4392 results about "Membrane electrode assembly" patented technology

The invention discloses a membrane electrode heat treatment method for changing catalyst layer ionomer clusters. The membrane electrode heat treatment method comprises the following steps: 1) coating the surface of a proton exchange membrane with a catalyst; (2) carrying out heat treatment on the membrane electrode obtained in the step (1); and (3) carrying out acid treatment on the proton exchange membrane subjected to heat treatment. The invention also discloses application of the membrane electrode heat treatment method for changing the catalyst layer ionomer cluster in water electrolysis hydrogen production and fuel cells. According to the membrane electrode heat treatment method provided by the invention, the migration rates of the main chain and the side chain of the ionomer in the catalyst layer are improved to different degrees by carrying out heat treatment on the membrane electrode, so that the cluster structure of the ionomer in the catalyst layer is changed, the ohmic loss is reduced, and the overall electrolysis performance of the membrane electrode is improved; therefore, the running cost of hydrogen production by electrolysis of water and the running process of the fuel cell is reduced.

The present application provides a battery cell, a battery, and an electrical device, belonging to the field of battery technology. The battery cell includes a positive electrode sheet and an electrolyte solution. A coating mass of a positive electrode active material layer on a single side of the positive electrode sheet is 410 mg / 1540.25 mm2 to 550 mg / 1540.25 mm2, and a membrane resistance of the positive electrode sheet is ≥1Ω. A conductivity of the electrolyte solution is ≤14 mS / cm. The battery cell has thick coated electrode sheets, where the lower membrane resistance of the positive electrode sheet indicates its higher conductivity, which is conducive to reducing solid-state ohmic resistance of the battery cell. The higher conductivity of the electrolyte solution is conducive to reducing liquid-phase ohmic impedance of the battery and alleviating concentration polarization to some extent.

The invention provides a self-iteration membrane electrode assembly defect detection method, device and equipment. The method provided by the invention comprises the following steps: taking a pre-trained initial defect detection model as a current detection model, and performing defect positioning and defect type identification on a surface image of a to-be-detected membrane electrode assembly by utilizing the current detection model to obtain a detection result of the to-be-detected membrane electrode assembly; determining the detection precision of the current detection model according to the plurality of detection results; when the detection precision is smaller than a preset precision value, defect position labeling and defect type labeling are carried out on the stored surface images of the membrane electrode assembly to be detected, and the plurality of labeled surface images are determined as iterative training samples; and combining the iterative training sample and an initial training sample used for training the initial defect detection model, training the current detection model to obtain an iterative defect detection model, and carrying out defect detection. The self-iteration membrane electrode assembly defect detection method provided by the invention is used for improving the detection precision of defect detection.

The invention provides a proton exchange membrane electrode and application of the proton exchange membrane electrode in water electrolysis hydrogen production. The invention particularly relates to application of the proton exchange membrane electrode prepared by adopting a specific preparation process in water electrolysis hydrogen production. The membrane electrode used in hydrogen production by electrolysis of water adopts long-chain and short-chain perfluorinated sulfonic acid resin, has adjustable hydrophilicity, is beneficial to the generation of catalytic reaction and rapid discharge of generated gas, and improves the gas-liquid mass transfer effect of the membrane electrode; the adopted membrane electrode reduces the occupation of bubbles on the surface and improves the performance expression of the membrane electrode.

The invention belongs to the technical field of fuel cells, and particularly relates to a gradient pore cathode catalyst layer membrane electrode and a preparation method thereof.The preparation method comprises the following steps that a perfluorinated sulfonic acid resin solution is added into a water-alcohol mixed solvent to be cured, and a low-molecular-weight pore-forming agent and a high-molecular-weight pore-forming agent are added respectively; coating the cathode side of the proton exchange membrane with inner catalyst layer slurry containing a low-molecular-weight pore-forming agent to form a cathode inner catalyst layer; coating the gas diffusion layer side with outer catalyst layer slurry containing a high molecular weight pore forming agent to form a cathode outer catalyst layer; and packaging the proton exchange membrane coated with the cathode inner catalyst layer and the anode catalyst layer by using a frame, respectively adhering a gas diffusion layer coated with the cathode outer catalyst layer and an anode gas diffusion layer, performing hot pressing to prepare a membrane electrode, and removing the pore-forming agent. The pore structures of the inner and outer catalyst layers are adjusted by using pore-forming agents with different molecular weights, and the gradient pore catalyst layer is constructed, so that the oxygen transmission resistance of the membrane electrode is reduced, and the battery performance is improved.

