311 results about "Ionomer" patented technology

The invention provides a novel polynorbornene anion exchange ionomer containing a polar functional group as well as a preparation method and application of the novel polynorbornene anion exchange ionomer. The polynorbornene has excellent thermal stability and chemical stability. Meanwhile, the AEI main chain of the polynorbornene has no aryl group, so that the adsorption influence caused by the aryl group is avoided. The synthesized addition polynorbornene AEI in the form of quaternary ammonium salt can be dissolved in a low-boiling-point solvent, and it is ensured that a membrane electrode can be prepared through a solvent casting method. Besides the solubility of the AEI, the addition polynorbornene-based AEI in the form of quaternary ammonium salt is modified by utilizing a thiol-ene click reaction, an anion exchange ionomer containing a polar functional group can be prepared, the interaction between the AEI and an electrolytic catalyst is improved, the reaction is simple and easy to operate, the universality is high, and the method is suitable for industrial production. And the current density in the AEMWE system containing the AEI can be effectively improved.

The invention discloses an anion exchange membrane electrode and a preparation method and application thereof, and belongs to the technical field of new energy material and catalytic electrode preparation, the method comprises the following steps: S1, preparing an anode catalyst slurry comprising a hydrophobic covalent organic framework material, an anode catalyst, an anion exchange ionomer and a solvent; s2, preparing a cathode catalyst slurry of which the components comprise a cathode catalyst, an anion exchange ionomer and a solvent; and S3, respectively spraying or coating the anode catalyst slurry and the cathode catalyst slurry on two side surfaces of an anion exchange membrane or a gas diffusion layer, and carrying out heat treatment to obtain the anion exchange membrane electrode. The method provided by the invention can solve the problems of large gas-liquid-ion three-phase mass transfer resistance, easy shielding of active catalytic sites by ionomers and unbalanced water management in the membrane electrode assembly in the existing AEMWE device.

The invention relates to a system and a method for measuring the content of free ionomers in high-solid-content catalyst slurry of a fuel cell, and belongs to the technical field of analysis of catalyst slurry of the fuel cell. Separating the catalyst slurry into a supernatant containing free ionomers and a catalyst aggregate precipitate; the filtering device is used for filtering the supernate and removing residual solid particles in the supernate to obtain filtrate; the evaporation device is used for carrying out drying treatment on the filtrate obtained after filtration, and completely evaporating solvent components in the liquid to obtain free ionomer solids; and the weighing device is used for accurately weighing the materials in the centrifuging, filtering and drying processes. Compared with the prior art, the system and the method for measuring the content of the free ionomer in the catalyst slurry of the fuel cell, which are provided by the invention, are accurate in measurement result and wide in applicability through the processes of centrifuging, filtering and drying and accurate weighing.

The invention discloses a hydrophobic gas diffusion electrode loaded with silver nanoparticles and application of the hydrophobic gas diffusion electrode in electrocatalytic carbon dioxide reduction, and belongs to the technical field of electrocatalysis. The hydrophobic gas diffusion electrode comprises a gas diffusion layer and a catalyst layer sprayed on the gas diffusion layer; the catalyst layer comprises a silver nanoparticle catalytic material, a first ionomer and a second ionomer; wherein the first ionomer is a fluororesin ionomer, and the second ionomer is a quaternized polysulfone ionomer. A system for preparing CO by reducing CO2 through electro-catalysis is constructed, the system comprises an MEA electrolytic cell, a cathode, an anode and an anion exchange membrane, and the cathode adopts the hydrophobic gas diffusion electrode loaded with the silver nanoparticles. The preparation method is mild in preparation condition and environmentally friendly, the modified hydrophobic gas diffusion electrode has high hydrophobicity, efficient conversion of CO2 can be achieved under the high current density, FECO can reach 96.5% under the high current density, and excellent catalytic performance is shown.

