화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.71, 184-190, March, 2019
DOI10.1016/j.jiec.2018.11.021  Export Citation
Effect of gel electrolytes on the performance of a minimized flexible micro-supercapacitor based on graphene/PEDOT composite using pen lithography
Hee Uk Lee, Joon-Hyung Jin1, †, and Seung Wook Kim†
  • Department of Chemical and Biological Engineering, Korea University, 5 Ga, Anam-Dong, Sungbuk-Gu, Seoul 136-701, Republic of Korea
  • 1Department of Chemical Engineering, Kyonggi University, 154-42, Gwanggyosan ro, Yeongtong-gu, Suwon-si, Gyeonggi-do 16227, Republic of Korea
E-mail:,
The objective of this study was to fabricate a minimized all solid-state micro-supercapacitor (MSC) with a patterned graphene flake (GF)/polyethylenedioxythiophene (PEDOT) composite electrode using pen lithography. This MSC demonstrated properties of a suitable gel electrolyte. It involved direct writing of GF/PEDOT composite inks with a layer-by-layer assembly and polymerization method by pen lithography on a very small area (0.38 cm2) without needing complex processing or a cleanroom environment. Furthermore, performances of three different gel electrolytes (PVA/H2SO4, LiClO4, and H3PO4) in the MSC were investigated to obtain an MSC with high power density. Results revealed that GF/PEDOT-MSC with PVA/H2SO4 gel electrolyte demonstrated excellent electrochemical features such as maximum operating potential window (1.2 V), specific capacitance of 37.08 mF cm-2, and energy density of 6.4 mWh cm-2 with extended cycling stability up to capacitance retention rate of 89% after 2500 cycles. This study suggests potential applications of these electrode materials for an easy and scalable fabrication of a wide variety of devices.
Keywords:Graphene flake;PEDOT;Micro-supercapacitor;Gel electrolyte;Pen lithography
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