Oxide-ceramic high-temperature fuel cell

摘要

The present invention relates to high-temperature solid oxide fuel cells, in particular to rotationally symmetrical high-temperature solid oxide fuel cells. The inventive oxide-ceramic high-temperature fuel cell having one or more gas channel(s) open at at least one end. The fuel cell has a substrate surrounding the gas channel(s) at least sectionally, preferably completely. The gas channel(s) and/or the substrate surrounding the gas channel(s) has/have (a) changing cross-sections(s), preferably (a) conically tapering cross-section(s), seen in the direction of the longitudinal axis/axes of the gas channel(s).

主权项

1. An oxide-ceramic high-temperature tubular fuel cell having a rotationally symmetrical gas channel (2) open at least at one end, characterized in that the fuel cell has a substrate (1) surrounding the gas channel rotationally symmetrical at least sectionally along its periphery,
wherein the substrate forms an electrical discharge structure which is not part of the anode and is not part of the cathode of the fuel cell, or forms a bearing structure of the fuel cell which is not part of the anode and is not part of the cathode of the fuel cell and which is not part of an electrolyte of the fuel cell, wherein said substrate has rotationally symmetrical conically tapering cross-sections that change continuously along the longitudinal axis of the gas channel and wherein the substrate (1) forms the anode of the fuel cell or the substrate (1) forms the cathode of the fuel cell; and wherein the substrate (1) serves as an inner electrode, and said fuel cell further having an outer electrode, said outer electrode having an internal cone adapted to the inner electrode and the electrolyte, so the outer periphery of the fuel cell corresponds to a cylinder; and wherein said fuel cell includes a connecting structure located at an end of said fuel cell for connecting said fuel cell with a fuel cell stack, said connecting structure comprising one or more internal or external threads, recesses, or prolongations integrated into or formed from said substrate and having a shape matched to provide an exact fit with a counter-shape within a fuel cell stack to which the fuel cell is connectable, said threads, recesses, or prolongations connected to a fuel cell stack by clamping, plug-in, inserting, adhering, soldering, or welding, said threads, recesses, or prolongations made as part of said anode, cathode, electrical discharge structure, or bearing structure section of the fuel cell, and wherein said threads, recesses, or prolongations are electrically conductive to enlarge the electrical contact surface between the fuel cell and a current-discharge unit of the fuel cell stack.