The invention relates to the field of fuel cell catalysts, and discloses a method for improving a membrane electrode catalyst layer of a proton exchange membrane fuel cell by using a sulfonic acid group modified carbon material, which comprises the following steps: adding a carbon material into an acid solution, carrying out reflux reaction, washing and drying to obtain a carbon material with an oxygen-containing functional group; adding the carbon material containing the oxygen functional group into an organic solvent for dispersion, adding an organic matter containing a sulfonic acid group after reaction, and performing condensation reaction to obtain a sulfonic acid group modified carbon material; and adding the sulfonic acid group modified carbon material into the proton exchange membrane fuel cell slurry to prepare the sulfonic acid group modified material improved proton exchange membrane fuel cell membrane electrode. A sulfonic acid group and water molecules form a hydrogen bond under a low-humidity working condition, so that the water retention capacity of the catalyst layer is improved, and the proton conduction capacity is improved; under the high-humidity condition, due to the ionization charge repulsion effect of sulfonic acid groups and ionomers, the adsorption of the ionomers on the surface of the carbon material is reduced, the porosity of the catalyst layer is improved, the discharge of redundant water is facilitated, and the gas transmission rate is increased.

A resin composition that contains: (A) a bio-polyethylene resin; (B) an ethylene-vinyl alcohol copolymer having an ethylene content of 20 to 60 mol %; and (C) at least one component selected from the group consisting of an ethylene-vinyl acetate copolymer, an acid-modified ethylene-α-olefin copolymer, an ethylene-unsaturated monocarboxylic acid copolymer, an ionomer of the ethylene-unsaturated monocarboxylic acid copolymer, an ethylene-vinyl alcohol copolymer having an ethylene content of 70 to 90 mol %, and a hydrotalcite compound. The resin composition employs a bio-polyethylene resin and yet can suppress gumming and provide a formed product having an excellent appearance.

The invention belongs to the technical field of fuel cell membrane electrode preparation, and particularly discloses a preparation method for improving fuel cell catalyst layer ionomer distribution, which comprises the following steps: placing a carbon nanotube in dilute nitric acid, carrying out uniform ultrasonic dispersion, then carrying out oil bath heating, carrying out continuous acidification treatment, then carrying out suction filtration, and drying to obtain a carbon nanotube catalyst layer; carbon nano tube powder subjected to acidizing treatment is obtained; mixing the acidized carbon nanotube powder with a Nafion solution in proportion, and removing a solvent through rotary evaporation to obtain a carbon nanotube-Nafion compound; mixing the carbon nanotube-Nafion compound with a commercial Pt / C catalyst, deionized water and ethanol in proportion, and performing ultrasonic treatment under an ice bath condition to obtain uniformly dispersed cathode catalyst slurry; and spraying the uniformly dispersed cathode catalyst slurry on the cathode side of the proton exchange membrane to obtain the catalyst layer for improving ionomer distribution.

The invention relates to the technical field of hydrogen production by electrolyzing water, and provides a preparation method of anode catalyst slurry of PEM electrolyzed water, slurry and a catalytic layer.The preparation method comprises the steps that S1, an anode catalyst, a first ionomer and a first solvent are mixed and dispersed, and first catalyst slurry is obtained; s2, mixing and dispersing a dehydrogenation catalyst, a second ionomer and a second solvent to obtain second catalyst slurry; the dehydrogenation catalyst is a carbon-supported noble metal catalyst; and S3, mixing the first catalyst slurry and the second catalyst slurry, and carrying out homogenization treatment to obtain the anode catalyst slurry. The method has the advantages that the effects of improving uniformity, improving mass transfer and reducing hydrogen in oxygen are achieved at the same time through the cooperative arrangement of the adding of the hydrogen elimination additive, the slurry preparation process steps and the like, and the performance and the safety of the membrane electrode are improved.

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 provides a deep-sea high hydrostatic pressure resistant ionic polymer hydrophone structure and an assembly method, and belongs to the technical field of underwater acoustic sensing, the deep-sea high hydrostatic pressure resistant ionic polymer hydrophone structure comprises an upper shell, a shielding copper net, a substrate, a circuit board, a lower shell, a dry state sensitive film, a screw, a pressing plate, a positive electrode and a negative electrode, the shielding copper net is arranged at the top of the lower shell, a dry-state sensitive film is fixed on the front surface of the substrate, a circuit board is adhered to the back surface of the substrate, the substrate is inserted into the lower shell, a cavity at the lower part of the substrate is encapsulated and cured, and after the pressure-resistant shell is packaged, water is injected into the shell of the ionic polymer hydrophone and defoaming is performed. And finally, sealing and curing the water injection hole of the lower shell by using a sealant to form the ionic membrane polymer hydrophone. According to the invention, perfect packaging, low sound wave loss and good low-frequency sensitivity of the hydrophone in a deep water condition can be ensured, and the hydrophone has important popularization and application values for the work of the hydrophone in a deep sea level.