The invention relates to the technical field of electrolytic hydrogen production, and discloses a PEM electrolytic cell energy-economy collaborative optimization method based on digital twinning, which comprises the following steps: S1, calibrating parameters of a membrane electrode mathematical model by using a standard test for a single cell of a PEM electrolytic cell, and establishing a high-precision physical simulation model; s2, constructing a high-precision digital twin system based on the high-precision physical simulation model; s3, inputting multi-dimensional data of electricity price fluctuation, hydrogen demand prediction and equipment state, and performing collaborative optimization analysis through an optimization decision algorithm; s4, forming a PEM electrolytic cell control optimization instruction; and S5, the physical entity PEM electrolytic bath executes the instruction. According to the method, the'electricity price-demand-equipment 'dynamic relation is planned as a whole from the global perspective, the process steps cover data-driven modeling, multi-target decision, digital twinning cooperation and closed-loop feedback, balance needs to be achieved among algorithm efficiency, model precision and engineering feasibility, and energy-economy-life multi-target cooperation is achieved.

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 a preparation method and application of a sandwich-structured gas diffusion electrode, and belongs to the fields of electrochemical catalysis, carbon dioxide utilization and renewable energy sources. According to the preparation method, a catalyst layer, a cation layer and a protective layer are prepared on a gas diffusion substrate in a layered manner; the catalytic layer, the cation layer and the protective layer respectively play roles in catalyzing CO2 reduction, adjusting the microenvironment, preventing cation leakage and the like. When applied, the sandwich-structured gas diffusion electrode GDE prepared by the method can be assembled on electrochemical carbon dioxide reduction modules such as a flow battery and a membrane electrode assembly (MEA) to carry out electrochemical reduction reaction of CO2, has high activity and high stability, and can avoid adding inorganic alkali metal cations into catholyte to inhibit hydrogen evolution side reaction. Based on the invention, GDE can be prepared through a microenvironment engineering means, and the performance of the electrochemical reduction reaction of carbon dioxide is improved.

The invention discloses a method for preparing a platinum-based alloy catalyst by using a plasma enhanced chemical vapor deposition low-temperature technology, relates to a preparation method of a platinum-based alloy catalyst, and aims to solve the technical problems that a carbon layer is not uniformly coated and metal particles of the catalyst are easy to agglomerate in a high-temperature calcination process in the existing platinum-based alloy catalyst prepared by carbon coating. The method comprises the following steps: 1, preparing Pt / C by a polyhydric alcohol reduction method; 2, pre-treating a Pt / C catalyst; 3, preparing M-Pt / C by a dipping evaporation method; 4, PECVD carbon shell coating is carried out; (5) alloying; and 6, removing a part of carbon shell to obtain the platinum-based alloy catalyst. When the Pt / C catalyst is used for preparing a membrane electrode of a proton exchange membrane fuel cell, the peak power density can reach 1.72-1.89 W / cm < 2 > under a hydrogen-air condition, which is improved by 20.3% and 32.2% compared with a membrane electrode of a commercial 20% Pt / C catalyst, and the Pt / C catalyst can be used in the field of proton exchange membrane fuel cells.

The invention relates to a titanium oxide nanowire supported iridium catalyst as well as a preparation method and application thereof. The catalyst comprises a titanium oxide nanowire carrier and elemental iridium supported on the titanium oxide nanowire carrier. According to the catalyst, the titanium oxide nanowire is used as a carrier, and the catalyst prepared by loading elemental iridium on the titanium oxide nanowire is used as an anode catalyst, so that higher mass specific activity and lower oxygen evolution overpotential can be obtained; the membrane electrode prepared by using the composite material has the characteristics of low noble metal catalyst loading capacity and low electrolytic water decomposition voltage.

