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Received March 5, 2014
Accepted April 2, 2014
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하이드로겔 고분자 전해질이 코팅된 술폰화 폴리프로필렌 격리막을 포함하는 활성탄 수퍼커패시터 특성
Electrochemical Properties of Activated Carbon Supecapacitor Containing Sulfonated Polypropylene Separator Coated with a Hydrogel Polymer Electrolyte
Choong Sub Yoon
Jang Myoun Ko†
Mohammed Latifatu
Hae Soo Lee
Young-Gi Lee1
Kwang Man Kim1
Jung Ha Won
Jeongdai Jo2
Yunseok Jang2
Jong Huy Kim3
한밭대학교 화학생명공학과/신소재공학과, 305-719 대전광역시 유성구 동서대로 125 1한국전자통신연구원 전력제어소자연구실, 305-700 대전광역시 유성구 가정로 218 2한국기계연구원 인쇄전자연구실, 305-343 대전광역시 유성구 가정북로 156 3한국에너지기술연구원 에너지저장연구단, 305-343 대전광역시 유성구 가정로 152
Department of Chemical and Biological Engineering/Adranced Materials Eng., Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 305-719, Korea 1Research Section of Power Control Devices, Electronics & Telecommunications Research Institute (ETRI), 218 Gajeong-ro, Yuseong-gu, Daejeon 305-700, Korea 2Department of Printed Electronics, Korea Institute of Machinery and Materials (KIMM), 156 Gajeongbuk-ro, Yuseong-gu, Daejeon 305-343, Korea 3Energy Storage Department, Korea Institute of Energy Research (KIER), 152 Gajeong-ro, Yeseong-gu, Daejeon 305-343, Korea
jmko@hanbat.ac.kr
Korean Chemical Engineering Research, October 2014, 52(5), 553-557(5), 10.9713/kcer.2014.52.5.553 Epub 1 October 2014
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Abstract
폴리프로필렌(PP) 격리막의 표면을 황산-acetone 알돌 응축반응을 통해 술폰화 폴리프로필렌(S-PP) 격리막을 제조하고 표면기 분석과 접촉각 측정을 통해 -SO3H 그룹이 다량 분포된 친수성 표면으로 전환되었음을 밝혔다. 또한 potassium polyacrylate (PAAK) 하이드로겔 고분자 전해질로 S-PP 표면을 코팅하고 이를 활성탄 수퍼커패시터에 적용하여 그 전기화학적 특성을 조사하였다. 결과적으로 S-PP 격리막은 친수성 표면으로 인하여 비록 전기화학적 안정성은 감쇠하지만, 접촉각 감소, 젖음성 향상, 전해질 함침량 증대, 이온전도도 향상, 계면저항 감소 등의 효과를 발생시켜 결국 커패시터적 특성의 향상, 즉 비축전용량과 사이클 수명의 향상을 구현할 수 있다.
Sulfonated polypropylene (S-PP) is prepared by sulfuric acid-acetone aldol condensation reaction of polypropylene (PP) separator to yield hydrophilic separator surface with a moderate amount of -SO3H groups. Activated carbon supercapacitor is also fabricated adopting the S-PP separator coated with potassium polyacrylate (PAAK) hydrogel polymer electrolyte. As a result, the hydrophilic surface of S-PP separator involves better physical and electrochemical properties such as decrease in contact angle, improvements of wettability, electrolyte uptake, and ionic conductivity to give higher specific capacitance and long cycle-life.
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Sowa MG, Fischer D, Eysel HH, Mantsch HH, J. Mol. Struct., 379(1-3), 77 (1996)
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Myhre CEL, Christensen DH, Nicolaisen FM, Nielsen CJ, J. Phys. Chem. A, 107(12), 1979 (2003)
