Electrochemical characterizations of microtubular solid oxide fuel cells under a long-term testing at intermediate temperature operation
By Yamaguchi, Toshiaki; Galloway, Kevin V.; Yoon, Jieon & Sammes, Nigel M.
Published in Journal of Power Sources
NULL
2011
Abstract
We report the long-term stability of a microtubular solid oxide fuel cell (SOFC) operable at ∼500 °C. The SOFC consists of NiO–Gd doped ceria (GDC) as the anode as well as the tubular support, GDC as an electrolyte and La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF)–GDC as the cathode. A single tubular cell with a diameter of approximately 1.8 mm and an effective electrode length of approximately 20 mm generated 150 mW cm-2 and 340 mW cm-2 at 500 °C and 550 °C, respectively, under the operation conditions of 0.7 V and humidified H2 fuel flow. The cell exhibited good stability with a degradation rate of 0.25%/100 h under operation conditions of 200 mA and 0.75 V.
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