Development status and prospects of solid oxide cell high entropy electrode catalysts

Solid oxide cells (SOCs), as efficient and clean energy conversion devices, enable reversible transforma-⁃ tion between chemical and electrical energy, and hold strategic value in distributed power generation, industrial waste heat recovery, and low -⁃ carbon energy systems. However, conventional electrode materials face trade -⁃ offs between electrocatalytic activity and structural stability. Elemental segregation and interfacial degradation at high temperatures severely reduce efficiency and lifespan. In recent years, high -⁃ entropy engineering has offered new pathways for overcoming performance bottlenecks in electrode materials by leveraging high configurational entropy-⁃ induced effects: configurational entropy effect, lattice distortion effect, sluggish diffusion effect, and the cocktail effect. This review summarizes recent progress in high -⁃ entropy SOC electrodes and explains how the four major entropy-⁃driven effects improve catalytic activity, ion/electron transport, and long-⁃term structural stability. Building on this foundation, this review identifies multi-⁃principal element design as the key to synchronizing interfacial reac-⁃ tion kinetics and thermo -⁃ mechanical durability. This review systematically consolidates recent advances in high -⁃ entropy electrode materials for enhancing critical SOC performance, highlighting their potential in improving elec-⁃ trode activity, poisoning resistance, and thermal stability. Core challenges and emerging opportunities for future research are also discussed.