538 results about "Gas diffusion layer" patented technology

The invention discloses a bipolar plate structure optimization method and system based on flow field data analysis, and relates to the technical field of fuel cells. The method comprises the following steps: establishing a parameterized bipolar plate runner geometric solid model; performing compression deformation simulation of a gas diffusion layer on the bipolar plate flow channel geometric solid model to obtain physical field data of the gas diffusion layer, and calculating a porosity distribution field and a local mass transfer impedance coefficient field based on the physical field data; based on the porosity distribution field and the local mass transfer impedance coefficient field, multi-physics field coupling simulation is carried out, and a local performance contribution degree field is obtained; constructing a comprehensive loss function according to the local mass transfer impedance coefficient field and the local performance contribution degree field; and with the purpose of minimizing the comprehensive loss function, iterative optimization is carried out on the design variables through an optimization algorithm until convergence conditions are met, and an optimal design variable combination is output. Through parametric modeling, multi-physics field coupling simulation and comprehensive loss function evaluation, efficient optimization of the bipolar plate design is realized.

The invention relates to the technical field of air electrode preparation, in particular to a metal-loaded super-hydrophobic air electrode, a preparation method and chlorine production application, the air electrode comprises a high-hydrophobicity gas diffusion layer obtained through polytetrafluoroethylene modification, and the metal-loaded super-hydrophobic air electrode is prepared through a corona etching and electrochemical in-situ deposition technology. A uniform and highly-dispersed metal catalyst layer directly grows on the surface of the polytetrafluoroethylene substrate, so that the gas diffusion electrode with excellent mass transfer performance and an efficient catalytic function is obtained; the prepared electrode is used for carrying out electrochemical catalysis on a water body containing chloride ions by adopting a cyclic voltammetry method, and active chlorine can be efficiently generated in situ; the prepared metal-loaded super-hydrophobic air electrode has the advantages of being low in oxygen mass transfer resistance, high in catalyst utilization rate, free of generation of by-products, capable of efficiently generating active chlorine and the like, and has wide application potential in actual water environment disinfection.

The invention relates to the technical field of new energy materials, and discloses a gradient porous three-dimensional interpenetrating network direct ammonia fuel cell membrane electrode. The gradient porous three-dimensional interpenetrating network direct ammonia fuel cell membrane electrode comprises an exchange membrane, an anode catalyst layer, a cathode catalyst layer and a gas diffusion layer, wherein the anode catalyst layer and the cathode catalyst layer have gradient pore size distribution from the exchange membrane side to the gas diffusion layer side; wherein the interiors of the anode catalyst layer and the cathode catalyst layer are provided with three-dimensional interpenetrating network structures. According to the invention, the utilization rate of the catalyst is improved by 30-50%, the mass transfer resistance is reduced by 40-60%, the interface contact is improved, the controllability of the preparation process is improved, the structural stability is enhanced, the power density of the direct ammonia fuel cell reaches 250-300mW / cm < 2 >, the performance retention rate after 5000 cycles can reach 85% or more, and the method has remarkable technical advantages and application prospects.

The invention discloses a dimension reduction modeling method suitable for a proton exchange membrane fuel cell short stack, which is characterized in that a membrane electrode assembly is solved by adopting a one-dimensional flux equation, and a PEMFC short stack polar plate, a flow channel and a gas diffusion layer assembly are solved by adopting a three-dimensional computational domain. Comprising a mass conservation equation, a momentum conservation equation, a component conservation equation, an energy conservation equation, a liquid water equation and an electron potential conservation equation; the one-dimensional domain comprises electrochemical reaction, membrane state water, electroosmosis dragging and a flux conservation equation related to a catalytic layer and a proton exchange membrane. A three-dimensional domain calculation result is used as a one-dimensional domain boundary condition, and the one-dimensional domain calculation result is converted into a three-dimensional domain source phase and is connected with the three-dimensional domain through an expansion layer. According to the method, modeling is carried out on the PEMFC short pile, the number of grids can be reduced to one tenth of that of a traditional three-dimensional model, mass and heat transfer, electrochemical reaction, membrane water balance and other processes occurring in the PEMFC are considered, and accurate simulation can be carried out on the PEMFC pile with the activation area exceeding 300 cm < 2 > and the number of battery blocks larger than 10.

