A niobium and tantalum co-doped perovskite cathode for solid oxide fuel cells operating below 500 °C
Citations Over TimeTop 1% of 2017 papers
Abstract
The slow activity of cathode materials is one of the most significant barriers to realizing the operation of solid oxide fuel cells below 500 °C. Here we report a niobium and tantalum co-substituted perovskite SrCo0.8Nb0.1Ta0.1O3-δ as a cathode, which exhibits high electroactivity. This cathode has an area-specific polarization resistance as low as ∼0.16 and ∼0.68 Ω cm2 in a symmetrical cell and peak power densities of 1.2 and 0.7 W cm-2 in a Gd0.1Ce0.9O1.95-based anode-supported fuel cell at 500 and 450 °C, respectively. The high performance is attributed to an optimal balance of oxygen vacancies, ionic mobility and surface electron transfer as promoted by the synergistic effects of the niobium and tantalum. This work also points to an effective strategy in the design of cathodes for low-temperature solid oxide fuel cells.
Related Papers
- → Niobium and Tantalum alloys(1960)59 cited
- → Investigations into the analytical chemistry of tantalum, niobium, and their mineral associates. IV. A new method for the separation of tantalum from niobium. V. The detection and determination of tantalum in niobium compounds(1925)34 cited
- A NEW METHOD FOR DETERMINATION OF NIOBIUM AND TANTALUM(1958)
- Recovery of Tantalum and Niobium from Secondary Material(2002)
- SPECTROCHEMICAL DETERMINATION OF SMALL CONCENTRATIONS OF NIOBIUM AND TANTALUM IN ROCKS(1962)