Abstract: The invention relates to a distributor plate (7) for an electrochemical cell (1), the distributor plate (7) having a structure comprising connecting portions (12) with surfaces (13), and main ducts (11) having floor surfaces (33). The surfaces (13) and optionally on the floor surfaces (33) of the secondary ducts (15) are provided with a pattern (92) and the distributor plate (7) has at least two regions (94) in which the patterns (92) on the surfaces (13) differ from one another. The invention further relates to a method for producing the distributor plate (7), an electrochemical cell (1), and a method for operating an electrochemical cell (1).

Abstract: The present invention relates to a fuel cell stack (10) for an electrochemical reactor (11), comprising: —a first membrane-electrode assembly (12), a first anode plate (21) having ridges (30), between which ridges channels (31) for conducting fuel (32) and coolant (33) are formed, and—a second anode plate (22) having ridges (30), between which ridges channels (31) for conducting fuel (32) and coolant (33) are formed; wherein the first membrane-electrode assembly (12) is disposed between the first anode plate (21) and the second anode plate (22) in a stacking direction (36) of the fuel cell stack (10) and wherein the ridges (30) each have a ridge outer face (35) spaced apart from the channels (31), and wherein ridge outer faces (35) of the first anode plate (21) and of the second anode plate (22) which face each other are disposed one over the other in the stacking direction (36) in pairs, and ridge outer faces (35) of the first anode plate (21) and the second anode plate (22) which face away from each other a

Abstract: The invention relates to a fuel cell (110) comprising two gas diffusion layers (70), two electrode elements (10, 10?) and a membrane element (30). The membrane element (30) is arranged between the two gas diffusion layers (70), each electrode element (10, 10?) being embedded between a gas diffusion layer (70) and the membrane element (30). The membrane element (30) is in the form of an amorphous carbon layer.

Abstract: A fuel cell system (200), wherein the fuel cell system (200) has: a) a fuel cell stack (10), b) an anode gas path (20) which fluidically communicates with the fuel cell stack (10) and which serves for supplying anode gas from an anode gas store (22) to the fuel cell stack (10), c) a cathode gas path (30) which fluidically communicates with the fuel cell stack (10) and which serves for supplying cathode gas from a cathode gas store (32) to the fuel cell stack (10), d) a cooling fluid path (40) which fluidically communicates with the fuel cell stack (10) and which serves for supplying cooling fluid from a cooling fluid store (42) to the fuel cell stack (10), e) a vibration generator (60) which is in data-transmitting communication with a control unit (50) and which serves for setting the fuel cell stack (10) into a vibrating state, and f) the control unit (50) for actuating the vibration generator (60) in order to set the fuel cell stack (10) into the vibrating state by means of the vibration generator (60).

Abstract: The invention relates to a bipolar plate (30) for a fuel cell (10). The bipolar plate (30) has a first bipolar plate half (32) and a second bipolar plate half (34), and the bipolar plate (30) has at least one fluid channel (36) for carrying at least one fluid (F). The first bipolar plate half (32) has at least one bonded connection (40) to the second bipolar plate half (34), and the bipolar plate (30) comprises at least one sealing arrangement (50) which sealingly covers the at least one bonded connection (40). The invention also relates to a fuel cell and a method for sealingly covering a bonded connection of the first bipolar plate half (32) to the second bipolar plate half (34) of the bipolar plate (30).

Abstract: A fuel cell system (200), wherein the fuel cell system (200) has: a) a fuel cell stack (10), b) an anode gas path (20) which fluidically communicates with the fuel cell stack (10) and which serves for supplying anode gas from an anode gas store (22) to the fuel cell stack (10), c) a cathode gas path (30) which fluidically communicates with the fuel cell stack (10) and which serves for supplying cathode gas from a cathode gas store (32) to the fuel cell stack (10), d) a cooling fluid path (40) which fluidically communicates with the fuel cell stack (10) and which serves for supplying cooling fluid from a cooling fluid store (42) to the fuel cell stack (10), e) a vibration generator (60) which is in data-transmitting communication with a control unit (50) and which serves for setting the fuel cell stack (10) into a vibrating state, and f) the control unit (50) for actuating the vibration generator (60) in order to set the fuel cell stack (10) into the vibrating state by means of the vibration generator (60).

Abstract: The invention relates to a fuel cell (2) comprising at least one membrane/electrode unit (10) comprising a first electrode (21) and a second electrode (22), which electrodes are separated from one another by a membrane (18), and comprising at least one bipolar plate (40) which comprises a first distribution region (50) for distributing a fuel to the first electrode (21) and a second distribution region (60) for distributing an oxidation agent to the second electrode (22). A distribution unit (30) is provided in at least one of the distribution regions (50, 60) and has at least one flat woven fabric (80), wherein the flat woven fabric (80) is deformed in such a way that raised portions (32) of the woven fabric (80) touch one of the electrodes (21, 22).

