92 results about "Ionomer" patented technology

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.

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 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 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 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.

This invention discloses an ultra-thin, tensile-reinforced packaging film, relating to the field of agricultural packaging film technology. The film has a seven-layer co-extruded structure with a total thickness of 15–22 micrometers. It comprises an outer surface unwinding weather-resistant layer, an inner surface adhesive layer, a core layer with pinhole self-sealing in the middle, and tensile-reinforced crack-blocking layers on both sides. The core layer contains a polyisobutylene sealing phase, a dynamic ionic framework composed of a blend of sodium and zinc ionomers and unneutralized ethylene-acid copolymer, and a compatibilizer containing epoxy-based ethylene copolymers. The molar ratio of epoxy to free acid groups is 0.05–0.25, resulting in polyisobutylene forming a sealing microdomain with a median particle size of 0.3–1.2 micrometers and 90% of the particles having a diameter no greater than 2.5 micrometers. The blocking layer contains a microfibrillated reinforcing phase. Under pre-tension, the film can quickly seal pinholes and reduce oxygen intrusion, while simultaneously inhibiting the migration of the sealing phase, reducing in-roll adhesion and downtime for repairs.

A fluorene-based ionomer containing long alkyl side chains, its preparation method, and its application in anion exchange membranes. This invention belongs to the field of fluorene-based ionomers and their preparation. The purpose of this invention is to solve the technical problem that existing anion exchange membranes based on polymers constructed from ether-free polyfluorene backbones and quaternary ammonium salt cations cannot achieve an optimal balance between mechanical and ion conductivity. This invention introduces long alkyl side chains of a specific length onto a highly rigid fluorene-based polymer backbone, constructing a molecular structure that combines rigidity and flexibility, thereby significantly improving the overall performance of the anion exchange membrane. The resulting fluorene-based ionomer containing long alkyl side chains is applied as an anion exchange membrane component in the field of fuel cell alkaline batteries.

The application discloses a kind of fuel cell ionomer evaluation method and application based on thin liquid film electrode, belong to automobile fuel cell technical field.The method in the application first disperses catalyst and ionomer to be measured in solvent to form electrode slurry, is coated to the surface of gas diffusion layer and forms gas diffusion electrode;Gas diffusion electrode is assembled into working electrode with sealing gasket and graphite flow field plate again and is fixed in electrolytic cell;Add electrolyte to electrolytic cell, adopt lifting method or steam wetting method to construct continuous uniform thin liquid film on the surface of catalytic layer of working electrode, form gas-liquid-solid three-phase interface;Reaction gas is introduced to carry out electrochemical test, and the performance of ionomer is evaluated according to test result.The application simulates the three-phase interface environment in real fuel cell catalytic layer by constructing thin liquid film electrode, realizes the decoupling evaluation of ionomer intrinsic performance and three-phase interface construction effect, and can be applied to fuel cell ionomer screening.

The application discloses a kind of high-performance polypropylene material, polarizing material and its preparation method and application, belong to high polymer material technical field.The high-performance polypropylene material provided by the application includes: PP matrix resin 70-90 parts, cyclic olefin copolymer 5-15 parts, reactive monomer 0.5-2 parts, terminal hydroxyl hyperbranched polyester 0.5-2.0 parts, crown ether modified nano zinc oxide 1-5 parts, ionomer precursor 0.1-0.5 parts, initiator 0.05-0.2 parts, transparent nucleating agent 0.1-0.3 parts and antioxidant 0.2-0.5 parts by weight.The high-performance polypropylene material provided by the application has high transparency, low haze, high interfacial bonding strength, thermal stability and excellent dimensional stability, is suitable for polarizing sheet protective film field, and has good prospect.