A membrane electrode assembly for a fuel cell includes, in this order, a cathode catalyst layer, a solid polymer electrolyte membrane, and an anode catalyst layer. The cathode catalyst layer contains at least a catalyst and a highly oxygen-permeable ionomer. At least one selected from the group consisting of the cathode catalyst layer, the solid polymer electrolyte membrane, and the anode catalyst layer contains a nitrogen-containing multidentate ligand coordinatable to an iron ion.

The present invention relates to a water electrolysis electrode, a membrane electrode assembly comprising same, and an electrolysis cell comprising the membrane electrode assembly. Provided are a water electrolysis electrode, a membrane electrode assembly comprising same, and an electrolysis cell, the water electrolysis electrode comprising: a substrate; and a catalyst layer positioned on the substrate and comprising an iridium oxide and an iridium oxide-ionomer aggregate.

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.

To provide a novel porous material with antistatic properties. [Solution] This technology provides a porous body containing an ionomer and having continuous pores. The porous body may be obtained by extracting and removing the pore-forming material from a resin composition containing the ionomer and a pore-forming material. The porous body has a surface resistance value of 10 13 The ratio may be less than or equal to Ω / □. Furthermore, this technology also provides a cleaning material comprising the porous body.

The invention discloses a membrane electrode assembly and a preparation method and application thereof, and belongs to the technical field of new energy materials. According to the present invention, by using the super acid catalysis polymerization reaction, the piperidone and the different aromatic monomer compounds are synthesized into the aromatic polymer with the main chain not containing the ether bond and other unstable groups, such that the aromatic polymer can be simultaneously adopted as the diaphragm and the ionomer material; the membrane electrode can be applied to a methanol electrocatalytic oxidation coupling hydrogen production electrolytic tank and an alkaline water electrolytic tank. Through uniform compounding of the ionomer and the catalyst, non-uniform covering of the ionomer on the surfaces of catalyst particles is inhibited, the utilization rate of the catalyst is increased, and the catalyst layer and the diaphragm have good compatibility. The membrane electrode prepared by the method is stable in structure and low in cost, and has a good industrial application prospect.

The invention relates to an anion exchange membrane containing a composite film of an ionomer and zirconium oxide particles of formula ZrO2, the ionomer being a block polymer of formula (AB)nA, the symbol A representing a polyvinylaromatic block bearing quaternary amine groups, the symbol B representing a hydrogenated block of a poly(1,3-diene) or a copolymer comprising monomer units of a 1,3-diene and a vinylaromatic monomer, n being an integer equal to or greater than 1, the zirconium oxide particle content of the composite film being greater than 40% by mass of the composite film mass, the zirconium oxide particles having a median volume size, D50, greater than 100 nm and less than 1 µm. The membrane exhibits good plasticity.

The present disclosure relates to a composition comprising from 1% to 99% by weight of a first ethylene acid copolymer having a melt strength (MS) < = 1.5 cN, the first ethylene acid copolymer comprising the polymerization reaction product of: from 60% to 99% by weight of an ethylene monomer; and a carboxylic acid comonomer. The composition further comprises: 1% to 30% by weight of a second ethylene acid copolymer comprising the polymerization reaction product of: 60% to 99% by weight of an ethylene monomer; and a carboxylic acid comonomer; wherein: the second ethylene acid copolymer has at least 8 wt% more carboxylic acid comonomer than the first ethylene acid copolymer; the composition comprises greater weight percent of the first ethylene acid copolymer than the second ethylene acid copolymer; and the composition comprises a total acid content of less than or equal to 6.5 wt% based on the total weight of carboxylic acid comonomers in the composition.

