745 results about "Gas diffusion layer" patented technology

The present disclosure relates to a field of a fuel cell test, and in particular, to a method and an apparatus for optimizing design based on performance evaluation of a gas diffusion layer of a fuel cell. The method includes: determining an overall porosity of the gas diffusion layer of the fuel cell according to production requirements, and obtaining a plurality of porosity structures with the overall porosity; obtaining performance evaluation indexes of the gas diffusion layer of the fuel cell, and constructing a performance evaluation system for the gas diffusion layer of the fuel cell; calculating, with reference to evaluation functions and index weight ratios, performance comprehensive scores of the plurality of porosity structures in the performance evaluation system of the gas diffusion layer of the fuel cell; determining an optimal design scheme in the plurality of porosity structures according to the performance comprehensive scores.

The invention discloses a PEM electrolytic cell GDL performance test method and system based on multi-dimensional parameters. The method comprises the steps that a sensor array is used for collecting the gas transmission rate, conductive resistance and mechanical deformation data in real time when a GDL gas diffusion layer operates; preprocessing and synchronously analyzing the acquired data to generate a feature matrix with multi-dimensional performance parameters; based on the generated feature matrix, a deep reinforcement learning algorithm is adopted to dynamically adjust test conditions so as to optimize a test process; performing comprehensive scoring on test results under different working conditions by using an adaptive weighted fusion algorithm; and according to the comprehensive score and the actual working condition demand, dynamically adjusting the test process through a feedback control mechanism until the test result meets the actual working condition demand. Through the integrated sensor array module, real-time monitoring and analysis of multi-dimensional parameters are realized. The comprehensive performance of the GDL in an actual working condition environment can be comprehensively considered through the multi-dimensional parameter comprehensive evaluation capability, and a more comprehensive and accurate basis is provided for performance evaluation of the GDL.

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 thermally stable gas diffusion layer material and a fuel cell, and relates to the field of fuel cells. When the heat-stable gas diffusion layer material is prepared, short-cut polyacrylonitrile carbon fibers are subjected to papermaking and then cured, and 3-aminothiophene is oxidized and grafted to prepare a modified carbon paper base layer; the preparation method comprises the following steps: carrying out a reaction on a single-layer graphene oxide nanosheet, 6-amino-2-mercaptobenzothiazole and 3-aminoethyl thiophene to prepare a modified single-layer graphene oxide nanosheet; the preparation method comprises the following steps: reacting polyvinylidene fluoride powder, 3-allyl thiophene and single-ended vinyl silicone oil to prepare a modified polyvinylidene fluoride emulsion; and uniformly mixing the modified single-layer graphene oxide nanosheet, a modified polyvinylidene fluoride emulsion and isopropanol, spraying on the modified carbon paper base layer, and reacting with 3, 4-ethylenedioxythiophene to prepare the thermally stable gas diffusion layer material. The thermally stable gas diffusion layer material prepared by the method has excellent porosity, thermal stability, conductivity and corrosion resistance.

The invention discloses a multi-component atomic level oxide solid solution integrated electrode for electrolyzed water and a preparation method thereof, and belongs to the field of metal material surface plating. The electrode is composed of a gas diffusion layer, a nano array substrate and an atomic level oxide solid solution catalyst layer. The preparation method comprises the following steps: constructing a nano array microreactor on the surface of the gas diffusion layer; the method comprises the following steps: driving an atomic hierarchy solid solution to reconstruct by utilizing an array confinement effect through combination of precursor directional spraying and a heat treatment-rapid quenching process, and constructing a three-dimensional conformal ionomer network on the surface of the atomic hierarchy solid solution; and performing gold plating treatment on the back side of the electrode. Through the synergistic effect of spatial constraint and thermodynamic regulation of the nano microreactor, the traditional electrode interface mismatch bottleneck is broken through, and while precise construction of atomic-scale active sites is realized, the mechanical stability and oxygen evolution reaction kinetics of the electrode are improved. The preparation process has the advantages of controllable flow, strong large-scale expansibility and good industrial preparation prospect.

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.

The invention discloses a titanium fibrofelt composite material and a PEM electrolytic tank containing the titanium fibrofelt composite material, and relates to the technical field of PEM electrolytic tanks. The titanium powder mixture is filled in the titanium fibrofelt base material on one side of the second surface of the titanium fibrofelt base material, and the particle size of the first titanium powder, the particle size of the second titanium powder, the mass ratio of the first titanium powder to the second titanium powder, and the porosity and the average pore size of the titanium fibrofelt base material are controlled to be within a proper range; the titanium fibrofelt composite material has the advantages that the titanium fibrofelt base material can be well filled with the titanium powder, and a pore structure with proper pore diameter and pore diameter distribution can be formed in the titanium fibrofelt base material, so that when the titanium fibrofelt composite material is used as an anode gas diffusion layer of a PEM electrolytic tank, the cooperative transmission effect of water and oxygen is good, the mass transfer loss in the operation process of the electrolytic tank is low, and the service life of the electrolytic tank is prolonged. The internal temperature of the electrolytic tank is easy to control.

