SOFC STACK CONCEPT

摘要

Fuel cell consisting of simple components. This fuel cell is preferably constructed as anode-supported solid oxide fuel cell, but can also be used with electrolyte- and metal- supported solid oxide fuel cells. The anode and electrolyte are larger than the cathode and the portion of the anode/electrolyte protruding beyond the cathode is provided with a peripheral seal. The anode/electrolyte/cathode combination is provided with a flow/gas distribution grid on both the anode and the cathode side. The anode/cathode combination including the flow/gas distribution grids is enclosed between two separator plates, an auxiliary plate and a spacer. There is a peripheral seal. The auxiliary plate is designed for external feeding and discharge of a cathode gas, whilst the separator plate and the auxiliary plate are prodded with openings for internal feeding/discharge of anode gas. The join of the auxiliary plate and spacer to the separator plate is effected by means of a solder join. The other two seals are effected with a metallic seal, such as a silver wire. In this way a cell stack consisting of at least twenty-five fuel cells produced in this way can be built up using simple components obtained, for example, from sheet by punching. The invention is preferably carried out with the use of internal distribution of the anode gas and external distribution of the cathode gas, as a result of which a compact, safe cell stack is obtained.