A bipolar plate-gas diffusion layer (GDL) assembly for a polymer-electrolyte-membrane fuel cell includes a flat metallic bipolar plate and a porous metal GDL adjacent to and in direct contact with the flat metallic bipolar plate. The porous metal GDL includes flow channels defined by flow channel walls with flow channel surfaces. The flow channel walls and flow channel surfaces have an average porosity generally equal to an average porosity of an interior of the porous metal GDL.

The invention discloses a preparation method of a fuel cell cathode nanofiber catalyst layer with hydrophilic and hydrophobic gradients, which is characterized in that on the basis of preparing the cathode catalyst layer by electrostatic spinning, the hydrophilic and hydrophobic gradients are manufactured in the cathode catalyst layer, so that the part, close to a proton exchange membrane, of the cathode catalyst layer is relatively hydrophilic, and the part, close to a gas diffusion layer, of the cathode catalyst layer is relatively hydrophobic. The method comprises the following specific steps: preparing a catalyst solution and a hydrophobic agent solution, preparing a fuel cell cathode nanofiber catalyst layer with hydrophilic and hydrophobic gradients by adopting electrostatic spinning, post-processing the catalyst layer and assembling a membrane electrode and a fuel cell. Compared with a conventional non-gradient hydrophilic and hydrophobic fuel cell cathode nanofiber catalyst layer, the interior of the catalyst layer has obvious hydrophilic and hydrophobic characteristics. The problem of mass transfer increase of the fuel cell under high current density is improved, and the method has important significance for improving the performance of the proton exchange membrane fuel cell under high current density and promoting commercialization of the proton exchange membrane fuel cell.

The invention discloses an anion exchange membrane electrode and a preparation method and application thereof, and belongs to the technical field of new energy material and catalytic electrode preparation, the method comprises the following steps: S1, preparing an anode catalyst slurry comprising a hydrophobic covalent organic framework material, an anode catalyst, an anion exchange ionomer and a solvent; s2, preparing a cathode catalyst slurry of which the components comprise a cathode catalyst, an anion exchange ionomer and a solvent; and S3, respectively spraying or coating the anode catalyst slurry and the cathode catalyst slurry on two side surfaces of an anion exchange membrane or a gas diffusion layer, and carrying out heat treatment to obtain the anion exchange membrane electrode. The method provided by the invention can solve the problems of large gas-liquid-ion three-phase mass transfer resistance, easy shielding of active catalytic sites by ionomers and unbalanced water management in the membrane electrode assembly in the existing AEMWE device.

The invention relates to the technical field of fuel cell state evaluation, in particular to a fuel cell health state estimation method and system, and the method comprises the steps: continuously collecting the monomer polarization curve, pile AC impedance spectrum and gas flow channel pressure pulsation time sequence data of a target fuel cell in multiple operation cycles; ohm, activation and concentration polarization component decomposition are carried out on the polarization curve, a corresponding voltage loss component is extracted, correlation matching calculation is carried out on the corresponding voltage loss component and an impedance spectrum, and a polarization loss-impedance characteristic mapping relation is constructed. And extracting a pressure fluctuation mode synchronous with the polarization curve time sequence, and identifying an extra concentration difference loss component caused by the gas diffusion barrier by correlating the concentration difference polarization loss voltage. And integrating the component, the mapping relation and a reference aging model to calculate a comprehensive health state index. The multi-aging superposition state of the membrane electrode, the proton exchange membrane and the gas diffusion layer can be accurately reflected, aging inducement distinguishing is refined, and the accuracy of health state characterization is improved.

The invention relates to the technical field of fuel cells, in particular to a fuel cell gas diffusion layer performance comprehensive evaluation method and system and electronic equipment. The method comprises the following steps: acquiring multiple evaluation parameters of a target gas diffusion layer in the fuel cell under an actual working condition; wherein the multiple evaluation parameters comprise a polarization test performance parameter, an electrochemical impedance spectroscopy test performance parameter and a heat conduction test performance parameter; and obtaining a pre-constructed comprehensive evaluation model, and substituting the multiple evaluation parameters into the comprehensive evaluation model to obtain a comprehensive evaluation result of the target gas diffusion layer. Therefore, according to the fuel cell gas diffusion layer performance comprehensive evaluation method and system and the electronic equipment provided by the invention, the problem that an existing evaluation system only measures a single function and neglects a synergistic effect is fundamentally solved, comprehensiveness of evaluation dimensions is realized, designers can be helped to avoid overview decision errors, and the evaluation precision is improved. And a clear basis for model selection or GDL structure optimization guidance can be provided for designers.

