1109 results about "Membrane electrode assembly" patented technology

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 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 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 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 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 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 application discloses an air inlet end plate structure for a fuel cell stack, comprising a metal end plate and an insulating end plate, the metal end plate and the insulating end plate being a two-layer cooperating structure, one end of which is provided with an air inlet and a hydrogen outlet, and the other end of which is provided with an air outlet and a hydrogen inlet, the upper end and the lower end of which are respectively a coolant inlet and a coolant outlet; the metal end plate comprises reinforcing rib bosses, fluid inlet and outlet through holes, positioning holes and fastening holes; the insulating end plate comprises reinforcing rib grooves, fluid inlet and outlet bosses, air inlet through holes, hydrogen inlet grooves, coolant inlet grooves, air outlet through holes, hydrogen outlet grooves, coolant outlet grooves, positioning holes and sealing grooves. The application has the beneficial effect that the application sets reinforcing ribs between the metal end plate and the insulating end plate, increases the strength of the end plate structure of the fuel cell stack, reduces the deformation amount, and makes the contact pressure distribution of the bipolar plate and the membrane electrode in the stack uniform.

The invention provides a catalyst coating proton membrane and a preparation method thereof, a membrane electrode and a fuel cell, and belongs to the technical field of fuel cells, the catalyst coating proton membrane comprises a proton exchange membrane and a catalytic material coating attached to the proton exchange membrane; the preparation slurry of the catalytic material coating comprises graphene aerogel, a catalyst, perfluorinated sulfonic acid resin and a dispersing solvent; the doping amount of the graphene aerogel in the preparation slurry of the catalytic material coating is 1-3wt%. By coupling the characteristics of the graphene carbon aerogel, the catalyst and the perfluorosulfonic acid resin, the rapid dynamic response of the fuel cell to the variable load is realized, and the dynamic response problem is solved from the membrane electrode level.

The invention belongs to the technical field of chemical equipment, and discloses an electrolytic water membrane electrode and a preparation method thereof.The preparation method comprises the steps that a catalyst is electrically deposited on the surface of a substrate material, and a self-supporting electrode is obtained; preparing a first anionic membrane solution and a second anionic membrane solution by utilizing the functionalized polyaryl piperidine polymer and a polar solvent; and spraying the first anionic membrane solution on the surface of the self-supporting electrode, drying for the first time, smearing the second anionic membrane solution again by adopting the coating method, and drying for the second time to obtain the cathode side or anode side electrolytic water membrane electrode. Through an in-situ coating technology, the surface of the self-supporting electrode is directly covered with the anionic membrane solution, the surface microstructure of the self-supporting electrode is uneven, the anionic membrane solution can permeate into the pores, the anionic membrane and the electrode are tightly combined, ion transmission at the electrode / membrane interface is remarkably improved, and the self-supporting electrode is more stable in performance. Therefore, the electrolytic bath performance of the membrane electrode assembly under the condition that pure water serves as electrolyte is improved.

The invention relates to the technical field of hydrogen production by electrolyzing water, and provides a preparation method of anode catalyst slurry of PEM electrolyzed water, slurry and a catalytic layer.The preparation method comprises the steps that S1, an anode catalyst, a first ionomer and a first solvent are mixed and dispersed, and first catalyst slurry is obtained; s2, mixing and dispersing a dehydrogenation catalyst, a second ionomer and a second solvent to obtain second catalyst slurry; the dehydrogenation catalyst is a carbon-supported noble metal catalyst; and S3, mixing the first catalyst slurry and the second catalyst slurry, and carrying out homogenization treatment to obtain the anode catalyst slurry. The method has the advantages that the effects of improving uniformity, improving mass transfer and reducing hydrogen in oxygen are achieved at the same time through the cooperative arrangement of the adding of the hydrogen elimination additive, the slurry preparation process steps and the like, and the performance and the safety of the membrane electrode are improved.

The invention discloses a fuel cell bipolar plate structure with a heat dissipation fin array, and particularly relates to the field of cell bipolar plates, the fuel cell bipolar plate structure comprises a cathode plate, an anode plate is arranged on one side of the cathode plate, a membrane electrode is arranged between the cathode plate and the anode plate, an air gas cavity is arranged on the surface of one side, close to the membrane electrode, of the cathode plate, and the heat dissipation fin array is arranged in the air gas cavity. An air flow channel is formed in the inner wall of the air gas cavity, a hydrogen gas cavity is formed in the inner wall of one side of the anode plate, a hydrogen flow channel is formed in the inner wall of the hydrogen gas cavity, a cooling water flow channel is formed between the cathode plate and the anode plate, and a reinforced heat dissipation mechanism is arranged in the cooling water flow channel; the flow channel can be shortened through the flow dividing air flow channel, the path of gas from the inlet to the outlet is more average, the multi-gradient auxiliary enhanced heat dissipation effect is achieved through the enhanced heat dissipation mechanism on the inner wall of the cooling water flow channel, the enhanced heat dissipation effect can be assisted, and therefore huge heat generated by electrochemical reaction of the cathode and the anode can be taken away.

