Kisuk Kang
Kisuk Kang
Seoul National University, South Korea
Halides have emerged as a new class of solid electrolytes that can deliver a superionic conductivity comparable to that of state-of-the-art sulfide electrolytes and the electrochemical stability suitable for high-voltage (> 4V) operations. While these merits have led to an extensive exploration of various halide-based materials in recent years, the understandings of the superionic conduction mechanism and its structure dependency remain in their infancy, impeding a rational design of new halide electrolytes. In this presentation, I will discuss the fundamental lithium transport mechanisms in halide superionic conductors, focusing on two representative structural types: the trigonal hexagonal-close-packed (hcp) and monoclinic cubic-close-packed (ccp) phases of LixMyClz (M = Y, Sc, Er, Zr, etc.). Our findings reveal unique structure–property relationships in each framework, providing general design principles for next-generation halide superionic conductors for all-solid-state lithium batteries.
Kisuk Kang is a professor of materials science and engineering at Seoul National University (SNU), where he received his B.Sc. He completed his Ph.D. and postdoctoral studies at the Massachusetts Institute of Technology. He was a professor at KAIST (Korea Advanced Institute of Science and Technology) until 2011 and moved to SNU. Since 2013, he has been a tenured professor at SNU. His research laboratory focuses on developing new materials for batteries and electrocatalysts using combined experiments and ab initio calculations. His published works in this field have been cited more than 22,000 times, and he was selected as Highly Cited Researchers in 2018 from Clarivate Analytics. He was a recipient of several awards such as Energy and Environmental Science Lectureship Award from Royal Society of Chemistry, United Kingdom (2012), Science Patriots Award from Ministry of Science, Korea (2017), Scientist of the Month from Ministry of Science, Korea (2017), and was selected as 100 leaders in Technology by National Academy of Engineering of Korea (2017). He is now a director of Center for carborganic energy materials, and a director of Center of Samsung SDI-SNU rechargeable batteries. He is also serving as a Board of Directors of Materials Research Society and an associate editor of Journal of Materials Chemistry A in Royal Society of Chemistry.