BaCO3 Nanoparticles-Modified Composite Cathode with Improved Electrochemical Oxygen Reduction Kinetics for High-Performing Ceramic Fuel Cells

The effects of the electrochemical oxygen reduction reaction (ORR) on surface single-phase perovskite cathodes are well understood, but its potential for use in a complex system consisting different material types is unexplored. Herein, we report how BaCO3 nanoparticles-modified La0.6Sr0.4Co0.2Fe0.8O3-δ-Gd0.2Ce0.8O2-δ (LSCF–GDC)-composite improved kinetics high-performing ceramic fuel cells. Both X-ray diffraction (XRD) and thermogravimetric analysis (TGA) studies reveal that stable, it does not show any solid-state with LSCF–GDC at SOFCs’ required operating temperature. conductivity relaxation (ECR) study reveals during infiltration nanoparticles into LSCF–GDC, exchange (Kchem) enhanced up to factor 26.73. maximum power density NiO-YSZ anode-support cell increased from 1.08 1.48 W/cm2 via modification 750 °C. modified cathode also shows an ultralow polarization resistance (Rp) 0.027 Ω.cm2, which ~4.4 times lower than bare (~0.12 Ω.cm2) Such enhancement can be attributed accelerated process, possibly through promoting dissociation molecules nanoparticles. functional theory (DFT) illustrates interaction mechanism between surface.