The invention discloses a hydrophobic gas diffusion electrode loaded with silver nanoparticles and application of the hydrophobic gas diffusion electrode in electrocatalytic carbon dioxide reduction, and belongs to the technical field of electrocatalysis. The hydrophobic gas diffusion electrode comprises a gas diffusion layer and a catalyst layer sprayed on the gas diffusion layer; the catalyst layer comprises a silver nanoparticle catalytic material, a first ionomer and a second ionomer; wherein the first ionomer is a fluororesin ionomer, and the second ionomer is a quaternized polysulfone ionomer. A system for preparing CO by reducing CO2 through electro-catalysis is constructed, the system comprises an MEA electrolytic cell, a cathode, an anode and an anion exchange membrane, and the cathode adopts the hydrophobic gas diffusion electrode loaded with the silver nanoparticles. The preparation method is mild in preparation condition and environmentally friendly, the modified hydrophobic gas diffusion electrode has high hydrophobicity, efficient conversion of CO2 can be achieved under the high current density, FECO can reach 96.5% under the high current density, and excellent catalytic performance is shown.

The invention discloses a method for preparing a membrane electrode of a proton exchange membrane fuel cell by a template method. The method comprises the following steps: 1) selecting a nano material as a template agent; 2) fixing a template agent on a proton exchange membrane to obtain a proton exchange membrane A; 3) uniformly mixing a catalyst, a solvent and an ionomer to form catalyst ink; 4) spraying the catalyst ink on the proton exchange membrane A and drying to obtain a proton exchange membrane B; 5) placing the proton exchange membrane B in an etching solution to obtain a proton exchange membrane C; and 6) tightly attaching the proton exchange membrane C to the gas diffusion layer, and then carrying out hot pressing at high temperature and high pressure by a hot press to finally obtain the membrane electrode of the proton exchange membrane fuel cell. According to the membrane electrode prepared by the preparation method, an ordered pore channel structure can be constructed in the catalyst layer, so that the mass transfer rate of oxygen and water in the catalyst layer is improved, and the performance of a proton exchange membrane fuel cell is improved.

A toxic ammonia gas absorption system for a liquid ammonia fuel ship, comprising a toxic ammonia gas release source (100), an ammonia gas absorption tank (200), an ammonia gas guide pipe, and a diluted ammonia gas discharge pipe. The ammonia gas absorption tank (200) is provided with an absorbent (201), a gas diffusion layer (202), a liquid level switch (203), a gas phase space (206) and a temperature control device (207). The present system can improve the safety, environmental friendliness and economy of ships using ammonia fuel.

This invention discloses a method for preparing a diffusion layer to improve the peak power of a fuel cell. During the operation of a proton exchange membrane fuel cell, the water vapor required for humidification during the reaction process is transported counter-currently to the water generated in the reaction. When the water generated in the reaction is not drained in time, a "flooding" phenomenon occurs, which severely affects the peak power of the fuel cell. To reduce flooding and optimize gas-liquid transport in the fuel cell, this invention discloses a method for preparing a diffusion layer that enhances water-gas mass transfer and improves the peak power of the fuel cell. This method has advantages such as simple process, low cost, and ease of industrialization.

To suppress bending of an insulating member because the insulation between the separators may not be ensured and misalignment may occur between the layers when the insulating member is bent due to an external force.SOLUTION: A fuel battery cell includes a membrane electrode-gas diffusion layer assembly, a frame-shaped insulating member in contact with the outer periphery of the membrane electrode-gas diffusion layer assembly, and a pair of separators that sandwich the membrane electrode-gas diffusion layer assembly and the insulating member. The separator and the insulating member have protrusions on their outer peripheries within a range where their surfaces contact each other, protruding in a direction perpendicular to the surfaces of the area.SELECTED DRAWING: Figure 3

The utility model discloses a fuel cell module for demonstration teaching and toys, which belongs to the technical field of fuel cells and comprises an anode end plate and a cathode end plate. A first silica gel sealing ring, a first collector plate, a first sealing ring, a membrane electrode assembly, a second sealing ring, a second collector plate and a second silica gel sealing ring are sequentially arranged between the anode end plate and the cathode end plate, the membrane electrode assembly comprises two gas diffusion layers and a membrane electrode piece, and the membrane electrode piece comprises a frame and a CCM arranged in the middle of the frame. The CCM is arranged between the two gas diffusion layers, the anode end plate and the cathode end plate are fixedly connected through bolts, the fuel cell module is simple in structure, air cooling is used for replacing liquid cooling, the heat dissipation structure is simplified, the product cost is reduced, meanwhile, the detachable modular structure is beneficial to cultivating the operational ability of students, and the practical value of the students is improved. And the interest in the renewable energy technology is improved.

