Cathode water management towards improved performance of protonic ceramic fuel cells

Tuning proton kinetics in BaCo0.4Fe0.4Zr0.2–XYXO3–δ triple ionic-electronic conductors via aliovalent substitution

“…In BCFZY0.1 and BCFY, the addition of water vapor decreased k O,chem across all temperatures, while D O,chem remains approximately the same, consistent with a previous study of BCFZY0.1, 60 and suggesting decreased ORR in humidified conditions, also observed in other materials. 61–63 In contrast, for BCFZ at temperatures ≤600 °C, the relaxation time decreased and k O,chem increased in humidified conditions, suggesting that water vapor improved the ORR at lower temperatures. Fig.…”

Rational Design of Ruddlesden–Popper Perovskite Ferrites as Air Electrode for Highly Active and Durable Reversible Protonic Ceramic Cells

“…5 g, h) of the deteriorating SF electrode over time provides further evidence of continuously increasing LF and MF peak resistances. Since these revelations correlate to surface and bulk processes, excessive hydration likely hinders oxygen exchange and diffusion by occupying lattice oxygen sites and vacancies [ 73 ]. While initially enhancing performance, unrestrained hydration can thus degrade long-term stability.…”

Exploring the potential of triple conducting perovskite cathodes for high-performance solid oxide fuel cells: a comprehensive review

“…29 Zhou et al tuned the content of water and oxygen by controlling the air flow rate, and found that the peak power densities (PPDs) of different materials were all increased under the suitable air flow rate. 53…”