911results about "Collectors/separators" patented technology

The invention relates to a solid oxide fuel cell and a preparation method thereof. The solid oxide fuel cell comprises a sheet substrate, a first cell monomer and a second cell monomer, wherein the first cell monomer and the second cell monomer are fixed on the front and back surfaces of the sheet substrate; each of the first battery monomer and the second battery monomer comprises a porous supporting layer, an anode functional layer, an electrolyte layer and a cathode functional layer which are sequentially stacked and connected; the sheet body substrate is connected between the porous support layer of the first battery monomer and the porous support layer of the second battery monomer; a separation groove is formed in the sheet body substrate, and a fuel gas flow channel is formed among the separation groove, the first battery monomer and the second battery monomer. After the pipeline connected with the fuel gas is communicated with the fuel gas flow channel, the fuel gas only flows in the fuel gas flow channel, and the fuel gas flow channel has good sealing performance. And the porous supporting layer, the anode functional layer, the electrolyte layer and the cathode functional layer are planar sheet bodies which are printed and formed layer by layer, so that the manufacturing difficulty is low, industrial large-scale manufacturing is facilitated, and the production cost is reduced.

The invention belongs to the technical field of bipolar plate materials for flow batteries, relates to a composite bipolar plate material as well as a preparation method and application thereof, and is suitable for bipolar plate materials for flow batteries. According to the bipolar plate of the flow battery, the three-dimensional porous foam metal is used as the matrix and is positioned in the middle layer, so that the overall strength and toughness of the bipolar plate can be improved, and meanwhile, the problems of local overheating and the like caused by non-uniform heating of zinc deposition in a charge-discharge test of a sedimentary flow battery such as a zinc ferroelectric pile are solved, so that the long-term operation of the battery is influenced; and the porous foam metal can well transfer heat and enable the heat to be uniformly distributed, so that the porous foam metal has a good application prospect in the sedimentary flow battery. The composite material is adhered to the two sides of the bipolar plate through a hot pressing process, so that the corrosion resistance of the bipolar plate can be ensured, meanwhile, the foam metal constructs an efficient conductive network in the bipolar plate, the foam metal and the composite material can form a synergistic conductive effect, and the electron transmission capability of the bipolar plate is also improved; in the manufacturing process, carbon paper / carbon fiber cloth is added to the upper side and the lower side at the same time, so that the surface resistance of the bipolar plate is reduced, and the performance of the bipolar plate in a flow battery is further improved.

The invention relates to a method for manufacturing a bipolar plate (10, 51) for an electrochemical cell unit (53) for converting electrochemical energy into electrical energy as a fuel cell unit (1) and / or for converting electrical energy into electrochemical energy as an electrolytic cell unit (49) having stacked electrochemical cells (52), the method comprising the steps of: providing a first plate 64) and a second plate (65), stacking the first plate (64) and the second plate (65) on top of one another such that inner surfaces (66) of the first and second plate (64, 65) lie on top of one another, applying contact forces to the first and second plates (64, 65) by means of negative pressure in a negative pressure chamber (104) relative to an ambient pressure so that, as a result of the contact forces applied by the ambient pressure, the inner surfaces (66) of the first and second plate (64, 65) lie on top of one another with an additional compression force in a contact region (68) due to the applied contact forces, producing at least one welded joint (69) between the first and second plate (64, 65) by means of a laser beam (74), forming connection channels (89) for process fluids in the first and / or second plate (64, 65), the channels opening into fluid openings (41) in the bipolar plates (10), 51) and into channels (12, 13, 14) for process fluids in the bipolar plates (10, 51), forming connection openings (93) in the first and / or second plate (64, 65) which connect the connection channels (89) to the channels (12, 13, 14) for process fluids in the bipolar plates (10, 51), the connection openings (93) being formed in the first and / or second plate (64, 65) by means of a laser beam (74).

