532 results about "Perfluorosulfonic acid" patented technology

The invention provides a proton exchange membrane with high proton conductivity and high durability and a preparation method thereof. The preparation method comprises the following steps: (a) mixing or / and reacting sulfonated polymer dispersion liquid and perfluorinated sulfonic acid resin dispersion liquid to obtain sulfonated polymer modified perfluorinated sulfonic acid resin membrane solution or membrane dispersion liquid; the mass ratio of the sulfonated polymer in the sulfonated polymer dispersion liquid to the perfluorinated sulfonic acid resin in the perfluorinated sulfonic acid resin dispersion liquid is (0.5-50): (50-99.5); and (b) directly forming a film from the sulfonated polymer modified perfluorosulfonic acid resin film solution or the film dispersion liquid, or coating the sulfonated polymer modified perfluorosulfonic acid resin film solution or the film dispersion liquid and a skeleton enhanced film to form the film. On the premise of ensuring high conductivity, the temperature resistance of the membrane is improved, the hydrogen permeability and swelling ratio are reduced, and the generation of free radicals is reduced, so that the durability of the membrane is indirectly improved.

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 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 belongs to the technical field of analysis and detection, and discloses a method for detecting perfluorinated and polyfluoroalkyl substances in cosmetics, which comprises the following steps: (1) mixing a perfluorinated and polyfluoroalkyl substance standard solution and an isotope internal standard solution to obtain a mixed standard solution; detecting the mixed standard solution by adopting a liquid chromatograph-mass spectrometer, drawing a standard curve, and calculating to obtain a linear equation; (2) mixing a cosmetic sample with the isotope internal standard solution, adding an extracting solution, extracting, and filtering to obtain a mixed solution to be detected; detecting the mixed to-be-detected solution by adopting the liquid chromatograph-mass spectrometer to obtain a detection result, and substituting the detection result into the linear equation to obtain the content of the perfluoro and polyfluoroalkyl substances in the mixed to-be-detected solution, the perfluoro and polyfluoroalkyl substances comprise perfluorocarboxylic acid, perfluorosulfonic acid, a fluorine polymer, perfluoroalkyl ether sulfonic acid, saturated fluorine telomere acid and perfluoroether carboxylic acid.

The invention relates to the technical field of proton exchange membranes, and provides a covalent grafted heteropoly acid modified perfluorosulfonic acid membrane as well as a preparation method and application thereof. According to the invention, polypropylene glycol monoalkyl ether and Keggin type vacancy heteropoly acid are subjected to covalent grafting, and then the obtained covalent grafted heteropoly acid is used as an additive to modify the perfluorosulfonic acid membrane, so that the leakage problem of heteropoly acid in the proton exchange membrane can be effectively relieved, and meanwhile, the excellent proton conduction performance of heteropoly acid is also retained; moreover, the polypropylene glycol monoalkyl ether has relatively large molecular weight, so that the heteropoly acid can be anchored more firmly in the perfluorosulfonic acid membrane, and the proton conduction capability of the heteropoly acid is fully exerted. The result of the embodiment shows that the covalent grafted heteropoly acid modified perfluorosulfonic acid membrane provided by the invention shows excellent proton conduction performance and chemical stability, and has a wide application prospect.

The invention relates to the field of new energy storage materials, and discloses a multifunctional composite perfluorosulfonic acid ion exchange membrane for an all-vanadium redox flow battery, and the composite membrane comprises the following components: perfluorosulfonic acid resin which accounts for 60-90wt% of the total mass of the membrane and is used as a matrix material; the functionalized multi-walled carbon nanotube accounts for 5-15 wt.% of the total mass of the membrane, and carboxyl and hydroxyl are introduced through surface treatment; phosphotungstic acid accounts for 5-20wt.% of the total mass of the membrane, and is anchored on the surface of the functionalized multi-walled carbon nanotube through an electrostatic spinning process; n, N-dimethylformamide and isopropanol are used as solvents, and the solvents are mixed with a perfluorinated sulfonic acid resin solution according to the volume ratio of 1: 1. The proton conductivity, the vanadium ion barrier property and the tensile strength of the composite membrane are obviously superior to those of a traditional Nafion membrane. According to the technical scheme, an efficient and economical solution is provided for improving the overall performance of the all-vanadium redox flow battery, and the method has good application prospects and market value.

