Thin film nanocrystalline Ba0.5Sr0.5Co0.8Fe0.2O3: Synthesis, conductivity, and micro-solid oxide fuel cells

► First measurement of nanocrystalline BSCF thin film lateral conductivity ► First demonstration of free-standing thin film SOFCs incorporating dense BSCF cathodes ► Maximum power density of 35 mW cm−2 in BSCF/YSZ/Pt thin film SOFCs at 520 °C ► Insights into thin film BSCF/YSZ stability under low temperature annealing conditions.