A flexible cable-shaped supercapacitor based on carbon fibers coated with graphene flakes for wearable electronic applications

被引：13

作者：

Kim, Jiyoung ^{[1
]}

Yin, Junli ^{[1
,2
]}

Xuan, Xing ^{[1
]}

Park, Jae Yeong ^{[1
]}

机构：

[1] Kwangwoon Univ, Dept Elect Engn, Seoul 01897, South Korea

[2] Univ South China, Sch Elect Engn, Hengyang 421001, Hunan, Peoples R China

来源：

MICRO AND NANO SYSTEMS LETTERS | 2019年 / 7卷 / 01期

关键词：

Flexible supercapacitor; Carbon fibers; Graphene flakes; Gel electrolyte; Wearable electronics; ALL-SOLID-STATE; MICRO-SUPERCAPACITORS; FABRICATION;

D O I：

10.1186/s40486-019-0083-8

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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/cm(2) of specific capacitance and 2.097-0.902 mu Wh/cm(2) 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.

引用

页数：7

共 26 条

[1] Water-Soluble Hybrid Graphene Ink for Gravure-Printed Planar Supercapacitors [J].