Effect of Cathode Contacting on Anode Supported Cell Performances

Kurzfassung

The contact geometry effect on anode-supported cells (ASCs) performances has been evaluated by means of current-voltage curves (I-V curves) and electrochemical impedance spectroscopy (EIS). The use of platinum meshes and Crofer 22 APU interconnects as current collectors has been compared. Additionally, the application of La0.6Sr0.4Co0.2Fe0.8O3 (LSCF) as contacting paste between the electrode and the metallic current collector allowed to estimate its beneficial effect by enhancing the current distribution at the cathode side. An inverse proportionality between the ohmic contributions and the extension of the contacting area has been observed. The usage of a contacting layer positively affected the polarization contribution as well. Both effects influenced positively the cell performances. The reduction of the ohmic losses resulted in a higher impact on the power density.