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The actual work focuses on the development of electrochemically active and stable electrodes for a high temperature proton-conducting electrolyte with a perspective of application in intermediate temperature electrochemical devices. The comparative study of the electrochemical performance of the La 1.7 M 0.3 NiO 4+ Оґ вЂ“ based (M = Ca, Sr, Ba) composite cathodes with proton-conducting BaCe 0.89 Gd 0.1 Cu 0.01 O 3 or oxygen-ion-conducting Ce 0.8 Sm 0.2 O 1.9 ceramic components in contact with the proton-conducting electrolyte BaCe 0.89 Gd 0.1 Cu 0.01 O 3 was performed by an impedance spectroscopy in wet air during 1500 h. The composites were used as functional layers in bi-layered electrodes with current collector layers made of 98 wt.% LР°Ni 0.6 Fe 0.4 O 3 + 2 wt.% CuO or 99.4 wt.% La 0.6 Sr 0.4 MnO 3 + 0.6 wt.% CuO.

The Influence of the Substituting Element (M = Ca, Sr, Ba) in La1.7M0.3NiO4+δ on the Electrochemical Performance of the Composite Electrodes