1995 results about "Membrane electrode assembly" patented technology

The invention relates to an anion exchange membrane based on isopropyl piperidone and biphenyl and a preparation method of a membrane electrode, the preparation method comprises the following steps: respectively dissolving an aromatic monomer and IPD in a first solvent, and mixing to obtain a mixed solution, the aromatic monomer being BP or TP; dropwise adding an acidic initiator into the mixed solution for reaction at the reaction temperature of-5 DEG C to 0 DEG C to obtain a nitrogen heterocyclic ring polymer intermediate; adding a quaternization reagent into the nitrogen-containing heterocyclic ring polymer intermediate to realize quaternization modification of nitrogen atoms to obtain a quaternization ionomer; and forming a film to obtain the AEM film. The preparation method of the membrane electrode comprises the following steps: respectively forming a cathode catalyst layer and an anode catalyst layer on two opposite sides of an AEM membrane through ultrasonic spraying to obtain the MEA. The AEM membrane and the MEA obtained according to the invention have the characteristics of excellent stability and high water electrolysis performance, can significantly improve the efficiency and durability of AEMWE, and are suitable for the fields of hydrogen production by water electrolysis and the like.

The invention relates to an electrode and a membrane electrode assembly for a zero-gap electrolyzer, a zero-gap electrolyzer, the use of a metal phthalocyanine, and a method for producing an electrode. An electrode (1, 1a, 1b) for a zero-gap electrolyzer (11) comprises a metal phthalocyanine (4). In this way, a particularly effective and cost-efficient catalyst can be provided.

The invention relates to a membrane electrode with high oxygen permeability and a preparation method thereof, the membrane electrode comprises a proton exchange membrane, an anode catalyst layer and a cathode catalyst layer, the anode catalyst layer and the cathode catalyst layer are arranged on two sides of the proton exchange membrane, and anode catalyst slurry comprises an anode catalyst, an ionomer and a dispersing solvent in a mass ratio of 1: (1-10): (10-1000); the cathode catalyst slurry comprises a cathode catalyst, an ionomer, an ionic liquid and a dispersing solvent in a mass ratio of 1: (1-10): (1-10): (10-1000). Compared with the prior art, in order to solve the problem that oxygen mass transfer of a porous carbon carrier in a fuel cell catalyst layer is difficult, the method that ionic liquid and ionomer are mixed in advance, then slurry is prepared, and the slurry is sprayed to prepare the membrane electrode is adopted, so that a compact structure formed by an ionomer membrane on the surface of a catalyst is weakened, and the distribution uniformity of the ionomer membrane is improved; the local oxygen mass transfer resistance is obviously reduced, and the performance of the fuel cell under high current density is improved.

The invention discloses a method for preparing a high-performance AEM water-electrolyzed hydrogen production membrane electrode, which comprises the following steps: respectively preparing an AEM water-electrolyzed hydrogen production anode and an AEM water-electrolyzed hydrogen production membrane cathode, then placing the AEM water-electrolyzed hydrogen production anode and the AEM water-electrolyzed hydrogen production cathode on two sides of an anion exchange membrane, and sealing edges to prepare the AEM water-electrolyzed hydrogen production membrane electrode, the preparation method comprises the following steps: mixing catalyst powder with a solvent to prepare catalyst prefabricated slurry, adding an anion exchange resin solution in batches, adding a hydrophobic binder to prepare catalyst slurry, coating the surface of a hydrophobic modified diffusion layer with the slurry, and finally coating the surface of the diffusion layer with the anion exchange resin solution to prepare the hydrophobic modified diffusion layer. And soaking in an organic solvent, and washing. According to the prepared AEM water electrolysis hydrogen production membrane electrode, on the basis that oxygen bubble retention can be reduced, the stability is improved, and meanwhile the activity of the membrane electrode is improved.

