Study of oxygen reduction mechanism on Ag modified Sm_1.8Ce_0.2CuO₄ cathode for solid oxide fuel cell

Li-Ping Sun (1) , Qiang Li (1) , Hui Zhao (1) , Li-Hua Huo (1) , Jean-Paul Viricelle (2, 3, 4) , Christophe Pijolat (2, 3, 4)

1 KLFIMC - Key Laboratory of Functional Inorganic Material Chemistry
2 SPIN-ENSMSE - Centre Sciences des Processus Industriels et Naturels
3 LGF-ENSMSE - Laboratoire Georges Friedel
4 PRESSIC-ENSMSE - Procédés et REactivité des Systèmes Solide-gaz, Instrumentation et Capteurs

Different amount of metal silver particles are infiltrated into porous Sm_1.8Ce_0.2CuO₄ (SCC) scaffold to form SCC-Ag composite cathodes. The chemical stability, microstructure evolution and electrochemical performance of the composite cathode are investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM), and AC impedance spectroscopy respectively. The composite cathode exhibits enhanced chemical stability. The metal Ag remains un-reacted with SCC and Ce_0.9Gd_0.1O_1.95 (CGO) at 800 °C for 72 h. The polarization resistance of the composite cathode decreases with the addition of metal Ag. The optimum cathode SCC-Ag05 exhibits the lowest area specific resistance (ASR, 0.43 Ω cm

Mots clés: Solid oxide fuel cell; Silver infiltration; Composite cathode; Electrode reaction

Domaines: Génie des procédés

Li-Ping Sun, Qiang Li, Hui Zhao, Li-Hua Huo, Jean-Paul Viricelle, et al.. Study of oxygen reduction mechanism on Ag modified Sm_1.8Ce_0.2CuO₄ cathode for solid oxide fuel cell. International Journal of Hydrogen Energy, 2013, 38 (32), pp.14060-14066. ⟨10.1016/j.ijhydene.2013.08.069⟩. ⟨hal-00957382⟩