One-dimensional structured La0.6Sr0.4Co0.2Fe0.8O3−δ - BaCe0.5Zr0.35Y0.15O3−δ composite cathode for protonic ceramic fuel cells

The obtained LSCF-BCZY fibers with well-developed perovskite structures were 90-150 nm in diameter. An anode-supported single cell composed of NiO-BCZY/BCZY/LSCF-BCZY fibrous composite cathode was fabricated, and its electrochemical analysis was performed. The maximum power densities were 537 and 239 mW/cm2 at 700 and 550 °C, respectively, which was ascribed to the excellent properties of the LSCF fibers with embedded BCZY particles such as a highly porous and continuous structure promoting mass transport and charge transfer reactions.