The present disclosure relates to a method of producing a separator for a fuel cell in which layers having corrosion resistance and conductivity are formed on a stainless steel base material, the method including (i) a process of removing a passive layer on a surface of a stainless steel base material to obtain a stainless steel base material from which the passive layer has been removed, (ii) a process of forming layers having corrosion resistance and conductivity on the surface of the stainless steel base material from which the passive layer has been removed to obtain a corrosion-resistant conductive layer-deposited stainless steel base material, and (iii) a process of annealing the corrosion-resistant conductive layer-deposited stainless steel base material in a temperature range of 250° C. or higher and lower than 550° C. under conditions of oxygen being contained.

The present disclosure relates to a method of producing a separator for a fuel cell in which layers having corrosion resistance and conductivity are formed on a stainless steel base material, the method including (i) a process of removing a passive layer on a surface of a stainless steel base material to obtain a stainless steel base material from which the passive layer has been removed, (ii) a process of forming layers having corrosion resistance and conductivity on the surface of the stainless steel base material from which the passive layer has been removed to obtain a corrosion-resistant conductive layer-deposited stainless steel base material, and (iii) a process of annealing the corrosion-resistant conductive layer-deposited stainless steel base material in a temperature range of 250° C. or higher and lower than 550° C. under conditions of oxygen being contained.

To provide a fuel cell system capable of evaluating degradation of an electrolyte membrane by quantifying metal ions involved in degradation of an electrolyte membrane instead of evaluating degradation of an electrolyte membrane itself. A fuel cell system comprising a fuel cell, a fuel gas system for supplying fuel gas to an anode of the fuel cell, an oxidant gas system for supplying oxidant gas to a cathode of the fuel cell, a voltage detector for detecting a voltage of the fuel cell, and a controller.

A close-end fuel cell and an anode bipolar plate thereof are provided. The anode bipolar plate includes an airtight conductive frame and a conductive porous substrate disposed within the airtight conductive frame. In the airtight conductive frame, an edge of a first side has a fuel inlet, and an edge of a second side has a fuel outlet. The conductive porous substrate has at least one flow channel, where a first end of the flow channel communicates with the fuel inlet, a second end of the flow channel communicates with the fuel outlet. The flow channel is provided with a blocking part near the fuel inlet to divide the flow channel into two areas.

An inspection system of a member for a fuel cell separator including a titanium or titanium alloy base material and a coating layer including carbon includes a heater configured to heat the member for a fuel cell separator, a temperature detector configured to detect a temperature of the member for a fuel cell separator after heated by the heater, and a determination unit configured to determine a position of a high-temperature place at which a degree of a temperature increase is greater than a previously-set standard in the member for a fuel cell separator using the temperature detected by the temperature detector.

This disclosure relates to a hydrogen fuel cell stack with one or more hydrogen fuel cell (102) having in turn a proton exchange membrane (104), a hydrogen reaction layer (112) and an oxygen reaction layer (116) within a pair of bipolar plates (106). At least a bipolar plate (106) comprises a channel (108) inside for hydrogen inflow. Additionally, this disclosure relates to a method of upgrading a hydrogen fuel cell stack, said method comprising inserting a channel (108) for hydrogen inflow inside at least a bipolar plate (106).

This disclosure relates to a hydrogen fuel cell stack with one or more hydrogen fuel cell (102) having in turn a proton exchange membrane (104), a hydrogen reaction layer (112) and an oxygen reaction layer (116) within a pair of bipolar plates (106). At least a bipolar plate (106) comprises a channel (108) inside for hydrogen inflow. Additionally, this disclosure relates to a method of upgrading a hydrogen fuel cell stack, said method comprising inserting a channel (108) for hydrogen inflow inside at least a bipolar plate (106).

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)=LN×TO)/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.

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)=LN×TO)/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 embodiment is a fuel cell including a stacked body of single cells each of which includes a power generating unit and separators disposed on both surfaces of the power generating unit, in which the separators each include a metal base material, a carbon layer made of carbon and formed on a first surface of the metal base material on a power generating unit side, and a titanium nitride layer made of titanium nitride and formed on a second surface of the metal base material opposite to the first surface.