2653 results about "Membrane electrode assembly" patented technology

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 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 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 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 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 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.

The invention belongs to the technical field of membrane electrodes, and particularly relates to a hydrogen fuel cell catalyst layer slurry based on hydrophilic and hydrophobic regulation and a preparation method of a membrane electrode. The slurry of the catalyst layer comprises the following contents: the slurry of the PEM close to the cathode side comprises a Pt / C catalyst, deionized water, a perfluorosulfonic acid ionic polymer solution and isopropanol; the mass ratio, namely I / C ratio, of the ionic polymer to the carbon carrier is 0.8-1.2; the GDL cathode side slurry comprises a Pt / C catalyst, deionized water, a perfluorosulfonic acid ionic polymer solution, a PTFE aqueous solution (polytetrafluoroethylene aqueous solution) and isopropanol, and the mass ratio of the ionic polymer to the carbon carrier, namely I / C ratio, is 0.3-0.5. High hydrophilic ionomer content is reserved on the side, close to the cathode, of the PEM, proton conduction and catalyst active site wetting are guaranteed, the proportion of hydrophobic ionomers and hydrophobic materials is increased on the GDL side, a drainage channel is formed, liquid water is prevented from blocking gaps, then the performance of the membrane electrode is remarkably improved, and the interface contact resistance is stabilized to be 1.64-1.76 m omega (2.5 A / cm < 2 >).

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

The invention discloses a catalyst for a high-temperature proton exchange membrane fuel cell as well as a preparation method and application of the catalyst. The catalyst of the high-temperature proton exchange membrane fuel cell comprises a carbon carrier and Pt nano-particles loaded on the carbon carrier, and at least part of the surface of the Pt nano-particles is coated with manganese dioxide. According to the catalyst of the high-temperature proton exchange membrane fuel cell, the Pt nano-particles are coated with the manganese dioxide, catalytic active sites of the catalyst can be protected after coating, the poisoning effect of phosphoric acid on the catalyst at high temperature is relieved, and the performance of the high-temperature proton fuel cell is improved. In addition, manganese dioxide not only can be used as a protective layer, but also can form a new proton conductor with phosphoric acid, so that a proton transmission channel of the membrane electrode under a high-temperature working condition is improved, and the performance of the high-temperature proton fuel cell is improved.

The invention discloses a passive thermal management system and method for a proton exchange membrane fuel cell, the passive thermal management system comprises a fuel cell stack, the fuel cell stack comprises bipolar plate end plates arranged at two ends and a cell unit serially distributed between the two groups of bipolar plate end plates, the cell unit comprises a bipolar plate and a heat pipe array plate, the bipolar plate is internally provided with a groove, the heat pipe array plate is embedded in the groove of the bipolar plate, the phase change heat storage header is arranged at the top of the fuel cell stack and comprises a water-cooling heat exchange tube bundle in conduction fit with a cell unit and a temperature sensor, the temperature uniformity in the cell is improved, and the heat pipe array plate is compact in overall structure and high in heat exchange efficiency. The space utilization rate of the stack is effectively improved, the evaporation section and the condensation section of the capillary heat pipe both have good temperature conductivity, the temperature uniformity in the fuel cell stack is improved, the heat of the fuel cell stack can be quickly recovered, and the operation environment of the membrane electrode assembly can be effectively maintained; and the water-cooling heat exchange tube bundle is combined with real-time adjustment of the control module, so that convective heat exchange is enhanced, and heat preservation and rapid cold start of the fuel cell stack can be realized.

