主讲嘉宾：徐东艳，香港中文大学 机械与自动化工程系 教授　

邀 请 人： 陈跃星 助理教授

时 　间：2023年11月6日上午10：30  

地 　点：粤海校区致原楼1206会议室

报告简介：

With the recent advance of the internet of things, wearable technology, and soft robotics, there is a great interest to develop low-cost energy harvesting devices for converting low-grade heat into electricity and flexible sensors for artificial thermal sensation. In this talk, I will share our recent research efforts in these directions through exploring three effects: (1) thermoelectric effect; (2) thermogalvanic effect; and (3) thermodiffusion effect. Specifically, we developed flexible micro thermoelectric generators (TEGs) with high power density and light weight by integrating pulsed electroplating with microfabrication processes. Compared to traditional electron-based thermoelectric materials, redox couples and ionic thermoelectric (iTE) materials using ions as charge carriers can achieve much larger thermopowers typically on the order of mV/K. Recently, we report polarized electrolytes consisting of I−/I3− redox couple, methylcellulose (MC), and KCl with ultrahigh thermopowers of -8.18 mV/K for n-type and 9.62 mV/K for p-type. Thermoresponsive MC enables polarization switching from n-type to p-type above the gelation temperature, while the giant thermopowers mainly come from the thermogalvanic effect of the I−/I3− redox couple enhanced synergistically by MC and KCl. We also developed an iTE hydrogel with a thermopower of 24.17 mV/K and flexible thermal sensor arrays for human-machine interaction.

嘉宾简介：

徐东艳教授现任香港中文大学机械及自动化工程系教授。她在清华大学和范德比尔特大学获得学士、硕士和博士学位。之后，她在加州大学伯克利分校和劳伦斯伯克利国家实验室从事两年博士后工作。她于2010年加入香港中文大学担任助理教授，并于2016年晋升为副教授，并于2022年晋升为教授。她目前的研究兴趣包括热电材料和器件、热电电池、离子热电材料、纳米级热传输、沸腾传热、柔性压力和热传感器。

欢迎各位老师和同学参加！