309 results about "Perfluorosulfonic acid" patented technology

The invention is applicable to the technical field of proton exchange membranes, and particularly relates to a perfluorosulfonic acid proton exchange composite membrane which is prepared by the following steps: preparing a perfluorosulfonic acid resin solution: dissolving the perfluorosulfonic acid resin solution in a mixed solvent to form a membrane casting solution; impregnating and filling: impregnating a porous base membrane in the obtained perfluorinated sulfonic acid resin solution, and keeping at 20-80 DEG C for 1-120 minutes; drying and forming: taking out the impregnated film, and drying to form a composite film; and protonation treatment: treating the composite membrane in an acid solution, and washing to be neutral to obtain the perfluorosulfonic acid proton exchange composite membrane. According to the invention, the problems of deformation and damage of the battery in operation are effectively avoided; meanwhile, the high proton conductivity is ensured, so that the ion transmission efficiency is maintained; the introduction of the ePTFE porous skeleton enhances the membrane body and reduces the use amount of the perfluorinated sulfonic acid resin at the same time, the composite membrane is compact in structure and balanced in performance, and the durability and reliability of the fuel cell are greatly improved.

The invention discloses a PEM proton exchange membrane for water electrolysis and a preparation method thereof, and relates to the technical field of water electrolysis. The proton exchange membrane is composed of five layers of structures including a modified sulfonated composite resin layer, an enhancement layer, a water retention layer, a catalyst layer and an anti-permeation layer, the preparation method comprises the following steps: the modified sulfonated composite resin layer is prepared by dispersing perfluorinated sulfonic acid resin and sulfonated lignin in a solvent, coating and drying; the reinforcing layer is prepared by blending a PTFE (Polytetrafluoroethylene) emulsion, a carbon nanotube and a tetrafluoroethylene-hexafluoropropylene copolymer, and then carrying out casting sintering, plasma treatment and hot press molding; the water retention layer is prepared by adopting an electrostatic spinning technology; the catalyst layer is formed by spraying a precursor solution step by step and drying; the anti-permeation layer is prepared through photoetching-etching array construction, resin coating and fluorosilane modification. The prepared proton exchange membrane has excellent mechanical strength, proton conductivity and stability, and is suitable for the field of PEM water electrolysis.

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

The invention belongs to the technical field of high polymer materials, and particularly relates to a composite proton exchange membrane and a preparation method thereof. According to the prepared composite proton exchange membrane, the perfluorosulfonic acid resin capable of being industrially applied is selected as a base membrane material, and the modified polybenzimidazole polymer resin is added, so that the problem of high ion permeation rate of a perfluorosulfonic acid proton exchange membrane in the prior art is solved; interpenetration and permeation of the electrolyte in the use process of the perfluorosulfonic acid proton exchange membrane can be reduced, cross contamination of positive and negative electrolyte is greatly reduced, and the service life of the electrolyte is prolonged. The PBI is functionalized, so that the proton transmission capacity of the PBI is improved, and the proton exchange membrane formed by blending the functionalized PBI and the perfluorinated sulfonic acid resin can keep excellent vanadium resistance, excellent proton transmission capacity and relatively high ion selectivity at the same time. The preparation process is simple, and the prepared proton exchange membrane can meet the performance and long-term stability use requirements of a flow battery.

The invention provides perfluorosulfonic acid resin and a polymerization method. The polymerization method comprises the following steps: mixing perfluoromethyl vinyl ether, perfluorosulfonyl fluoride vinyl ether and a fluorine-containing solvent to obtain a mixed solution; and adding an initiator into the mixed solution, introducing a tetrafluoroethylene monomer, carrying out a copolymerization reaction, carrying out solid-liquid separation, and carrying out transformation and drying to obtain the perfluorinated sulfonic acid resin. The perfluoromethyl vinyl ether monomer is introduced into a copolymerization system, so that the rigidity of a polymer main chain is effectively reduced, and the flexibility and low-temperature mechanical strength of the resin are enhanced; the crystallinity is effectively reduced, the Tg is adjusted, and the catalyst is suitable for low-temperature proton exchange membrane fuel cells and other application scenes; the introduction of perfluoromethyl vinyl ether improves the compatibility between the main chain and the sulfonyl fluoride-containing side chain, and is beneficial to the formation of a clearer and more continuous hydrophilic / hydrophobic microphase separation structure. A stable proton conduction network is facilitated, and the electrochemical performance of the resin under harsh working conditions is remarkably improved.

