Determination of Transport Parameters on Thin Cathodes of Planar Anode Substrate-Type Solid Oxide Fuel Cells

摘要

Products of the transport parameters of the mean transport pore model were determined at cathode layers (and anode substrates) of ready-made planar anode substrate type solid oxide fuel cells (SOFC) by means of permeation experiments. For this purpose the experimental set-up and the description of the fluxes of the permeation experiment, originally developed by Fott and Petrini (1), were modified. In order to realize a flow entering and leaving the cathode layer through the same surface a sample holder was developed which extends the area of the lower compartment to the surface of the cathode. Due to the new direction of the flow the latter has to be described in a 3-dimensional manner. In order to be able to analyse the experiment according to the standard procedure the description of the fluxes had to be simplified. These simplifications and first results of the permeation experiments are presented.