EXTENDED ABSTRACT: Transmission Electron Microscopy (TEM) is one of the most powerful tools for materials characterization and the study of structure-performance relationships. Over the past decades, with the rapid advancements in computer science, nanotechnology, and artificial intelligence, TEM has become increasingly indispensable in material research. In this report, I will highlight the progress we have made in the last five years in studying failure mechanisms and structure-performance relationships in layered oxide cathode materials for lithium-ion batteries using AI-aided multidimensional (in situ + 3D) TEM techniques. The main topics include: 1) Shear phase transformation and interface structure of layered oxides; 2) New phase transformation mechanisms and structural degradation induced by shear phase transformation; 3) Discovery of deformation-induced phase transformation mechanisms; and 4) Failure mechanisms of layered oxide cathodes in all-solid-state batteries and their differences from those in liquid batteries.
Keywords：TEM; artificial intelligence; lithium-ion batteries; cathode; layered oxide
REFERENCES:
[1] C.Y. Wang, et al. JACS, 146 (26), (2024) 17712–17718.
[2] C.Y. Wang, et al. Nature Materials, 22 (2), (2023) 235-241.
[3] C.Y. Wang, et al. Matter, 6 (4), (2023) 1265-1277.
[4] C.Y. Wang, et al. Nano Letters, 21 (22), (2021) 9797–9804.
[5] C.Y. Wang, et al. Nano Letters, 21 (8), (2021) 3657-3663.
[6] C.Y. Wang, et al. Matter, 4 (6), (2021) 20163–2026.
Chunyang Wang is a professor&PI at Shenyang National Laboratory for Materials Science (SYNL), Institute of Metal Research, CAS. He received his Ph.D. from IMR, CAS in 2019 and conducted his postdoc research at UC Irvine, and BNL (2019-2023). His team focuses on the development and application of in-situ TEM, electron tomography, cryo-TEM, and AI-aided TEM techniques for battery materials study. He has published ~70 papers in journals including Nature, Nature Materials, Nature Energy, Nature Nanotechnology, PRL, JACS, Matter(3), EES, Advanced Materials, Nano Letters(7), etc. He was elected to the MIT Technology Review Innovators Under 35 (TR35 China) list in 2024. He received MSA Postdoc Scholar Award in 2022. He is a PRP and UEC member of CFN at BNL. He has given >10 invited talks at international conferences or renowned research institutions.