To provide a fuel cell that can be constructed thinly while ensuring sufficient thickness of the gas diffusion layer. [Solution] A fuel cell cell that generates electricity by the reaction of a reaction gas comprises a membrane electrode assembly having an electrolyte membrane and a catalyst layer, a gas diffusion layer laminated on the membrane electrode assembly and made of a porous metal, and a separator laminated on the gas diffusion layer and parallel to the plane direction of the membrane electrode assembly, wherein the gas diffusion layer has grooves through which the reaction gas flows on the separator side.

To provide a fuel cell cell having a separator that can improve drainage performance. [Solution] The fuel cell cell comprises a membrane electrode assembly, a pair of gas diffusion layers provided so as to sandwich the membrane electrode assembly, and a pair of separators provided so as to sandwich the pair of gas diffusion layers. At least one of the pair of separators has a flow channel portion through which the reaction gas flows on the surface facing the gas diffusion layer, and a rib portion provided adjacent to the flow channel portion and in contact with the gas diffusion layer. The flow channel portion has a bottom surface away from the gas diffusion layer and a side portion connecting the bottom surface and the rib portion, and the side portion is provided with a groove extending from the connection portion with the rib portion toward the bottom surface.

A separator for a fuel cell includes a rectangular plate-shaped body. The body forms passages through which gas flows. The body includes central regions and a reversing region. The central regions extend along one side of the body, and are arranged in a direction in which another side of the body that intersects the one side extends. The passages include multiple central passage sections that extend in the longitudinal direction through each central region, and a reversing passage section that extends through the reversing region and connects the central passage sections of adjacent ones of the central regions. The ribs are formed such that two or more of the central passage sections are formed in each of the central regions, and the reversing passage section in the reversing region is connected to two or more of the central passage sections in the corresponding central region.

The invention belongs to the technical field of surface engineering, and relates to a preparation method of a protective coating for a metal connector of a solid oxide battery. A compact transition metal oxide inner layer is deposited on a metal substrate in a reactive sputtering mode, then a transition metal alloy outer layer is deposited in a metal sputtering mode, a transition metal oxide / transition metal alloy composite coating is formed, and a spinel protective layer is formed after annealing treatment. According to the method, a transition metal oxide inner layer is used as a diffusion barrier layer, diffusion of elements such as Cr from a substrate to a coating and diffusion of oxygen to the substrate in the high-temperature annealing and long-term service process are effectively inhibited, and therefore the thickness of a reaction layer and the thickness of a thermal growth oxide layer are remarkably reduced. The composite coating is compact in structure, stable in component, good in matching with the thermal expansion coefficient of the substrate, excellent in oxidation resistance and low in surface specific resistance, and capable of effectively improving the long-term operation stability and prolonging the service life of the SOC connector.

The present invention provides a membrane electrode assembly which is provided with: a polymer electrolyte membrane; a pair of electrode catalyst layers that are in contact with the surfaces of the polymer electrolyte membrane, while having the polymer electrolyte membrane sandwiched therebetween; and gas diffusion layers that are respectively superposed on the pair of electrode catalyst layers. Each of the gas diffusion layers comprises a microporous layer that is in contact with one of the electrode catalyst layers, and a diffusion base material layer that is formed of a fiber base material. The average fiber diameter of fiber materials contained in the diffusion base material layer is 10 to 150 times the average fiber diameter of fibrous substances contained in the electrode catalyst layers.

The invention discloses a metal stack cavity header tube region polar plate anti-corrosion structure and an applied stack thereof. The stack comprises a plurality of groups of stacked metal bipolar plates, wherein a corrosion sacrifice structure is arranged on the metal bipolar plate on the high-voltage side of a fuel cell stack close to the liquid outlet side of a circulation cavity in an extending manner along a second direction; according to the corrosion sacrifice structure, the overlapped edge area of the metal bipolar plate and the insulating sealing gasket can be subjected to electrochemical corrosion preferentially, corrosion of the interior of a galvanic pile to a polar plate material is reduced and avoided, a corrosion reaction can occur preferentially in a designed corrosion area, and on the premise that the material cost is not increased and the design compactness is not sacrificed, the service life of the galvanic pile is prolonged. The discharge area can be effectively increased, corrosion current can be intercepted in advance, the corrosion resistance of the metal bipolar plate is effectively improved, the highest potential and the reaction active area of the adjacent power generation unit are protected, and the service life of the fuel cell stack is remarkably prolonged.

