美国中佛罗里达大学Yang Yang教授做客第251期化苑讲坛

报告题目：Strengthening of Lightweight Thin-Film Electrodes with Metal-Filaments for Renewable Energy Applications

报 告 人 ：Yang Yang

报告时间：2017年4月24日（周一）上午10:00

报告地点：化学楼二楼一号会议室

邀 请 人 ：夏宝玉教授

报告人简介：

Yang Yang comes from the NanoScience Technology Center, University of Center Florida, US. He studied at Jilin University from 2003 to 2006 and he obtained his PhD degree at Tsinghua University, Beijing, China in January, 2010. During his study at Tsinghua University, his advisor is Prof. Dr. Xiaohui Wang and his dissertation is “Research of TiO₂ Nanotube Arrays Based One Dimensional”. His research interests include the Fabrication of nanostructured films、Renewable energy generation and storage、Solar energy harvesting、Smart and flexible electronics and Ceramic films for solid state electronics. He got the Peter M. and Ruth L. Nicholas Postdoctoral Fellowship in 2012 and the Alexander von Humboldt Postdoctoral Fellowship in 2010.

报告内容：

Metal-filaments strengthened thin-films were rationally designed to serve as freestanding and defective electrodes for renewable energy applications. A transformative nanomanufacturing process was developed to fabricate these thin-film electrodes (mixed oxides of iron group metals) with nanoporous structure and controllable composition in a facile and scalable manner. More specifically, electrodeposition and anodic treatments were employed to produce freestanding and defective NiFe oxides nanoporous layers (NPL). These NPL can be directly used as flexible and additive-free electrodes for renewable energy generation (water splitting) and storage (supercapacitor) applications without using binders, current collector and other additives. Significantly enhanced electrochemical performances were therefore achieved due to the unique merits of these NPL: i) highly porous structure considerably increase the electrode/electrolyte interface, which facilitates the electrochemical reaction; ii) these defective NPL provide a large number of active sites (defects) for electrochemical reactions; iii) residual metal-filaments in the NPL form an interconnected conductive framework, which drastically improves the flexibility and conductivity of the electrode.