The invention discloses a fuel cell bipolar plate cooling flow channel optimization method, and relates to the technical field of fuel cells, and the method comprises the following steps: arranging an asymmetric micro vortex generator and a dynamic pressure compensation flow channel in the edge area of a bipolar plate cooling flow channel; the asymmetric micro-vortex generator is composed of rhombic micro-pit arrays distributed at the bottom of the flow channel. According to the fuel cell bipolar plate cooling flow channel optimization method, through collaborative design of an asymmetric micro-vortex generator and a dynamic pressure compensation flow channel, high-kinetic-energy vortex flow is directionally induced in the edge area of the bipolar plate cooling flow channel, and three-dimensional momentum redistribution is realized through section contraction acceleration and flow guide fin suction; the problems of insufficient flow power and low heat dissipation efficiency of a coolant at the edge of a traditional runner are solved, formation of a local high-temperature area at the edge of a fuel cell stack can be inhibited, the aging rate of a membrane electrode assembly is reduced, meanwhile, the spatial uniformity of electrochemical reaction and water management is guaranteed, and the output stability and the operation life of a cell are improved.

The invention relates to a membrane electrode and application thereof in deuterium-enriched water, and belongs to the field of clean energy development and utilization. The membrane electrode comprises a proton exchange membrane, an anode catalyst and a cathode catalyst, the anode catalyst is an iridium / iridium oxide catalyst with a three-dimensional porous network structure, and the cathode catalyst is a platinum-ruthenium alloy catalyst. The preparation method comprises the following steps: coating one side of the N117 proton exchange membrane with the anode catalyst, coating the other side of the N117 proton exchange membrane with the cathode catalyst, and then performing hot pressing to prepare the membrane electrode. The method comprises the following steps: assembling a membrane electrode into an electrolytic cell, and electrolyzing water by using the electrolytic cell to realize deuterium enrichment. The membrane electrode and the electrolytic cell are reasonable in design, the preparation process is simple and controllable, and the obtained product is high in efficiency and long in service life when used for enriching deuterium and facilitates industrial application.

The invention belongs to the technical field of flexible transparent film electrodes, and particularly relates to a flexible indium tin oxide film electrode, a preparation method and a flexible solar cell. According to the flexible indium tin oxide thin film electrode provided by the invention, after the processes of pre-treating substrates such as PET, covering an acrylic resin hard coating, depositing a SiO2 transition layer and the like, the adhesive force of the indium tin oxide conductive thin film is improved through the indium tin oxide conductive thin film deposited through alternate radio frequency magnetron sputtering and direct current pulse magnetron sputtering; the bottom layer deposited by radio frequency magnetron sputtering is used for providing an interface seed layer for the fluorine-doped indium tin oxide conductive thin film layer deposited by direct current pulse magnetron sputtering and having high carrier concentration and low resistance, and the top layer is used for providing protection, so that the conductivity, environmental stability and other properties of the flexible indium tin oxide thin film electrode are improved; the conductive performance is not easy to attenuate, the long-term use stability is good, and the technical problem that in the prior art, a flexible transparent film electrode is low in performance is solved.

The present application relates to the technical field of UAV power systems, and in particular to an air-cooled UAV hydrogen fuel cell control system. It includes: a spray intercooler that sprays stack wastewater as a cooling medium; a wastewater circulation system that transports stack wastewater to the spray nozzle of the spray intercooler; and a reinforcement learning control system that executes a control program to control the spray intercooler and the wastewater circulation system. The closed-loop wastewater spray cooling system significantly reduces the damage to the membrane electrode caused by the high-temperature intake air of the air compressor. At the same time, the reinforcement learning algorithm is used to achieve four-dimensional coordinated control of temperature, humidity, pressure, and flow, so that the stack always operates stably in the optimal operating range. This not only compresses the actuator response delay to the millisecond level to ensure the real-time performance of the UAV power output, but also significantly extends the service life of the stack and improves the stability of the output power while reducing the weight of the system.

The present invention relates to: a composition for modifying the surface of an electrode active material for a secondary battery, wherein the composition comprises cellulose, modified cellulose, or a mixture thereof; an electrode active material for a secondary battery, wherein the electrode active material is coated with cellulose, modified cellulose, or a mixture thereof; and a secondary battery comprising same. According to the present invention, a dry electrode can be manufactured by excluding the use of a fluorine-based binder or reducing the amount of the used fluorine-based binder, and excellent dispersibility and adhesion are achieved without using a PTFE binder conventionally used as a dry electrode binder, thereby enabling the production of a high-capacity thick film electrode.

