| Autor: |
Liu, Bo, Li, Zongbao, Yang, Xinwei, Yan, Dong, Li, Jian, Jia, Lichao |
| Zdroj: |
Journal of Materials Chemistry A; 9/14/2022, Vol. 10 Issue 34, p17425-17433, 9p |
| Abstrakt: |
Double perovskite material PrBa0.9K0.1Fe1.9Zn0.1O5+δ (PBKFZ) has been designed using the first-principle calculations and synthesized as a new cathode for proton-conducting solid oxide fuel cells. The influence of K-doping on the crystal structure, structure stability, thermal expansion behavior, electronic conductivity, proton uptake, and electrochemical performance has been investigated. PBKFZ presents the P4/mmm space group, and its thermal expansion coefficient is 16.110−6 K−1. The oxygen vacancy concentrations and proton uptake capacity of PrBaFe1.9Zn0.1O5+δ (PBFZ) in wet air (5% H2O) are significantly improved with K doping. The single cell with the PBKFZ cathode shows an excellent electrochemical performance with a peak power density of 1.4 W cm−2 and polarization resistance of 0.06 Ω cm2 at 700 °C, which is significantly higher than that of the cell using the pristine PBFZ cathode. This study provides a new and rational strategy to design a high-performance cathode for proton-conducting SOFCs. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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