Interaction of Cathode and Electrolytes

36 LSM/3YSZ interface in the composite cathode (Backhaus-Ricoult 2006) 

The continuum interfacial defect modeling approach is used to evaluate the interfacial defect concentrations with oxygen chemical potential. It is obtained that with decreasing oxygen aclivily and negative polarisation, the Mn interfacial cluster increases. 

37 SEM micrograph of a cross-section of the symmetrical cell (Hildenbrand and coworkers 2011) 

The YDC interlayer is 3 im thick and the porous LSCF electrode has mean grain size of 0.50 pm. A dense LSCF layer decreases the polarisation resistance of cathode by a factor of THREE. Lao,6Sro.4Co03-5 (LSC) and Lao,8Sro.2Fe03-5 (LSF) are used as alternatives to the LSM cathode along with a doped ceria interlayer to avoid detrimental reactions. 

Anderson and co-workers worked on the possibility of reducing lanthanide ferrite cathodes—YSZ interaction with A-site dopant concentration (La with Nd, Sm, Pr, and Sr with Ba, Ca). Table 8.5 yields the reaction products formed when the cathode interacted with YSZ. 

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