SOFCs with an LSM Cathode

The first FZJ measurements at relatively high temperatures, that is, 950 °C, involved ESCs. During this period, optimization of the cathode material was started. However, the use of relatively thick electrolytes required a minimum realistic operating temperature of 900 °C as the electrolyte resistance to ion 

Cathode material Current density (A cm ) Activation energy, Ea(k) mor ) 

2 Advances in Research, Development, and Testing of Single Cells 253 

By this time, it had been discovered that the chosen reduction temperature of the NiO in the cermet also influenced the cell performance [9]. It was found that the heating and reduction processes have to be defined well, since wrongly chosen conditions resulted in lower and significant scatter of performance results, because the process of electrode activation is not yet fuUy completed. This electrode activation of SOFCs refers to one or more processes that generally occur during the first period of performance measurements see also Section 9.2.3. 

Functionality Production technlque(s) Type Sintering temperature (°C) Thickness 

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