The embodiment of the invention discloses an anode gas diffusion layer and a preparation method thereof, an anode electrode and an electrolytic bath, the anode gas diffusion layer comprises a substrate, one side surface of the substrate comprises a hydrophilic region with hydrophilicity and a hydrophobic region with hydrophobicity, the hydrophilic region is arranged in the middle of the surface, and the hydrophobic region is arranged in the middle of the surface. And the hydrophobic region is arranged around the hydrophilic region. The periphery of the substrate has hydrophobicity, so that the hydrophobic area becomes a high-speed channel of oxygen, oxygen can be preferably guided out, retention and blockage of bubbles in a pore channel of the anode gas diffusion layer are reduced, and therefore the oxygen content in hydrogen and the electrolysis voltage are reduced; the middle part of the substrate has hydrophilicity, so that water can be transmitted through the anode gas diffusion layer, uniform distribution of the electrolyte can be promoted, bubble retention can be reduced, and the electrolyte can be continuously and uniformly supplied to the anode catalyst layer.

The present application provides an air-cooled fuel cell capable of improving durability and power generation performance. The air-cooled fuel cell is characterized in that it has, in order, a second separator, a membrane electrode gas diffusion layer assembly, a first separator, and a cooling plate, the sum of the flow path width and the rib width of a third flow path is greater than the sum of the flow path width and the rib width of a first flow path and the sum of the flow path width and the rib width of a second flow path, the first separator, the second separator, and the cooling plate overlap the power generation region of the membrane electrode gas diffusion layer assembly in a plan view, at least a portion of the first flow path, the second flow path, and the third flow path cross each other, the angle θ 12 between the first flow path and the second flow path is 15° or more, the angle θ 13 between the first flow path and the third flow path is 40° or more, and the angle θ 23 between the second flow path and the third flow path is 40° or more.

The invention relates to a method for producing a membrane electrode arrangement (20) for an electrolytic cell (30) by means of direct membrane deposition. The method comprises (i) providing a carrier substrate (1), in particular a gas diffusion layer, for an electrolytic cell (30), (ii) applying a slurry-like first catalyst material (2) directly to the carrier substrate (1), (iii) drying and / or hardening the first catalyst material (2), (iv) directly applying an ionomer plastisol (3) for a membrane of an electrolytic cell, (v) drying and / or hardening the ionomer plastisol (3), (vi), a second catalyst material (4) in the form of slurry is applied directly onto the ionomer plastisol (3), and (vii) the second catalyst material (4) is dried and / or hardened. The invention further relates to a correspondingly produced membrane electrode arrangement (20), to an electrolytic cell (30) comprising said membrane electrode arrangement, and to a corresponding cell stack.

The application discloses a kind of half-cell devices for evaluating electrochemical performance, and its technical scheme is: including workbench, workbench top side is fixed with fixed plate, workbench top is equipped with performance test mechanism, sealing mechanism and suction disc control mechanism;Performance test mechanism includes connecting shell, connecting shell is equipped in workbench top, connecting shell side is equipped with multiple performance test components, performance test component includes fixed collar, fixed collar is fixedly connected with connecting shell, fixed collar inboard is equipped with support sleeve, fixed collar is movably connected with support sleeve, support sleeve inboard is fixedly connected with heat preservation liquid storage tank, the beneficial effects of the present application are: with humidification and heating system, can be tested under different working conditions, it is beneficial to reduce the performance difference obtained with industrial amplification, can also test oxygen reduction, add flow field plate structure, constitute gas diffusion layer, simulate the real working condition of catalyst in industrial application, the structure of catalyst layer, current and potential state are characterized.

The invention relates to a method for producing a gas diffusion layer for a fuel cell on the basis of a planar electrically conductive fibrous material, the fibres of which have good adhesion. The invention also relates to a gas diffusion layer that can be obtained according to said method, to a fuel cell comprising such a gas diffusion layer, and to a fuel cell stack comprising at least two such fuel cells.