The utility model discloses a false battery module, a fuel cell and electric equipment, and relates to the technical field of batteries, the false battery module comprises a first polar plate and a second polar plate, and one side of the first polar plate is provided with a first flow channel; the first polar plate and the second polar plate are stacked in the first direction, the first flow channel and the second polar plate jointly form a first closed cavity, and the first closed cavity is used for allowing first gas to pass through. According to the false battery module provided by the invention, the risk that a worker takes a real membrane electrode as a false membrane electrode to cause a serious assembly accident can be reduced.

The invention belongs to the technical field of catalyst preparation and methanol fuel cells, and particularly relates to a Pt-based composite catalyst, a membrane electrode and a preparation method and application of the Pt-based composite catalyst and the membrane electrode. The preparation method of the Pt-based composite catalyst comprises the following steps: carrying out a hydrothermal reaction on graphene oxide, nickel salt and a nitrogen source under an alkaline condition, sequentially carrying out dipping treatment and reduction treatment on the obtained Ni (OH) 2 / NC material and a platinum source in water, mixing the obtained Pt / Ni (OH) 2 / NC material with polypyrrole and water, and carrying out ultrasonic treatment to obtain the Pt-based composite catalyst. And dispersing the obtained Pt / Ni (OH) 2-PPy / NC catalyst in a first mixed solution obtained by heating polyvinyl alcohol, glycerol, ethylene glycol, trehalose and water, and carrying out circulating freezing-unfreezing treatment to obtain the Pt-based composite catalyst. When the Pt-based composite catalyst provided by the invention is used as an anode catalyst of a membrane electrode, the low-temperature performance of a methanol fuel cell can be remarkably improved.

A proton exchange membrane for an energy conversion device, a hydrogen fuel cell stack for a vehicle, and a method for producing a proton exchange membrane. The proton exchange membrane contains a first layer of a perfluorosulfonic acid ionomer. Furthermore, the perfluorosulfonic acid ionomer contains a first additive coated with methoxy nonfluorobutane. The hydrogen fuel cell stack comprises one or more membrane electrode assemblies, each containing a proton exchange membrane.

To improve the mechanical strength of hydrocarbon-based electrolyte membranes. [Solution] An electrolyte membrane 10A comprising a porous membrane 1 and a hydrocarbon-based electrolyte polymer filled in the pores 2 of the porous membrane 1, wherein the porous membrane 1 is formed of a material containing a hydrocarbon-based resin, and the differential permeate flow rate distribution of the porous membrane 1 measured by the bubble point method has a peak in the pore diameter range of 0.01 to 1 μm.

A membrane electrode assembly for a fuel cell includes, in this order, a cathode catalyst layer, a solid polymer electrolyte membrane, and an anode catalyst layer. The cathode catalyst layer contains at least a catalyst and a highly oxygen-permeable ionomer. At least one selected from the group consisting of the cathode catalyst layer, the solid polymer electrolyte membrane, and the anode catalyst layer contains a nitrogen-containing multidentate ligand coordinatable to an iron ion.

The present invention relates to a water electrolysis electrode, a membrane electrode assembly comprising same, and an electrolysis cell comprising the membrane electrode assembly. Provided are a water electrolysis electrode, a membrane electrode assembly comprising same, and an electrolysis cell, the water electrolysis electrode comprising: a substrate; and a catalyst layer positioned on the substrate and comprising an iridium oxide and an iridium oxide-ionomer aggregate.

The present invention relates to a polymer electrolyte membrane, a method for manufacturing same, and a membrane-electrode assembly, a water electrolysis cell, and a fuel cell each comprising same. The polymer electrolyte membrane comprises, as an electrolyte, a reaction product of a cation conductor and an amine compound, wherein the cation conductor includes at least one sulfonic acid group as a side chain, and the amine compound includes at least one sulfonic acid group as a side chain and at least one amino group as a side chain, a terminal, or a combination thereof.

An object of the present invention is to provide an electrolyte membrane having an excellent joining property between an electrolyte membrane and a catalyst layer. The present invention mainly relates to an electrolyte membrane including a layer (A) containing a polymer electrolyte, and a layer (B) on at least one of the faces of the layer (A), wherein porosity (X1) in an interface region of the layer (B), on the layer (A) side, is higher than porosity (X2) in another interface region of the layer (B), on the opposite side to the layer (A).

This invention relates to the field of spectroscopic testing technology, specifically to a membrane electrode, reaction cell, spectroscopic testing device, and their applications in an in-situ spectroscopic reaction cell under operating conditions. The membrane electrode comprises a light-transmitting ion-exchange membrane and two catalyst layers in contact with opposite sides of the ion-exchange membrane. At least one catalyst layer forms the catalyst-membrane reaction observation interface at its contact surface with the ion-exchange membrane. The other catalyst layer, opposite the catalyst-membrane reaction observation interface, has a light-transmitting aperture. This design exposes the catalyst-membrane reaction observation interface, allowing scattered light reflected from the interface to be collected by a spectrometer through the aperture. This enables in-situ observation of important conformational and microenvironmental information of adsorbed molecules at the catalyst-membrane reaction observation interface, thus providing an understanding of the reaction mechanism.