Handbook of Graphene, Volume 5 by Unknown

Author:Unknown
Language: eng
Format: epub
ISBN: 9781119469735
Publisher: John Wiley & Sons, Incorporated
Published: 2019-06-10T14:14:00+00:00

Chapter 8

Graphene-Based Flexible Actuators, Sensors, and Supercapacitors

Chao Lu2 and Wei Chen1,2*

1Research Centre for Smart Wearable Technology, Institute of Textile and Clothing, The Hong Kong Polytechnic University, Hong Kong, PR China

2i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, PR China

*Corresponding author: [email protected]; [email protected]

Abstract

Graphene, which is composed of one-atom-thick two-dimensional carbon sheets with a covalently bonded honeycomb structure, has attracted great attention of researchers from various fields in decades because of its unique chemical, physical, and mechanical properties. Ionic polymer graphene composite (IPGC) is a kind of ionic transducer, which are composed of a layer of polymer electrolyte sandwiched between two graphene electrode layers. Interestingly, it could realize energy storage and conversion process as well as pressure recognition through ion migration caused by external stimulus. Thus, it has great value of application in electrochemical actuators, piezoionic sensors, and supercapacitors by virtue of its high conductivity, large specific surface area, tunable electronic properties, and chemical stability. This chapter gives a thorough review as well as in-depth descriptions of graphene-based flexible actuators, sensors, and supercapacitors, respectively, according to works of our group as well as others. We summarized applications of pristine graphene in the three categories and discussed how the structural regulations would influence material activity and device performance. Finally, we gave a general outlook on textile and fiber-based IPGC devices, which will show enormous application in wearable electronic devices, and make some discussions about the transformation of research results into real-life applications.

Keywords: Ionic polymer graphene composite, actuators, sensors, supercapacitors, ionic transducer, wearable electronics, space recognition, health detection

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