Cobalt-free Ba0.5Sr0.5Fe0.8Cu0.1Ti0.1O3−δ as a bi-functional electrode material for solid oxide fuel cells
MetadataShow full item record
In this study, we investigate a cobalt-free titanium-doped perovskite oxide with the nominal composition of Ba0.5Sr0.5Fe0.8Cu0.1Ti0.1O3−δ (BSFCuTi) as a potential electrode material for intermediate temperature solid oxide fuel cells (IT-SOFCs). In comparison to Ba0.5Sr0.5Fe0.9Cu0.1O3−δ, BSFCuTi exhibits improved phase stability and a reduced thermal expansion coefficient even though the electrical conductivity decreases. A low area specific resistance of 0.088 Ω cm2 is achieved at 600 °C based on a symmetrical cell test, which is comparable to the result for the benchmark Ba0.5Sr0.5Co0.8Fe0.2O3−δ cobalt-based perovskite electrocatalyst. Stable operation for a period of 200 h is also demonstrated. The I–V test shows a very high power output of 1.16 W cm−2 for a single cell using a BSFCuTi cathode at 600 °C. In addition, the BSFCuTi can be partially reduced under a reducing atmosphere to prepare a suitable anode material. A cell with BSFCuTi as the material for both electrodes and a thick Gd0.2Ce0.8O1.9 electrolyte (300 μm) delivers an attractive power density of 480 mW cm−2 at 800 °C. The high activity, favorable stability and bi-functionality make BSFCuTi a promising electrode material for IT-SOFCs.
Showing items related by title, author, creator and subject.
Su, Chao; Wang, Wei; Liu, M.; Tadé, Moses; Shao, Zongping (2015)Symmetrical solid oxide fuel cells (SOFCs) have attracted increasing attention due to their potential for improved thermomechanical compatibility of the electrolyte and the electrodes, reduced fabrication cost, and enhanced ...
Su, C.; Wang, W.; Liu, M.; Tadé, M.; Shao, Zongping (2015)© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Symmetrical solid oxide fuel cells (SOFCs) have attracted increasing attention due to their potential for improved thermomechanical compatibility of the electrolyte and ...
Highly active and stable Er0.4Bi1.6O3 decorated La0.76Sr0.19MnO3+δ nanostructured oxygen electrodes for reversible solid oxide cellsAi, N.; Li, N.; He, S.; Cheng, Y.; Saunders, M.; Chen, K.; Zhang, T.; Jiang, San Ping (2017)Bismuth based oxides have excellent ionic conductivity and fast oxygen surface kinetics and show promising potential as highly active electrode materials in solid oxide cells (SOCs) such as solid oxide fuel cells (SOFCs) ...