Electrodes useful for membrane-free electrode assemblies, membrane-free electrode assemblies, methods of making, and uses thereof. The electrodes comprise a catalyst layer; and a solid polymer electrolyte layer for ion-conduction deposited on the catalyst layer. The solid polymer electrolyte layer is deposited on a catalyst layer as an ionomer resin solution and forms an ion conducting layer thereby eliminating the need for a stand-alone membrane that is introduced as a separate component into electrode assemblies.

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.

The invention discloses a photocurable polyimide ionomer composition and a preparation method and application thereof, and the photocurable polyimide ionomer composition comprises the following components in parts by weight: 30 parts of polyimide oligomer; 5 to 100 parts of a reactive diluent; 2 to 5 parts of a photoinitiator; and 0.2 to 1.5 parts of alkali. The invention provides a photocurable polyimide ionomer composition as well as a preparation method and application thereof, and solves the problem of high shrinkage rate of a workpiece caused by high-temperature imidization and solvent volatilization of an existing photocurable polyimide system. And the heat resistance, the mechanical property and the printing manufacturability are difficult to consider due to poor compatibility of polyimide and a photocuring component. The polyimide ionomer composition is suitable for photocuring additive manufacturing processes such as stereolithography.

The invention provides a metal phthalocyanine-based super-crosslinked ionic polymer as well as a preparation method and application thereof, the polymer material has a porous structure and a relatively high specific surface area, so that the polymer material can be used as an adsorption or separation material; and it is verified that the catalyst can be used as a catalyst for carbon dioxide capture and conversion under heterogeneous conditions.

The application discloses a preparation method of a reversible crosslinking POE ionomer, and comprises the following process: POE, a multi-vinyl ionic compound, a grafting aid and an initiator are blended to obtain a mixture; the mixture is subjected to a melt grafting reaction through a double-screw extruder, and POE ionomer is obtained after extrusion and granulation. The POE ionomer provided by the application has improved mechanical strength and elongation at break, and still has a very high performance retention rate and excellent reprocessing characteristics after secondary processing.

A method for recycling a waste ionomer film, wherein the waste ionomer film comprises platinum, palladium, and / or ruthenium disposed within an internal region of the waste ionomer film, the method comprising: (a) treating the waste ionomer film with a solution comprising an acid and an oxidizing agent, wherein the platinum, palladium, and / or ruthenium are leached from the internal region of the waste ionomer film into the solution; and (b) separating the solution containing the leached platinum, palladium, and / or ruthenium from the waste ionomer film, which remains in a solid form during the leaching process.

The invention provides an ethylene-(methyl) acrylic acid ionomer and a preparation method and application thereof, the ethylene-(methyl) acrylic acid ionomer is formed by neutralizing part of carboxyl in an ethylene-(methyl) acrylic acid copolymer by cesium ions, and the neutralization degree of the ethylene-(methyl) acrylic acid ionomer is 10-50 mol%. According to the ethylene-(methyl) acrylic acid ionomer, cesium ions serve as neutralizing ions, and ion clusters which are properly dispersed and have strong interaction can be formed in cooperation with a specific neutralization degree, so that the ethylene-(methyl) acrylic acid ionomer has higher energy storage modulus and loss modulus and has more excellent performance in the aspects of mechanical viscoelasticity and damping performance; and excellent processing fluidity and thermodynamic stability are realized.

The invention discloses a preparation method of a reversible cross-linked POE ionomer, which comprises the following steps: blending POE, a polyvinyl ionic compound, a grafting auxiliary agent and an initiator to obtain a mixed material; and carrying out melt grafting reaction on the mixed material through a double-screw extruder, extruding and granulating to obtain the POE ionomer. The POE ionomer provided by the invention has improved mechanical strength and elongation at break, still has extremely high performance retention rate after secondary processing, and has excellent reprocessing characteristics.

