KEIDS4-1649
Interface Engineering of Layered Cathodes for High-Energy Lithium-Ion Batteries
Topic
IDS4. Advanced Battery Materials and Interface Engineering for Next-Generation Batteries (Sponsored by EcoPro BM)
When and Where
Sep 29, 2026
15:00 - 15:25
Room 202
Session Chairs
Nam-Yung PARK
Presenter(s)
Junyoung Mun (Sungkyunkwan University)
Co-Author(s)
Abstract
The growing concerns over global warming, increasing energy consumption, and the expanding integration of renewable energy sources have significantly increased the importance of lithium-ion batteries (LIBs) as advanced energy-storage systems. Among the key battery components, cathode materials play a particularly critical role in determining both the energy density and overall cost of LIBs, creating a strong demand for further improvements in their performance and stability.
Layered oxide cathodes offer high reversible capacities through the extraction and insertion of large amounts of lithium. However, deep delithiation, particularly at high states of charge, induces substantial structural and chemical instability. Such degradation is often initiated or accelerated at the cathode surface and interface, where structural reconstruction, electrolyte decomposition, and interfacial side reactions can collectively increase resistance and promote irreversible capacity loss.
In this presentation, the degradation mechanisms of layered cathode materials will be discussed with particular emphasis on the interplay between bulk structural evolution and interfacial instability. Based on these fundamental considerations, both engineering and scientific approaches for controlling cathode interfaces will be presented. Particular attention will be given to electrolyte design and functional interfacial modification strategies tailored to different operating-voltage regimes. Through these approaches, the presentation will highlight how rational control of cathode–electrolyte interfaces can mitigate structural degradation and parasitic reactions, thereby enabling more stable operation of high-energy layered cathode materials.
Layered oxide cathodes offer high reversible capacities through the extraction and insertion of large amounts of lithium. However, deep delithiation, particularly at high states of charge, induces substantial structural and chemical instability. Such degradation is often initiated or accelerated at the cathode surface and interface, where structural reconstruction, electrolyte decomposition, and interfacial side reactions can collectively increase resistance and promote irreversible capacity loss.
In this presentation, the degradation mechanisms of layered cathode materials will be discussed with particular emphasis on the interplay between bulk structural evolution and interfacial instability. Based on these fundamental considerations, both engineering and scientific approaches for controlling cathode interfaces will be presented. Particular attention will be given to electrolyte design and functional interfacial modification strategies tailored to different operating-voltage regimes. Through these approaches, the presentation will highlight how rational control of cathode–electrolyte interfaces can mitigate structural degradation and parasitic reactions, thereby enabling more stable operation of high-energy layered cathode materials.
