This issue aims to provide a platform for researchers and engineers to present their latest research findings, share their experiences, and discuss the challenges and opportunities in the field of solid oxide fuel cells (SOFC) and solid oxide electrolysis cells (SOEC). The focus of this issue will be on the design and applications of advanced materials in SOFC/SOEC technology.

We invite original research articles, reviews, and perspectives on the following topics:

High-entropy materials in SOFC/SOEC devices

MIECs and triple-conducting materials in SOFC/SOEC devices

Design and applications of advanced materials in SOFC/SOEC technology

Numerical studies and machine learning in crystal structure characterization and phase diagram design

Modelling and prediction methods for crystal structure refinement and phase diagram construction

Solid oxide fuel cells; Solid oxide electrolysis cells; Advanced materials; High-entropy materials; MIECs; Triple-conducting materials; Numerical studies; Machine learning; Crystal structure characterization; Phase diagram design; Modelling; Prediction methods.