Study on Performance and Preparation of Lanthanum-Strontium-Iron-Chromium Electrodes for Using in Symmetric SOFC

Solid oxide fuel cells (SOFCs) is a transformative energy conversion technology that offers higher efficiency, reliability and environmental friendliness compared to conventional systems. In this study, La0.3Sr0.7Cr0.3Fe0.7O3-δ (LSFCr) was prepared by a sol-gel synthesis route and subsequently applied to a symmetric solid oxide fuel cells (SSOFCs). The LSFCr crystal structure was analyzed by X-ray diffraction (XRD) analysis. In order to reduce the manufacturing cost and simplify the cell structure, the SSOFCs configuration LSFCr|SDC|SSZ|SDC|LSFCr (with SDC buffer layer) - was designed using LSTF electrodes, SDC and SSZ electrolytes. The cell has an Rp of 0.7 Ω cm2 and a PPD of 200 mW cm-2 at 800 °C. Notably, the symmetric cell demonstrated robust stability over five redox cycles and maintained performance integrity in short-term durability evaluations, underscoring its potential to advance SSOFCs technology.