode and thermal stability of the polymer electrolytes were found to enhance after they were functionalized with acrylate, and the functionalized electrolytes were observed to maintain a glass transition temperature as low as that of other siloxane compounds. Thus, modifications involving acrylate with ethylene oxide group substitution provide a route for carrier ions and enhance both the ionic conductivity and mechanical properties of the siloxane structure.

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Acknowledgments

Financial support and technical assistance from the Materials and Chemical Research Laboratories at the Industrial Technology Research Institute (Taiwan) are gratefully acknowledged. American Journal Experts is also appreciated for the language assistance.

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Authors and Affiliations

  1. Department of Chemical Engineering, National Tsing Hua University, 101 Section 2, Kuang Fu Road, Hsinchu, 300, Taiwan

    Fu-Ming Wang, Chi-Chao Wan & Yung-Yun Wang

  2. Materials and Chemical Research Laboratories, Industrial Technology Research Institute, Rm. 405, Bldg. 77, 195 Sec. 4, Chung Hsing Rd., Chutung, Hsinchu, 310, Taiwan

    Fu-Ming Wang

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  1. Fu-Ming Wang
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  2. Chi-Chao Wan
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  3. Yung-Yun Wang
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Correspondence to Fu-Ming Wang.

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Wang, FM., Wan, CC. & Wang, YY. Synthesis of functionalized copolymer electrolytes based on polysiloxane and analysis of their conductivity. J Appl Electrochem 39, 253–260 (2009). https://doi.org/10.1007/s10800-008-9664-6

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  • DOI: https://doi.org/10.1007/s10800-008-9664-6

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