Electrical properties of scheelite structure ceramic electrolytes for solid oxide fuel cells.
- Resource Type
- Article
- Authors
- He, Jianbo; Cheng, Jihai
- Source
- Materials Letters. Dec2017, Vol. 209, p525-527. 3p.
- Subject
- *SCHEELITE
*IMPEDANCE spectroscopy
*ELECTRIC properties of solids
*ELECTROCHEMICAL analysis
*ELECTRIC conductivity
- Language
- ISSN
- 0167-577X
A novel electrolyte based on Gd doped CaMoO 4 with scheelite structure has been investigated. X-ray diffraction results show that the single-phase scheelite structure can be formed at 900 °C. Electrochemical measurement results indicate that the addition of certain quantity Gd 2 O 3 (x = 0.5) can increase the conductivity of CaMoO 4 obviously. The total conductivity of Ca 0.5 Gd 0.5 MoO 4+δ can reach 0.017 S cm −1 at 800 °C. The spectra follow the Arrhenius law with two activation energy 1.636 eV for T < 873 K and 1.364 eV for T > 873 K. Overall, Gd doped CaMoO 4 composite material with scheelite structure directs a new strategy to design novel electrolyte for SOFCs applications. [ABSTRACT FROM AUTHOR]