High-performance Gd0.5Sr0.5CoO3− and Ce0.8Gd0.2O1.9 nanocomposite cathode for achieving high power density in solid oxide fuel cells

High power density operation is essential for cost reduction in solid oxide fuel cells (SOFCs), and thus the present work proposes a highly active Gd0.5Sr0.5CoO3−δ (GSC) Ce0.8Gd0.2O1.9 (GDC) nanocomposite cathode intermediate-temperature SOFCs. Its structure formed by using GSC-GDC particles synthesized via spray pyrolysis, which produces uniform-sized secondary consisting of nano-sized GSC GDC crystallites. The resulting has an extensive electrochemically triple-phase boundary electrically conductive networks with dispersed In addition, exhibits performance comparable to high-performance Sm0.5Sr0.5CoO3−δ Ce0.8Sm0.2O1.9 cathode. An anode-supported SOFC achieves remarkably high densities at 0.75 V, i.e., 3.66, 2.60, 1.66, 0.98 W cm−2 800, 750, 700, 650 °C, respectively. These results suggest proposed yields synergistic effect catalytic activity fine structure, leading SOFC.