Lowering the operating temperature of solid oxide fuel cells (SOFCs) is crucial to
make this technology commercially viable. In this context, the electrode e ciency at low
temperatures could be greatly enhanced by microstructural design at the nanoscale. This work
describes alternative microstructural approaches to improve the electrochemical e ciency of the
BaCo0.4Fe0.4Zr0.1Y0.1O3- (BCFZY) cathode. Di erent electrodes architectures are prepared in a
single step by a cost-e ective and scalable spray-pyrolysis deposition method. The microstructure
and electrochemical e ciency are compared with those fabricated from ceramic powders and
screen-printing technique. A complete structural, morphological and electrochemical characterization
of the electrodes is carried out. Reduced values of area specific resistance are achieved for the
nanostructured cathodes, i.e., 0.067 W cm2 at 600 C, compared to 0.520 W cm2 for the same cathode
obtained by screen-printing. An anode supported cell with nanostructured BCFZY cathode generates
a peak power density of 1W cm2 at 600 C.
