WO1996007212B1 - Solid electrolyte high-temperature fuel cell and fuel cell arrangement - Google Patents

Abstract

The invention relates to a solid electrolyte high-temperature fuel cell. Gas is taken past the anode from a gas supply via a gas channel. A corresponding airsupply takes air over the cathode. There is also a discharge pipe for the exhaust gas. According to the invention, the solid electrolyte element consists of a vertical open-topped, closed-bottomed hollow body (2) of ceramic electrolyte material. The anode (3) is fitted on the inner surface of the hollow body and the cathode (8) on its outer surface. Through the hollow body passes the gas channel which is also the anode chamber (4). It is supplied from a gas inlet (1a) opening in or on the bottom of the hollow body. On the cathode side the hollow body is surrounded by and spaced from a further closed element (5) of highly heat-resistant material from beneath as far as the air inlet aperture. The space thus created forms the air channel (7) and the cathode chamber at the same time. The gas-air mixture leaving the gas and air channel is taken upwards from the component to the exhaust gas line in this arrangement.

Claims

AMENDED CLAIMS [received at the International Bureau on 12 March 1996 (12.03.96); original claims 1-12 replaced by amended claims 1-11 (4 pages)] 1. solid electrolyte high-temperature fuel cell with anode and cathode having Festelektrolyt- element in which a gas supply with over the anode leading gas channel and an air supply with over the cathode leading air duct and a discharge for the exhaust gas are provided, characterized in that the solid electrolyte element a hollow body (2) made of ceramic electrolyte material which is open at the top and is closed at the bottom, on the inner surface of which the anode (3) and on the outer surface of which the cathode (8) is applied and in which the gas channel, the anode space (4 ), which is fed by the gas inlet (1a, 1b) opening in or at the bottom of the hollow body, and in that the hollow body (2) forming the solid electrolyte element is at the cathode side at a distance from another, down to the mouth the air supply (11) closed element (5) made of heat-resistant Mate In this case, the space located between the hollow body (2) and the element (5) enclosing it forms the cathode space and at the same time the air channel (7) and the gas leaving the gas and air duct (7). Air mixture at the top of the element to the exhaust pipe (13) is guided and that in the hollow body (2) projecting, downwardly open dip tube (12) is provided, which is connected to the top of the gas line (16). 2. A solid electrolyte high-temperature fuel cell according to claim 1, characterized in that the two opposing anode surfaces within the hollow body (2) are connected to one another in an electrically conductive manner. 3. A solid electrolyte high-temperature fuel cell according to claim 2, wherein a wire mesh is provided for the electrical connection of the two anode surfaces. 4. High-temperature solid electrolyte fuel cell according to claim 2, characterized in that there are provided webs of anode material for the electrical connection of the two anode surfaces. 5. Solid electrolyte high-temperature fuel cell ge according to one of claims 1 to 4, d a d u r c h e c e n e c e s in that the hollow body (2) enveloping element (5) projects beyond the hollow body and above the Hollow body space in the element forms a Nachbrennkammer (9) for the gas and the air duct (7) leaving the gas-air mixture. 6. solid electrolyte high-temperature fuel cell arrangement, consisting of several, in series ge switched, immediately adjacent Brennstoff¬ cells according to one of claims 1 to 5. 7. solid electrolyte high-temperature fuel cell assembly, consisting of several, in series ge switched, immediately adjacent Brennstoff¬ cells according to claim 6, characterized in that between two adjacent fuel cells depending on a common air supply channel (10) is vorgese¬ hen, the bottom in the air channel (7) opens and is connected to the top of the air supply line. 8. A high-temperature solid electrolyte fuel cell according to claim 7, wherein: the air supply ducts extend over the outer surface of the element surrounding the hollow body. 9. solid electrolyte high-temperature fuel cell assembly according to one of claims 7 or 8, characterized in that the end face of the fuel cell Luftvorwärmkammer (14) is provided, which is fed from below through the air supply line and the top of the air supply channels (10) is connected , ₁₀ . Solid electrolyte high-temperature fuel cell arrangement according to one of Claims 6 to 9, characterized in that the elements enclosing the hollow bodies are closed off at the top by a common head plate (17) and the bottom of the fuel cell oven, on which the elements (15) have no firm connection, forms the lower end of the elements. 11. Solid electrolyte high-temperature fuel cell arrangement according to one of claims 6 to 9, characterized in that the hollow body (2) enveloping elements (15) are supported by a common head plate (17) and are closed at the bottom by a common bottom plate ,