Flexible and Wearable Supercapacitor
Dr. Yan Huang
Department of Physics and Materials Science, City University of Hong Kong
Wearable electronics that store capacitive energy are a next frontier in personalized devices. Stretchability, air-permeability and self-healability as well as functional integration, are required for the potential practical application of such electronics. I will present our work on wearable supercapacitors which have addressed all these requirements. With the use of a plain weaved structure, conducting polymer-based supercapacitor exhibits good tolerance to stretch and extreme stability. By combining nanotechnology with textile technique, yarn supercapacitors have ultrahigh capacitances and energy densities. Thanks to hydrogen-bonding-initiated self-healability, self-healable supercapacitors are successfully fabricated. Especially, supercapacitors exhibit complete self-healability (~100% electrochemical efficiency during all 20 breaking/healing cycles), stretchability (600% strain with enhanced performance) and the fewest number of components by the use of a new polyelectrolyte comprising dual crosslinked polyacrylic acid. Based on two integration strategies of electrode multifunctional material and electrode textile geometry, we integrate supercapacitor-photodetector and supercapacitor-strain sensor systems in a single device.
About the Speaker
Dr. Huang got her Ph.D. degree (2013) in Materials Science from University of Rochester. After that, she started to work as a postdoctoral researcher and then a research fellow in City University of Hong Kong. Her research field is mainly about energy conversion and storage including fuel cells and wearable supercapacitors.
时间: 2016年3月29日上午 9:30-10:30