Microstructure and electrochemical properties of cathode materials for SOFCs prepared via pulsed laser deposition

Dense La 0.8Sr 0.2MnO 3 (LSM) and La 0.5Sr 0.5CoO 3 (LSC) films were fabricated via pulsed laser deposition (PLD) on different substrates. The crystal structures of the films were characterized via in situ X-ray diffraction and the in-plane electrical properties by impedance spectroscopy from room t...

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Veröffentlicht in:Journal of power sources 2006-10, Vol.161 (1), p.250-255
Hauptverfasser: Koep, Erik, Jin, Chunming, Haluska, Michael, Das, Rupak, Narayan, Roger, Sandhage, Ken, Snyder, Robert, Liu, Meilin
Format: Artikel
Sprache:eng
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Zusammenfassung:Dense La 0.8Sr 0.2MnO 3 (LSM) and La 0.5Sr 0.5CoO 3 (LSC) films were fabricated via pulsed laser deposition (PLD) on different substrates. The crystal structures of the films were characterized via in situ X-ray diffraction and the in-plane electrical properties by impedance spectroscopy from room temperature to 700 °C. While the ablated films appeared to grow in the perovskite phase with the appropriate electrical properties when the substrate temperature was greater than 500 °C, they were amorphous when the substrate temperature was relatively low. Subsequent annealing of amorphous LSM and LSC films in air induced a rapid phase transformation to the perovskite phase. On silicon substrates, this phase transformation occurred at 450 and 600 °C, respectively.
ISSN:0378-7753
1873-2755
DOI:10.1016/j.jpowsour.2006.03.060