期刊
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
卷 71, 期 -, 页码 184-190出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jiec.2018.11.021
关键词
Graphene flake; PEDOT; Micro-supercapacitor; Gel electrolyte; Pen lithography
资金
- BK21 Plus grant - Korea University
- National Research Foundation (NRF) - Korean government [NRF-2018R1D1A1B07048927]
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 cm(2)) without needing complex processing or a cleanroom environment. Furthermore, performances of three different gel electrolytes (PVA/H2SO4, LiCIO4, 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. (C) 2018 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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