The invention discloses a PEM water electrolysis membrane electrode assembly and a preparation method, and relates to the technical field of proton exchange membrane water electrolysis hydrogen production. The assembly comprises a cathode catalyst layer, an anode catalyst layer, a cathode gas diffusion layer, an anode gas diffusion layer, a frame film and an adhesive layer, and the adhesive layer contains UV curing adhesive and pressure-sensitive adhesive which are located between the edge of the catalyst layer and the gas diffusion layer and between the edge of the catalyst layer and the frame film and on the outer side of the frame film respectively. According to the preparation method, a continuous process is adopted, the catalyst layer is formed through intermittent coating, the gas diffusion layer and the frame film are positioned and attached by spraying the UV curing adhesive, the pressure-sensitive adhesive is sprayed after UV curing, and the negative electrode is prepared through repeated operation of turning over. Swelling of the proton exchange membrane can be inhibited, dislocation of a gas diffusion layer is avoided, the attaching sealing performance of the frame membrane is improved, the flatness and uniformity of the assembly are improved, the hydrogen leakage risk is reduced, and the method is suitable for efficient green hydrogen preparation.

The utility model discloses an air-cooled hydrogen fuel cell bipolar plate, a single cell and an electric pile, and belongs to the technical field of air-cooled hydrogen fuel cells. The bipolar plate comprises a plate body, a first groove is formed in one side face of the plate body, a cathode runner is arranged in the first groove, a second groove is formed in the other side face of the plate body, an anode runner is arranged in the second groove, and an air inlet and an air outlet are formed in the two ends of the plate body respectively. And the air inlet and the air outlet are respectively communicated with two ends of the anode runner. The cathode flow channel adopts a parallel flow channel; and the anode runner adopts a snakelike runner. The anode flow channel and the cathode flow channel of the bipolar plate are both arranged in the sunken open groove, and the compression amount of the gas diffusion layer is controlled according to the depth of the open groove; according to the structure, the problem that a gas diffusion layer in a traditional membrane battery is prone to overpressure can be effectively prevented, so that the diffusion rate and uniformity of hydrogen and oxygen between the membrane electrodes are improved, and the response speed and the output performance of the single-frame membrane electrode are further improved.

The utility model relates to a fuel cell membrane electrode with high stability and high catalytic performance, which comprises a proton exchange membrane, and gas diffusion layers are arranged on two sides of the proton exchange membrane. A cathode catalyst layer is arranged between one side of the proton exchange membrane and one gas diffusion layer, an anode catalyst layer is arranged between the other side of the proton exchange membrane and the other gas diffusion layer, the cathode catalyst layer comprises n pomegranate-structured cathode layers, the anode catalyst layer comprises n pomegranate-structured anode layers, and the number n of layers is greater than or equal to 3. Compared with the prior art at the cost of sacrificing the stability, the catalytic performance is improved on the basis of considering the stability and the process influence.

The invention discloses a powder mesh composite gas diffusion layer, which is prepared by metallurgical bonding of titanium powder and a titanium mesh framework, and has the thickness of 20-100m, the porosity of 20-50%, the average pore size of 5-35m and the tensile strength of 200-500MPa. The invention also discloses a preparation method of the powder mesh composite gas diffusion layer, which comprises the following steps: step 1, tiling the titanium mesh framework and then filling with the titanium powder; a loose composite structure is formed; and 2, carrying out vacuum pressure sintering on the loose composite structure obtained in the step 1, and carrying out furnace cooling to finally obtain the powder net composite gas diffusion layer. The powder net composite gas diffusion layer disclosed by the invention has the ultrathin characteristic, the platinum plating amount can be greatly reduced, so that the cost of hydrogen production by electrolysis of water is reduced, the titanium net framework can effectively enhance the mechanical strength of the gas diffusion layer, and the problem of deformation of the diffusion layer in the assembly operation process is avoided.

The application discloses a needle coke-based gas diffusion cathode and a preparation method thereof, and the preparation method comprises the following steps: step one, taking high-conductivity needle coke powder, and performing alkali modification treatment on the needle coke powder to obtain modified needle coke; performing iron salt impregnation calcination treatment on the alkali modified needle coke to obtain iron-loaded needle coke; step two, mixing the modified needle coke and the iron-loaded needle coke with anhydrous ethanol and polytetrafluoroethylene respectively, and pressing the mixture into a gas diffusion layer and an iron-loaded needle coke catalytic layer, and then pressing the gas diffusion layer and the iron-loaded needle coke catalytic layer on both sides of a titanium mesh by using a hydraulic press to obtain a needle coke-based gas diffusion electro-Fenton cathode precursor; and step three, calcining the electrode precursor in a muffle furnace to improve the stability of the electrode precursor, and obtaining a needle coke-based gas diffusion electro-Fenton cathode. The gas diffusion electrode prepared by combining the high-conductivity and stable needle coke and PTFE can form a three-phase system on the surface of the electrode, so that the oxygen can be better contacted with the surface of the electrode, the generation efficiency of H2O2 is improved, and then the treatment effect of the electro-Fenton system on the organic matter is improved.

