Electric double-layer capacitor composed of activated carbon fiber cloth electrodes and solid polymer electrolytes containing alkylammonium salts

Journal Article · Fri Jul 01 04:00:00 EDT 1994 · Journal of the Electrochemical Society; (United States)

DOI:https://doi.org/10.1149/1.2054995· OSTI ID:7016784

Ishikawa, Masashi; Morita, Masayuki; Ihara, Mitsuo; Matsuda, Yoshiharu ^[1]

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1. Yamaguchi Univ., Ube (Japan). Dept. of Applied Chemistry and Chemical Engineering

Solid polymer electrolytes consisting of complexes of poly(ethylene oxide)-grafted poly(methyl)-methacrylate (PEO-PMMA) and tetraalkylammonium salts [tetrabutylammonium perchlorate, tetraethylammonium perchlorate, and tetraethylammonium tetrafluoroborate (TEABF[sub 4])] have been investigated for electric double-layer capacitors with activated carbon fiber cloth electrodes. The PEO-PMMA and tetraalkylammonium composites obtained showed high ionic conductivity (>10[sup [minus]4] S cm[sup [minus]1] at 298 K). The ionic conductivity depended on both the concentration and the size of each ion. The composites had good stability over a wide potential range (ca. 5.0 V). When the PEO-PMMA and TEABF[sub 4] composites were used in solid-state electric double-layer capacitors with activated carbon fiber cloths as polarizable electrodes, the capacitors showed charge/discharge behavior with large values of capacitance and high coulombic efficiency. The long voltage retention was observed in the self-discharge test of the capacitor with TEABF[sub 4].

• OSTI ID: 7016784
• Journal Information: Journal of the Electrochemical Society; (United States), Journal Name: Journal of the Electrochemical Society; (United States) Vol. 141:7; ISSN JESOAN; ISSN 0013-4651
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360606* -- Other Materials-- Physical Properties-- (1992-)
42 ENGINEERING
426000 -- Engineering-- Components
Electron Devices & Circuits-- (1990-)
AMMONIUM COMPOUNDS
CAPACITORS
DESIGN
ELECTRIC CONDUCTIVITY
ELECTRICAL EQUIPMENT
ELECTRICAL PROPERTIES
ELECTROLYTES
EQUIPMENT
GRAFT POLYMERS
IONIC CONDUCTIVITY
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PERFORMANCE
PHYSICAL PROPERTIES
POLYMERS
SOLID ELECTROLYTES