To provide a method for manufacturing a member with rubber capable of suppressing generation of burrs of a rubber member, an adhesive sheet, and a member with rubber, in order to solve the problem of the need for a process for removing burrs.SOLUTION: A method for manufacturing a member with rubber comprises a step (S12) of contacting an adhesive sheet having a concave structure on a first surface with an uncrosslinked rubber member, and contacting the adhesive sheet on a second surface of the adhesive sheet with a substrate, and a step (S13) of heating the rubber member to bond the substrate and the rubber member.SELECTED DRAWING: Figure 1

Provided is a stainless steel having excellent oxidation resistance, Cr poisoning resistance, and electrical conductivity not only in the use environment of SOFC, but also in the use environment of SOEC. In the present invention, the component composition is appropriately controlled, in particular, 0.60-1.50 mass% of Al, 0.20-0.45 mass% of Nb, 20.0-30.0 mass% of Cr, and 0.05-0.50 mass% of Si, and the relationship of the following formulae (1) and (2): 0.03 * [Cr] + [Al] < = 2.20 (1) and 0.44 * [Si] + [Al] < = 1.52 (2) are satisfied.

A stack (1), particularly for gas separation, comprising at least two electrochemical cells (2) is proposed. Each electrochemical cell (2) has several layers (3), in particular an anode (4), a cathode (5), and a separator (6) separating the anode (4) from the cathode (5). According to the invention, two electrochemical cells (2) each form a cell pair (7), the cells (2) of which are oriented such that either the cathodes (5) or the anodes (4) face each other, wherein a bipolar plate (8) is arranged between two cathodes (5) of a cell pair (7) or between the cathodes (5) of two stacked cell pairs (7), and a gas or gas mixture can be supplied via the two cathodes (5).

Disclosed is a bipolar plate for a fuel cell stack. The article has two metal plates, each with inlets, outlets, and contours bordering wavy channels. At least some of the channels are partly divided into multiple channels near one end by the contours. The divided channels merge at the other end in a different combination from when they were divided.

Disclosed is a solid oxide stack. The solid oxide stack according to the present invention includes: a module formed by stacking a plurality of unit cells; an upper manifold and a lower manifold installed to support a top surface and a bottom surface of the module, respectively; wherein each unit cell includes a cell frame with a central opening, an air electrode current collector, a solid oxide cell, and a fuel electrode current collector sequentially stacked and seated within the central opening, an interconnect formed on the cell frame having a fuel flow channel on one surface and an air flow channel on the opposite surface, a cell sealant positioned at the interface between the cell frame and the solid oxide cell, and a fuel electrode sealant positioned at the interface between the cell frame and the interconnect; and wherein the air flow channel opens to at least one side of the module. According to the present invention, the stack provides a removable modular unit structure without requiring an air electrode sealant, allowing defective or aged cells to be easily replaced without affecting the stack's overall performance. This simplifies maintenance, extends the stack's lifespan, and reduces operational costs.

A terminal plate for fuel cell comprises: a plate body having a quadrilateral shape in a plan view and used for current collection; and a terminal provided at one side of the plate body, and including a joint part joined to the plate body and an output part joined to the plate body via the joint part. The joint part includes a first projection projecting in a first direction parallel to a direction in which the one side extends. The output part has a center in the first direction that is spaced apart from a center of the one side toward a second direction opposite to the first direction.

