The invention relates to a separator plate, a membrane electrode assembly and a fuel cell stack, which are designed for higher voltages. It is provided that in the active region at least one of the cell components contains at least one insulating element which permanently enables different electrical potentials in a cell plane (orthogonal to the stacking direction).

The invention relates to a separator plate, a membrane electrode assembly and a fuel cell stack, which are designed for higher voltages. It is provided that in the active region at least one of the cell components contains at least one insulating element which permanently enables different electrical potentials in a cell plane (orthogonal to the stacking direction).

A fuel cell plate comprising a face intended to route a fuel gas or an oxidizing gas to the active surface of a Membrane Electrode Assembly, said face of the plate comprising projecting ribs delimiting a determined number of channels provided for the circulation of gas, the channels having a determined length (LCA) and a determined width (E), the ribs having a determined width (LA), the plate being characterized in that the product P of the total length (LN) of the ribs on the plate per unit of active surface (in cm.sup.2) multiplied by the rate of opening (TO) of the plate is between 4.7 and 10, i.e. that 4.7<P (cm.sup.1)=LNTO)/S<10, the rate of opening TO being defined by TO=100.Math.(E/E+LA), the active surface of the plate being the surface of the plate intended to be facing the active surface of the Membrane Electrode Assembly.

The present disclosure provides methods for forming flow plate and frame assemblies that comprise an anode frame member, a flow plate, and a cathode frame member with the flow plate retained between the anode and cathode frame members. The present disclosure also provides for flow plate and frame assemblies, fuel cell stacks containing a plurality of the flow plate and frame assemblies, and fuel cell systems containing the fuel cell stacks. A fluidly connected anode fluid pathway can be provided from an anode fluid inlet, through conduits in the anode frame member, onto an anode surface of the flow plate, and into anode flow channels.

A separator for a fuel cell and a unit cell of a fuel cell are disclosed. The separator for the fuel cell includes a separation plate having a coupling protrusion that protrudes from an edge thereof, and a porous body having a coupling hole into which the coupling protrusion is fixedly inserted, so that the porous body is coupled to a plane of the separation plate. The porous body defining a path in which reactive gases flow.

A separator for a fuel cell and a unit cell of a fuel cell are disclosed. The separator for the fuel cell includes a separation plate having a coupling protrusion that protrudes from an edge thereof, and a porous body having a coupling hole into which the coupling protrusion is fixedly inserted, so that the porous body is coupled to a plane of the separation plate. The porous body defining a path in which reactive gases flow.

The present disclosure provides a method for manufacturing a fuel cell separator that ensures easy manufacture of the fuel cell separator having sufficiently excellent conductive property. The method for manufacturing the fuel cell separator according to the present disclosure is a method for manufacturing a fuel cell separator where a conductive oxide film is formed on a surface of a metal substrate using a mist CVD method, and the method includes: preparing a raw material solution containing a precursor of the conductive oxide film and hydrochloric acid; atomizing the raw material solution to generate a mist; and supplying the mist to the surface of the metal substrate to form the conductive oxide film on the surface of the metal substrate through a reaction by heat.

The present disclosure provides a method for manufacturing a fuel cell separator that ensures easy manufacture of the fuel cell separator having sufficiently excellent conductive property. The method for manufacturing the fuel cell separator according to the present disclosure is a method for manufacturing a fuel cell separator where a conductive oxide film is formed on a surface of a metal substrate using a mist CVD method, and the method includes: preparing a raw material solution containing a precursor of the conductive oxide film and hydrochloric acid; atomizing the raw material solution to generate a mist; and supplying the mist to the surface of the metal substrate to form the conductive oxide film on the surface of the metal substrate through a reaction by heat.

A cell stack device (1) according to the present invention includes a plurality of cells (3) having a columnar shape; and electrically conductive members (4) interposed between adjacent cells (3) of the plurality of cells (3), and connected to the each adjacent cell (3) with a bonding material (15) having electrically conductive property. The bonding material (15) contains electrically conductive particles and fibrous bodies (16) having electrically insulating properties, and a major axis direction of the fibrous bodies (16) is oriented in a predetermined direction in regions where the electrically conductive members (4) face to the each adjacent cell (3).

A cell stack device (1) according to the present invention includes a plurality of cells (3) having a columnar shape; and electrically conductive members (4) interposed between adjacent cells (3) of the plurality of cells (3), and connected to the each adjacent cell (3) with a bonding material (15) having electrically conductive property. The bonding material (15) contains electrically conductive particles and fibrous bodies (16) having electrically insulating properties, and a major axis direction of the fibrous bodies (16) is oriented in a predetermined direction in regions where the electrically conductive members (4) face to the each adjacent cell (3).