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 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 belongs to the technical field of lithium battery positive electrode materials, and provides a method for improving the performance of lithium iron phosphate through secondary calcination of iron phosphate, and the method comprises the following steps: S1, mixing iron phosphate with a dispersant to obtain a mixture; s2, the mixture is sequentially subjected to pulping, filter pressing, drying and calcination, and a first precursor is obtained; s3, sequentially mixing, filtering and drying the first precursor and a perfluorosulfonic polymer solution to obtain a second precursor; and S4, sequentially mixing, grinding and sintering the second precursor and a lithium source to obtain the lithium iron phosphate. The compaction density of the lithium iron phosphate is larger than 2.6 g / cm < 3 >, the sphericity degree is larger than or equal to 0.8, the average particle size range is 300-500 nm, the first charge gram capacity is 160-165 mAh / g, the energy density is 110-115 mWh / g, and the rate performance 1C discharge ratio is larger than 93%.

The invention provides a preparation method of an HNT modified polymer composite membrane. The preparation method comprises the following steps: S1, preparing dealuminated HNT; s2, preparing modified HNT by using the dealuminated HNT; s3, preparing sulfonated polyether ether ketone; s4, performing ionization treatment on the sulfonated polyether ether ketone; and S5, preparing the HNT modified polymer composite membrane by using the modified HNT and the sulfonated polyetheretherketone or perfluorosulfonic acid membrane obtained in the step S4. The problems that an existing flow battery diaphragm is poor in comprehensive performance, high in cost and not suitable for various systems are solved.

The present disclosure relates to a bilayer polyelectrolyte membrane comprising a first layer and a second layer wherein the first layer comprises a perfluorosulfonic acid and the second layer comprises a cross-linked polysulfonated polymer, and wherein the first layer is disposed on the second layer. The present disclosure also relates to a method of manufacturing the bilayer polyelectrolyte membrane, and a membrane electrode assembly and a fuel cell comprising the bilayer polyelectrolyte membrane.

The invention discloses a preparation method of a nanofiber membrane capable of adsorbing various perfluorinated and polyfluoroalkyl substances, which comprises the following steps of: obtaining a nanofiber membrane spun by mixing quaternized chitosan and polyvinyl alcohol by adopting an electrostatic spinning and glutaraldehyde crosslinking method, and directly immersing the nanofiber membrane into environmental water for use; short-chain perfluorocarboxylic acid, long-chain perfluorocarboxylic acid, short-chain perfluorosulfonic acid, long-chain perfluorosulfonic acid and perfluoroalkyl ether carboxylic acid in tap water, surface water, underground water, domestic sewage, industrial sewage, agricultural sewage or medical wastewater can be efficiently and simultaneously adsorbed and removed; various types of perfluoro and polyfluoroalkyl substances such as perfluoro nonoxybenzene sulfonates and chlorinated polyfluoroether sulfonates can be selected from various types of perfluoro and polyfluoroalkyl substances. And after adsorption removal is completed, taking out the wastewater from the environmental water to complete solid-liquid separation. Compared with an existing adsorbent, the adsorbent has the advantages that more types of perfluorinated and polyfluoroalkyl substances can be adsorbed and removed at the same time, the adsorption and removal efficiency on short-chain perfluorinated substances is higher, and the applicable environment water matrix is wider.

The invention relates to the technical field of fuel cells, in particular to proton exchange membrane fuel cell slurry and a preparation method thereof. The preparation method comprises the following steps: (1) adding a perfluorosulfonic acid resin solution into alcohol, dispersing, and heating to obtain a gelatinized ionomer solution; (2) adding water or alcohol into a catalyst, and dispersing to obtain a catalyst solution; and (3) mixing the gelatinized ionomer solution and the catalyst solution, and uniformly dispersing to obtain the proton exchange membrane fuel cell slurry. The catalyst has the advantages of excellent power generation performance and uniform coating on the surface of the catalyst.