The invention relates to a method for processing and joining bipolar plates (10) which are provided with sealing seams (56) for sealing between an active area (14) and media ports (18, 20, 22, 24, 26). At least the following process steps are carried out: In process step a), a warped bipolar plate (10, 54) is provided in a processing and joining station (28); in process step b), processing tools (34, 38) and joining tools (31) are positioned against the warped bipolar plate (10, 54) such that the joining tools (31) exert a holding and joining force (64) on the warped bipolar plate (10, 54). According to process step c), the machining tools (34, 38) contact the distorted bipolar plate (10, 54) and produce a plastic deformation (68) of the distorted bipolar plate (10, 54) by means of a straightening force (62).Subsequently, in process step d), a material-bonded electrical contact (82) is created on one side of the previously straightened bipolar plate (10, 84). Following process step e), the processing and joining station (28) is opened (78, 80) and the joined and straightened bipolar plate (10, 84) is removed.

The present invention addresses the problem of providing a fuel cell capable of effectively suppressing deterioration of an electrolyte membrane. A fuel cell is provided with a separator having a flow path and an electrolyte membrane, and the surface of the flow path in the vicinity of a hydrogen outlet of the separator is covered with cerium.

According to a first aspect of the present invention there is provided a method of coating a bipolar plate, comprising the steps of: providing a bipolar plate wherein at least an outer layer of the bipolar plate comprises metallic titanium; and performing laser nitridation on the bipolar plate so as to form a titanium nitride coating on the outer surface of the bipolar plate. The inventors have found that laser nitridation of a titanium bipolar plate results in a bipolar plate having a high stability TiN coating which has good conformality, chemical stability and / or high conductivity. Furthermore, the formation of the TiN coating by laser nitriding can be well integrated into a manufacturing process of a bipolar plate, such as a roll-to-plate process including a laser welding step, compared to a deposition method known in the prior art, and has the advantages of high efficiency and simplification. The TiN coating on the bipolar plate can be directly used for an electrochemical reactor or can be used as a substrate of a subsequent coating.

The invention relates to a bipolar plate for an electrochemical system and an electrochemical system with a plurality of stacked such bipolar plates, as well as a method for manufacturing such bipolar plates. The electrochemical system can, in particular, be a fuel cell system, an electrochemical compressor, an electrolyzer, or a redox flow battery.

The present disclosure relates to a bilayer polymer electrolyte membrane comprising a first layer and a second layer, the first layer comprising a perfluorosulfonic acid and the second layer comprising a crosslinked polysulfonated polymer, the first layer disposed on the second layer. The present disclosure further relates to methods of making the bilayer polymer electrolyte membrane, as well as membrane electrode assemblies and fuel cells comprising the bilayer polymer electrolyte membrane.

To provide a separator for a fuel cell capable of sufficiently securing conductivity.SOLUTION: A fuel cell separator of the present invention includes: a metal substrate; a titanium layer provided on the metal substrate; and a carbon layer provided on the titanium layer, wherein a TiC component ratio in a boundary region between the titanium layer and the carbon layer is 70% or less.SELECTED DRAWING: Figure 1

A solid oxide cell includes a support including a support plate and a leg portion supporting the support plate at an outer edge of the support plate, and a unit cell disposed opposite the leg portion on the support plate and including a fuel electrode, an air electrode, and an electrolyte disposed between the fuel electrode and the air electrode, in which, when a thickness direction of the support plate is a first direction, the outer edge of the unit cell overlaps the leg portion in the first direction.

The invention relates to a metal diaphragm and a manufacturing method thereof. According to the metal separator and the manufacturing method thereof, conductivity and corrosion resistance can be excellent at the same time.

The application discloses a combined grid type flow field transition device, a fuel cell flow field plate and a fuel cell. The combined grid type flow field transition device comprises a central horizontal grid area and two lateral vertical grid areas. The central horizontal grid area is arranged at a gas opening of the flow field plate, and the two lateral vertical grid areas are arranged on the two sides of the central horizontal grid area. The gas enters the central horizontal grid area from the gas opening to form a horizontal flow. The horizontal flow is uniformly distributed and converted into a uniform vertical flow through the two lateral vertical grid areas, and then enters a reaction area to react. The device adopts a combined design of the central horizontal grid area and the lateral vertical grid areas, simultaneously has the functions of horizontal flow generation and distribution, and is a combination of the central area and the two side areas. The device can achieve the effect of flow uniform distribution with small resistance, that is, "drag reduction and efficiency improvement", and can further strengthen the water and heat management capability of the battery and improve the performance and durability of the fuel cell.

