1017 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 belongs to the technical field of fuel cells, and particularly relates to carbon paper for a gas diffusion layer with a water-gas management function and a preparation method of the carbon paper. The carbon paper for the gas diffusion layer comprises at least three alternately stacked carbon layer structures, odd layers are macroporous carbon layers, and the macroporous carbon layers are formed by dipping carbon fiber base paper in a mixed solution of resin and a conductive material and drying the carbon fiber base paper; the even-numbered layers are small-hole carbon layers, and the small-hole carbon layers comprise resin and conductive materials and are coated on the surfaces of the odd-numbered layers; the odd-numbered layers and the even-numbered layers are compounded through a hot-pressing process to form a composite material; the composite material is subjected to high-temperature heat treatment to form a carbon paper A conductive network is formed in the carbon paper, the carbon paper with higher conductivity is prepared, part of the conductive material is filled in the carbon paper to build a microporous structure, the low-gram-weight base paper forms a macroporous structure, and the conductive material and the resin are mixed to form a microporous structure, so that the water and gas management capability is favorably improved.

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 membrane electrodes, in particular to a membrane electrode catalyst layer with a gradient aperture structure and a manufacturing method thereof.The catalyst layer is attached to the side face of a proton exchange membrane through hot pressing, and the catalyst layer at least comprises three catalyst sub-layers; the catalytic sublayer comprises ultrapure water, an organic solvent, a catalyst, a foaming agent and an ionomer; in the direction far away from the proton exchange membrane, the mass ratio of the catalyst to the foaming agent in different catalytic sub-layers is gradually reduced, and the pore diameter and the porosity in the catalytic layers are gradually increased. The membrane electrode catalyst layer provided by the embodiment of the invention can reduce the probability of'flooding 'of the gas diffusion layer (GDL) and improve the transmission performance of battery gas and reactants.

To provide a fuel battery cell that can improve durability of a membrane electrode joined body, and a method for designing a fuel battery cell.SOLUTION: A fuel battery cell comprises: a membrane electrode joined body that generates power by using reaction gas; a pair of gas diffusion layers that sandwich the membrane electrode joined body; and a pair of separators 14 that sandwich the membrane electrode joined body and the pair of gas diffusion layers. The gas diffusion layer has a Young's modulus of 1800 MPa or more and a thickness of 0.12 mm or more and 0.25 mm or less. The separator 14 has a groove 29 that has a branch part 31 and forms a channel 28 for supplying the reaction gas to the membrane electrode joined body. A value obtained by dividing the diameter D of an inscribed circle 33 of the branch part 31 in the groove 29 by a groove width W of a general part 32 other than the branch part 31 in the groove 29 is 2.5 or less.SELECTED DRAWING: Figure 3

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 gas diffusion layer reconstruction and two-phase flow model combination method considering a binder structure, which comprises the following steps of: establishing a gas diffusion layer pure fiber structure by utilizing a random reconstruction method, reconstructing the binder structure by adopting a morphological closed operation algorithm, and regulating and controlling the size of a structure operator to obtain a two-phase flow model. The effective control on the structural volume ratio and the porosity of the binder is realized. A two-phase flow model is established based on reconstruction of a gas diffusion layer with a real structure, so that the flow process of liquid water in the gas diffusion layer is solved and calculated. According to the method, the pore structure of the gas diffusion layer of the fuel cell can be reconstructed more accurately, and structural parameter changes of the gas diffusion layer caused by the existence of the binder, including changes of key parameters such as porosity, pore diameter and tortuosity, can be obtained. The characteristics of the two-phase flow process in the gas diffusion layer can be visually, rapidly and accurately obtained, the relation between the structure of the gas diffusion layer and the two-phase flow process is defined, and the structure of the gas diffusion layer is optimized.

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 relates to a proton-exchange membrane fuel cell with improved contact properties between the gas diffusion layers (GDL) and the catalyst-coated polymer-electrolyte membrane (CCM), to a gas diffusion layer, to a method for producing a gas diffusion layer, and to a method for producing a proton-exchange membrane fuel cell which exhibits an improved contact at the boundary surface between the gas diffusion layers and the catalyst-coated polymer-electrolyte membrane. The gas diffusion layer comprises a carbon fiber nonwoven material or a carbon fiber paper comprising carbon fibers which have a main orientation direction with respect to the base surface of the nonwoven material or paper, said main orientation direction not being parallel to the main orientation of the channels of an adjacent flow distributor plate.

