时间：2016年4月27日，星期三上午9：30开始
地址：广东工业大学工学3号馆217室材料与能源学院会议室
报告人：香港城市大学 物理与材料科学系 支春義教授及其团队
报告题目：功能柔性和可穿戴超级电容器
Personal profile
Dr. Chunyi Zhi got his PhD degree in physics from institute of physics, Chinese Academy of sciences. After that, he started to work as a postdoctoral researcher in National Institute for Materials Science (NIMS) in Japan, followed by a research fellow in International Center for Young Scientists in NIMS and a permanent position in NIMS as a senior researcher. He is currently an assistant professor in Department of Physics & Materials science, City University of Hong Kong. Zhi’s research field is mainly about synthesis and functionalization of boron nitride nanotubes/nanosheets, polymer composites, as well as flexible/wearable energy storage devices and sensors etc. He has published more than 150 papers with a citation of >6000 and h-index of 45.
Functional Flexible & Wearable Supercapacitor
Wearable electronic textiles that store capacitive energy are a next frontier in personalized electronics. However, the lack of industrially wearable and knittable conductive yarns in conjunction with high capacitance, limits the wide-scale application of such textiles. Here pristine soft conductive yarns are continuously produced by a scalable method with the use of twist-bundle-drawing technique, and are mechanically robust enough to be knitted to a cloth by a commercial cloth knitting machine. Subsequently, we demonstrate a combination of textile industry available conductive yarn and conducting polymers can form a great basement for wearable energy storage devices. For example, a combination of metal oxide and conductive polymer can great enhanced tolerance of stretch-induced performance degradation of stretchable supercapacitors. In case of self-healable PU sheel applied, a yarn supercapacitor can be self-healable. In addition, we demonstrate a new electrolyte comprising polyacrylic acid dual cross-linked by hydrogen bonding and vinyl hybrid silica nanoparticles (VSNPs-PAA) that addresses all the superior functions and provide an ultimate solution to the intrinsic self-healability and high stretchability of a supercapacitor. Supercapacitors with VSNPs-PAA as the electrolyte are self-healed, achieving an excellent healing efficiency of ~100% even after 20 cycles of breaking/healing. By a designed facile electrode fabrication procedure, they are stretched up to 600% strain with performance enhanced. Our research represents a solid progress in portable and wearable multifunctional devices with extreme self-healability and stretchability.
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