The present invention provides a solid electrolyte type of fuel cell of a planar type structure comprising a plurality of solid electrolyte plates, each being in the form of a flat plate and having a porous cathodic layer on one side and a porous anodic layer on the other side, which are laminated together through an interconnector plate provided in both its sides with grooves defining gas passages, wherein oxidizing agent and fuel gases are fed through said passages to the cathodic and anodic sides, thereby reducing the length of a current path running through regions of high resistance, increasing the degree of integration and improving reliability. By using heat-resistant parts for the interconnectors, cathodes and anodes, it is also possible to improve the resistance to oxidation and reduction as well as durability and obtain low resistance. it is further possible to obtain a fuel cell having satisfactory properties and capable of standing up to use over an extended period of time by using solid electrolyte for fuel cells which is obtained by sintering Y2 O3 -containing partially stabilized zirconia added with 5 to 20 % of alumina, has low resistance and high mechanical strength and is stable.

Solid electrolyte type fuel cells

The invention relates to a fuel cell assembly (1) having a porous, ceramic carrier (2) which has internal gas channels (3) and has rows (5) of fuel cells (4) with solid electrolytes (7), which rows (5) are arranged at right angles to the gas channels (3) on the external main surfaces of the carrier (2). The fuel cells (4) in one row (5) are electrically connected in series or in parallel, and the fuel cell rows (5) are connected in series. The fuel cell assembly (1) can be used in fuel cell batteries.

Fuel cell assembly

A solid electrolyte, high-temperature fuel cell module (1) having a plurality of solid electrolyte, high-temperature fuel cells which are connected in series, are flat, and rest firmly one on top of the other, there being installed between cells which are directly adjacent and are connected in series in each case one bipolar plate (12), which electrically conductively connects the cathode of the one cell to the anode of the cell adjacent to this, ensures the gas distribution by means of channels (14, 15, 16, 17) that are incorporated on both sides, represents a supporting structural element and contains in the edge region perforations (18, 19, 20, 21) which are linked either to the channels of the one side or to the channels of the other side of the bipolar cathode, and in each case one solid electrolyte element being introduced between the mutually adjacent bipolar plates, which element is coated with cathode material on the one side and with anode material on the other side, rests at the edges, by means of separate sealing surfaces, in a gas-tight manner on the bipolar plates and, in the edge region, has a number of perforations which are superimposed on the perforations in the bipolar plate.

Solid electrolyte high-temperature fuelcell module

An arrangement of high-temperature fuel cells, which are assembled to form a stack and consist of a ceramic solid electrolyte (1), a porous oxygen electrode (2) and a porous fuel electrode (3), with gas-proof separating plates (4) connected between said fuel cells, which have knobs (5) in their plane on both sides for electrical contact and sealing edges (6; 7) on their edge on the oxygen side and on the fuel side, the planes of which sealing edges are at right angles to the plane of the plate. Unambiguous static characteristics for the pressure forces on the contacts and excellent centring of the components are also provided.

Arrangement of a plurality of flat, even, high-temperature fuel cells, assembled in a stack

Perfectionnements aux piles à combustibles

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Perfectionnements aux piles à combustibles