The utility model provides a gas diffusion layer suitable for a cathode gas diffusion layer, and the gas diffusion layer is a multi-layer foam metal gas diffusion layer. The porosity of the multiple foam metal gas diffusion layers ranges from 50% to 90%. The multi-layer foam metal gas diffusion layer at least comprises a first diffusion layer and a second diffusion layer which are arranged in an overlapped mode, and the first diffusion layer is arranged close to the CCM unit. The utility model further discloses a membrane electrode structure and an air-cooled fuel cell. The gas diffusion layer provided by the utility model has more excellent thermal conductivity, is more beneficial to transfer heat generated by chemical reaction to the cathode flow channel so as to take away the heat, and is beneficial to discharge of water generated by the reaction. The air-cooled fuel cell provided by the utility model has relatively good moisture retention capability, and can effectively avoid the phenomena that the performance of the cell is reduced and the service life of the cell is quickly attenuated due to insufficient infiltration of the membrane electrode which is too dry.

The present invention relates to the field of fuel cell technology, and in particular, to a method for preparing carbon fiber paper for a fuel cell gas diffusion layer. The method comprises the following steps: adding phenolic resin, dispersant, anti-settling agent, asphalt and graphitization template agent into a mixed solvent for mixing and dispersing to obtain a resin impregnation solution; immersing carbon fiber base paper into the resin impregnation solution for impregnation, drying, and then subjecting to hot pressing curing and graphitization treatment to obtain a final product. Asphalt is used to replace part of the phenolic resin, and a graphitization template agent is introduced to reduce the graphitization temperature of the carbon fiber paper and improve the graphitization degree of the resin carbon. By optimizing the formula of the resin impregnation solution, the problem that asphalt and graphitization template agent are difficult to disperse and easy to settle in the phenolic resin impregnation solution is solved, and the asphalt, phenolic resin and graphitization template agent are loaded on the carbon paper base paper by a one-step impregnation method. The method has the advantages of simple process, low graphitization temperature and low energy consumption, and the prepared carbon fiber paper has good conductivity.

To make an adhesive less likely to spread beyond a desired application area when bonding a gas diffusion layer to an intermediate layer in the manufacturing stage of a fuel cell.SOLUTION: Using an adhesive coating system, an adhesive is applied on an intermediate layer in a manufacturing step of a fuel cell with the intermediate layer and gas diffusion layers on both sides of the intermediate layer. The adhesive application system has an application unit, a robot arm, and a controller. The application unit applies an adhesive when a valve is opened. The robot arm can move the application unit. The controller controls the valve and the robot arm. The controller linearly applies the adhesive to the intermediate layer from the application start point, by opening the valve before the application unit becomes located immediately on the application start point while moving the application unit by the robot arm.SELECTED DRAWING: Figure 3

The invention belongs to the technical field of flow batteries, and provides a flow battery system and a balancing method, and the flow battery system comprises a charging and discharging unit which comprises a negative electrode electrolyte storage tank, a first electric pile and a positive electrode electrolyte storage tank. And the composite reactor floats at the waterline position of the positive electrode electrolyte storage tank and comprises a gas diffusion layer, a second ion exchange membrane, a capillary action layer and an electrolyte transport layer which are sequentially stacked, and the gas diffusion layer is higher than the waterline position of the positive electrode electrolyte storage tank. By adopting the flow battery system with the composite reactor, the charge balance of the electrolyte can be recovered through the oxidation-reduction reaction, the electrolyte chemical reduction efficiency and the electrolyte balance efficiency of the flow battery system are improved, the positive electrode electrolyte and the negative electrode electrolyte of the flow battery can be ensured to be completely recovered to the initial state, and the service life of the flow battery is prolonged. And the power consumption and the cost for recovering the performance and the capacity of the flow battery system are greatly reduced.

The invention belongs to the technical field of fuel cells, and relates to a microporous layer with a humidity self-adjusting function and a preparation method thereof, and the microporous layer with the humidity self-adjusting function is of a hydrophilic and hydrophobic mixed structure and is arranged between a cathode catalyst layer and a cathode gas diffusion layer. Comprising a carbon material, a hydrophobic polymer and a ceramic oxide modified by a sulfonic acid group, the proton exchange membrane fuel cell adopting the microporous layer has a humidity self-adjusting function during working; the preparation method comprises the following steps: uniformly dispersing a carbon material and a ceramic oxide modified by a sulfonic acid group in ethanol and / or isopropanol to obtain a dispersion liquid, adding a water repellent agent into the dispersion liquid, uniformly mixing to obtain a microporous layer slurry, and finally coating the microporous layer slurry on the gas diffusion layer to obtain the gas diffusion layer. And drying at a constant temperature to obtain the microporous layer with the humidity self-adjusting function. With the adoption of the microporous layer, the comprehensive performance and the long-term stability of the fuel cell can be remarkably improved; the preparation method is simple.

