A bonding device of a fuel cell part is disclosed. The bonding device of the fuel cell part may bond an upper gas diffusion layer and a lower gas diffusion layer to top and bottom surfaces of an MEA base material through adhesive layers, while disposing the MEA base material between the upper gas diffusion layer and the lower gas diffusion layer, and may include: a lower die that supports the MEA base material, the upper gas diffusion layer, and the lower gas diffusion layer to be bonded with each other; an upper die installed in an upper side of the lower die; and an ultrasonic wave vibration source that is installed to be capable of moving in a vertical direction at opposite sides of the upper die, compressing the upper gas diffusion layer, and applying ultrasonic wave vibration energy to the adhesive layer.

A membrane electrode assembly and a method of manufacturing an electricity generating assembly include a pair of gas diffusion layers disposed on both surfaces of the membrane electrode assembly. Coupling agents are applied on surfaces of the gas diffusion layers, modifying surfaces of the gas diffusion layers. A coupling agent-friendly adhesive is applied to the surfaces of the gas diffusion layers to which the coupling agents are applied, forming adhesion layers on surfaces of the gas diffusion layers. The gas diffusion layers are stacked on the surfaces of the membrane electrode assembly, causing the adhesion layers to come into contact with the first and second surfaces of the membrane electrode assembly.

A single fuel cell includes: a membrane electrode assembly; gas diffusion layers 3c and 3a that placed on both side surfaces of the membrane electrode assembly, respectively so that an outer peripheral edge portion remains in one side surface of the membrane electrode assembly; an adhesive layer formed to cover the outer peripheral edge portion; and a support frame fixed on the adhesive layer. The support frame includes: a support frame body made of resin; and coating layers formed to cover both side surfaces of the support frame body, respectively. The support frame is fixed on the adhesive layer so that the support frame is spaced from the gas diffusion layer on the one side surface of the membrane electrode assembly, and the single fuel cell further includes a protecting layer formed to cover an end of the interior portion of the support frame body.

A single fuel cell includes: a membrane electrode assembly; gas diffusion layers 3c and 3a that placed on both side surfaces of the membrane electrode assembly, respectively so that an outer peripheral edge portion remains in one side surface of the membrane electrode assembly; an adhesive layer formed to cover the outer peripheral edge portion; and a support frame fixed on the adhesive layer. The support frame includes: a support frame body made of resin; and coating layers formed to cover both side surfaces of the support frame body, respectively. The support frame is fixed on the adhesive layer so that the support frame is spaced from the gas diffusion layer on the one side surface of the membrane electrode assembly, and the single fuel cell further includes a protecting layer formed to cover an end of the interior portion of the support frame body.

Electrochemical systems comprising separator plates and the separator plates comprising a first individual plate and a second individual plate. The individual plate comprising: an electrochemically active region, at least one through-opening and a sealing bead. Conveying channels adjoin a bead flank of the sealing bead and the conveying channels connecting the through-opening and the sealing bead interior. A plurality of first weld sections connecting the two individual plates and the first weld sections extend in the direction of the first conveying channels and arranged between the first conveying channels.

An embodiment gas diffusion layer unit for a fuel cell includes a gas diffusion layer disposed on a surface of a membrane electrode assembly and a sub-gasket, the sub-gasket surrounding and supporting an edge of the membrane electrode assembly, and an elastic member provided in a predetermined area of an edge of the gas diffusion layer, the elastic member being integrated with the gas diffusion layer and being in contact with the sub-gasket.

An embodiment gas diffusion layer unit for a fuel cell includes a gas diffusion layer disposed on a surface of a membrane electrode assembly and a sub-gasket, the sub-gasket surrounding and supporting an edge of the membrane electrode assembly, and an elastic member provided in a predetermined area of an edge of the gas diffusion layer, the elastic member being integrated with the gas diffusion layer and being in contact with the sub-gasket.

An apparatus for manufacturing a membrane-electrode assembly for a fuel cell is provided. The apparatus includes a sub-gasket feeding unit that forms first electrode windows, unrolls a first sub-gasket sheet, and supplies the sheet to a transfer line. An electrode membrane loading unit installed over the transfer line forms electrode catalyst layers on both faces of an electrolyte membrane, collects the electrode membrane sheet cut, and loads the sheets onto first electrode windows. A sub-gasket loading unit installed over the transfer line forms second electrode windows, collects a second sub-gasket sheet, and loads the sheets on the electrode membrane sheet. MEA bonding units installed on the transfer line bond the first sub-gasket sheet, the electrode membrane sheet, and the second sub-gasket sheet mutually stacked while passing the first sub-gasket sheet, the electrode membrane sheet, and the second sub-gasket sheet between a pair of hot rollers along the transfer line.

An apparatus for manufacturing a membrane-electrode assembly for a fuel cell is provided. The apparatus includes a sub-gasket feeding unit that forms first electrode windows, unrolls a first sub-gasket sheet, and supplies the sheet to a transfer line. An electrode membrane loading unit installed over the transfer line forms electrode catalyst layers on both faces of an electrolyte membrane, collects the electrode membrane sheet cut, and loads the sheets onto first electrode windows. A sub-gasket loading unit installed over the transfer line forms second electrode windows, collects a second sub-gasket sheet, and loads the sheets on the electrode membrane sheet. MEA bonding units installed on the transfer line bond the first sub-gasket sheet, the electrode membrane sheet, and the second sub-gasket sheet mutually stacked while passing the first sub-gasket sheet, the electrode membrane sheet, and the second sub-gasket sheet between a pair of hot rollers along the transfer line.

A method for manufacturing a membrane-electrode assembly for a fuel cell comprises the following steps: a first step during which a chemical catalyst element is deposited on a first face of an ion-exchanging membrane, the membrane being held on a support film; a second step during which the membrane is unglued from the support film; a third step during which the membrane is inserted between two reinforcing elements; and a fourth step during which a chemical catalyst element is deposited on the part left free of the second face of the membrane.