New cathode materials for ITSOFC: Phase stability, oxygen exchange and cathode properties of La2-xNiO4+δ
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en
Article de revue
Este ítem está publicado en
Solid State Ionics. 2008, vol. 179, n° 35-36, p. 2000-2005
Elsevier
Resumen en inglés
La2 − xNiO4 + δ (x = 0 ; 0.05) has been prepared by modified Pechini method and characterized by XRD, TGA, SIMS and Electrochemical Impedance Spectroscopy. La2 − xNiO4 + δ phases show no reaction with YSZ at 900 °C for 4 ...Leer más >
La2 − xNiO4 + δ (x = 0 ; 0.05) has been prepared by modified Pechini method and characterized by XRD, TGA, SIMS and Electrochemical Impedance Spectroscopy. La2 − xNiO4 + δ phases show no reaction with YSZ at 900 °C for 4 h. The materials have promising high oxygen diffusion coefficient and surface exchange coefficient. The electrode reaction process is identified to be the reaction rate limiting step at low temperature (T < 700 °C) and small applied d.c. potential, whereas at high temperature (T > 700 °C) and large d.c. potential, it is the interface diffusion process which becomes limiting.< Leer menos
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