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 relates to a high-conductivity and low-ventilation-resistance gas diffusion layer and a preparation method and application thereof. The gas diffusion layer comprises a supporting body and a microporous layer located on the surface of the supporting body, the microporous layer is formed by microporous layer slurry, and the microporous layer slurry comprises conductive filler, a wetting agent, a water repellent agent and water; the conductive filler comprises conductive carbon black AC80; the hydrophobic agent is selected from polytetrafluoroethylene and / or FEP (fluorinated ethylene propylene). The gas diffusion layer has excellent surface appearance performance and comprehensive performance such as conductivity, compression ratio and ventilation resistance.

An anode gas diffusion layer for a proton exchange membrane (PEM) electrolyzer includes a porous stainless steel sheet formed by a powder metallurgical technique.

The invention relates to a gas diffusion layer suitable for low-humidity operation and a preparation method and application thereof.The gas diffusion layer comprises a hydrophobic substrate layer and a microporous layer, the microporous layer comprises hydrophilic particles, hydrophobic particles and perfluorinated sulfonic acid resin, and the microporous layer is of a leaf vein-like bionic design structure. According to the gas diffusion layer disclosed by the invention, the microporous layer constructs an efficient gas and water transmission channel by utilizing hydrophilic particles and hydrophobic particles, and the microporous layer structure of the gas diffusion layer is subjected to'leaf vein 'bionic design, so that the gas diffusion layer has high gas transmission characteristic while having high moisture retention; the problem of poor reaction gas transmission in the membrane electrode of the proton exchange membrane fuel cell under high moisture retention is effectively solved, and high-performance stable operation of the membrane electrode of the proton exchange membrane fuel cell under low reaction gas humidification is realized.

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 belongs to the technical field of proton exchange membrane fuel cells, and particularly relates to a preparation method of microporous layer slurry, a gas diffusion layer and a membrane electrode assembly. The invention discloses a microporous layer slurry preparation method, which comprises: (1) carrying out dispersion treatment on carbon black, a solvent and a surfactant, adding a PTFE emulsion, stirring, carrying out low temperature drying, and carrying out high temperature heat treatment to obtain a PTFE and carbon black mixed powder material; the mixed powder is subjected to sanding treatment, and hydrophobic carbon black is obtained; (2) mixing hydrophobic carbon black, a solvent and a surfactant, and stirring to obtain microporous layer slurry; the microporous layer slurry prepared by the method is not easy to demulsify and good in rheological property, a microporous layer prepared by adopting the microporous layer slurry is uniform and flat, and the durability of a further obtained gas diffusion layer is enhanced.

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 utility model discloses a fuel cell gas diffusion layer water vapor transmission test fixture which comprises a first end plate and a second end plate which are matched with each other and used for clamping a gas diffusion layer, the first end plate is provided with a first inlet and a first outlet, and the second end plate is provided with a second inlet and a second outlet. A first flow channel located between the first inlet and the first outlet is arranged in the first end plate, a second flow channel located between the second inlet and the second outlet is arranged in the second end plate, the first inlet is arranged to be used for introducing first gas or liquid water, and the second inlet is arranged to be used for introducing second gas or third gas. The water vapor transmission test fixture for the gas diffusion layer of the fuel cell can meet the measurement requirements of water transmission capability and gas transmission capability of the gas diffusion layer, and is simple in structure and convenient to use.

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 discloses a methanol energy supply device for an unmanned aerial vehicle and a working method of the methanol energy supply device, and belongs to the technical field of unmanned aerial vehicle energy supply. The device mainly comprises a miniature methanol reformer and a high-temperature proton exchange membrane fuel cell (HT-PEMFC). The micro methanol reformer comprises a methanol storage tank, a vaporizing chamber, a reforming reaction chamber and a heat exchange assembly, the methanol storage tank is made of a high-strength lightweight material, the vaporizing chamber is provided with an efficient heating structure, the reforming reaction chamber is filled with a special catalyst, and the heat exchange assembly adopts an efficient heat transfer technology. A proton exchange membrane, an electrode and a gas diffusion layer of the high-temperature fuel cell are all made of special materials. During working, liquid methanol is vaporized and reformed to generate reformed gas, and hydrogen enters the fuel cell for power generation. Through the compact modular design, the device has the advantages of high energy conversion efficiency, compact and light structure, quick starting performance, strong hydrogen impurity tolerance and the like, can effectively improve the cruising ability and working performance of the unmanned aerial vehicle, and has a good application prospect in the field of unmanned aerial vehicles.