High-Temperature Conductivity Measurements of Magnesium-Ion-Conducting Solid Oxide Mg0.5−x(Zr1−xNbx)2(PO4)3(x= 0.15) Using Mg Metal Electrodes

2017 ◽  
Vol 164 (9) ◽  
pp. A2183-A2185 ◽  
Author(s):  
Koichi Kajihara ◽  
Hayato Nagano ◽  
Takaoki Tsujita ◽  
Hirokazu Munakata ◽  
Kiyoshi Kanamura
Keyword(s):  
High Temperature ◽  
Solid Oxide ◽  
Magnesium Ion ◽  
Conductivity Measurements ◽  
Metal Electrodes ◽  
Temperature Conductivity ◽  
Ion Conducting

Electrochemical Investigation of La0.2Sr0.8TiO3+δ-Ce0.8Sm0.2O2-δ Composite Cathode for the Direct High Temperature Steam Electrolysis

2014 ◽  
Vol 936 ◽  
pp. 464-470
Author(s):  
Guo Jian Wu ◽  
Kui Xie ◽  
Yu Cheng Wu
Keyword(s):  
Electrical Conductivity ◽  
High Temperature ◽  
Composite Cathode ◽  
Solid Oxide ◽  
Electrochemical Investigation ◽  
Reducing Gas ◽  
Direct Steam ◽  
Ion Conducting ◽  
High Temperature Steam ◽  
Oxide Ion

This paper investigates a composite cathode La0.2Sr0.8TiO3+δ-Ce0.8Sm0.2O2-δ (LSTO-SDC) for the direct steam electrolysis in an oxide-ion-conducting solid oxide electrolyzer. The dependences of electrical conductivity of the reduced LSTO on temperature and oxygen partial pressure are studied and further correlated to the electrochemical properties of the cathode in symmetric cell LSTO-SDC/YSZ/LSTO-SDC and solid oxide electrolyzer LSTO-SDC/YSZ/LSM-SDC, respectively. Current efficiencies of the solid oxide electrolyzer with LSTO-SDC cathode were found to be 92.38% and 91.17% with or without reducing gas flowing over them under the applied voltage of 1.8 V at 800 °C, respectively.

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