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- Title
Unveiling crystal orientation-dependent interface property in composite cathodes for solid-state batteries by in situ microscopic probe.
- Authors
Lee, Sunyoung; Park, Hayoung; Kim, Jae Young; Kim, Jihoon; Choi, Min-Ju; Han, Sangwook; Kim, Sewon; Kim, Wonju; Jang, Ho Won; Park, Jungwon; Kang, Kisuk
- Abstract
A critical bottleneck toward all-solid-state batteries lies in how the solid(electrode)-solid(electrolyte) interface is fabricated and maintained over repeated cycles. Conventional composite cathodes, with crystallographically distinct electrode/electrolyte interfaces of random particles, create complexities with varying (electro)chemical compatibilities. To address this, we employ an epitaxial model system where the crystal orientations of cathode and solid electrolyte are precisely controlled, and probe the interfaces in real-time during co-sintering by in situ electron microscopy. The interfacial reaction is highly dependent on crystal orientation/alignment, especially the availability of open ion channels. Interfaces bearing open ion paths of NCM are more susceptible to interdiffusion, but stabilize with the early formed passivation layer. Conversely, interfaces with closed ion pathway exhibit stability at intermediate temperatures, but deteriorate rapidly at high temperature due to oxygen evolution, increasing interfacial resistance. The elucidation of these distinct interfacial behaviors emphasizes the need for decoupling collective interfacial properties to enable rational design in solid-state batteries. A bottleneck in solid-state batteries is the solid electrode-electrolyte interface being maintained over repeated cycles. Here, the authors use an epitaxial model system to probe and control the interface in real time.
- Subjects
INTERFACIAL reactions; REAL-time control; INTERFACIAL resistance; SOLID electrolytes; CRYSTAL orientation; SOLID state batteries; SUPERIONIC conductors
- Publication
Nature Communications, 2024, Vol 15, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-024-52226-4