The invention relates to membrane electrode production equipment, and belongs to the technical field of hydrogen fuel cells. The invention provides membrane electrode production equipment, which comprises an upper frame unwinding module, a lower frame unwinding module and a membrane electrode production module, the CCM cutting and transferring module is used for providing a CCM sheet material; the lower frame cutting and transferring module is used for providing a lower frame semi-cutting and transferring material belt; the thermal compounding module is used for receiving the upper frame material belt, the CCM sheet material and the lower frame half-cut transfer material belt and performing hot pressing to form a composite material belt; the finished product cutting and stripping module comprises a finished product cutting mechanism and a finished product stripping mechanism, and the finished product cutting mechanism is used for carrying out half cutting on the composite material belt to form a half-cut MEA material belt; and the finished product stripping mechanism is used for stripping the MEA sheet material from the half-cut MEA material belt and outputting the MEA sheet material. According to the membrane electrode production equipment, the membrane electrode can be automatically produced, and the qualified rate of finished products and the quality control precision are relatively high.

The invention provides a reaction system for synchronously generating ozone and hydrogen peroxide through salt-free electrolysis and an application method of the reaction system, and belongs to the technical field of electro-catalysis green synthesis. The integrated membrane electrode comprises a cathode mass transfer diffusion layer, a cathode catalyst layer, a proton exchange membrane, an anode catalyst layer and an anode mass transfer diffusion layer which are sequentially stacked, and an anode catalyst in the anode catalyst layer comprises nano tin antimony oxide and / or nano platinum black. And a cathode catalyst in the cathode catalyst layer comprises one or more of conductive carbon black, graphite, carbon nanotubes, graphene, acetylene black and activated carbon fibers. The integrated membrane electrode is large in reaction area and high in conversion efficiency, can effectively reduce mass transfer resistance, runs under high current density, and has quick response capability. The reaction system provided by the invention effectively strengthens the gas-liquid two-phase mass transfer of the cathode and the anode.

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 provides a membrane electrode, a preparation method thereof and a monocell, the membrane electrode comprises a double-cathode catalyst layer, a proton exchange membrane and a gas diffusion layer, the double-cathode catalyst layer comprises a first catalyst layer and a second catalyst layer; the first catalyst layer is connected with the proton exchange membrane, and the second catalyst layer is connected with the gas diffusion layer; the raw materials of the double-cathode catalyst layer comprise a platinum-containing catalyst and an ionomer; the particle size D50 of platinum in the first catalyst layer is smaller than the particle size D50 of platinum in the second catalyst layer. The double-cathode catalyst layer is arranged, and the particle size D50 of platinum in the first catalyst layer is smaller than the particle size D50 of platinum in the second catalyst layer, so that the utilization rate of the material is improved to the maximum extent, the cost is reduced, the performance and the overall durability of the membrane electrode are improved, and the membrane electrode has good development potential.

The invention belongs to the technical field of conductive connection, and particularly relates to an assembling mechanism for keeping combined pole pieces clamped, in particular to a pole piece assembling mechanism, an electric pile material pre-assembling device and a working method of the electric pile material pre-assembling device. Wherein the pole piece assembling mechanism is provided with an assembling plate; a rotating arm; a first lifting assembly; a second lifting assembly; the pressing frame is provided with a square opening matched with the pressing plate. And elastic anti-clamping pieces are embedded in the side walls of the pressing plates. The elastic anti-clamping piece is arranged on the side wall of the pressing plate, so that when the pressing frame is separated from the pressing plate, the elastic anti-clamping piece can automatically and dynamically adjust the levelness of the pole piece frame falling into the pressing plate, and the problem that the pole piece frame is inclined and clamped is effectively avoided; when the pressing frame and the pressing plate are pressed in a matched mode, the elastic anti-clamping piece is pressed to retract, accurate assembly of the pole piece frame and the membrane electrode is guaranteed, pole piece damage caused by rigid contact is prevented through the elastic buffering effect, and therefore the assembly yield of the galvanic pile pole piece is remarkably increased.

