Series of in-fiber graphene supercapacitors for flexible wearable devices

Abstract

An integrated series of in-fiber all-solid-state graphene supercapacitors have been fabricated for flexible wearable electronic devices.

Graphene based metal and metal oxide nanocomposites: synthesis, properties and their applications

“…Recently, graphene has attracted attention as electrode materials in supercapacitors because of its high surface area, chemical inertness, excellent flexibility, and superb electrical conductivity. 313 Single layer graphene exhibits an intrinsic capacitance of ~21 mF cm -2 , and a theoretical (if all the surface area of graphene can be used) electric double layer capacitance of ~550 F g -1 could be achieved. 314 However, a practical use of the whole surface area of graphene is difficult; therefore, graphene has been extensively used in combination with other electrochemically active metal oxides and hydroxides as electrode materials in supercapacitors.…”

Elastomeric and Dynamic MnO2/CNT Core–Shell Structure Coiled Yarn Supercapacitor

“…Nevertheless, most fiber-based supercapacitors (FBSs) simply possess the flexibility with limited tensile strain and stretchability [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] because they are mostly based on nonstretchable electrodes such as carbon nanotube (CNT) spun yarn, 2-7 graphene fiber, [8][9][10][11][12] carbon fiber, 13,14 and metal wire. 15 This lack of stretchability of these FBSs leads to limitation for more advanced utilization, e.g., as a power source for artificial muscles 17 or wearable devices that are exposed to high strain, especially in the joint part.…”

Graphene-based materials for flexible energy storage devices

“…The employment of fiber substrates would compromise the gravimetric and volumetric energy density of the fabricated fiber SCs due to their occupation part of weight and volume of SC devices. In this case, intensive effort s have been made to design graphene-based fiber electrodes for SCs without substrates [85][86][87][88][89][90][91][92][93][94][95][96][97] . An all-solid-state, stretchable fibrous SCs with a unique RGO core-sheath fiber were assembled [91] , in which RGO fiber as core covered with a sheath of 3D porous network-like RGO framework ( Fig.…”