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Language: korean

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received July 2, 2013
Accepted August 4, 2013
Available online October 1, 2013

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Poly(acrylonitrile) 부직포 분리막에 코팅된 하이드로겔 고분자 전해질을 포함하는 활성탄 수퍼커패시터 특성

Electrochemical Properties of Activated Carbon Supecapacitor Containing Poly(acrylonitrile) Nonwoven Separator Coated by a Hydrogel Polymer Electrolyte

모하메드 라티파투 고장면^† 이영기¹ 김광만^1† 조정대² 장윤석² 유정준³ 김종휘³

Mohammed Latifatu Jang Myoun Ko^† Young-Gi Lee¹ Kwang Man Kim^1† Jeongdai Jo² Yunseok Jang² Jung Joon Yoo³ Jong Huy Kim³

한밭대학교 화학생명공학과, 305-719 대전광역시 유성구 동서대로 125 ¹한국전자통신연구원 부품소재연구부문 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, 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 & Materials, 156 Gajeongbuk-ro, Yuseong-gu, Daejeon 305-343, Korea ³Energy Storage Department, Energy Efficiency and Materials Research Division, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 305-343, Korea

jmko@hanbat.ac.kr

Korean Chemical Engineering Research, October 2013, 51(5), 550-555(6)
https://doi.org/10.9713/kcer.2013.51.5.550

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Abstract

6M KOH 수계 전해액에 potassium poly(acrylate) (PAAK)를 3 wt% 포함시켜 제조한 하이드로겔을 poly(acrylonitrile) 부직포 분리막에 코팅하고, 이를 활성탄 수퍼커패시터의 분리막 및 전해질로 사용하여 수퍼커패시터의 고율특성 향상을 시도하였다. 이 분리막 및 전해질은전자현미경 관찰 결과 PAAK 하이드로겔이 부직포의 표면기공에 균일하게 코팅되어 있으며, 24일 동안 하이드로겔의 합습도가 230% 이상으로 균일하게 유지되었고, 6 M KOH 전해액을 사용한 경우(3.6×10^(-2) S cm^(-1))보다 약간 낮은 2.9×10^(-2) S cm^(-1)의 이온전도도를 나타내었다. 활성탄을 활물질로 사용한 대칭형 수퍼커패시터에 이 분리막 및 전해질을 채택한 경우 사이클릭볼타메트리 시험에서 1000 mV s^(-1)의 고속스캔 조건에서도 27 F g^(-1)이상의 높은 비축전용량과 1000 사이클 경과후에도 97% 이상의 유지율을 나타내는데, 이는 부직포 상에 코팅된 PAAK 하이드로겔 전해질이 활성탄 전극과 부직포 분리막 사이에서 강력한 계면밀착을 유지할 수 있기 때문이다.

A hydrogel electrolyte consisting of potassium poly(acrylate) (PAAK) (3 wt%) in 6 M KOH aqueous solution is coated on poly(acrylonitrile) nonwoven separator to examine high-rate characteristics of activated carbon supercapacitor adopting the separator. The hydrogel is homogeneously coated on the surface pores of the nonwoven separator. The electrolyte uptake of the PAAK hydrogel maintains for 24 days higher than 230% and the coated separator shows_x000D_ slightly lower ionic conductivity (2.9×10^(-2) S cm^(-1)) than that (3.6×10^(-2) S cm^(-1)) of using 6 M KOH only. The activated carbon supercapacitor adopting the coated separator shows a specific capacitance higher than 27 F g^(-1) at 1000 mV s^(-1) and a retention ratio higher than 97% after the 1000th cycle. This is due to strong interfacial contact of coated hydrogel electrolyte between the activated carbon electrode and the nonwoven separator.

Keywords

Poly(acrylonitrile) Potassium Poly(acrylate) Supercapacitor Cyclic Voltammetry Specific Capacitance

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