The invention discloses a preparation method of a gas-liquid fluctuation resistant backflow electrolyzed water microchannel, and relates to the technical field of preparation of hydrogen by electrolyzed water, the preparation method comprises the following steps: S1, selecting a polar plate of an unprocessed flow channel, and designing and processing a Tesla valve array structure comprising a Tesla island; s2, selecting a processed polar plate, and processing a micro-column array at a position close to the side wall of the Tesla structure channel; s3, respectively coating the anode side and the cathode side of the proton exchange membrane with iridium oxide and platinum carbon to prepare a catalyst layer of the membrane electrode; s4, preparing a diffusion layer, and hot-pressing the proton exchange membrane loaded with the catalyst layer and the diffusion layer together to form a membrane electrode with catalytic activity; and S5, assembling the polar plate and the membrane electrode to form the proton exchange membrane water electrolysis device with the Tesla structure and the local wettability channel. According to the invention, the phenomenon of gas-liquid backflow of the electrolytic water flow channel under large current can be effectively inhibited, and the loss of active sites caused by blockage of the flow channel by the backflow electrolytic gas is avoided.

Carbon oxide electrolyzers may be characterized by: (a) a membrane electrode assembly (MEA) comprising a cathode layer, an anode layer, and one or more polymeric electrolyte layers between and in contact with the cathode layer and the anode layer; (b) a porous transport layer (PTL) proximate the anode layer, and (c) optionally, a microporous layer (MPL) disposed between the MEA and the PTL.

The invention discloses a preparation method of a proton exchange membrane water electrolysis hydrogen production membrane electrode, which comprises the following steps: firstly, pretreating a proton exchange membrane, respectively spraying cathode and anode catalyst slurry to two sides of the treated proton exchange membrane, and drying; the method comprises the following steps: putting a proton exchange membrane into a cavity of magnetron sputtering equipment, respectively carrying out sputtering coating on two sides by utilizing a Pt target and an IrO2 target, and controlling the thickness of Pt and the thickness of IrO2; and carrying out post-treatment on the prepared membrane electrode. According to the preparation method, the efficiency of the catalyst can be improved, the catalyst layer is thinner, the dosage of the catalyst is smaller, the dosage of noble metal is reduced by 90% or above compared with that of a conventional catalyst, and the hydrogen production cost is greatly reduced.

The invention discloses a preparation method of a self-humidifying membrane electrode of a proton exchange membrane fuel cell, relates to a preparation method of a membrane electrode, and aims to solve the technical problem of poor performance of the conventional self-humidifying membrane electrode. The method comprises the following steps: 1, synthesizing a COFs material by using 2, 4, 6-triformyl phloroglucinol and 2, 5-diaminobenzene sulfonic acid through a two-phase method; 2, preparing slurry a by using a Pt / C catalyst and a perfluorosulfonic acid ionomer solution; preparing self-humidifying catalyst layer slurry b from a COFs material, a Pt / C catalyst and a perfluorosulfonic acid ionomer solution; and 3, coating the slurry a on the anode surface of the proton exchange membrane, and coating the slurry b on the cathode surface to obtain the self-humidifying membrane electrode. According to the electrode, H2 / O2 is used as fuel, and the power density is 756.3 mW / cm < 2 > under the relative humidity of 20%; h2 / air is used as fuel, the power density is 437.8-879.7 mW / cm < 2 > under the relative humidity of 50%, and the material can be applied to the field of fuel cells.

The invention belongs to the technical field of fuel cells, and particularly relates to a preparation method of a dry-method membrane electrode and the prepared dry-method membrane electrode. The preparation method of the dry-method membrane electrode comprises the following steps: firstly, dispersing carbon carrier powder in water, and then adding a perfluorosulfonic acid resin solution to disperse again; drying the obtained dispersion system, adding platinum black powder, and grinding to obtain a powder mixture; and finally, electrostatically spraying the powder mixture on two sides of the proton exchange membrane, and carrying out hot rolling to obtain the proton exchange membrane. According to the manufacturing method of the dry-process membrane electrode, the swelling deformation of the membrane when the membrane encounters a solvent is effectively avoided; and agglomeration caused by hydrophilicity and high autohension of the perfluorosulfonic acid resin powder is effectively avoided, coating of the perfluorosulfonic acid resin on the catalyst is improved, proton conduction is effectively improved, and anode transmission resistance is reduced.

