Elektrochemical active element for a planar high-temperature fuel cell

摘要

The planar electrodes (1, 3) are separated and joined by a solid electrolyte (2). The cathode (1) reacts with oxygen in oxygen-bearing gas in operation. The cellular, porous film (10), attached to the cathode on the opposite side to the electrolyte film (2), has a cellular structure allowing isotropic flow of oxygen-bearing gas parallel to electrolyte layer (2). The film (10) is formed by creating a skeleton from open-pore plastic foam containing cathode material paste (Fig. 9). During drying and sintering the plastic material of the foam evaporates leaving the cellular porous structure attached to the cathode. The thickness of this film must be at least twice the diameter of a cell (11).