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 triangular runners are arranged on the inner sides of an anode plate and a cathode plate of the PEM electrolytic bath, the vertex angle is 30-90 degrees (preferably 45-60 degrees), the depth of each runner is 0.5-5 mm, the width of each runner is 0.5-5 mm, the interval of each runner is 1-10 mm, and the triangular runners can be arranged in parallel, staggered and the like. The anode plate and the cathode plate can be made of metal (such as stainless steel and titanium alloy) or graphite materials, and cooling channels can be arranged outside the anode plate and the cathode plate. The membrane electrode assembly comprises a proton exchange membrane (such as a perfluorosulfonic acid membrane), an anode catalyst layer (such as iridium dioxide) and a cathode catalyst layer (such as platinum or platinum alloy). According to the electrolytic cell, fluid disturbance is increased, gas discharge is improved, membrane electrode hydrogen attachment is effectively reduced, proton conduction and electrode reaction activity are improved, and compared with a traditional electrolytic cell, under the same condition, the current density, the hydrogen production efficiency and the hydrogen purity are higher, energy consumption and cost are lower, and good application prospects and economic benefits are achieved.

The invention provides catalyst slurry as well as a preparation method and application thereof. The method comprises the following steps: premixing a first ionomer solution and a catalyst, and adding a first solvent into the system for first mixing to form first slurry; performing second mixing on the first slurry, a second ionomer solution and a second solvent to form second slurry; performing high-pressure nano-dispersion on the second slurry to obtain catalyst slurry; wherein the first ionomer solution is prepared from the following components in percentage by weight: 5 to 30 percent of perfluorinated sulfonic acid resin and 70 to 95 percent of water; the second ionomer solution is prepared from the following components in percentage by weight: 5 to 30 percent of perfluorinated sulfonic acid resin, 10 to 70 percent of alcohol solvent and 0 to 50 percent of water. On the basis, the catalyst slurry is better in stability, and the membrane electrode performance is better.

The invention discloses membrane electrode catalyst layer slurry, a preparation method thereof and application of the membrane electrode catalyst layer slurry in preparation of a proton exchange membrane fuel cell, and relates to a membrane electrode material. The catalyst layer slurry comprises a resin dispersion liquid and a catalyst pre-dispersion suspension liquid; the resin dispersion liquid comprises alkali metal ions and a perfluorinated sulfonic acid resin film solution, the molar ratio of-SO3H in the alkali metal ions and perfluorinated sulfonic acid resin powder is larger than or equal to 0.05 and smaller than 0.3, and the alkali metal ions are Cs < + > and / or Rb < + >. A small amount of alkali metal ions with large ion radius are added into the catalyst layer slurry, so that self-agglomeration among perfluorosulfonic acid resin molecules is effectively blocked, more catalyst-perfluorosulfonic acid resin interfaces are generated, the particle size of the catalyst slurry is effectively reduced, the content of free perfluorosulfonic acid resin is reduced, and the service life of the catalyst slurry is prolonged. The uniformity of the catalyst slurry is remarkably improved, and on a catalyst layer of the CCM, the roughness is reduced, large particles on the surface are reduced, and the performance of a membrane electrode is improved.

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

The invention discloses an inorganic-organic composite solid electrolyte as well as a preparation method and application thereof, and relates to the technical field of electrolytes. The inorganic-organic composite solid electrolyte comprises a polymer matrix, a filler and a lithium salt, wherein the polymer matrix is lithium perfluorosulfonate, the filler is lithium lanthanum zirconium oxide, and the lithium salt is LiTFSI. The inorganic-organic composite solid electrolyte is high in ionic conductivity, good in stability and capable of inhibiting growth of lithium dendrites, an electrochemical window can reach 4.6 V or above, and the inorganic-organic composite solid electrolyte can adapt to most of electrode materials in the market and is suitable for preparing batteries, especially lithium batteries. The obtained battery has excellent electrochemical stability, lithium stability, cycling stability, ion migration performance and rate capability, and can be applied to the field of new energy automobiles.