The invention provides a perfluorosulfonic acid diaphragm and a preparation method and application thereof, and belongs to the technical field of battery diaphragms.The perfluorosulfonic acid diaphragm is characterized in that lithium-containing sulfonic acid polyamide is combined with PTFE and PP / PE base membranes to construct a base membrane-functional layer-protective layer three-layer structure, and the interlayer synergistic effect is achieved through the micropore filling technology; the lithium-containing sulfonic acid polyamide layer provides an ion conduction channel, PTFE fills micropores to enhance stability and wettability, the limitation that a traditional single coating is prone to stripping is broken through, and the lithium-containing sulfonic acid polyamide composite coating has the advantages of being high in ionic conductivity, good in mechanical performance, good in thermal stability and the like, is particularly suitable for solid-state batteries, lithium metal batteries and other scenes needing to absolutely obstruct dendritic crystals, and improves the safety of the batteries.

The present invention discloses a method for preparing a catalytic layer for a fuel cell, comprising the following steps: preparing a pore-forming agent solution, wherein the pore-forming agent solution comprises a perfluorosulfonic acid resin, a first solvent, and a pore-forming agent; spraying the pore-forming agent solution onto both sides of a proton exchange membrane according to a network path to form a network of protruding pore-forming agent layers; coating the pore-forming agent layer with a catalyst slurry to form a catalyst layer; and first drying at 30-50°C and then drying at 100-150°C to obtain the catalytic layer for a fuel cell. The present invention also provides a catalytic layer for a fuel cell and a fuel cell. The preparation method provided by the present invention, by pre-spraying a layer of pore-forming agent slurry, not only solves the membrane swelling problem, but also enables the catalyst layer to form regular cracks, can alleviate the volume change problem during repeated charge and discharge, and improve the durability of the fuel cell membrane electrode.

The application discloses a PEM water electrolysis hydrogen production membrane electrode and a preparation method thereof, and relates to the technical field of water electrolysis hydrogen production. The PEM water electrolysis hydrogen production membrane electrode comprises a proton exchange membrane and cathode and anode catalyst layers located on both sides of the proton exchange membrane, wherein the cathode catalyst layer and the anode catalyst layer both comprise a catalyst, a perfluorosulfonic acid ionomer, a solvent and a perfluorosulfonic acid ionomer dispersion promoter; and the perfluorosulfonic acid ionomer dispersion promoter is at least one of dimethyl sulfoxide, tetrahydrofuran and N-methyl pyrrolidone. The PEM hydrogen production membrane electrode catalyst layer prepared by the application has the dispersion promoter of the ionomer added, the dispersion degree of the ionomer in the catalyst layer is increased, a good catalyst / ionomer microporous structure catalyst layer is constructed, the transmission resistance of the gas and water is reduced, and the performance of the membrane electrode is improved. The preparation method adopted by the application does not need special treatment process and equipment, is simple and fast in operation, and is easy to realize batch production.

The invention discloses a heat-resistant stable perfluorosulfonic acid composite proton exchange membrane and a preparation method thereof, and relates to the technical field of proton exchange membranes. The perfluorosulfonic acid composite proton exchange membrane is composed of a perfluorosulfonic acid resin base membrane and a composite layer, the composite layer comprises aramid nanofiber (ANF), graphene oxide, sulfonated graphene and a core-shell structure inorganic phase (silicotungstic acid (at) SiO2), and a three-dimensional cross-linked network is formed through a gradient heat treatment process; and coating a perfluorosulfonic acid resin base membrane with the membrane casting solution, and carrying out gradient heat treatment after stepped drying to prepare the perfluorosulfonic acid composite proton exchange membrane. The perfluorosulfonic acid composite proton exchange membrane researched and developed by the invention solves the problems of mechanical strength attenuation and insufficient ion selectivity of a traditional proton exchange membrane in a high-temperature and high-humidity environment, and is suitable for energy equipment such as a fuel cell and a flow battery.

