Design of industrially scalable microtubular solid oxide fuel cells based on an extruded support |
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Authors: | H Monzón MA Laguna-Bercero A Larrea BI Arias A Várez B Levenfeld |
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Affiliation: | 1. Instituto de Ciencia de Materiales de Aragón (ICMA), CSIC – Universidad de Zaragoza, C/ María de Luna 3, E-50018 Zaragoza, Spain;2. Dpto. Ciencia e Ingeniería de Materiales, Universidad Carlos III de Madrid, Avda. Universidad 30, 28911 Leganés, Spain |
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Abstract: | The current work describes the adaptation of an existing lab-scale cell production method for an anode supported microtubular solid oxide fuel cell to an industrially ready and easily scalable method using extruded supports. For this purpose, Ni–YSZ (yttria stabilized zirconia) anode is firstly manufactured by Powder Extrusion Moulding (PEM). Feedstock composition, extruding parameters and binder removal procedure are adapted to obtain the tubular supports. The final conditions for this process were: feedstock solid load of 65 vol%; a combination of solvent debinding in heptane and thermal debinding at 600 °C. Subsequently, the YSZ electrolyte layer is deposited by dip coating and the sintering parameters are optimized to achieve a dense layer at 1500 °C during 2 h. For the cathode, an LSM (lanthanum strontium manganite)–YSZ layer with an active area of ∼1 cm2 is deposited by dip coating. Finally, the electrochemical performance of the cell is measured using pure humidified hydrogen as fuel. The measured power density of the cell at 0.5 V was 0.7 W cm−2 at 850 °C. |
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Keywords: | SOFC Powder extrusion moulding Microtubular NiO YSZ |
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