The invention belongs to the field of high polymer materials, and relates to a long and short branch chain type perfluorosulfonic acid resin, a proton membrane and a preparation method and application thereof, the resin structure has long branch chain perfluorosulfonic acid and short branch chain perfluorosulfonic acid structural units, and the structural advantages of the perfluorosulfonic acid resin are retained. Due to the introduction of a long-chain-chain perfluorosulfonic acid structure, the water absorption of the resin and the film can be regulated and controlled, and the dimensional stability is improved; besides, the cationic group in the structure can effectively improve the dissociation of the terminal sulfonic acid group, improve the ionic conductivity of the proton membrane, and solve the contradiction between long side chain and low conductivity. A sulfonic acid group in a short-branch-chain perfluorosulfonic acid structure and an amino group (-N) in a long-branch-chain perfluorosulfonic acid structure can form an acid-base ion pair, so that the strong water absorption effect of the sulfonic acid group in the proton membrane is effectively limited, and the mechanical property of the membrane can be greatly enhanced; in addition, formed ion pairs can also be used for ion conduction, so that the contradiction between'short side chain 'and'high swelling' is solved.

The invention belongs to the field of proton exchange membrane fuel cells, and particularly relates to a preparation method of a perfluorinated sulfonic acid resin dispersion liquid, which comprises the following steps: S1, blending water, alcohol and a third solvent according to a ratio, and uniformly stirring at room temperature to obtain a blended solvent; s2, adding the perfluorinated sulfonic acid resin into the blending solvent, and stirring to obtain the perfluorinated sulfonic acid resin dispersion liquid. Compared with the prior art, the problems that in the prior art, the preparation process is complex, and the prepared dispersion liquid is high in viscosity are solved; the preparation can be completed at normal temperature and normal pressure, and the prepared perfluorinated sulfonic acid resin dispersion liquid is relatively low in viscosity and convenient to further process and form a film.

The invention relates to a low-hydrogen-permeation PEM electrolyzed water membrane electrode and a preparation method thereof.The low-hydrogen-permeation PEM electrolyzed water membrane electrode sequentially comprises an anode catalyst layer, an insulating layer, a hydrogen elimination layer, a proton exchange membrane and a cathode catalyst layer from top to bottom, and the insulating layer is prepared from perfluorinated sulfonic acid resin. The insulating layer is added between the hydrogen elimination layer and the anode catalyst layer of a traditional hydrogen elimination membrane electrode, on one hand, the insulating layer can efficiently transfer protons, and the electrolysis performance of the membrane electrode is not affected; on the other hand, the insulating layer cannot conduct electrons, the dehydrogenation layer is isolated from a high-potential working environment, the dehydrogenation catalyst is prevented from being oxidized and inactivated, and the dehydrogenation stability of the membrane electrode is ensured.

The invention provides a composite proton exchange membrane as well as a preparation method and application thereof. The composite proton exchange membrane comprises a polymer porous supporting layer and perfluorinated sulfonic acid resin layers arranged on the surfaces of the two sides of the polymer porous supporting layer. The perfluorosulfonic acid resin layer contains a functional additive, the functional additive comprises a metal oxide-loaded three-dimensional self-supporting material, and the three-dimensional self-supporting material is composed of sulfonated graphene and carbon nanotubes. The functional additive is introduced into the perfluorinated sulfonic acid resin layer, sulfonated graphene with good conductivity and water solubility enables the composite proton exchange membrane to show extremely high functional density in the use process of a battery, and the mechanical strength of the composite proton exchange membrane is improved by introducing the carbon nanotubes with good conductivity and water solubility; and the introduction of the metal oxide prolongs the service life of the composite proton exchange membrane. Therefore, by introducing the functional additive, the electrical property and the service life of the composite proton exchange membrane are remarkably improved, and the composite proton exchange membrane has a good development prospect.