The invention discloses a negative-pressure-resistant enhanced PFA (Polyfluoroalkoxy) lining pipeline material and a manufacturing process thereof. The material comprises the following components in parts by weight: 100 parts of PFA resin, 1-10 parts of fluorinated nanofiller, 5-15 parts of perfluorinated sulfonic acid resin and 8-35 parts of an expanded polytetrafluoroethylene fiber skeleton. The material has a multi-scale reinforced structure: an expanded polytetrafluoroethylene skeleton is embedded into a PFA matrix to form a macroscopic reinforced structure, the perfluorinated sulfonic acid resin is attached to the surface of the skeleton to form an interface compatibilization layer, and the fluorinated nano filler is dispersed in the matrix to form a nano reinforced phase. The process comprises the steps of skeleton plasma activation and interface compatibilization treatment, nano filler and PFA melt blending, pressure forming, heat treatment and the like. The mechanical strength, creep resistance and negative pressure resistance of the PFA lining material are remarkably improved, and the PFA lining material is suitable for the fields of chemical engineering, pharmacy, semiconductors and the like.

The invention belongs to the field of lithium ion batteries, and particularly relates to a semi-solid lithium battery diaphragm and a preparation method thereof.The semi-solid lithium battery diaphragm comprises a base membrane and gradient functional coatings coated on the two sides of the base membrane, the base membrane is a polyimide membrane, and each gradient functional coating comprises a bonding layer on the bottom layer, a regulating layer on the surface layer and a filling layer located between the bonding layer and the regulating layer; the bonding layer comprises a component A, and the component A comprises a polymer matrix, a disulfide bond-containing cross-linking agent, a coupling agent and a first solvent; the polymer matrix comprises polyimide and polyurethane; the filling layer comprises a component B and a component A, and the component B comprises core-shell particles and a dispersing agent, wherein the core-shell particles are formed by coating Li1. 3Al0. 3Ti1. 7 (PO4) 3 particles with ZrO2; the regulation and control layer comprises perfluorinated sulfonic acid resin, a plasticizer, an interface stabilizer, a second solvent and deionized water. Through the synergistic effect of all the layers in the gradient functional coating, the self-repairing performance of a damaged interface of the diaphragm can be achieved, and the strength of the diaphragm is improved.

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

This application discloses a crown ether modified perfluorosulfonic acid resin, its preparation method, its application, and an ion exchange membrane. The main chain of the crown ether modified perfluorosulfonic acid resin is a perfluorocarbon chain. The crown ether modified perfluorosulfonic acid resin includes repeating unit A, which is shown in formula (1): Formula (1); In formula (1), R0 is a crown ether group, a is a positive integer from 0 to 6, and b is a positive integer from 2 to 5. This application can effectively improve the persistence of the ion exchange membrane's free radical quenching effect, while also improving the oxygen resistance of the ion exchange membrane.

The invention particularly discloses a preparation method and application of a composite ion exchange membrane. The composite ion exchange membrane is prepared from the following components in parts by weight: 95 to 110 parts of perfluorinated sulfonic acid resin, 5 to 8 parts of functionalized multi-walled carbon nanotubes, 10 to 15 parts of phosphotungstic acid, 1 to 1.8 parts of cerium-tannin complex, 12 to 20 parts of polyphenylene sulfide enhanced net, 30 to 40 parts of sulfonated polyether ether ketone solution, 3 to 5 parts of MXene-silicotungstic acid compound and 1 to 3 parts of polyethyleneimine cross-linking agent. The preparation method comprises the following steps: preparing the functionalized multi-walled carbon nanotube and the cerium-tannin complex; blending the perfluorinated sulfonic acid resin and the functional filler to prepare a membrane casting solution, and coating to form a membrane; a PPS reinforced net and an SPEEK solution are subjected to composite reinforcement, the PPS reinforced net and the SPEEK solution are subjected to PEI crosslinking and then superposed with the membrane, an MXene-silicotungstic acid compound is sprayed on the surface, and the composite ion exchange membrane is obtained through hot pressing and acid activation, has high proton conductivity and excellent mechanical strength and chemical stability and can be applied to a proton exchange membrane electrolytic cell and an all-vanadium redox flow battery.

