1 research outputs found
Ultrafine, Dual-Phase, Cation-Deficient PrBa<sub>0.8</sub>Ca<sub>0.2</sub>Co<sub>2</sub>O<sub>5+δ</sub> Air Electrode for Efficient Solid Oxide Cells
Nanostructured air electrodes play a crucial role in
improving
the electrocatalytic activity of oxygen reduction and evolution reactions
in solid oxide cells (SOCs). Herein, we report the fabrication of
a nanostructured BaCoO3-decorated cation-deficient PrBa0.8Ca0.2Co2O5+δ (PBCC)
air electrode via a combined modification and direct assembly approach.
The modification approach endows the dual-phase air electrode with
a large surface area and abundant oxygen vacancies. An intimate air
electrode–electrolyte interface is in situ constructed with the formation of a catalytically active Co3O4 bridging layer via electrochemical polarization.
The corresponding single cell exhibits a peak power density of 2.08
W cm–2, an electrolysis current density of 1.36
A cm–2 at 1.3 V, and a good operating stability
at 750 °C for 100 h. This study provides insights into the rational
design and facile utilization of an active and stable nanostructured
air electrode of SOCs