报告题目：Functional Flexible & Wearable Energy Storage Devices

　　主讲嘉宾：Prof. Zhi Chunyi
             （Department of Materials Science & Engineering, City University of Hong Kong.）

　　报告时间：9月15日（周五）10:00—11:30

　　活动地点：李薰楼356会议室

　　报告简介：

　　Wearable electronic textiles that store capacitive energy are a next frontier in personalized electronics. 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.

　　In addition, we have successfully fabricated an extremely safe, wearable and rechargeable solid-state aqueous electrolyte based battery with a new hierarchical polymer electrolyte (HPE). The HPE works as both an efficient ionic conductor and a highly effective separator, providing high flexibility, high ionic conductivity as well as the excellent safety performance for the battery. This solid state ZIB exhibits a high energy density (14.6 mWh cm−3 normalized to the volume of the whole device), a high specific capacity of 280 mAh g-1 and high capacity retention of 97% after 1000 cycles. Moreover, this battery exhibits high flexibility and greatly enhanced safety performance.

　　主讲嘉宾简介：

　　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 associate professor in Department of Materials Science & Engineering, City University of Hong Kong. Zhi’s research is currently focused on flexible/wearable energy storage devices and sensors etc. He has published more than 190 papers with a citation of >9000 and h-index of 52 (ISI).

　　References:

　　1. Pei and Zhi et al. N, S-enriched hierarchically porous carbon as a highly active reversible oxygen electrocatalyst. Energy & Environmental Science 10, 742 (2017)

　　2. Zhu and Zhi et al. A Highly Durable, Transferable, and Substrate‐Versatile High‐Performance All‐Polymer Micro‐Supercapacitor with Plug‐and‐Play Function. Advanced Materials 29, 1605137 (2017).

　　3. Huang and Zhi et al. A polyacrylamide hydrogel electrolyte enabled intrinsically 1000% stretchable and 50% compressible supercapacitor. Angewandte Chemie International Edition DOI: 10.1002/ange.201705212, (2017).

　　4. Xue and Zhi et al. Photoluminescent Ti3C2 MXene Quantum Dots for Multicolor Cellular Imaging, Advanced Materials 29, 1604847 (2017)

　　5. Pei and Zhi et al. Component Matters: Paving the Roadmap Toward Enhanced Electrocatalytic Performance of Graphitic C3N4-Based Catalysts via Atomic Tuning. ACS Nano 11, 6004 (2017).

　　6. Huang and Zhi et al. Smart Energy Storage Devices. Advanced Materials 28, 8344 (2016).

　　7. Huang and Zhi et al. A self-healable and highly stretchable supercapacitor based on a dual crosslinked polyelectrolyte. Nature Communications 6, 10310 (2015).