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2014 年 01 月 21 日
Seminar - In-situ TEM study on the carbon coating for lithium ion battery application by Prof. Hongtao WANG

Date:   21 January 2014 (Tuesday)

Time:   11:00 am - 12:00 pm

Venue:  EF305, The Hong Kong Polytechnic University

Abstract:

Nano-compositing is currently being pursued as an important approach in engineering high performance electrode materials for lithium ion batteries. Of the various strategies being adopted, advanced carbonaceous coating plays a unique role due to the multi-functional advantages for both cathodes and anodes arising from use of a single component, such as the high electrical/ionic conductivity, excellent electrochemical stability, and superior mechanical strength. Above all, the carbon source is inexpensive and the coating procedure can readily be achieved and scaled up for industrial application. Although carbon coating has been shown to result in significant improvements in the performance of alloy anodes, there remains a fundamental lack of understanding of the mechanism of strain accommodation. In this talk, I will present in-situ TEM study on the mechanical behaviors of carbon coatings, i.e. wrinkled graphene shells and amorphous carbon shell, which strongly depend on the corresponding crystallinity.

Biosketch:

Dr. HongtaoWang received Ph.D. degrees in Solid Mechanics from Tsinghua University in 2004 and in Applied Physics from Harvard University in 2009. After 2009, he joined Zhejiang University. His research interests focuses on the mechanical properties and deformation mechanisms of small scale solids. He received the NSFC Award for Excellent Young Scientist (2013) (Only 5 scholars were awarded in the field of Solid Mechanics nationwide in 2013.), National Award for Top Yang Talents (2012) (Total 159 people were awarded in all fields of Natural Science nationwide in 2012.) and New Century Excellent Talents in University from Ministry of Education (2009).