Novel Low Temperature Solid State Fuel Cells

Technical Report · Tue Mar 23 00:00:00 EDT 2010

DOI:https://doi.org/10.2172/1083746· OSTI ID:1083746

Chen, Chonglin ^[1]; Nash, Patrick ^[1]; Liu, Jian ^[1]; Collins, Gregory ^[1]

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1. Univ. of Texas, San Antonio, TX (United States)

We have successfully fabricated (PrBa)Co₂O_5+δ and (LaBa)Co₂O_5+δ epitaxial thin film on various single crystal substrates. Physical and electrochemical properties characterizations were carried out. Highly conductive oxygen-deficient double perovskite LnBaCo₂O⁵⁺ thin films were grown on single crystal (001) SrTiO₃ (STO), (001) MgO, (001) LaAlO₃ and (110) NdGaO₃} substrate by pulsed laser deposition. Microstructure studies from synchrotron X-ray diffraction and Transmission electron microscopy. High temperature transport properties was carried in different atmosphere (O₂,Air, N₂) up to ~900K. Resistance response of (LaBa)Co₂O_5+δ epitaxial thin film was characterized in oxygen, nitrogen and 4% hydrogen over a wide range of temperature from 400 C up to 800 C. To determine the electrode performance and oxygen exchange kinetics of PrBaCo₂O_5+δ, multi-layered thin film based half cell was deposited on LaAlO₃(001) substrate. The temperature dependence of the resistance of this half cell structure was characterized by electrochemical impedance spectroscopy (EIS) within different temperature and gas environments. Anode supported fuel cells, with GCO:YSZ multilayer thin film as electrolyte and PBCO thin film as electrode, are fabricated on tape casted NiO/YSZ substrate. Full cell performance is characterized up to 800 C.

• Research Organization: Univ. of Texas at San Antonio, TX (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: FG26-07NT43063
• OSTI ID: 1083746
• Country of Publication: United States
• Language: English

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