An electrochemical cell (100) for an electrochemical energy converter (300) wherein the cell (100) comprises:-a first gas diffusion layer (101),-a first electrode (103),-a second electrode (105),-a membrane (107) arranged between the first electrode (103) and the second electrode (105),-a second gas diffusion layer (109),-a first seal (111), and-a second seal (113), the first sealing part (111) is at least partially arranged between the first gas diffusion layer (101) and the first electrode (103), the second sealing part (113) is at least partially arranged between the second gas diffusion layer (109) and the second electrode (105), and the first sealing part (111) has an end region (115) which extends in an obliquely narrowing manner in the direction of the first electrode (103), the second seal section (113) has an end region (117) extending so as to be inclined and narrowed in the direction of the second electrode (105).

The application provides a kind of gas diffusion layer base material and its application in polymer electrolyte membrane fuel cell, the preparation of base material includes the following steps: S1, graphene oxide is added to n-hexane, nanofibrous iron-nickel alloy powder and melamine are stirred, the solution is moved to high-pressure reactor for hydrothermal reaction, calcination is carried out under inert gas atmosphere, product is obtained, the product is stirred in hydrochloric acid solution, filtration and washing are carried out, and N / C@Ni material is obtained;S2, short carbon fiber, modified polyurethane and adhesive are prepared into raw paper by dry papermaking or wet papermaking;S3, N / C@Ni material is added to anhydrous ethanol to obtain a solution, the raw paper of S2 is immersed in the solution, vacuum treatment, hot pressing, carbonization, and the target gas diffusion layer base material is obtained.The gas diffusion layer base material of the application has the characteristics of thin thickness and stable structure, can reduce the waterlogging phenomenon of fuel cell, improve the mass transfer capacity, and has good application prospect.

A method for producing methane with excellent methane selectivity is provided. [Solution] A method for producing methane using a carbon dioxide electrolysis cell including a carbon dioxide reduction electrode and an electrolyte, wherein the carbon dioxide reduction electrode has, in that order, a cathode gas diffusion layer and a cathode catalyst layer that has been treated to be water repellent, and the method includes step A of supplying carbon dioxide from the cathode gas diffusion layer side and water from the electrolyte side to the cathode catalyst layer of the carbon dioxide reduction electrode in a temperature environment exceeding 0°C and not exceeding 50°C, and applying electricity.

The invention discloses a fuel cell and application thereof, a bipolar plate of the fuel cell comprises a communication structure with a cross-flow channel and a reducing structure, the hydraulic diameter of the reducing structure is smaller than that of a non-reducing structure, the non-reducing structure of the flow channel is provided with the communication structure corresponding to at least one of two adjacent ridges, and further, the non-reducing structure of the flow channel is provided with the communication structure corresponding to at least one ridge. The resistance of the gas in the first direction passing through the reducing structure is R1, the resistance of the gas in the second direction passing through the communicating structure is R2, R1 / R2 is larger than or equal to 20, the first direction is the flowing direction when the gas enters the flow field, and the second direction is perpendicular to the first direction. According to the bipolar plate of the fuel cell, provided by the invention, a larger pressure difference can be formed between the adjacent flow channels by fully utilizing the pressure drop generated by the reducing structure, and the same or higher-level under-ridge gas convection seepage effect can be formed in a gas diffusion layer or a membrane electrode by virtue of a smaller flow field pressure drop; and the purpose of improving the under-ridge mass transfer and drainage performance of the fuel cell is achieved.

The present disclosure relates to a barrier assembly for a water electrolysis cell comprising a polymer electrolyte membrane. A water electrolysis cell includes a cathode electrode, an anode electrode, and a polymer electrolyte membrane disposed between the cathode electrode and the anode electrode. The porous transport layer is disposed adjacent the anode electrode. The gas diffusion layer is disposed adjacent to the cathode electrode. The cathode electrode, the anode electrode, and the polymer electrolyte membrane overlap in the active region. A barrier assembly includes a barrier layer including an inner edge and an outer edge defining an inner cavity. An inner edge of the barrier layer overlaps the first side of the polymer electrolyte membrane in the active region and is bonded thereto by an adhesive. An outer edge of the barrier layer surrounds the active region and extends into the inactive region.