报告题目： Nanostructured Hybrid Materials

报告时间：2016年6月16日（周四）上午9:30

报告地点：邵科馆一楼圆廊会议室

报告人：  北京大学侯仰龙教授

邀请人：  功能材料研究所 车声雷 教授

报告人简介：

国家杰出青年基金获得者，北京大学教授、博士生导师。主要从事多功能磁性材料、新能源材料的控制合成及其在纳米生物医学与能源领域的应用探索研究。 迄今发表学术论文100余篇，在国际和各类双边会议上作大会或分会邀请报告40余次。荣获北京市科技新星、教育部新世纪优秀人才、北京市优秀人才、霍英东优秀青年教师奖、青年科学之星新人奖、北京茅以升青年科技奖、绿叶生物医药杰出青年学者奖、中国化学会-英国皇家化学会青年化学奖、科技部中青年科技创新领军人才、中国电子学会优秀科技工作者和全国优秀科技工作者。正主持或参加国家自然科学基金重大项目、国家重大基础研究计划（973）等课题。现任Scientific Reports (NPG)、Advanced Science (Wiley)、Science China Materials、Rare Metals等期刊编委，中国材料研究会常务理事、中国化学会理事、中国生物材料学会理事、中国化学会青年化学工作者委员会副主任委员等。

报告内容简述：

Presently, safe energy storage is one of the most demanding technologies by the developing society. In this regard, lithium-based batteries (LBs) have got tremendous attention due to their high energy and power densities and have been considered as promising power source for future electric vehicles (EVs). Thus, most of the present research is focused to develop new electrode materials that can bring the realization of these devices for EVs. However, structural disintegration, limited access to redox sites and loss of electrical contact have long been identified as primary reasons for capacity loss and poor cyclic life of these materials. Although nanotechnology plays critical role by developing nanostructures, simple reduction in size introduces new fundamental issues like side reactions and thermally less stable. Thus, a careful design can inhibit the side reaction by surface protection, make all redox sites accessible by increasing the intrinsic conductivity of the active materials, maintain a continues network for ionic and electronic flow and keep the structural integrity, resulting improved performance and excellent capacity retention with long cyclic life to meet the requirements set by USABC for electrode materials in EVs. Here, we have developed different hybrid nanostructures of metal oxides, nitrides, sulfides, hydroxides and metal alloys with doped graphene to control above mentioned problems and to achieve the goals set by USABC. All these composites possess extraordinary performances as electrodes of LBs with long cyclic stability and excellent rate capability. The high performance of the composites based on the synergistic effect of several components in the nanodesign. These strategies to combine the different property enhancing factors in one composite with engineered structures will bring the realization of these devices in broad markets.