The invention belongs to the technical field of silicone rubber, and particularly discloses hydrophobic conductive liquid silicone rubber and a preparation method thereof. The liquid silicone rubber comprises a component A and a component B, the component A comprises addition type liquid silicone rubber base rubber and a platinum catalyst, and the component B comprises vinyl silicone oil, hydrogen-containing silicone oil, an inhibitor, a Nafion solution and fibrous silver-coated glass powder. According to the invention, fibrous silver coated glass powder is introduced into the component B as a conductive filler, and a Nafion solution is used for surface modification of the conductive filler, so that a conductive network with high efficiency and low percolation threshold is constructed, and the interfacial compatibility of the filler and a silicone rubber matrix is also significantly improved; the perfluorosulfonic acid structure of Nafion not only enhances the interaction with the silver surface, but also endows the surface of the material with the low-energy characteristic, and synergistically realizes high conductivity and high hydrophobicity. The hydrophobic conductive liquid silicone rubber disclosed by the invention not only has excellent hydrophobicity and conductivity, but also has excellent mechanical properties.

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

The invention belongs to the technical field of high polymer materials, and particularly relates to a proton exchange membrane as well as a preparation method and application thereof, and the preparation method of the proton exchange membrane comprises the step of blending functional resin and an additive to form a membrane, the functional resin comprises one or a combination of perfluorosulfonic acid resin, polybenzimidazole resin, polyether-ether-ketone resin, polyimide resin, polyether sulfone resin and polysulfone resin; the additive is sulfonated MXene; in percentage by mass, the ratio of the functional resin is 80 to 99.9 percent, and the ratio of the additive is 0.1 to 20 percent. The proton exchange membrane prepared by the invention has low ion permeability, high proton conductivity and excellent ion selectivity and mechanical property.

The invention relates to the technical field of fuel cells, in particular to low-granularity catalyst slurry for a fuel cell and a preparation method of the low-granularity catalyst slurry. The slurry comprises the following components: a catalyst, water, an ionomer and a solvent, wherein the weight ratio of the catalyst to the water to the ionomer to the solvent is 1: (4-10): (1-4): (2-6). Through a specific ball milling dispersion method, catalyst particles can be better combined with the perfluorinated sulfonic acid resin, and the particle size of the obtained catalyst slurry is smaller.

The invention relates to a sealing material and a decoloring kettle applied to intermediate synthesis, and belongs to the technical field of composite materials. The compatilizer with a phosphoric acid structure is prepared, the compatilizer is used for treating and modifying the aluminum filler, a quaternary ammonium salt structure and a long-chain alkyl structure are introduced to the surface of the modified aluminum filler, the quaternary ammonium salt structure can generate electrostatic attraction with sulfonic acid groups in perfluorosulfonic acid resin, and the long-chain alkyl structure can generate long-chain alkyl groups in the perfluorosulfonic acid resin; the long-chain perfluoroalkyl structure can be entangled with a polytetrafluoroethylene resin molecular chain, and the two effects are synergistic, so that the binding capacity of the aluminum filler and the polytetrafluoroethylene-perfluorosulfonic acid resin composite material is effectively improved, and a polytetrafluoroethylene phase and a perfluorosulfonic acid resin phase can be bridged; the overall mechanical property of the composite material is effectively improved.

The application discloses an electronic tuning type multifunctional sensor and a preparation method thereof. The sensor comprises a quartz crystal, a composite electrode and an oscillation circuit; the first end of the composite electrode is connected with the first end of the oscillation circuit, the second end of the oscillation circuit is connected with the first end of the quartz crystal, the second end of the quartz crystal is connected with the second end of the composite electrode, and the second end of the oscillation circuit is an output end. The composite electrode comprises a substrate, a planar inductive microelectrode and a planar capacitive microelectrode which are arranged on two sides and are connected in series through a via hole; a nano-magnetic iron oxide film is deposited on the inductive side, a hydroxylated ultra-high specific surface area disordered porous carbon film is deposited on the capacitive side, and a perfluorosulfonic acid protective layer is coated on the surfaces of the two films. The application forms a frequency selection network by connecting the double-sided electrode and the quartz crystal in series, and outputs an anti-interference frequency signal; the protective layer is insulated and prevents short circuit on the inductive side, and improves the humidity response on the capacitive side; manual overturning can switch the detection of metal damage, non-metal defects and environmental humidity, and the sensor has the advantages of high stability and low cost.

