Synthesis of Nanostructured Metal Oxide Materials and Their Application in Li-ion Batteries
讲座名称：
Synthesis of Nanostructured Metal Oxide Materials and Their Application in Li-ion Batteries
讲座时间：
2011-12-19
讲座人：
楼雄文
形式：
校区：
兴庆校区
实践学分：
讲座内容：
应西安交通大学理学院丁书江副教授的邀请，新加坡南洋理工大学纳米结构材料及电化学研究领域著名学者楼雄文 (David Lou X. W.)博士于2011年12月19日访问我校并作学术报告。
题目：Synthesis of Nanostructured Metal Oxide Materials and Their Application in Li-ion Batteries
时间：2011年12月19日(周一) 上午10:00
地点：科学馆207
Abstract
Lithium-ion batteries (LIBs) power millions of laptop computers and other portable electronics. Despite great commercial success, the performance of LIBs based on current electrode materials is approaching its limit. High-energy density and high-power LIBs with greater safety are also vitally important for widespread use of electric cars, which have regained interest recently in view of fast depletion of fossil fuels and associated environmental concerns and climate change. Therefore, there is an urgent need to develop new high-performance electrode materials with significantly higher capacities and/or power densities for next-generation LIBs.
In this talk, I will briefly discuss three types of metal oxides based on three different lithium storage mechanisms. (i) Specifically, we have synthesized hollow SnO2 nanostructures by both templating and template-free methods, and further engineered them into SnO2-carbon composite hollow structures to achieve significantly improved lithium storage properties. (ii) We also try to improve the lithium insertion properties of TiO2 by engineering the crystal facets in view of the fact that lithium insertion in TiO2 is anisotropic. In particular, anatase TiO2 in the form of nanosheet with exposed (001) facets is an ideal host structure for this purpose. We verified this hypothesis by both experimental measurement and theoretical calculation. (iii) We have also demonstrated the concept for conversion reaction compounds (e.g., Fe2O3) showing that the cycling performance can be improved by creating a porous/hollow structure. Lastly, I will briefly talk about some of our recent works about metal oxide-carbon (graphene and CNTs) hybrid materials.
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