Impedance spectroscopy study of Au electrodes on Gd-doped CeO2 (GDC) – Molten Li2CO3+Na2CO3 (LNC) composite electrolytes
نویسندگان
چکیده
We herein report an impedance spectroscopy study of Au electrodes on Gd-doped CeO2 (GDC) – molten Li2CO3+Na2CO3 (LNC) composite electrolytes in O2 and O2+CO2 atmospheres. Complementary measurements GDC alone are provided for supporting insight. find that the adsorption CO2 atmospheres effectively blocks oxygen severely slows reduction kinetics. The conductivity is dominated by phase solid-solid temperature region, while LNC dominates above its melting point, no further enhancement e.g. interfacial effects found. incorporation melt into results a significant polarisation resistance atmospheres, as mediates reaction peroxide mechanism. In however, GDC-LNC membranes significantly higher, higher even than GDC. This we assign again to blocking (or carbonate) surfaces ceria sluggish transport reactions now mediated carbonate-carried oxide species (CO42−) instead species.
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ژورنال
عنوان ژورنال: Journal of Power Sources
سال: 2022
ISSN: ['1873-2755', '0378-7753']
DOI: https://doi.org/10.1016/j.jpowsour.2022.230986