Enhancing ORR Catalytic Activity and Electrochemical Investigation of La1−2xBaxBixFeO3 Cathode for Low-Temperature Solid Oxide Fuel Cell

Perovskite cathodes have emerged as a promising alternative to traditional cathode materials in low-temperature solid oxide fuel cells (LT-SOFCs) due their exceptional catalytic properties and high oxygen reduction reaction (ORR) activity. Their fast activity chemical stability drawn significant attention lowering the operating temperature of SOFCs. In this study, Ba2+ Bi3+ are doped into LaFeO3. The aim is investigate electrochemical performance LT-SOFCs. presented material characterized terms phase structure, surface morphology, interface studies before being applied SOFCs measure performance. XPS study revealed that La1−2xBaxBixFeO3 (x = 0.1) exhibits enriched vacancies compared 0.2). with 0.1 0.2) delivers peak power density 665 545 mW cm−2 at 550 °C, respectively. Moreover, impedance spectra confirmed x lower electrode polarization resistance (0.33 Ω cm2) 0.2 (0.57 °C. Our findings thus confirm LBBF cathode-based can be considered potential operate low temperatures, it will open up another horizon subject research.