Electrochemical characteristics of flexible micro supercapacitors with reduced graphene oxide-carbon nanotubes composite electrodes
- Authors
- Yang, Kyungwhan; Cho, Kyoungah; Kim, Sangsig
- Issue Date
- 6월-2018
- Publisher
- ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
- Keywords
- Micro supercapacitors; Reduced graphene oxide; Carbon nanotube; High-scan rate; Flexible supercapacitors
- Citation
- SUPERLATTICES AND MICROSTRUCTURES, v.118, pp.145 - 151
- Indexed
- SCIE
SCOPUS
- Journal Title
- SUPERLATTICES AND MICROSTRUCTURES
- Volume
- 118
- Start Page
- 145
- End Page
- 151
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/75067
- DOI
- 10.1016/j.spmi.2018.04.014
- ISSN
- 0749-6036
- Abstract
- In this study, we fabricate solid-state flexible micro-supercapacitors (MSCs) with reduced graphene oxide-carbon nanotube (rGO-CNT) composite electrodes and investigate the electrochemical characteristics by comparing with those of an MSC with rGO electrodes. Regarding the resistance-capacitance time constant and IR drop, the addition of CNTs into the rGO electrodes shows a significant effect owing to both the decrease in the resistance and the increase in the permeability of the electrolytes. Compared to the rGO MSCs, the rGO-CNT MSCs show an excellent areal capacitance of 2.6 mF/cm(2), a smaller IR drop of 11 mV, a lower RC time constant of 6 ms, and faster charging/discharging rates with a high scan rate ability up to 100 V/s. The mechanical stability of the flexible rGO-CNT MSCs is verified by 1000 bending cycles. In addition, the electrochemical characteristics of the flexible rGO-CNT MSCs are maintained regardless of the MSC array type. (C) 2018 Elsevier Ltd. All rights reserved.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > School of Electrical Engineering > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.