Abstract

This work presents a flexible cable-shaped supercapacitor based on carbon fibers (CFs) coated with graphene flakes (GFs) for wearable electronic applications. The CF bundles were adopted as base materials and the GFs were coated on the surface of CFs using a simple dipping method for the enhancement of the specific surface area and the higher conductivity of flexible electrodes. H2SO4 was mixed with poly(vinyl alcohol) (PVA) to form a gel electrolyte, which can prevent leakage. Polydimethylsiloxane (PDMS) was selected as a packaging material to fabricate the proposed flexible supercapacitor due to its flexibility and good thermal and chemical stability. From the electrochemical analysis, the fabricated device exhibited 15.099–6.492 mF/cm2 of specific capacitance and 2.097–0.902 µWh/cm2 of energy density in the range of 50–300 mV/s of scan rate. These values were about 1.9 times larger than the supercapacitor without being coated with the GFs. In addition, the specific capacitance showed small difference of 3.4% between straight and twisted positions, which assures the mechanical stability of the flexible cable-shaped supercapacitor.

Details

Title
A flexible cable-shaped supercapacitor based on carbon fibers coated with graphene flakes for wearable electronic applications
Author
Kim, Jiyoung 1 ; Yin, Junli 2 ; Xing Xuan 1 ; Park, Jae Yeong 1   VIAFID ORCID Logo 

1  Department of Electronic Engineering, Kwangwoon University, Seoul, Republic of Korea 
2  Department of Electronic Engineering, Kwangwoon University, Seoul, Republic of Korea; School of Electrical Engineering, University of South China, Hengyang, Hunan, People’s Republic of China 
Pages
1-7
Publication year
2019
Publication date
Apr 2019
Publisher
Springer Nature B.V.
e-ISSN
22139621
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1186/s40486-019-0083-8
ProQuest document ID
2213125938
Copyright
Micro and Nano Systems Letters is a copyright of Springer, (2019). All Rights Reserved., © 2019. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.