Abstract: The invention relates to a bipolar plate (40) for a fuel cell, comprising a first distributing region (50) for distributing a fuel to a first electrode (21) and a second distributing region (60) for distributing an oxidant to a second electrode (22). At least one woven fabric (80) is provided in at least one of the distributing regions (50, 60). The invention further relates to a fuel cell, comprising at least one membrane electrode assembly (10) having a first electrode (21) and a second electrode (22), which are separated from each other by a membrane (18), and comprising at least one bipolar plate (40) according to the invention.

Abstract: The invention relates to a distributor structure (12, 20), particularly a bipolar plate for a stack structure (10) of a fuel cell or of an electrolyser. The distributor structure (12, 20) comprises a channel structure (48) that interacts with at least one polymer membrane (16). The distributor structure (12, 20) is designed as a plastic part (40) that has electrically conductive properties.

Abstract: The invention relates to a distribution structure (10) for providing at least one reaction gas, in particular a gas mixture containing oxygen (O2), for a fuel cell (100) or an electrolyser, having a first structure element (11) and a second structure element (12), wherein the first structure element (11) and the second structure element (12) are designed and arranged with respect to one another such that: a distribution area (15) for the reaction gas is formed between the first structure element (11) and the second structure element (12); a plurality of feed channels (16) branch off from the distribution area (15) and are orientated substantially perpendicular to the distribution area (15); and a plurality of discharge channels (17) are formed below the second structure element (12) and are orientated parallel to the distribution area (15).

Abstract: The invention relates to a fuel cell (110) comprising two gas diffusion layers (70), two electrode elements (10, 10?) and a membrane element (30). The membrane element (30) is arranged between the two gas diffusion layers (70), each electrode element (10, 10?) being embedded between a gas diffusion layer (70) and the membrane element (30). The membrane element (30) is in the form of an amorphous carbon layer.

Abstract: The invention relates to a method for producing a flow plate (10a; 10b) for a fuel cell, in particular a PEM fuel cell, and/or an electrolyzer, wherein the flow plate (10a; 10b) is provided with at least one flow element (12a; 12b), which is at least partially made of metal fibers (14a; 14b). According to the invention, in at least one method step, the metal fibers (14a; 14b) are aligned by means of at least one alignment unit (30a; 30b).

Abstract: The invention relates to a fuel cell (2) comprising at least one membrane/electrode unit (10) comprising a first electrode (21) and a second electrode (22), which electrodes are separated from one another by a membrane (18), and comprising at least one bipolar plate (40) which comprises a first distribution region (50) for distributing a fuel to the first electrode (21) and a second distribution region (60) for distributing an oxidation agent to the second electrode (22). A distribution unit (30) is provided in at least one of the distribution regions (50, 60) and has at least one flat woven fabric (80), wherein the flat woven fabric (80) is deformed in such a way that raised portions (32) of the woven fabric (80) touch one of the electrodes (21, 22).

Abstract: The invention relates to a distribution structure (10) for providing at least one reaction gas, in particular a gas mixture containing oxygen (O2), for a fuel cell (100) or an electrolyser, having a first structure element (11) and a second structure element (12), wherein the first structure element (11) and the second structure element (12) are designed and arranged with respect to one another such that: a distribution area (15) for the reaction gas is formed between the first structure element (11) and the second structure element (12); a plurality of feed channels (16) branch off from the distribution area (15) and are orientated substantially perpendicular to the distribution area (15); and a plurality of discharge channels (17) are formed below the second structure element (12) and are orientated parallel to the distribution area (15).

Abstract: The invention relates to a method for producing a flow plate (10a; 10b) for a fuel cell, in particular a PEM fuel cell, and/or an electrolyzer, wherein the flow plate (10a; 10b) is provided with at least one flow element (12a; 12b), which is at least partially made of metal fibers (14a; 14b). According to the invention, in at least one method step, the metal fibers (14a; 14b) are aligned by means of at least one alignment unit (30a; 30b).

Abstract: The invention relates to a bipolar plate (40) for a fuel cell, comprising a first distributing region (50) for distributing a fuel to a first electrode (21) and a second distributing region (60) for distributing an oxidant to a second electrode (22). At least one woven fabric (80) is provided in at least one of the distributing regions (50,60). The invention further relates to a fuel cell, comprising at least one membrane electrode assembly (10) having a first electrode (21) and a second electrode (22), which are separated from each other by a membrane (18), and comprising at least one bipolar plate (40) according to the invention.

Abstract: The invention relates to a method (40) for starting up a fuel cell (11), wherein hydrogen is introduced into an anode chamber (15) of the fuel cell (11), and at the beginning of the start-up process oxygen is present in the anode chamber (15) of the fuel cell (11). According to the invention, at the beginning of the hydrogen introduction stage enough hydrogen is introduced to ensure that upon entry into the anode chamber (15) hydrogen and oxygen are present in no more than a stoichiometric ratio.

Abstract: The invention relates to a method (40) for starting up a fuel cell (11), wherein hydrogen is introduced into an anode chamber (15) of the fuel cell (11), and at the beginning of the start-up process oxygen is present in the anode chamber (15) of the fuel cell (11). According to the invention, at the beginning of the hydrogen introduction stage enough hydrogen is introduced to ensure that upon entry into the anode chamber (15) hydrogen and oxygen are present in no more than a stoichiometric ratio.