The invention relates to a multi-layer electrode for the electrolysis of CO2, in particular to a bipolar multi-layer electrode for the stable electrochemical reduction of CO2 to hydrocarbons and a corresponding electrochemical cell. Thus, a multilayer electrode (10) for CO2 electrolysis is proposed, comprising: a gas diffusion layer (12) having a predetermined pore size suitable for CO2 diffusion; a catalyst layer (14) adjacent to the gas diffusion layer (12) and comprising a copper-based cathode catalyst; and a conductive layer (16) adjacent to the catalyst layer (14), where the gas diffusion layer (12), the catalyst layer (14) and the conductive layer (16) together form a gas diffusion electrode, and where the catalyst layer (14) comprises a predetermined amount of anion exchange ionomer (18) and the conductive layer (16) comprises at least one layer comprising a predetermined amount of cation exchange ionomer (24). According to the invention, the electrically conductive layer (16) comprises a graphitic layer (20) comprising a predetermined portion of a cation exchange ionomer (24).

The invention relates to the technical field of metallocene polyethylene materials, in particular to an FFS heavy packaging film and a preparation method thereof. The problems of balance contradiction between rigidity and impact resistance of a traditional product and narrow heat-sealing window are solved. A finished product is prepared from modified metallocene polyethylene, POE grafted zinc salt ionomer, core-shell structure toughening particles, linear low-density polyethylene, functional filler and a processing aid. Polarization and ionization modification of metallocene polyethylene and POE are achieved through reactive extrusion, and the puncture resistance of the material is improved through the physical cross-linking effect of ion clusters and the multi-stage toughening effect of core-shell particles; and meanwhile, by virtue of the cooperation of the thermal reversibility of the ionomer and a specific film blowing process, the initial temperature of heat sealing is reduced, and the sealing safety problem in a dust environment is solved.

The application belongs to the technical field of fuel cell application, and discloses a polynorbornene-based anion exchange ionomer with double-domain coupled ion channels, a preparation method and application thereof. The polynorbornene-based anion exchange ionomer simultaneously constructs an ion domain rich in cation groups and a synergistic functional domain rich in oxygen-containing functional groups at a molecular scale, the two types of domains are coupled with each other in the material and form a continuous double-domain ion transmission network, so that the ionomer can still maintain a stable and continuous hydrogen and oxygen ion transmission channel under the conditions of a thin layer state of a cathode catalyst layer and limited hydration, and effectively improves the ion transmission connectivity and catalyst utilization efficiency of the catalyst layer interface. The ionomer is suitable for being used as an ion-conducting bonding material of a cathode of an alkaline membrane fuel cell, can improve the oxygen reduction reaction performance of the cathode, and provides a new material and structural design idea for a low-noble metal loading and high-power density fuel cell electrode structure design.

The present invention relates to a reinforced composite membrane for a hydrogen fuel cell and a manufacturing method therefor. One embodiment provides a technique for controlling the thickness of a reinforced composite membrane for a hydrogen fuel cell, manufactured by adjusting the thickness of a PTFE membrane and the coating thickness of an ionomer. The manufacturing method for a reinforced composite film for a hydrogen fuel cell, according to the present invention, comprises the steps of: preparing a polytetrafluoroethylene (PTFE) membrane; coating both sides of the PTFE membrane with an ionomer to form an ionomer-coated layer; and drying the coated PTFE membrane.

The present invention provides a membrane electrode for hydrogen production by alkaline water electrolysis, a method for producing the same, and an electrolytic cell. The manufacturing method according to the present invention is a method of direct coating and hot pressing, which can obtain a membrane electrode in which the catalyst layer is uniform and firmly attached to the surface of the diaphragm, can be given good stability to the membrane electrode, and the obtained membrane electrode has a significantly reduced water electrolysis overpotential. The manufacturing method includes the step of directly coating a catalyst slurry on both sides of a diaphragm, drying it, hot pressing it, and then forming a catalyst layer on each side of the diaphragm to obtain the membrane electrode, wherein the diaphragm is selected from a porous diaphragm or an alkaline anion exchange membrane, the catalyst slurry contains a binder solution and a catalyst, the binder solution is one or more of a perfluorosulfonic acid resin solution and a perfluorosulfonic acid ionomer dispersion, the mass concentration of the binder solution is 5 to 30%, and the mass ratio of the binder solution to the catalyst is 1:1 to 4:1.