Abstract
폴리비닐알콜, 규소텅스텐산, 인산 및 수용액으로 구성된 <TEX>$80{\mu}m$</TEX>의 두께의 고분자겔 전해질 필름을 제조하여 활성탄소계 전기이중층 케페시터를 제조하였다. 제조한 고분자겔 전해질 필름은 상온에서 <TEX>$10^{-2}S\;cm^{-1}$</TEX>의 높은 이온전도도를 나타내었으며, 본 전해질 필름을 적용한 활성탄소계 전기이중층 케패시터는 100 mV/s에서 <TEX>$58F\;g^{-1}$</TEX>의 높은 캐패시턴스 특성과 우수한 수명특성을 나타내었다. An electric double-layer capacitor (ELDC) of activated carbon electrode is prepared using a proton-conducting hydrogel polymer electrolyte, which is composed of poly(vinyl alcohol), silicotungstic acid, <TEX>$H_3PO_4$</TEX>, and deionized water. A solid film by evaporating the hydrogel polymer electrolyte is also prepared for comparison. The hydrogel polymer electrolyte also acts as a separator with the thickness of about <TEX>$80{\mu}m$</TEX> and the room-temperature ionic conductivity of <TEX>$10^{-2}S\;cm^{-1}$</TEX>. The EDLC containing the symmetric electrodes of activated carbon shows the specific capacitance of <TEX>$58F\;g^{-1}$</TEX> at <TEX>$100mV\;s^{-1}$</TEX> with a good cycle life, implying that the hydrogel polymer electrolyte is very promising for use in EDLCs.
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