Research Progress on Preparation Technologies and Performance of Straight-pore Electrode Structures for Solid Oxide Cells

Solid oxide cell (SOC) has attracted extensive attention in recent years due to their high-efficiency clean power generation capability in fuel cell (SOFC) mode and excellent hydrogen production and energy storage potential in electrolysis cell (SOEC) mode.Conventional SOC typically employ pore-forming agents such as graphite or carbon powder to fabricate porous electrode supports.This approach results in disordered pore distribution and complex pore structure, leading to high tortuosity factor.Particularly under conditions of dilute fuel or high current densities, these issues cause concentration polarization, limiting further performance improvements.To address these challenges, the application of straight-pore structures has shown significant progress.The ordered pore channels in this structure enhance gas diffusion and transport, reduce concentration polarization, and improve the impregnation efficiency of electrode materials while increasing the utilization of active sites, thereby significantly boosting the electrochemical performance of SOC.This review systematically summarizes recent advancements in the preparation techniques for straight-pore structured SOC.It details the pore-forming mechanisms, process characteristics, and applications of key technologies (phase inversion, freeze-drying, and alginate ion gelation) in both planar and tubular SOC configurations.