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 invention relates to a distributor plate (7) for an electrochemical cell (1), wherein the distributor plate (7) has a structure comprising webs (12) with surfaces (13) and main channels (11) with base surfaces (33), and the surfaces (13) of the webs (12) have distributor channels (60), wherein at least one distributor channel (60) has an auxiliary channel (15) which connects the at least one distributor channel (60) to a base surface (33) of a main channel (11) and/or a lateral surface (31) of a web (12), and wherein the auxiliary channel (15) has a smaller diameter than the at least one distributor channel (60). The invention additionally relates to an electrochemical cell (1).

Abstract: The invention relates to a bipolar plate (100) for a fuel cell system (1), having: a cathode-side plate (10), which on a first side (11) has a first channel structure (K1) for an oxygen-containing reactant (O2) and on a second side (12) has a second channel structure (K2) for a coolant (KM), and an anode-side plate (20), which on a first side (21) has a first channel structure (A1) for a fuel-containing reactant (H2) and on a second side (22) has a second channel structure (A2) for a coolant (KM), the cathode-side plate (10) and the anode-side plate (20) bearing against one another by means of the second sides (12, 22) for the coolant (KM). To this end, in accordance with the invention, the first channel structure (K1) of the cathode-side plate (10) differs geometrically from the second channel structure (K2) of the cathode-side plate (10).

Abstract: The invention relates to a method for producing membrane electrode assemblies (MEA) for fuel cells (101), in particular in a continuous flow path process, comprising the following steps: 1) providing a band-shaped membrane material (M) in a flow path direction (D), e.g. on a roller, such that in particular the membrane material (M) can be unwound from the roller in the flow path process, 2) coating the band-shaped membrane material (M) with an active material (E), 3) cutting the coated membrane material (M) into individual membrane electrode assemblies (MEA), such that the individual membrane electrode assemblies (MEA) are formed with at least one edge region (TR), which is formed so as to be curved and/or angled when viewed in the flow path direction (D).

Abstract: A solid polymer electrolyte fuel cell comprises a membrane electrode assembly comprising a polymer electrolyte disposed between an anode electrode and a cathode electrode, the anode and cathode electrodes each comprising a catalyst, a central region and a peripheral region, wherein the peripheral region of the cathode electrode comprises a cathode edge barrier layer; a fluid impermeable seal in contact with at least a portion of the anode and cathode peripheral regions and the cathode edge barrier layer; an anode flow field plate adjacent the anode electrode; and a cathode flow field plate adjacent the cathode electrode, wherein the cathode flow field separator plate comprises a cathode peripheral flow channel and at least one cathode central flow channel; wherein at least a portion of the cathode edge barrier layer traverses at least a portion of the cathode peripheral flow channel.

Abstract: A solid polymer electrolyte fuel cell comprises a membrane electrode assembly comprising a polymer electrolyte disposed between an anode electrode and a cathode electrode, the anode and cathode electrodes each comprising a catalyst, a central region and a peripheral region, wherein the peripheral region of the cathode electrode comprises a cathode edge barrier layer; a fluid impermeable seal in contact with at least a portion of the anode and cathode peripheral regions and the cathode edge barrier layer; an anode flow field plate adjacent the anode electrode; and a cathode flow field plate adjacent the cathode electrode, wherein the cathode flow field separator plate comprises a cathode peripheral flow channel and at least one cathode central flow channel; wherein at least a portion of the cathode edge barrier layer traverses at least a portion of the cathode peripheral flow channel.