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 relates to a catalyst layer slurry, the catalyst layer slurry comprises a platinum carbon catalyst, perfluorosulfonic acid resin, a hydrophobic modifier, an alcohol solvent and deionized water, and the hydrophobic modifier is carbon powder with a hydrophobic coating layer. The catalyst slurry provided by the embodiment of the invention comprises the hydrophobic modifier, the hydrophobic catalyst is carbon powder with a hydrophobic coating layer, the catalyst layer is formed through the catalyst slurry, and the carbon powder with the hydrophobic coating layer is used for constructing gas and liquid water channels in the catalyst slurry, so that the water logging phenomenon is prevented.

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 discloses a cathode catalyst layer and a preparation method thereof, a membrane electrode and a fuel cell, the cathode catalyst layer is arranged on the cathode side of a proton exchange membrane of the membrane electrode, and the method comprises the following steps: providing a material and a solution; the solution comprises water and a high-boiling-point solvent; the boiling point of the high-boiling-point solvent is higher than that of water; the materials comprise a catalyst and perfluorinated sulfonic acid resin; uniformly mixing the materials and the solution to obtain target slurry; coating the target slurry on the cathode side to obtain an initial cathode catalyst layer; and carrying out heat treatment on the initial cathode catalyst layer to obtain the cathode catalyst layer. According to the method, the high-boiling-point solvent and the water are combined to serve as the solution, and the problem that the porous structure of the cathode catalyst layer is non-uniform due to volatilization of the solution of the target slurry at normal temperature in the coating process is solved.

To provide ion liquid having coating characteristics of high conversion efficiency and high durability even if an FC stack of a large-sized vehicle is used in place of a perfluorosulfonic acid-based cation exchange membrane which is a coating material of a cathode electrode catalyst (catalyst Pt:102, electrode C:103).SOLUTION: Provided is an electrode catalyst coated with phosphonium type ion liquid 103 expressed by the following chemical formula 1: P+(C8H17)3R1X- . In the chemical formula 1, C8H17 is a straight-chain octyl group, R1 is a 1-18C straight chain or branched-chain alkyl group or a 1-18C alicyclic alkyl group, and X- is an anion component.SELECTED DRAWING: Figure 1

The invention relates to a double-membrane three-chamber electrolysis method for extracting high-purity manganese and simultaneously generating oxygen in a chlorine salt system, and belongs to the technical field of hydrometallurgy. An anion exchange membrane and a cation exchange membrane are adopted to divide an electrolytic cell into a cathode chamber, a middle chamber and an anode chamber, a double-membrane three-chamber electrolytic cell is formed, an electrolyte in the cathode chamber is a MnCl2-NH4Cl-NH3.H2O solution, an electrolyte in the middle chamber is a HCl-KCl solution, an electrolyte in the anode chamber is a H2SO4-(NH4) 2SO4-Fe < 3 + >-Co < 2 + > solution, an anode is a titanium mesh / titanium porous base Pb-Mn-Co-ZrOx composite electrode, and the anode is a titanium mesh / titanium porous base Pb-Mn-Co-ZrOx composite electrode. The cathode is a stainless steel plate, the cation exchange membrane is a polyethylene / polystyrene cation exchange membrane, a perfluorosulfonic acid type cation exchange membrane or a polyvinylidene fluoride cation exchange membrane, and the anion exchange membrane is an imidazole polyether-ether-ketone anion exchange membrane, a quaternized polyvinyl chloride homogeneous anion exchange membrane or a polyphenyl ether anion exchange membrane; and electrolyzing in a double-membrane three-chamber electrolytic bath, separating out oxygen on an anode, and depositing high-purity manganese on a cathode. According to the method, the high-purity manganese sheet can be obtained, the electrolysis current efficiency is high, and the cell voltage is low.