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 application discloses a membrane electrode perforation defect and coating uniformity integrated detection device, which is characterized in that: a box body is internally fixed with a support plate, the top of the support plate is provided with a membrane electrode body, and the inside of the box body is provided with a detection mechanism; the detection mechanism comprises two detection assemblies, each detection assembly comprises two detection units, the two detection units are arranged on the top and the bottom of the support plate respectively, each detection unit comprises a support frame, one side of the support frame is connected with an insulating roller through a bearing, the other side of the support frame is provided with an inner support cylinder, and sliding square grooves are formed in the two sides of the support frame; two sliding square blocks are slidingly connected in the two sliding square grooves respectively; the application has the advantages that: the detection error caused by human factors can be avoided, the measurement range can show the real situation, the test cost is relatively low, the membrane electrode can be detected in a multi-position integrated mode, the defects such as pinholes and uneven coating of the membrane electrode can be avoided, and the problem of sample assembly in the battery operation test can be found out after the problem occurs.

The utility model discloses a safety type active water molecule electrolysis device which comprises a shell with an air flow channel, a membrane electrode assembly is arranged in the shell, the membrane electrode assembly divides the air flow channel into an air inlet end and an air outlet end, the anode side of the membrane electrode assembly faces the air inlet end, the cathode side of the membrane electrode assembly faces the air outlet end, and the air outlet end faces the air outlet end. The air inlet end is provided with a pure iron foil for air flow to pass through, the pure iron foil absorbs oxygen generated by electrolyzing water molecules on the anode side of the membrane electrode assembly, and the exhaust end is provided with an ePTFE microporous breathable protective film. Through the mode, the safe active water molecule electrolysis device and equipment can absorb oxygen in the equipment, so that the oxygen content is in a lower state, the corrosion damage of oxygen-enriched atoms is avoided, and the spontaneous combustion risk caused by over-high internal oxygen concentration is avoided.

The invention relates to the technical field of fuel cells, in particular to a single cell positioning structure and a press-fit jig and method thereof. A first positioning round hole and a first semicircular kidney-shaped hole are formed in the two ends of an anode plate; a second positioning round hole and a second semicircular kidney-shaped hole corresponding to the first positioning round hole and the first semicircular kidney-shaped hole are formed in the two ends of the membrane electrode, and the sizes of the second positioning round hole and the second semicircular kidney-shaped hole are consistent with those of the first positioning round hole and the first semicircular kidney-shaped hole respectively; a third positioning round hole and a third semicircular kidney-shaped hole which are large in size are formed in the two ends of the negative plate; when the anode plate, the membrane electrode and the cathode plate are laminated, the third positioning round hole and the third semicircular kidney-shaped hole of the cathode plate are staggered from the first positioning round hole and the first semicircular kidney-shaped hole of the anode plate in the radial direction and are physically isolated from the first positioning round hole and the first semicircular kidney-shaped hole of the anode plate. According to the structure, radial physical isolation of the anode and cathode plates in a positioning hole area is realized through aperture differences between the anode plate and the membrane electrode as well as the cathode plate, so that the short-circuit risk is fundamentally eradicated.

The invention relates to the technical field of fuel cell membrane electrode voltage distribution testing, in particular to a fuel cell membrane electrode voltage distribution testing method and system, and the method comprises the steps: arranging a potential sensor array, and synchronously collecting an original voltage vector through the potential sensor array in the loading operation process of a fuel cell; a reference electrode is arranged in the non-reaction area, a stable reference signal is applied to the reference electrode, and a feedback signal of the reference electrode is collected after preset stable time is delayed; carrying out difference calculation on the feedback signal and the stable reference signal to obtain a system measurement drift distance; and performing joint calibration on the original voltage vector according to the system measurement drift amount and the spatial continuity constraint of the membrane electrode voltage distribution to obtain the voltage distribution vector of the fuel cell membrane electrode. And the authenticity and reliability of the voltage distribution data in the long-period test process of the fuel cell are ensured by continuously compensating the drift of the measurement precision.