The invention belongs to the technical field of ion exchange membranes, and relates to a composite membrane with a high ion selective catalytic function and a preparation method thereof. The composite membrane has a three-layer structure, namely a high-ion-selectivity base membrane doped with a microporous material and catalytic functional composite layers doped with a positive electrode catalyst and a negative electrode catalyst on two sides of the base membrane. The preparation method comprises the following steps: firstly, dissolving perfluorinated sulfonic acid resin in an organic solvent, then dividing the obtained solution into three parts, and respectively adding a microporous material, a positive electrode catalyst and a negative electrode catalyst into the three parts for dispersion; after concentration treatment, a step-by-step tape casting mode is adopted to sequentially prepare a high-ion-selectivity base membrane, a positive electrode catalytic function composite layer and a negative electrode catalytic function composite layer, and finally, the three layers are compounded to form the high-ion-selectivity catalytic function composite membrane. The prepared composite membrane endows the flow battery diaphragm with a catalytic function; through fusion of the catalyst and the diaphragm resin, the problem of catalyst shedding is solved, and the conductivity and the ion barrier ability of the diaphragm are improved at the same time.

This invention discloses an enhanced long-life proton exchange membrane for hydrogen production via water electrolysis and its preparation method. The enhanced long-life proton exchange membrane for hydrogen production via water electrolysis comprises: a reinforcing material composed of ion exchange fibers, wherein the ion exchange fibers are made of a fluoropolymer with sulfonic acid groups on the side chains; a perfluorosulfonic acid resin, which forms a film on the reinforcing material for gas barrier and proton conduction; and a free radical quencher mixed in the perfluorosulfonic acid resin to capture generated free radicals and improve membrane durability. The thickness of the proton exchange membrane is 50-100 μm. The enhanced long-life proton exchange membrane for hydrogen production via water electrolysis prepared by this invention not only has good conductivity, hydrogen permeability, tensile strength, and water content, but also exhibits better dimensional stability and superior durability.

The invention belongs to the technical field of catalysts, and provides a platinum nano oxygen reduction catalyst and a preparation method and application thereof.The preparation method of the platinum nano oxygen reduction catalyst comprises the following steps that an MOF derived carbon material is dispersed in a mixed solution of deionized water and ethyl alcohol, and a mixed solution is obtained; selecting a compound containing a platinum coordination unit with negative charge or positive charge according to positive and negative Zeta potential, stirring at room temperature, and fully adsorbing the two compounds by utilizing electrostatic acting force to obtain a reaction solution; and evaporating the reaction solution to dryness, and then carrying out a reduction reaction at 300-600 DEG C in a hydrogen reducing atmosphere to obtain the platinum nano oxygen reduction catalyst. The obtained catalyst is applied to a proton exchange membrane fuel cell, on one hand, the stability of platinum nanoparticles is improved through the micropore confinement effect, poisoning of perfluorosulfonic acid and other polymer electrolytes is avoided, on the other hand, pore channels are communicated, mass transfer is effectively enhanced, and the catalyst subjected to confinement shows excellent catalytic activity.

The invention discloses a nano cerium oxide composite proton exchange membrane and a preparation method and application thereof.The preparation method comprises the following steps that after a soluble cerium salt solution is sprayed and atomized, pyrolysis is conducted under the oxidizing atmosphere, and nano cerium oxide particles are prepared; then adding into a perfluorosulfonic acid resin solution, adjusting the pH value to be alkaline, and stirring to prepare a composite resin solution; and casting, drying to form a film, and carrying out heat treatment. Compared with the nano cerium oxide particles prepared by the traditional sol-gel method, the nano cerium oxide particles prepared by the spray pyrolysis method are more easily and uniformly dispersed in the perfluorosulfonic acid resin matrix and are not easy to agglomerate, and the basic structure of the perfluorosulfonic acid is maintained after the film is formed. Meanwhile, nano cerium oxide particles are dispersed in a perfluorosulfonic acid resin solution under an alkaline condition, so that the chemical stability and durability of the composite proton exchange membrane are improved, and the proton conductivity of the composite proton exchange membrane is improved.

