Electrochemical performance and stability of nano-particulate and bi-continuous La1-XSrXCoO3 and Ce0.9Gd0.1O1.95 composite electrodes
Publication: Research - peer-review › Journal article – Annual report year: 2012
A bi-continuous porous cathode consisting of nano-particles of strontium substituted lanthanum cobaltite (LSC) covering the surface of a Ce0.9Gd0.1O1.95 (CGO10) backbone has been produced. The polarization resistance (R (P)) of this cathode was measured to similar to 35 m Omega cm(2) at 650 A degrees C. The area-specific resistance at 650 A degrees C (ASR) when applied onto an anode supported cell (ASC) was found to increase from 540 to 730 m Omega cm(2) when subjected to a thermal cycle to 850 A degrees C. This effect was attributed to particles coarsening but also to a reaction with the electrolyte. The results imply that a CGO10 barrier is required for this type of nano-structured cathode.
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- ELECTROCHEMISTRY, OXIDE FUEL-CELLS, GD-DOPED CERIA, IMPEDANCE SPECTROSCOPY, OXYGEN REDUCTION, LA1-XSRXMN1-YCOYO3+/-DELTA PEROVSKITES, SURFACE EXCHANGE, THIN-FILM, CATHODES, INFILTRATION, DIFFUSION