Preparation of an Alkali‐Element‐Doped CeO 2 ‐Sm 2 O 3 System and Its Operation Properties as the Electrolyte in Planar Solid Oxide Fuel Cells
1996; Wiley; Volume: 79; Issue: 12 Linguagem: Inglês
10.1111/j.1151-2916.1996.tb08110.x
ISSN1551-2916
AutoresToshiyuki Mori, Hiroshi Yamamura, Syoshichi Saito,
Tópico(s)Nuclear Materials and Properties
ResumoThe ionic conductivity of the ceria‐samaria (CeO 2 ‐Sm 2 O 3 ) system is higher than that of yttria‐stabilized zirconia and other CeO 2 ‐based oxides. In this study, a small amount of alkali‐element‐doped CeO 2 ‐Sm 2 O 3 solid solution was prepared. This solid solution was characterized by measuring the powder density and the chemical composition. Moreover, its electrochemical properties were investigated in the temperature range from 700° to 1000°C. It was found that a small amount of alkali‐element‐doped CeO 2 solid solution enhanced the ionic conductivity. The power density of an oxygen‐hydrogen fuel cell for alkali‐element‐doped CeO 2 ‐Sm 2 O 3 ceramics exhibited high values at low temperatures such as 700° to 800°C. It is concluded that the improved fuel cell performance can be attributed to the high stability of this composition in the fuel atmosphere.
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