The invention belongs to the technical field of batteries, and particularly relates to a composite solid electrolyte membrane, a preparation method thereof and a battery. The method comprises the following steps: mixing a perfluorosulfonic acid type polymer with an alkali metal compound, and carrying out a neutralization reaction to obtain a first mixed solution; stirring and mixing the first mixed solution and an alcohol solvent to obtain a second mixed solution; stirring and mixing the second mixed solution, a multivalent metal ion compound and metal oxide nanoparticles to form composite slurry; and coating the composite slurry on the surface of a current collector and carrying out gradient drying to obtain the composite solid electrolyte membrane. According to the method, the ionic conductivity of the solid electrolyte membrane is improved, and the coating uniformity or the membrane layer compactness is improved.

The invention discloses a multilayer perfluorosulfonic acid composite proton exchange membrane and a preparation method and application thereof, the multilayer perfluorosulfonic acid composite proton exchange membrane comprises a perfluorosulfonic acid composite membrane and two polydopamine layers, the two polydopamine layers are a first polydopamine layer and a second polydopamine layer, the first polydopamine layer and the second polydopamine layer are located on the two faces of the perfluorosulfonic acid composite membrane respectively, the perfluorosulfonic acid composite membrane comprises perfluorosulfonic acid resin and acrylamide / methacrylic acid copolymer, the first polydopamine layer comprises polydopamine, and the second polydopamine layer comprises polydopamine. Through the synergistic effect of the acrylamide / methacrylic acid copolymer, the perfluorosulfonic acid resin and the polydopamine, the multi-layer perfluorosulfonic acid composite proton exchange membrane has mechanical properties, proton conductivity, water absorption and hydrolytic stability.

The utility model discloses a perfluorosulfonic acid resin modification reaction device relates to perfluorosulfonic acid resin modification reaction technical field, including the reaction kettle, the inside of reaction kettle is provided with heating mechanism and cleaning mechanism, this device is provided with heating mechanism, when driving driving motor drives the rotation of rotating rod, and the multiple guide vane of three turntables on rotating rod will be perfluorosulfonic acid resin liquid from the bottom of guide housing to the inside of guide housing and under the action of centrifugal force and throw, so that the liquid of three guide housing bottoms and the liquid around guide housing are replaced, and the liquid of heating cylinder inside whole bottom will be replaced to the inner wall of heating cylinder by which turntable throws to the inner wall of heating cylinder, so that when driving heating wire heats the cylinder wall of heating cylinder, can improve the heating effect and heating efficiency of whole, avoid perfluorosulfonic acid resin liquid in the bottom of heating cylinder when modification reaction can not be heated fully, thereby guaranteeing the uniformity and stability of reaction.

The invention belongs to the technical field of proton exchange membranes, and relates to a proton exchange membrane for regulating and controlling a perfluorinated sulfonic acid resin / sulfonated polyether ether ketone interface by liquid crystal ionomer grafted aramid fibers as well as a preparation method and application of the proton exchange membrane. The preparation method comprises the following steps: treating aramid fiber by plasma, grafting a liquid crystal ionomer containing a sulfonic acid group to prepare a functional reinforcer, and blending modified aramid fiber and perfluorinated sulfonic acid resin / sulfonated polyether ether ketone, and casting to form the membrane. According to the technology, through three-dimensional structure optimization, a perfluorinated sulfonic acid resin continuous proton transmission channel is constructed on the mesoscale, the density of sulfonic acid groups of sulfonated polyetheretherketone is regulated and controlled on the molecular scale, and meanwhile modified aramid fiber with the surface enriched with amide groups is introduced to serve as a third-phase reinforcement body; the sulfonated polyetheretherketone and sulfonic acid groups of a two-phase matrix form a multiple hydrogen bond network, the interfacial compatibility is optimized, and the problems of low proton conductivity of sulfonated polyetheretherketone and phase separation of sulfonated polyetheretherketone from perfluorinated sulfonic acid resin are solved. The liquid crystal ionomer synergistically optimizes the proton channel continuity, and a solution is provided for the high-performance proton exchange membrane for the fuel cell.

A proton exchange membrane for an energy conversion device, a hydrogen fuel cell stack for a vehicle, and a method of forming a proton exchange membrane are provided. The proton exchange membrane includes a first layer of a perfluorosulfonic acid ionomer. In addition, the perfluorosulfonic acid ionomer includes a first methoxynonafluorobutane coated additive. The hydrogen fuel cell stack includes one or more membrane electrode assemblies, each membrane electrode assembly including a proton exchange membrane.