栏目导航  
学院新闻 通知公告 学生活动 克坚学术讲坛 语言文字 相关下载 重庆市力学学会 校友风采
热门文章  
· 【6月23日】Polynomial Dimensional... 2017/06/21
· 【5月15日】穿甲/侵彻力学:1km/s~1... 2017/05/09
· 【5月15日】智能软材料及柔性结构力... 2017/05/09
· 【4月7日】某新型防弹衣的研发 2017/04/06
· 【3月21日】金属纳米线网格的焦耳热... 2017/03/20
联系我们  
 
当前位置: 网站首页 >> 克坚学术讲坛 >> 正文

上一条:【12月21日】Electrospun Nanos... 下一条:【12月11日】 Aviation Propuls...

关闭

【12月21日】Studies on the failure problems in core/shell structured energy materials

2015-12-15 14:53  点击:[]

题目:Studies on the failure problems in core/shell structured energy materials: from observation through understanding to optimization

报告人:Dr. Haimin Yao Department of Mechanical Engineering, Hong Kong Polytechnic University

报告时间:2015年12月21日(星期一)上午11:10-11:30

报告地点:主教504会议室

报告简介:

Anode materials for lithium ion batteries (LIBs) with large specific capacity such as silicon (Si) and tin dioxide (SnO2) tend to have large volume expansion during lithiation, resulting in a series of failure problems such as pulverization of the anode materials and fracture of solid-electrolyte interphase (SEI) layer. To mitigate these adverse effects, recently core/shell structured materials were developed and applied as anode materials for LIBs. In this talk, based on the in-situ TEM observations, we find that if the core/shell structures have not been designed well, failure problems, instead of being prohibited, would be stimulated and even aggravated. Fracture mechanics is applied to understand the mechanism of two coating-related failure phenomena observed in two core/shell structured anode materials. One is the thickness-dependent fracture of the amorphous carbon coating of SnO2 nanowires while the other is the fracture of silicon nanoparticles evoked by its carbon coating. Our results not only provide insight into the effects of coating on active materials but will be of great value to the design and optimization of the core/shell structured anode materials for high performance LIBs

报告人简介:

Dr. Haimin Yao is currently an Assistant Professor in the Department of Mechanical Engineering at theHong KongPolytechnicUniversity. He received his BEng and MEng degrees in Solid Mechanics fromTsinghuaUniversityin 2000 and 2002 respectively. He subsequently went toGermanyand studied in the Max-Planck Institute for Metals Research. In 2006, he obtained his Doctor degree in Chemistry from Universität Stuttgart. Then he moved toUSAand worked as a postdoctoral Research Associate atBrownUniversityand subsequently at Massachusetts Institute of Technology. In 2011, he joined the Department of Mechanical Engineering of theHong KongPolytechnicUniversity. The research interests of Dr. Yao include bio-inspired mechanics and materials, and mechanical behaviors of energy storage materials. He has published more than 40 papers on the top multi-disciplinary journals such as PNAS, Scientific Reports, Journal of Royal Society Interface, CARBON and the top journals in solid mechanics such as JMPS, IJSS and JAM. So far, his works have been cited for more than 1,200 times.

版权所有 © 2014 重庆大学 - 航空航天学院 版权所有
渝ICP备05005908号  电话:65102521 招生电话:65102523  传真:65102521
技术支持:重庆在沃科技有限公司