The invention relates to a membrane electrode and a preparation method thereof and a PEM electrolytic bath, the membrane electrode comprises a proton exchange membrane and functional layers located on the two sides of the proton exchange membrane, each functional layer comprises a gas diffusion layer and a catalyst layer, the catalyst layer is located between the proton exchange membrane and the gas diffusion layer, and the gas diffusion layer and the catalyst layer are each of a porous structure; a conductive structure is arranged between the gas diffusion layer and the catalyst layer, and the conductive structure exists in the form of a layered structure or a dotted structure. According to the membrane electrode disclosed by the invention, the gas diffusion layer and the catalyst layer form a multi-stage porous structure, so that the membrane electrode can reduce the dosage of a catalyst under the same catalytic activity, reduce the material cost of the catalyst and enhance the binding capacity between the catalyst layer and the gas diffusion layer. The conductive structure improves the conductivity of the membrane electrode, reduces the corrosion of the gas diffusion layer in the long-time working process, and improves the bonding performance between the gas diffusion layer and the catalyst layer.

The invention discloses a fuel cell test system and method. The fuel cell test system comprises a test stack and a test analysis device, the test analysis device is connected with the test stack to detect the performance of the test stack, and the test stack comprises two end plates and more than two test single cells arranged between the two end plates. The pseudo single pools are arranged between two adjacent test single pools; and the test analysis device is respectively connected with the more than two test single cells so as to obtain performance parameters of different test single cells in the same test pile. The fuel cell test system provided by the invention can perform rapid detection and effective comparison on the performance of various test single cells, is beneficial to rapid model selection of single cell membrane electrodes, and improves the development efficiency of fuel cells.

The invention provides a membrane electrode gas diffusion layer microporous layer, a preparation method thereof and a fuel cell. Fluorine-containing organosilane and conductive polyaniline modified nano silicon dioxide microspheres are introduced into the surface of the gas diffusion layer, so that the conductivity of the microporous layer is improved; the microporous layer with good hydrophobicity and conductivity is obtained by fixing the microporous layer on a substrate layer by adopting methods of spraying, dip-coating and the like and carrying out drying and roasting treatment to generate a dense pore structure, optimize the mass point fitting property of the microporous layer and a membrane electrode catalyst and improve an interface electrochemical reaction. Compared with the prior art, the water management capability of the microporous layer is improved by adding the nano SiO2 modified by the organic fluorosilane, and meanwhile, the conductive performance of the microporous layer is improved by adding the components such as the conductive polymer and the carbon black; meanwhile, through coating, drying and roasting treatment, a micropore layer with a certain thickness and dense and uniform distribution of micropores is formed on the surface of the gas diffusion layer substrate layer, so that the interface electrochemical reaction can be improved, and the performance of the fuel cell is improved.

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 preparation method of a proton exchange membrane water electrolysis hydrogen production membrane electrode, and belongs to the technical field of proton exchange membranes, a catalyst carrier is prepared, S101, a polyimide membrane is inversely fixed in a magnetron sputtering vacuum coating chamber, a cavity cover of the magnetron sputtering vacuum coating chamber is closed, vacuumizing is performed, and a substrate is heated; and S102, argon is introduced into a cavity of the magnetron sputtering vacuum coating chamber, coating is started, the power of the bismuth metal target is set to be 0.2-0.5 kW, and the deposition time is 60-1800 s. In the invention, the physical vapor deposition method is utilized to load the catalyst on the surface of the metal oxide carrier with high specific surface area and ordered nanostructure, so that the exposure of active sites of the catalyst is increased, the dosage of the noble metal catalyst is reduced, and the bonding strength between the catalyst and the carrier is enhanced; the catalyst is not easy to separate from the surface of the carrier, and large-scale slurry agglomeration is avoided.

The invention relates to the technical field of water electrolysis hydrogen production devices, in particular to a membrane electrode for water electrolysis hydrogen production of an anion exchange membrane and a preparation method of the membrane electrode. The membrane electrode comprises an anion exchange membrane with two side surfaces, wherein a cathode catalyst layer is arranged on the first side surface of the anion exchange membrane; and / or an anode catalyst layer is arranged on the second side surface of the anion exchange membrane; the cathode catalyst layer and the anode catalyst layer are solid catalyst layers formed by coating two side surfaces of the anion exchange membrane with cathode catalyst slurry and anode catalyst slurry and curing the cathode catalyst slurry and the anode catalyst slurry respectively; the cathode catalyst slurry and the anode catalyst slurry are designed according to a specific formula. The membrane electrode has the advantages of low impedance, high catalytic activity, low swelling rate or no swelling rate, firm combination of a catalytic layer and an anion exchange membrane, simple preparation process flow and the like, is applied to an AEM electrolytic cell, and does not cause the defects of volume expansion of an electrolytic cell stack, poor sealing performance, falling of the catalytic layer and the like in the process of assembling the electrolytic cell stack; and the water electrolysis hydrogen production efficiency can be obviously improved.

