Abstract
The cross-linked composite solid polymer electrolytes composed of poly(ethylene oxide), lithium salt (LiN(SO2CF3)2), and a hyperbranched polymer whose repeating units were connected by ether-linkage (hyperbranched polymer (HBP)-2) were prepared, and their ionic conductivity, thermal properties, electrochemical stability, mechanical property, and chemical stability were investigated in comparison with the non-cross-linked or cross-linked composite solid polymer electrolytes using hyperbranched polymers whose repeating units were connected by ester-linkage (HBP-1a, 1b). The cross-linked composite solid polymer electrolyte using HBP-2 exhibited higher ionic conductivity than the non-cross-linked and cross-linked composite solid polymer electrolytes using HBP-1a and HBP-1b, respectively. The structure of the hyperbranched polymer did not have a significant effect on the thermal properties and electrochemical stability of the composite solid polymer electrolytes. The tensile strength of the cross-linked composite solid polymer electrolyte using HBP-2 was lower than that of the cross-linked composite solid polymer electrolyte using HBP-1b, but higher than that of the non-cross-linked composite solid polymer electrolyte using HBP-1a. The HBP-2 with ether-linkage showed higher chemical stability against alkaline hydrolysis compared with HBP-1a with ester-linkage.
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Acknowledgment
This work has partly been supported by Cooperation of Innovative Technology and Advanced Research in Evolution Area (City Area) project of Ministry of Education, Culture, Sports, Science and Technology, Japan.
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This original paper is a contribution to ABAF-10 meeting in Brno
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Uno, T., Sano, H., Matsumoto, M. et al. Properties of composite solid polymer electrolyte using hyperbranched polymer with ether-linkage. J Solid State Electrochem 14, 2161–2167 (2010). https://doi.org/10.1007/s10008-009-0999-7
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DOI: https://doi.org/10.1007/s10008-009-0999-7