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Highly stable microtubular cells for portable solid oxide fuel cell applications

AuthorsMonzón, Hernán; Laguna-Bercero, M. A.
Yttria stabilized zirconia
Fuel utilizatio
Issue Date2016
CitationElectrochimica Acta 222: 1622-1627 (2016)
AbstractIn this work, extruded support tubes based on Nickel Oxide-YSZ (yttria stabilized-zirconia) were manufactured by Powder Extrusion Moulding (PEM). An YSZ layer is then deposited by dip coating as the electrolyte and subsequently, standard La0.8Sr0.2MnO3-δ (LSM)/YSZ composites were deposited by dip coating as oxygen electrodes. Microstructure of the anode support was optimized in order to achieve the maximum fuel utilization and as a consequence, a high performance of the cells. Experiments as a function of the fuel composition showed power densities above 500 mWcm−2 at 800 °C at 0.7 V, with high fuel utilization (∼75%). Long-term durability studies were also performed for a period above 1000 hours. The experiment was conducted at 800 °C using pure humidified hydrogen at a fixed voltage of 0.8 V. It was observed that the current density of the cell is significantly evolving during the initial period of about 100 hours, as a consequence of reconditioning of nickel particles at the anode support. Once the system is stabilized, no degradation was observed up to 1000 hours under operating conditions, obtaining current densities in the range of 400 mAcm−2 at 0.8 V and 800 °C.
Publisher version (URL)https://doi.org/10.1016/j.electacta.2016.11.150
Identifiersdoi: 10.1016/j.electacta.2016.11.150
issn: 0013-4686
Appears in Collections:(ICMA) Artículos
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