报告摘要:

The demand for rechargeable Li batteries having more safety and higher energy density has been increased to meet the strong demand of novel applications such as electric vehicles and energy storage system. In this aspect, Li ion batteries containing typical liquid electrolytes have fundamental limitations because liquid electrolytes can be decomposed at high potential (> 4.5V) leading to the restricted use of high potential cathodes and can act as fuels in thermal runaway behavior leading to a fire or an explosion of battery. To address these problems, there are several approaches. One of promising approaches is to apply proper oxide-based solid electrolytes (SEs) instead of liquid electrolytes because they can enable to deliver superior safety with Li metal and to achieve high energy density simultaneously.

In this talk, I will discuss about the progress of the development of the oxide-based SEs, especially, focusing on the newly developed garnet-type SE that has superior electrochemical/chemical properties with respect to the wettability with Li metal, ionic conductivity, and chemical stability with air and the development of Lisicon-type SE that has superior compatibility with high capacity cathode materials. Also, I will talk about the efforts in our group to build up all solid-state battery by using the developed oxide-based SEs.

报告人简介：

Dr. Byoungwoo Kang is a full Professor in the Department of Materials Science and Engineering (DMSE) and head of DMSE at Pohang University of Science and Technology (POSTECH) in South Korea. He received a B.S. degree in Materials Science and Engineering from Seoul National University, South Korea. After then, he obtained his Ph.D. in Department of Materials Science and Engineering (2010) from MIT, USA. Following the completion of his Ph.D., he worked as a postdoctoral scholar at the same department for 2 years and joined POSTECH at 2011. His current research interest at POSTECH includes (1) developing high-capacity electrode materials by using both cationic and anionic reaction and by using single crystals for Li-ion batteries, and (2) developing oxide-based solid electrolytes and all-solid-state battery by understanding interfacial reactions, utilizing Li metal, and developing integration process. Dr. Kang was the recipient of Young distinguished professor in POSTECH (2021) and Mueunjae Chaired Professor (2024), CAS President’s International Fellowship Initiative (PIFI) (2019).

邀请人：容晓晖（13261555773）