The invention discloses a gas diffusion layer with a gradient pore structure and a preparation method of the gas diffusion layer. The preparation method comprises the following steps: 1, immersing a titanium diamond net into liquid paraffin; 2, absolute ethyl alcohol, tributyl phosphate, polyvinyl butyral and two kinds of spherical titanium powder with different granularities are evenly mixed to prepare second slurry containing coarse-grained spherical titanium powder and first slurry containing fine-grained spherical titanium powder, and the second slurry and the first slurry are sequentially sprayed to the surface of the titanium rhombus net filled with paraffin; and 3, degreasing and sintering the sprayed titanium diamond net for one-step forming to obtain the gas diffusion layer with the gradient pore structure. According to the method, the slurry containing the spherical titanium powder with the coarse granularity and the spherical titanium powder with the fine granularity is sequentially sprayed on the titanium diamond net and sintered, the gas diffusion layer with the gradient hole structure is obtained, it is guaranteed that the gas diffusion layer has the high catalyst utilization rate, high mechanical strength and good gas-liquid transmission, and the structure can be adjusted according to the actual working condition so as to regulate and control the performance of the gas diffusion layer; the method is suitable for the field of PEM electrolytic hydrogen production.

The invention discloses microporous layer slurry, a microporous layer and a fuel cell, the microporous layer slurry comprises first carbon powder, second carbon powder and a mixed solvent, the mass ratio of the first carbon powder in the microporous layer slurry is 4-10%, the mass ratio of the second carbon powder in the microporous layer slurry is 2-6%, and the particle size of the first carbon powder is smaller than that of the second carbon powder; the microporous layer slurry is used for being coated on the surface of a substrate layer of the gas diffusion layer to form a microporous layer. Two kinds of carbon powder with different particle sizes are adopted, macropores can be effectively formed in the microporous layer in the process of coating the surface of the substrate layer, effective water and gas channels are established, water and gas transmission balance in the operation process of the fuel cell can be conveniently controlled, a large amount of water generated by the cathode under high power can be efficiently discharged out of the fuel cell, and the fuel cell efficiency is improved. The cathode flooding phenomenon and the anode antipole phenomenon caused by excessive water are avoided to a great extent, and the performance of the fuel cell under high current density can be improved.

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 belongs to the technical field of proton exchange membrane electrolytic cells, and particularly relates to a microporous titanium-based diffusion layer for a proton exchange membrane electrolytic cell and a preparation method of the microporous titanium-based diffusion layer. The preparation method comprises the following steps: mixing titanium powder, a binder and a solvent, coating a titanium-based substrate with the mixture, and carrying out degumming and sintering to obtain the microporous titanium-based diffusion layer for the proton exchange membrane electrolytic cell. By adopting the method disclosed by the invention, the surface structure of the gas diffusion layer of the titanium-based substrate can be optimized in batches, so that the purposes of reducing roughness, increasing the contact area with a membrane electrode, reducing contact resistance, increasing mass transfer efficiency and improving the electrochemical performance of an electrolytic tank in an electrolytic bath are achieved; the technical defects of a gas diffusion layer obtained by a preparation method in the prior art are overcome.

The invention discloses a fuel cell single cell packaging structure and a preparation method thereof, and relates to the technical field of fuel cell production.The fuel cell single cell packaging structure comprises a proton exchange membrane, catalyst layers are arranged on the upper side and the lower side of the proton exchange membrane respectively, and gas diffusion layers are arranged on the upper sides and the lower sides of the catalyst layers respectively; the outer sides of the two gas diffusion layers are respectively provided with a first thin film layer, a first hot melt adhesive layer is arranged between the two first thin film layers, the outer sides of the two first thin film layers are respectively provided with a second thin film layer, and a second hot melt adhesive layer is arranged between the adjacent first thin film layer and second thin film layer; an anode plate and a cathode plate are arranged on the outer sides of the two second thin film layers respectively, the two second thin film layers are each provided with a channel, a hot melt adhesive film layer is arranged in each channel, the sealing effect is good, and leakage is not prone to occurring.