The invention discloses a normal-temperature and normal-pressure optical fiber chemical synthesis method and device. The core is a sandwich type optical fiber chemical membrane electrode (anode / ion exchange membrane / cathode + diffusion layer); the parallel scattering type optical fiber realizes near-uniform illumination and local enhancement on an interface. The anode uses 90-112 nm VUV to promote H dissociation, and the cathode uses 80-100 nm VUV to activate and reduce N; the direct current / pulse of the power supply is programmable. The membrane is PEM / AEM / CEM (5-200m), and an ion channel is functionally optimized through nanofiller, crosslinking and functionalization; and the catalytic surface is loaded with 1-100nm of transition metal compound and anchored. Arranging an inert / reduced-pressure sealed light path to improve VUV coupling; raw material gas H: N = 1: 1-5 (preferably 1: 3), and inert carrier gas can be added. The system is connected to online characterization and AI closed loop, ammonia is continuously produced at 0-40 DEG C and 0.8-1.2 atm, and selectivity and Faraday efficiency are improved.

The invention relates to the technical field of fuel cell membrane electrode testing, and discloses a fuel cell membrane electrode airtightness testing system and method, and the system comprises a tool clamp which comprises a cavity and a clamping assembly, the cavity is in a shell shape, and the top of the cavity is open; the clamping assembly is used for clamping a sample membrane electrode and sealing and fixing the sample membrane electrode at the top opening of the chamber; the gas supply mechanism is used for supplying helium to the inner cavity of the chamber, enabling the inner side pressure of the sample membrane electrode to be higher than the outer side pressure and forming a stable pressure difference; and the detection mechanism comprises a helium leak detector and a mechanical arm, and the mechanical arm grabs the helium leak detector to carry out global detection and smelling on the outward surface of the sample membrane electrode to find leakage points and records the leakage rate of each leakage point. According to the air tightness test system and the test method, whether the membrane electrode leaks or not can be conveniently and efficiently judged, the position of a leakage point is positioned, and the area of the leakage point is estimated.

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 application discloses an anode catalyst layer and a preparation method thereof and a membrane electrode, relates to the technical field of proton exchange membrane water electrolysis, and the anode catalyst layer is a single-layer structure and is prepared from an anode catalyst slurry after drying, the anode catalyst slurry comprises the following components in parts by weight: 0.05-10 parts of a polymer compound; 0.5-10 parts of an iridium catalyst; 0.5-12 parts of a perfluorosulfonic acid resin; and 5-120 parts of a solvent; wherein the polymer compound is used to form a reinforcing structure in the anode catalyst layer, the polymer compound comprises at least one of sodium hydroxymethyl cellulose, polyvinylidene fluoride, polyacrylic acid, polyimide or butadiene styrene rubber, and the mass of the polymer compound is 20-100% of the mass of the anode catalyst. By introducing the polymer compound, the mechanical performance and electrochemical performance of the membrane electrode can be improved.

The invention discloses a membrane electrode continuous packaging process of packaging first and then spraying. The membrane electrode continuous packaging process comprises the following steps: covering the outer side of a base material of a membrane electrode sealing frame membrane with a layer of shielding membrane; and respectively laminating the adhesive surface of the backing film with the first mask and the second mask to obtain a first laminated film. Cutting the first mask and the second mask into the sizes corresponding to the membrane electrode active region, and removing the masks in other regions to expose the adhesive part of the backing membrane; laminating the cut first laminating film with the shielding film side to obtain a second laminating film, cutting the second laminating film according to a film electrode active area, and removing wastes to obtain an upper-layer frame film and a lower-layer frame film; and respectively laminating two sides of the proton membrane with the upper and lower layer frame membrane adhesive surfaces to obtain MEA-3. And for the MEA-3, removing the first mask, the second mask and the backing films on the surfaces of the upper-layer frame and the lower-layer frame, and spraying catalyst layers on the two sides. And after spraying, removing the shielding films on the outer surfaces of the frames on the two sides to obtain the packaged film electrode.