The invention discloses a reactor core of an air-cooled fuel cell stack, the stack and a thermal management design method of the stack, and belongs to the technical field of fuel cells. The reactor core of the air-cooled fuel cell stack comprises a plurality of bipolar plates and a plurality of membrane electrodes which are sequentially stacked, the bipolar plate is formed by combining an anode plate and a cathode plate, a hydrogen runner is arranged on the anode surface, far away from the cathode plate, of the anode plate, and an air runner is arranged on the cathode surface, far away from the anode plate, of the cathode plate; and an air cooling runner is arranged between the anode plate and the cathode plate. The air-cooling fuel cell stack comprises the stack core, and the opening direction of the air-cooling flow channel on the stack core is opposite to the air supply direction of an air-cooling fan. By adopting the air-cooled fuel cell stack, the problems of difficulty in balancing oxygen and membrane water content, environmental sensitivity, unstable performance and the like of a cathode open type air-cooled fuel cell polar plate structure can be solved, the stack performance is improved, and the service life is prolonged.

The invention provides a self-humidifying CO2 membrane electrode structure and a preparation method thereof. The self-humidifying CO2 membrane electrode structure comprises an electrolyte isolation plate, the electrolyte isolation plate is provided with an anode side and a cathode side, the anode side is sequentially provided with a cation exchange membrane, an anode catalyst layer, a current collector and an anode electrode plate, and the cathode side is sequentially provided with an anion exchange membrane, a cathode catalyst layer and a cathode electrode plate; the anode electrode plate is provided with a first inlet, hydrogen enters the anode electrode plate from the first inlet and is subjected to a hydrogen oxidation reaction under the action of an anode catalyst to generate protons and electrons, and the protons are migrated to the electrolyte isolation plate through the cation exchange membrane; the cathode electrode plate is provided with a second inlet, CO2 gas enters the cathode electrode plate from the second inlet and is subjected to a reduction reaction under the action of a cathode catalyst to generate a reduction product and OH <->, and OH <-> is migrated to the electrolyte isolation plate through the anion exchange membrane to react with protons. The long-term operation stability of the membrane electrode structure is remarkably improved.

To provide a capacitive probe-type plasma sensor including a plasma-resistant laminate.SOLUTION: A plasma-resistant laminate 1 comprises a substrate 2, a membrane electrode 3 formed on the substrate 2, and a dielectric layer 4 formed on the membrane electrode 3. The dielectric layer 4 is a polycrystalline dielectric layer and includes columnar particles longer in a thickness direction. The membrane electrode 3 is formed of active metal, or a constituent element of the substrate or the dielectric layer, or lamination of these elements.SELECTED DRAWING: Figure 1

The present invention belongs to the field of electrochemistry, and specifically relates to an anion membrane electrode and a preparation method thereof, and a device for preparing synthesis gas by gas-phase electrolysis of carbon dioxide. The preparation method is as follows: a porous membrane protective layer is covered on the surface of a vacuum heating plate, and then an anion membrane is covered; then an anion exchange ionomer solution and a cathode catalyst anion exchange ionomer solution are sprayed on the surface in sequence. The present invention can reduce the structural damage to the anion membrane caused by the temperature fluctuation of the metal plate surface during the heating process of the vacuum heating plate by introducing a porous membrane protective layer between the anion membrane and the vacuum heating plate; the anion exchange ionomer layer is introduced between the catalyst layer and the anion membrane to increase the bonding strength between the catalyst layer and the anion membrane and increase the stability of the membrane electrode; during the volatilization process of the heating solvent, the solvent can be promoted to volatilize at low temperature by blowing dry, thereby accelerating the membrane electrode preparation process and improving the stability of the membrane electrode, thereby extending the service life of the device.