According to the MEA electrolytic cell device and method for electrocatalytic carbon dioxide reduction, in the device, a left-end negative plate and a right-end negative plate are connected with a direct-current power source cathode; the middle anode plate is arranged in the center of the device and connected with a direct-current power anode; the multiple small electrolysis chambers are axially and symmetrically arranged on the two sides of the middle anode plate and are divided into a left group and a right group, the small electrolysis chambers in each group are connected in series in a circuit to form a left side integrated electrolysis chamber and a right side integrated electrolysis chamber, and the left side integrated electrolysis chamber and the right side integrated electrolysis chamber are electrically isolated through the middle anode plate. The electrolysis cells are connected in parallel in an external circuit to form a series-parallel cooperative circuit structure, each electrolysis cell comprises a cathode and anode composite plate, a composite plate insulating spacer, a cathode gas diffusion layer, a membrane electrode and an anode catalytic electrode, one side of each cathode and anode composite plate is a cathode surface, and the other side of each cathode and anode composite plate is an anode surface for accommodating a cathode assembly and an anode assembly respectively; and the cathode and anode composite plate is provided with a diagonal hole flow channel.

The invention discloses an air-cooled hydrogen fuel cell bipolar plate, a single cell, an electric pile and a preparation method, 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 groove, and the compression amount of the gas diffusion layer is controlled according to the depth of the 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 invention discloses an AEM electrolytic cell membrane electrode and a preparation method and application thereof, the membrane electrode comprises: an anode comprising an anode catalyst growing on a porous metal substrate in situ; the cathode comprises a cathode catalyst and a cathode diffusion layer; the anion exchange membrane is arranged between the anode catalyst and the cathode catalyst; and the cathode catalyst is loaded on the cathode side of the anion exchange membrane. The self-supporting anode is formed in an in-situ growth mode, so that the self-supporting anode has the effects of being stable in performance, good in conductivity, not prone to falling off and the like, gas diffusion is guaranteed, active sites are provided for oxidation reaction, a gas diffusion layer does not need to be considered for the anode when an electrolytic cell is assembled, and assembling is easy and convenient; the cathode catalyst is sprayed on the anion exchange membrane, and the advantages of the CCM are combined, so that the mass transfer path of the cathode is reduced, the ohmic polarization is reduced, and the electrolytic efficiency is improved.

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.

The present invention relates to the technical field of fuel cell materials, and in particular to a gas diffusion layer, a membrane electrode assembly, a fuel cell, and an electrical device. The gas diffusion layer comprises a base layer and a microporous layer disposed on the base layer, wherein the components of the microporous layer include carbon powder, a binder, and a metal oxide. The gas diffusion layer employs a metal oxide doping method to add metal oxide to the microporous layer. The gas diffusion layer is applied to a high-temperature fuel cell using a phosphoric acid-doped polymer membrane as a proton exchange membrane. As the fuel cell operates at high temperatures, phosphoric acid in the proton exchange membrane vaporizes and migrates into the gas diffusion layer, reacting with the metal oxide in the microporous layer to form phosphates. This reduces the corrosion of the carbon powder in the microporous layer by phosphoric acid, improves the gas diffusion layer's resistance to phosphoric acid corrosion and electrochemical corrosion, and increases the service life of the high-temperature fuel cell.

The present application discloses a method for manufacturing a single cell and a method for manufacturing a fuel cell. After stacking and assembling an anode plate, a first gas diffusion layer, a proton exchange membrane, a second gas diffusion layer, and a cathode plate in sequence to form a preassembled single cell, a first preset pressure is applied to both sides of the preassembled single cell to pre-compress the first gas diffusion layer and the second gas diffusion layer. This can improve the flatness of the single cell and help avoid the situation where the single cell is thick in the middle and thin around. The electrode plate can be pre-compressed to form an indentation on the gas diffusion layer, and the pre-compression amount can be maintained under the bonding action of the bonding layer, which helps reduce the displacement of the gas diffusion layer during the subsequent compression process. Therefore, the problem of different indentations formed during pre-compression and subsequent compression will not occur, which helps reduce the indentation area of ​​the gas diffusion layer and improve the water and air permeability of the gas diffusion layer.

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.

A porous titanium sheet configured to function as an anode side gas diffusion layer of a proton exchange membrane (PEM) electrolyzer is formed by a powder technique, such as tape casting or powder metallurgy.

The present invention addresses the problem of providing a fuel cell and a method for manufacturing a fuel cell in which a binder is not used when joining an electrode layer and a gas diffusion layer. In order to solve the problem, a fuel cell (1) has an electrode layer (3) and a gas diffusion layer (5) bonded to the electrode layer (3), the electrode layer (3) contains an ionomer (41), the gas diffusion layer (5) has ionomer particles (42) on at least a part of the surface facing the electrode layer (3), the ionomer particles (42) are the same as the ionomer (41) contained in the electrode layer (3), and the ionomer particles (42) are implemented by spray coating.

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