Smart utilization of cobaltite-based double perovskite cathodes on barrier-layer-free zirconia electrolyte of solid oxide fuel cells
MetadataShow full item record
Cobaltite-based double perovskite oxides with high electrocatalytic activity and conductivity have been developed as high-performance cathode alternatives for solid oxide fuel cells (SOFCs). However, the use of cobaltite-based double perovskites on Y2O3 stabilized ZrO2 (YSZ)-based SOFCs requires the application of a doped ceria barrier layer. This is due to their poor chemical and physical compatibility with the YSZ electrolyte during high-temperature sintering and fabrication processes. Here we report a viable approach to in operando assemble double perovskites such as PrBa0.5Sr0.5Co1.5Fe0.5O5+d (PBSCF), on YSZ electrolyte and thus effectively form an electrode/electrolyte interface without high-temperature processing. The electrochemical performance of the in situ assembled PBSCF cathode is comparable to that of the cathode prepared by conventional methods. A single cell with an in situ assembled PBSCF-GDC (Gd-doped ceria) cathode achieved a peak power density (PPD) of 1.37 W cm-2 at 750 °C and exhibited a high stability at 500 mA cm-2 and 750 °C for 100 h. Surface and cross-sectional microstructure analysis offer solid evidence that the PBSCF-GDC cathode/YSZ electrolyte interface was formed by electrochemical polarization. This work offers new opportunities to effectively and effortlessly use high-performance double perovskite cathodes in commercial SOFCs.
Funding and Sponsorship
Showing items related by title, author, creator and subject.
Lin, Y.; Ran, R.; Zhang, C.; Cai, R.; Shao, Zongping (2010)The potential application of PrBaCo2O5-d (PBC) double perovskite oxide as a cathode for a proton-conducting solid-oxide fuel cell based on a BaZr0.1Ce0.7Y0.2O 3-d(BZCY) electrolyte was systematically investigated. XRD and ...
Nb and Pd co-doped La<inf>0.57</inf>Sr<inf>0.38</inf>Co<inf>0.19</inf>Fe<inf>0.665</inf>Nb<inf>0.095</inf>Pd<inf>0.05</inf>O<inf>3-d</inf>as a stable, high performance electrode for barrier-layer-free Y<inf>2</inf>O<inf>3</inf>-ZrO<inf>2</inf>electrolyte of solid oxide fuel cellsChen, K.; He, S.; Li, N.; Cheng, Y.; Ai, N.; Chen, M.; Rickard, William; Zhang, T.; Jiang, S. (2018)© 2017 Elsevier B.V. La 0.6 Sr 0.2 Co 0.2 Fe 0.8 O 3-d (LSCF) is the most intensively investigated high performance cathode for intermediate temperature solid oxide fuel cells (IT-SOFCs), but strontium segregation and ...
Enhancing oxygen reduction reaction activity of perovskite oxides cathode for solid oxide fuel cells using a novel anion doping strategyLiu, Y.; Meng, X.; Yu, F.; Yin, M.; Yang, N.; Meng, B.; Sofianos, Veronica; Liu, Shaomin (2018)Possessing a high oxygen reduction reaction (ORR) activity is one of the most important prerequisites for the cathode to ensure an efficient solid oxide fuel cell. Herein, a highly active cathode is developed by doping ...