Synergistic preparation of nano-sized PrBa0.5Sr0.5Co1.5Fe0.5O5+δ-LaCo0.6Ni0.4O3-δ cathodes of solid oxide fuel cells

The study of high performance and stable hierarchical cathodes is essential for practical applications of solid oxide fuel cells (SOFCs). This work presents a synergistic way to prepare hierarchical nano-sized cathodes, focusing on optimizing microstructural and electrochemical properties. By combining advanced fabrication techniques, including nanostructuring and surface engineering, we obtained an enhancement in PrBa0.5Sr0.5Co1.5Fe0.5O5+delta (PBSCF) cathodes. The electrochemical activities of LaCo0.6Ni0.4O3-delta (LCN) impregnated on PBSCF cathodes in SOFCs were fabricated. Here, an optimum coated amount of LCN-PBSCF electrode exhibited a smaller electrode polarization resistance (Rp) of 0.58 Omega cm(2) than that of pure PBSCF electrode with Rp of 1.23 Omega cm(2) operating at 700 degrees C. With the temperature elevating from 600 to 800 degrees C, LCN-PBSCF single cells presented a maximum power density (MPD) rising from 147.07 to 837.86 mW cm(-2), substantially higher relative to pristine PBSCF cell (from 89.34 to 429.82 mW cm(-2)). These results elucidated a rational design of efficient PBSCF-based cathode by LCN impregnation for SOFC.