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 discloses a membrane electrode for a low-humidity fuel cell and a preparation method of the membrane electrode. The hydrophilic nanoparticles are mixed with the catalyst slurry in an atomized state and are immediately deposited and fixed, so that the agglomeration phenomenon of the hydrophilic nanoparticles in slurry mixing and storage stages is avoided, and nano-scale uniform dispersion in a three-dimensional space of a catalyst layer is realized. By independently controlling the conveying rate of the two fluids, the loading capacity and proportion of the hydrophilic nano-particles in the final catalyst layer can be accurately and flexibly regulated and controlled. According to the present invention, the uniformly dispersed hydrophilic nanoparticles construct the efficient hydrophilic channel, such that the water balance management ability of the catalyst layer is significantly improved, and particularly under the low humidity or starting working condition, the water can be effectively stored, the proton exchange membrane can be reversely wetted, and the membrane drying can be prevented so as to improve the battery performance;

The invention relates to an oxygen evolution catalyst for hydrogen production through electrolysis of proton exchange membrane water, a membrane electrode and a preparation method of the membrane electrode, and the oxygen evolution catalyst is iridium oxide in a nanoparticle form and contains 2-2.5% of crystal water; the preparation method of the catalyst comprises the following steps: carrying out ultrasonic treatment on an iridium salt solution, mixing the iridium salt solution with magnesium sulfate and water, carrying out ultrasonic treatment, volatilizing a solvent, drying, carrying out ball milling to obtain powder, carrying out high-temperature calcination, dissolving with dilute acid, carrying out suction filtration with water and ethanol until the conductivity is less than 10 [mu] s / cm, carrying out vacuum drying to remove moisture, and grinding to obtain the catalyst. The membrane electrode comprises the catalyst powder prepared by the method and an anode catalyst layer formed by perfluorinated sulfonic acid resin; and the cathode catalyst layer is formed by Pt / C and perfluorosulfonic acid resin. The oxygen evolution catalyst provided by the invention has high activity and high stability, magnesium sulfate is adopted in the preparation method, and the oxygen evolution catalyst has the advantages of simple operation, low cost and the like.

Composite anion exchange membranes are described. The composite anion exchange membranes comprise an anion exchange polymer containing a hydrogen recombination catalyst dispersed in the anion exchange polymer. The anion exchange membrane may also include a radical scavenger. The anion exchange polymer comprises a plurality of repeating units of formula (I)Catalyst coated membranes and membrane electrode assemblies made using the composite anion exchange membranes are also described.

The invention provides a single cell structure of a fuel cell and an integrated packaging method thereof, the single cell structure of the fuel cell sequentially comprises an anode plate, one side of the anode plate deviating from a membrane electrode, namely the upper surface of the anode plate, is integrally injected with glue to form a water field sealing element, and the water field sealing element is wave-shaped and comprises a plurality of wave crests and wave troughs which are arranged in sequence; a membrane electrode and a cathode plate; and the adjacent single battery structures are connected through water field sealing pieces. The anode plate, the membrane electrode and the cathode plate respectively comprise a plurality of frames, so that the three layers of polar plates are respectively divided into a plurality of groups of chambers. The waved continuous structure of the water field sealing element provides a longer anti-leakage barrier for the cooling liquid. And the assembly pressing force is uniformly distributed at each contact point at the wave crest, so that the excessive compression of the water field sealing element and the deformation of the polar plate caused by local stress concentration are avoided, and the long-term sealing property is ensured. The multiple groups of chambers share the hydrogen inlet and the air inlet, so that the isolation space required for additionally arranging the inlets can be reduced, and the space of a power generation area is increased.

The invention provides a hydrogen evolution electrode and a preparation method thereof, a water electrolysis hydrogen production membrane electrode and an electrolytic bath, and belongs to the technical field of water electrolysis hydrogen production, the hydrogen evolution electrode comprises a substrate layer and a catalyst layer, the substrate layer comprises a first sub-layer, a second sub-layer and a third sub-layer which are arranged in a stacked mode in the first direction, the pore density of the first sub-layer is P1, the porosity is epsilon 1, the pore density of the first sub-layer is P1, the porosity of the second sub-layer is P2, the pore density of the third sub-layer is P3, the porosity of the third sub-layer is P3, P1 < P2 < P3, epsilon 1: epsilon 2: epsilon 3 = (0.9-1.1): (0.9-1.1): (0.9-1.1), the catalyst layer comprises a catalyst, and the catalyst layer is arranged on the surface of the side, provided with the third sub-layer, of the substrate layer. According to the hydrogen evolution electrode provided by the embodiment of the invention, the structural stability can be improved, the short circuit risk and contact resistance caused by piercing can be reduced, the hydrogen evolution reaction performance is ensured, and the service life is prolonged.