To provide a fuel battery cell.SOLUTION: The invention includes: a membrane electrode assembly (MEA); a separation plate laminated on one surface of the membrane electrode assembly; a beading portion which is provided protruding on one surface of the separation plate facing the membrane electrode assembly; and a sealing member which is provided between the membrane electrode assembly and the beading portion and seals a space between the membrane electrode assembly and the separation plate. The structure can attain advantageous effects such as securing rigidity and improvement of safety and reliability.SELECTED DRAWING: Figure 1

This invention provides a battery bipolar plate, a battery stack, and a fuel cell. The battery bipolar plate includes a gas-conducting region and a conductive region, which are not in contact. The battery stack includes a positive end plate, an anode insulating plate, an anode current collector, a battery bipolar plate, a non-uniform membrane electrode assembly, a battery bipolar plate, a cathode current collector, a cathode insulating plate, and a cathode end plate, which are sequentially stacked and fixed by a fastening device. In this invention, by structurally dividing the battery bipolar plate into gas-conducting and conductive regions, the power density of the battery stack is improved, and the heat dissipation function of the battery stack is effectively enhanced. This results in an 18% reduction in the voltage decay rate of the assembled fuel cell, i.e., an 18% improvement in durability, making it suitable for industrial-scale application.

The invention belongs to the technical field of fuel cells, and particularly relates to a PEM fuel cell membrane electrode and a preparation method thereof. The preparation method of the PEM fuel cell membrane electrode provided by the invention comprises the following steps: preparing composite hydrophilic resin and composite hydrophobic resin, preparing cathode first catalyst layer slurry by adopting the composite hydrophilic resin, and controlling the spraying rate to obtain a cathode first catalyst layer of which the content of the composite hydrophilic resin is gradually changed; preparing cathode second catalyst layer slurry by adopting composite hydrophobic resin, controlling the spraying rate to obtain a cathode second catalyst layer with gradually changed composite hydrophobic resin content, and performing transfer printing and hot pressing on the cathode first catalyst layer, the cathode second catalyst layer, the anode catalyst layer and a proton membrane to obtain a membrane electrode, wherein the content of the composite hydrophilic resin in the first catalyst layer of the cathode is uniformly reduced from top to bottom along the gravity direction, and the content of the composite hydrophobic resin in the second catalyst layer of the cathode is uniformly increased from top to bottom along the gravity direction.

The application discloses a sealing structure, a fuel cell and a manufacturing method of the sealing structure. The sealing structure comprises a sealing part, a channel part and at least two cavities. The sealing part is used for surrounding a sealing loop. The channel part is connected with the sealing part and is used for at least partially connecting the adjacent two cavities. The channel part comprises at least one supporting part and at least one connecting part. The supporting part is fixedly connected with the connecting part. In the embodiment, the supporting part of the channel part is connected with the sealing part through the connecting part, so that the sealing structure is an integral whole. When the sealing structure is prepared, the sealing structure can be formed only once, the workload of preparing the sealing structure is simplified, and the preparation efficiency of the sealing structure is improved.

A separator according to an embodiment including: a flow channel comprising flow-channel walls and flow-channel grooves provided between the flow-channel walls; a supply manifold; an exhaust manifold; a supply connection channel connecting one end of the flow channel to the supply manifold; and an exhaust connection channel connecting the other end of the flow channel to the exhaust manifold. The supply connection channel or / and the exhaust connection channel comprise one or more first protrusion-wall groups including first protrusion-walls and one or more second protrusion-wall groups including second protrusion-walls. The first protrusion-walls are aligned in a second direction which is a vertical direction relative to a first direction which is parallel to the flow-channel grooves at the end portion of the flow channel. The second protrusion-walls are aligned in a second direction. The first protrusion-wall groups and the second protrusion-wall groups are aligned in the first direction. The second protrusion-wall groups are offset in the second direction from the first protrusion-wall groups.