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Ionically conductive polymer gel electrolytes prepared from vinyl acetate and methyl methacrylate for electric double layer capacitor
Author(s) -
Kubota Naoji,
Watanabe Hisaaki,
Konaka Go,
Eguchi Yukari
Publication year - 2000
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(20000404)76:1<12::aid-app2>3.0.co;2-9
Subject(s) - materials science , electrolyte , propylene carbonate , polymer , cyclic voltammetry , polymer chemistry , ethylene carbonate , ethylene glycol , ethylene glycol dimethacrylate , thermogravimetry , thermal stability , methyl methacrylate , chemical engineering , electrochemistry , polymerization , methacrylic acid , chemistry , composite material , electrode , engineering
In order to obtain highly conductive polymer electrolytes for an electric double layer capacitor, three kinds of polymer gel electrolytes were prepared. Vinyl acetate (VAc) and methyl methacrylate (MMA) were copolymerized with divinyl adipate (DA) and ethylene glycol dimethacrylate (EGDMA), respectively, in propylene carbonate (PC) containing tetraethylammonium tetrafluoroborate (TEATFB) to form network polymer gel electrolytes. MMA was also copolymerized with butylene glycol DMA for comparison. The polymer gel electrolytes obtained were characterized by means of thermogravimetry, complex impedance analysis, and cyclic voltammetry for use in the electric double layer capacitor. The ionic conductivities of the polymer gel electrolytes were dependent on the TEATFB concentration, temperature, and crosslinking degree. The polymer gel electrolytes in the VAc‐DA system exhibited higher room temperature conductivities (10 −2 S/cm) than those in the MMA‐EGDMA system. Further, the polymer gel electrolytes in the VAc‐DA system showed good electrochemical stability windows ranging from −4.0 to 4.0 V versus Ag. Thermal analysis revealed that the polymer gel electrolytes in both systems were stable up to 150°C. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 76: 12–18, 2000

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