An electrochemical cell stack having a plurality of electrochemical cells stacked along a longitudinal axis. The electrochemical cells include a membrane electrode assembly comprising a cathode catalyst layer, an anode catalyst layer, and a polymer membrane interposed between the cathode catalyst layer and the anode catalyst layer. The electrochemical cells also include an anode plate and a cathode plate with the membrane electrode assembly interposed therebetween, and the anode plate defines a plurality of channels that form an anode flow field facing the anode catalyst layer. The electrochemical cells further include a cathode flow field positioned between the cathode plate and the cathode catalyst layer, wherein the cathode flow field comprises a porous structure.

A fuel cell includes: an electrolyte membrane; first and second catalyst layers respectively formed on first and second surfaces of the electrolyte membrane; and a separator, the first catalyst layer being arranged between the separator and the electrolyte membrane, wherein the separator includes first and second grooves through which reactant gas flows between the first catalyst layer and the separator.

A fuel cell includes: an electrolyte membrane; first and second catalyst layers respectively formed on first and second surfaces of the electrolyte membrane; and a separator, the first catalyst layer being arranged between the separator and the electrolyte membrane, wherein the separator includes first and second grooves through which reactant gas flows between the first catalyst layer and the separator.

An assembly for an electrochemical system, comprising a separator plate with at least one layer and a membrane electrode assembly, MEA, the MEA having: an electrochemically active region, a frame-like reinforcing layer surrounding the electrochemically active region, and at least one tab for positioning the MEA relative to the separator plate and/or for fastening the MEA to the separator plate, wherein the layer has a first flat side and a second flat side opposite the first flat side, wherein the tab is connected at one side to the frame-like reinforcing layer and its free end is arranged on the side of the second flat side of the layer, wherein the frame-like reinforcing layer is arranged on the first flat side of the layer.

A plate assembly for an electrochemical system, comprising an end plate, a first separator plate which adjoins the end plate and which has a plate plane, a second separator plate which adjoins the first separator plate, the second separator plate having at least one media-guiding second through-opening, wherein an orthogonal projection of the second through-opening onto the first separator plate perpendicular to the plate plane defines a projection area, wherein the first separator plate has in the region of the projection area no through-opening or a first through-opening, the area of which is less than 20% of the area of the second through-opening.

A fuel cell has an active area and a distribution area. The distribution area can be in communication with and disposed substantially adjacent to the active area. The active area can include a non-channeled material exhibiting anisotropic flow. In certain circumstances, the non-channeled material exhibiting anisotropic flow can include expanded metal sheet. The expanded metal sheet can achieve even distribution to throughout the active area without the use of conventional channels.

This fuel cell is provided with a first electrolyte membrane electrode structure and a second electrolyte membrane electrode structure, respective cathode electrodes of which face each other with an oxidant gas supply layer being interposed therebetween. The oxidant gas supply layer has: a first projection part which presses an interconnect part of an electrolyte membrane that constitutes the first electrolyte membrane electrode structure; and a second projection part which presses an interconnect part of an electrolyte membrane that constitutes the second electrolyte membrane electrode structure.

A bipolar plate assembly includes a first frame member, a second frame member, and a membrane electrode assembly. The first frame member has a first side and a second side. The first side has a first side protuberance. The second frame member includes a first side and a second side. The second side has a second side recess. The membrane electrode assembly has an anode plate and a cathode plate. A portion of the membrane electrode assembly is disposed between the first frame member and the second frame member. The portion of the membrane electrode assembly has a juxtaposition of the anode plate and the cathode plate. The first side protuberance of the first frame member deforms the portion of the membrane electrode assembly into the second side recess of the second frame member.

A bipolar plate assembly includes a first frame member, a second frame member, and a membrane electrode assembly. The first frame member has a first side and a second side. The first side has a first side protuberance. The second frame member includes a first side and a second side. The second side has a second side recess. The membrane electrode assembly has an anode plate and a cathode plate. A portion of the membrane electrode assembly is disposed between the first frame member and the second frame member. The portion of the membrane electrode assembly has a juxtaposition of the anode plate and the cathode plate. The first side protuberance of the first frame member deforms the portion of the membrane electrode assembly into the second side recess of the second frame member.

The present disclosure relates to a separator for a fuel cell and a manufacturing method of the same. The manufacturing method of the separator for a fuel cell includes: an unevenness forming step of forming a fine-sized unevenness on a surface of a metal base material; and a coating layer forming step of forming a coating layer by coating carbon on the surface of the metal base material on which the unevenness is formed. Through the manufacturing method, it is possible to obtain an effect of improving water discharge performance and adhesion between the metal base material and the coating layer by forming unevenness on a surface of a metal base material, and then forming a coating layer.