The present application discloses a control device for controlling cold starting of a fuel cell system. The fuel cell system comprises a stack, a load and a cooling loop; the stack comprises an electrode plate and a membrane electrode assembly; and the control device comprises: a measurement module, configured to measure an initial temperature T0 of the stack; a calculation module, configured to calculate an internal temperature T of the stack on the basis of the initial temperature T0 and the output current I and the output voltage U outputted from the stack to a load; a determination module, configured to compare the calculated internal temperature T with a threshold temperature Tth; and an adjustment module, configured to, when the internal temperature T is greater than the threshold temperature Tth, increase the flow volume Qcoolant of a coolant in a cooling circuit flowing through the stack. The present application further discloses a fuel cell system comprising the control device, a control method for the fuel cell system and a computer readable storage medium. The present application can realize rapid and safe cold starting of the fuel cell system.

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

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

The invention belongs to the field of water electrolysis hydrogen production, and particularly relates to a membrane electrode and a blade coating preparation method and application thereof. The blade coating preparation method provided by the invention comprises the following steps: a) pressing a blade coating substrate to a certain thickness to obtain a pressed substrate; in the step a), the blade coating substrate is nickel foam, nickel felt or carbon paper; b) blade-coating the surface of the pressed substrate with catalyst slurry by using a blade coating machine, drying and hot-pressing to obtain a membrane electrode; in the step b), the ratio of the total mass of the catalyst powder and the binder in the catalyst slurry to the mass of the solvent is 1: (2-4); the distance between a scraper of the blade coater and the pressed substrate is 10-200 [mu] m; the blade coating speed ranges from 1 mm / s to 30 mm / s; the drying temperature is 50 to 90 DEG C. The membrane electrode is prepared by adopting a blade coating process under specific conditions, and the method has the advantages of good coating uniformity of the catalyst layer, high production efficiency and the like, and is particularly suitable for large-scale production of large-area membrane electrodes.

Methods of making an integrated electrode-separator component for a lithium-sulfur electrochemical cell are provided. A liquid dispersion comprising aramid nanofibers (ANF) is sprayed onto an active material layer comprising at least one electroactive material to form a sprayed layer that defines an integrated electrode-separator component having an interfacial resistance between the sprayed layer and the active material layer of less than or equal to about 10 Ω·cm2. An electrode-separator component and lithium-sulfur electrochemical cell are also provided.

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

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

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

The invention discloses a dimension reduction modeling method suitable for a proton exchange membrane fuel cell short stack, which is characterized in that a membrane electrode assembly is solved by adopting a one-dimensional flux equation, and a PEMFC short stack polar plate, a flow channel and a gas diffusion layer assembly are solved by adopting a three-dimensional computational domain. Comprising a mass conservation equation, a momentum conservation equation, a component conservation equation, an energy conservation equation, a liquid water equation and an electron potential conservation equation; the one-dimensional domain comprises electrochemical reaction, membrane state water, electroosmosis dragging and a flux conservation equation related to a catalytic layer and a proton exchange membrane. A three-dimensional domain calculation result is used as a one-dimensional domain boundary condition, and the one-dimensional domain calculation result is converted into a three-dimensional domain source phase and is connected with the three-dimensional domain through an expansion layer. According to the method, modeling is carried out on the PEMFC short pile, the number of grids can be reduced to one tenth of that of a traditional three-dimensional model, mass and heat transfer, electrochemical reaction, membrane water balance and other processes occurring in the PEMFC are considered, and accurate simulation can be carried out on the PEMFC pile with the activation area exceeding 300 cm < 2 > and the number of battery blocks larger than 10.

Provided is an electrolyte membrane with a catalyst layer, which is capable of suppressing a reduction in the output of a fuel cell while reducing the production cost. The present invention is a catalyst layer-equipped electrolyte membrane having a cathode catalyst layer on one surface of the electrolyte membrane and an anode catalyst layer on the other surface, the cathode catalyst layer and the anode catalyst layer each containing platinum, the electrolyte membrane has a transmittance ratio TR50 (TH50 / TO50) of hydrogen gas transmittance (TH50) to oxygen gas transmittance (TO50) at 65 DEG C and 50% RH of 3.0 or more, and satisfies the following condition 1 and / or condition 2. < Condition 1 > The ratio (CPt / APt) of the amount of platinum (CPt) per unit area of the cathode catalyst layer to the amount of platinum (APt) per unit area of the anode catalyst layer is 2.0 or more. < Condition 2 > The ratio TAn / TCa of the thickness (TCa) of the cathode catalyst layer to the thickness (TAn) of the anode catalyst layer is less than 0.40.

