主讲人：罗巍，同济大学研究员
时 间：2019年10月27日16:45-17:25
地 点：物电学院A栋219
联系人：鲁兵安
讲座摘要：All-solid-state Li-batteries using solid-state electrolytes (SSEs) offer enhanced safety over conventional Li-ion batteries with organic liquid electrolytes due to the nonflammable nature of SSEs. The superior mechanical strength of SSEs can also protect against Li dendrite penetration, which enables the use of the highest specific capacity (3861 mAh/g) and lowest redox potential (−3.04 V vs standard hydrogen electrode) anode: Li metal. However, contact between the Li metal and SSEs presents a major challenge, where a large polarization occurs at the Li metal/SSE interface. Here, we present two strategies for solving this problem. One is coating an ultra-thin layer of semi-conductor material (Si or Ge), which can effectively change the surface of a promising oxide-based SSE (garnet) from “superlithiophobicity” to “super-lithiophilicity”. The second one is fabricating a Li-graphite composite. As a result, the interfacial resistance between Li and garnet dramatically decreased.
主讲人简介：罗巍，同济大学材料科学与工程学院特聘研究员、博士生导师。回国前担任美国马里兰大学助理研究教授。曾先后于美国俄勒冈州立大学，马里兰大学从事博士后研究。主要研究新型能源材料和器件，在固态锂电池和钠离子电池等领域发表论文60余篇，作为第一作者/共同第一作者/通讯作者的工作发表在Chem. Rev., Acc. Chem. Res., JACS, Adv. Mater., PNAS, Adv. Energy Mater., Nano Lett.等知名期刊上，入选科睿唯安2018年度“高被引科学家”。
