In an embodiment, a unitized fuel cell includes a cell frame, a plurality of separators each including a cooling medium guide part extending from a manifold hole and having a selected area, a plurality of support protrusions protruding from the guide part of each of the separators toward the cooling surface, spaced apart from each other, and including a cooling medium flow field between the spaced protrusions, and an adhesive medium between the cell frame and the reaction surface on the guide part of each of the separators to provide a coupling force to each of the separators and the cell frame. In some embodiments, the adhesive medium does not overlap the plurality of support protrusions on the guide part.

A contacting arrangement of solid oxide cells is disclosed, each solid oxide cell having at least two flow field plates to arrange gas flows in the cell, and an active electrode structure, which has an anode side, a cathode side, and an electrolyte element between the anode side and the cathode side. The contacting arrangement includes a gasket structure to perform sealing functions in the solid oxide cell and a contact structure located between the flow field plates and the active electrode structure, the contact structure being at least partly a gas permeable structure configured and adapted according to structures of the flow field plates and according to the active electrode structure.

The invention relates to an electrochemical cell comprising an anode and a cathode compartments separated by a membrane, having corresponding electrodes; said anode and cathode compartments each having an external wall, flanged areas designed like frames in the contact area of the compartments, and a gas diffusion electrode comprising a liquid-permeable carrier coated with a catalyst material; said gas diffusion electrode featuring an area not coated with catalyst at its bottom edge, said area, at the bottom end of the electrochemical cell, protruding between the flanged areas of the external wall of the cathode compartment and the flanged areas of the external wall of the anode compartment in the contact area of the compartments; a porous material arranged parallel between the gas diffusion electrode and the membrane, and devices for the supply and discharge of gas and electrolyte, with a gas space separated from an electrolyte space by appropriate means.

A fuel cell comprises a membrane electrode assembly configured such that electrode catalyst layers are formed on respective surfaces of an electrolyte membrane; gas diffusion layers placed on respective surfaces of the membrane electrode assembly; and a frame placed around periphery of the membrane electrode assembly. The membrane electrode assembly has a protruding portion that is configured by protruding outside of the gas diffusion layer in a state that the membrane electrode assembly is combined with the gas diffusion layers. The frame has an engagement portion that is configured to engage with the protruding portion. An adhesive layer is formed from an ultraviolet curable adhesive between the protruding portion and the engagement portion.

An electrochemical system has at least one endplate, a terminal bipolar plate as well as a sealing device arranged between the endplate and the terminal bipolar plate. The materials of the terminal bipolar plate and the endplate have different coefficients of thermal expansion and with the sealing device being designed in such a way that during temperature changes, the sealing function is also given by a sliding of the endplate and/or the terminal bipolar plate along the sealing device.

An embodiment includes a reworkable fuel cell stack in which a first separator and a second separator forming one fuel cell are bonded to a membrane electrode assembly (MEA) by a hot-melt adhesive, the first separator is bonded to a third separator of another fuel cell by a first UV adhesive film, and the second separator is bonded to a fourth separator of yet another fuel cell by a second UV adhesive film, so that, among a plurality of fuel cells, a specific fuel cell that is defective is easily selectively separated from the fuel cell stack, and is easily replaced with a new or replacement fuel cell.

An embodiment includes a reworkable fuel cell stack in which a first separator and a second separator forming one fuel cell are bonded to a membrane electrode assembly (MEA) by a hot-melt adhesive, the first separator is bonded to a third separator of another fuel cell by a first UV adhesive film, and the second separator is bonded to a fourth separator of yet another fuel cell by a second UV adhesive film, so that, among a plurality of fuel cells, a specific fuel cell that is defective is easily selectively separated from the fuel cell stack, and is easily replaced with a new or replacement fuel cell.

A method of operating a solid oxide electrolyzer cell stack includes providing steam into a fuel internal riser extending through the solid oxide electrolyzer cell stack at a pressure of at least 15 psig, and electrolyzing the steam in the solid oxide electrolyzer cell stack to generate a hydrogen containing product stream at a pressure of at least 15 psig.

A method of operating a solid oxide electrolyzer cell stack includes providing steam into a fuel internal riser extending through the solid oxide electrolyzer cell stack at a pressure of at least 15 psig, and electrolyzing the steam in the solid oxide electrolyzer cell stack to generate a hydrogen containing product stream at a pressure of at least 15 psig.

Disclosed are: a humidifier for a fuel cell, which can reliably prevent gas leaks due to repeated operations and shutdowns of a fuel cell and can be manufactured with relatively low manufacturing costs and high productivity as well; and a method for manufacturing same. A humidifier for a fuel cell of the present invention comprises a humidification module and caps coupled to both ends of the humidification module, respectively. The humidification module comprises: a mid-case having a step on the inner peripheral surface thereof; a plurality of hollow fiber membranes in the mid-case; a fixation layer on which ends of the hollow fiber membranes are potted; a bracket which is supported by the step of the mid-case and is in contact with the fixation layer; and a packing member in contact with the bracket and having a groove into which an end of the mid-case is inserted.