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

The invention provides catalyst slurry and a preparation method thereof, a membrane electrode and an electrolytic bath, and belongs to the technical field of water electrolysis hydrogen production, and the catalyst slurry comprises a catalyst, proton exchange resin, a dispersing agent and a solvent. Wherein the dispersing agent comprises at least one of polyvinylpyrrolidone, polyvinyl alcohol, polyethyleneimine, hexadecyl trimethyl ammonium bromide and hydroxyethyl cellulose. According to the catalyst slurry provided by the embodiment of the invention, sedimentation can be slowed down, the stability of the catalyst slurry is improved, the uniformity of the loading capacity of a catalyst in different membrane electrodes prepared from single-batch catalyst slurry is ensured, and the stability is improved.

A method for activating a polymer electrolyte fuel cell according to an embodiment of the present invention is adapted to activate a polymer electrolyte fuel cell a membrane electrode assembly in which an anode electrode and a cathode electrode are opposed to each other with a solid polymer membrane interposed therebetween. The method includes pressurizing and feeding a hydrogen-containing humidification gas, which has been humidified, to the anode electrode and pressurizing and feeding an oxygen-containing humidification gas, which has been humidified, or a nitrogen-containing humidification inert gas, which has been humidified, to the cathode electrode, while heating the polymer electrolyte fuel cell at a set temperature in a predetermined range (preferably from 100° C. to 300° C., more preferably from 100° C. to 200° C., and still more preferably from 100° C. to 150° C.).

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

The invention provides an electrolytic bath, an anion-exchange membrane electrode and an activation method thereof. The activation method of the anion-exchange membrane electrode comprises the following steps: introducing alkali liquor into the electrolytic bath, and introducing direct current into a to-be-activated anion-exchange membrane. In the embodiment of the invention, the anion-exchange membrane electrode to be activated is electrified in the alkali liquor environment, and the anion-exchange membrane electrode participates in the electrolysis of the solution in the electrolytic bath in the electrifying process, so that the conductivity of the anion-exchange membrane electrode is quickly improved, and the activation process of the anion-exchange membrane electrode is obviously accelerated. Moreover, the activation process can be determined by detecting the conductivity of the anion exchange membrane electrode in the activation process, so that the activation endpoint can be detected by improving the activation process, and the subsequent test is facilitated. Therefore, the technical problems that the activation process of the current anion exchange membrane electrode is slow and the activation endpoint is difficult to judge are solved.

The invention discloses a fuel cell membrane electrode pollution diagnosis method and a fuel cell membrane electrode pollution protection method. The diagnosis method comprises the following steps: applying a current of f1 frequency to the fuel cell; acquiring an impedance phase of the fuel cell based on the f1 frequency; judging whether the phase is greater than an anode pollution phase threshold; if yes, anode pollution is judged. The diagnosis method further comprises the following steps: acquiring the impedance amplitude of the fuel cell based on the f1 frequency; judging whether the amplitude is greater than a film dry amplitude threshold or not; if yes, judging that the membrane electrode is too dry. The diagnostic method further includes: applying a current at a frequency f2 to the fuel cell; acquiring the impedance amplitude of the fuel cell based on the f2 frequency; calculating an amplitude difference value according to the impedance amplitudes responding to the f2 frequency and the f1 frequency; whether the amplitude difference value is larger than a cathode pollution amplitude threshold value or not is judged; if yes, cathode pollution is judged. The diagnosis method provided by the invention can effectively distinguish electrode pollution types, has low requirements on vehicle-mounted hardware, and is easy to implement.