The invention relates to the field of fuel cell catalysts, and discloses a method for improving a membrane electrode catalyst layer of a proton exchange membrane fuel cell by using a sulfonic acid group modified carbon material, which comprises the following steps: adding a carbon material into an acid solution, carrying out reflux reaction, washing and drying to obtain a carbon material with an oxygen-containing functional group; adding the carbon material containing the oxygen functional group into an organic solvent for dispersion, adding an organic matter containing a sulfonic acid group after reaction, and performing condensation reaction to obtain a sulfonic acid group modified carbon material; and adding the sulfonic acid group modified carbon material into the proton exchange membrane fuel cell slurry to prepare the sulfonic acid group modified material improved proton exchange membrane fuel cell membrane electrode. A sulfonic acid group and water molecules form a hydrogen bond under a low-humidity working condition, so that the water retention capacity of the catalyst layer is improved, and the proton conduction capacity is improved; under the high-humidity condition, due to the ionization charge repulsion effect of sulfonic acid groups and ionomers, the adsorption of the ionomers on the surface of the carbon material is reduced, the porosity of the catalyst layer is improved, the discharge of redundant water is facilitated, and the gas transmission rate is increased.

The utility model provides a laminating device for membrane electrode packaging and a fuel cell production system, and belongs to the technical field of fuel cell manufacturing. The laminating device for membrane electrode packaging comprises a laminating assembly, a frame unwinding assembly and a driving assembly, the laminating assembly comprises a steel roller and a rubber roller which are oppositely distributed, and a gap for a membrane material to pass through is formed between the steel roller and the rubber roller; the frame unwinding assembly is located on the upstream of the steel roller and used for conveying the frame to the gap through the steel roller to be attached to the base material. The driving assembly is in driving connection with the laminating assembly, so that the steel roller and the rubber roller can be close to each other or far away from each other, and the laminating device for membrane electrode packaging can effectively solve the problems that the flatness is poor and bubbles exist after the frame and the membrane electrode are laminated.

The invention relates to a fuel cell membrane electrode assembly, a single cell and a fuel cell, the fuel cell membrane electrode assembly comprises a proton exchange membrane and a membrane electrode frame, the membrane electrode frame comprises a first frame connected to the cathode side of the proton exchange membrane, and one side, connected with the proton exchange membrane, of the first frame is further connected with a second frame; the thickness of the first frame is smaller than that of the second frame. According to the fuel cell, the first frame and the second frame are asymmetrically designed on the two sides of the proton exchange membrane, so that a space condition can be provided for increasing the flow channel depth of a cathode distribution area, the air or oxygen flow resistance on the cathode side is remarkably reduced, and the overall electrochemical reaction efficiency of the fuel cell is improved. Due to the low-density characteristic of hydrogen, the overall flow resistance of the anode is relatively small, so that the flow channel depth of the anode side distribution area is not changed or is properly reduced. And meanwhile, the first frame and the second frame form the membrane electrode frame with the double-layer structure, so that the packaging process is reduced, and the material cost and the process cost are reduced.

The invention discloses a hydrogen energy source membrane electrode GDL laminating device and method, and relates to the technical field of automobile accessory manufacturing, the hydrogen energy source membrane electrode GDL laminating device comprises a protection box, a frame laminating mechanism is arranged in the protection box, the frame laminating mechanism comprises a turnover rod arranged in the protection box, and the turnover rod is fixedly connected with a first connecting plate; and a second vacuum adsorption plate is fixedly connected to the side, away from the overturning rod, of the first connecting plate, a vacuum laminating box is fixedly connected to the interior of the protection box, a first vacuum adsorption plate is arranged on the upper portion of the vacuum laminating box, and a rolling laminating assembly is arranged in the vacuum laminating box. According to the device, the frame laminating mechanism and the GDL dispensing and laminating mechanism are integrated, the limitation that existing equipment in the market is single in function is broken through, the key steps of frame film laminating, GDL dispensing, GDL laminating and heating and pressing are sequentially completed in one piece of equipment, the production period is shortened, the production efficiency is remarkably improved, and the production cost is reduced. And the large-scale and high-efficiency production requirements of the automobile parts can be better met.