Properties of composite solid polymer electrolyte using hyperbranched polymer with ether-linkage |
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Authors: | Takahiro Uno Hiroki Sano Masashi Matsumoto Masataka Kubo Takahito Itoh |
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Institution: | (1) Division of Chemistry for Materials, Graduate School of Engineering, Mie University, 1577 Kurimamachiya-cho, Tsu Mie, 514-8507, Japan |
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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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