Silver-perovskite composite SOFC cathodes processed via mechanofusion

摘要: Abstract Atomized silver spheres (≈20–50 μm diameter) were coated with 1 μm thick layers of (La 0.6 Sr 0.4 ) 0.98 Co 0.2 Fe 0.8 O 3 or Sm 0.5 CoO via a mechanofusion dry processing method. The materials subsequently assessed as solid oxide fuel cell cathodes on anode-supported YSZ electrolytes at 650–750 °C. subject to significant electrochemical conditioning during initial operation, and factors, such temperature operating voltage, affecting the rate are discussed. Post-conditioned power densities (at 0.7 V) typically 550–650, 400–450 300–350 mW cm −2 750, 700 650 °C, respectively. Though degradation rates ≈7.5 4.5% (per 1000 h) observed 750 700 °C, respectively, no was detected over almost 2000 h testing 650 °C.