The application discloses a method for realizing electrocatalytic reduction of CO2 by using ion liquid cooperated with ionomer modified copper-based catalysts, and adopts a wet chemical synthesis method, selects copper sulfate, lactic acid, sodium hydroxide, ascorbic acid and hexadecyl trimethyl ammonium chloride as materials to synthesize Cu2O copper-based catalysts, introduces ion liquid cooperated with ionomer modified catalysts as high-efficiency electrocatalysts for electrocatalytic reduction of CO2, and effectively improves the CO2 reduction performance of the electrode in a neutral electrolyte. The ion liquid is introduced to optimize the electrode treatment, modify the surface of the electrocatalyst, enhance the mass transfer and activation of CO2, and the ion liquid cooperated with the ionomer shows excellent CO2 electro-reduction performance, improves the selectivity of multi-carbon products, suppresses the hydrogen evolution side reaction, and further reduces the cell voltage.

An electrode ink for water electrolysis of the present invention comprises: a catalyst for water electrolysis; silica nanoparticles; and an ionomer, wherein the silica nanoparticles are included in an amount of 5 to 40 wt% (based on solids content) in the total electrode ink for water electrolysis.

This invention provides a catalyst slurry for fuel cells and its preparation method, relating to the field of fuel cells. The catalyst slurry for fuel cells, by weight, comprises catalyst particles, perfluorosulfonic acid resin ionomer, ultrapure water, lower alcohol, and carbon powder. By employing porous carbon powder with specific properties, which interacts with the perfluorosulfonic acid resin ionomer, this invention can significantly improve the viscosity and stability of the catalyst slurry. Furthermore, the CCM formed after coating this catalyst slurry exhibits good performance and will not produce any adverse effects when in contact with the carbon in the microporous layer of the gas diffusion layer during fuel cell use.

The application belongs to the technical field of organic polymer compound catalysis, and particularly relates to preparation and application of a metal porphyrin-based super-crosslinked porous ionic polymer. The metal porphyrin-based super-crosslinked porous ionic polymer is prepared by one-step Friedel-Crafts alkylation reaction of metal porphyrin or ionic liquid modified metal porphyrin and halogen-containing crosslinking agent or ionic liquid type crosslinking agent, and has metal porphyrin active center, porous structure and ionic characteristics, and can effectively promote the cycloaddition reaction of carbon dioxide and epoxide through a multiple synergistic activation mechanism. In addition, the metal porphyrin-based super-crosslinked porous ionic polymer as a catalyst has the advantages of structural stability, easy separation and recovery, excellent repeated use performance and the like, conforms to the green and sustainable development concept, and has a wide application prospect in the field of carbon dioxide capture and resource utilization.

Resin composition used to form a solar cell encapsulation material, wherein the resin composition comprises: an ionomer (A) of a copolymer based on ethylene and unsaturated carboxylic acids; and an ethylene-based epoxy group-containing copolymer (B), wherein the ionomer (A) of the ethylene-based copolymer based on unsaturated carboxylic acids contains two or more types of metal ions, and wherein, where a total amount of the resin composition for a solar cell encapsulation material is defined as 100% by mass, the content of the ethylene-based epoxy group-containing copolymer (B) is equal to or less than 5.0% by mass.

A method for recycling waste ionomer materials, the method comprising: heating the waste ionomer material in a solvent to disperse the waste ionomer material to form a dispersion of the ionomer in the solvent, the dispersion further containing fluoride anions in the solution; contacting the dispersion with a precipitant or adsorbent to form a solid material containing fluoride anions; and separating the ionomer dispersion from the solid material containing fluoride anions.

The application belongs to the technical field of membrane electrode for hydrogen production by water electrolysis, and particularly relates to a method for continuously spraying to prepare an integrated membrane electrode, a product thereof and application. In view of the core problems of low catalyst utilization rate, weak interface combination and rapid performance decay under long-term operation of the current membrane electrode, which restrict the industrialization, the application provides an innovative integrated preparation scheme. The scheme optimizes the casting solution system and spraying process parameters in cooperation, and in the process of directly spraying the casting film, the natural infiltration behavior of the film solution is used to construct the film-catalyst layer interface with high combination strength and the optimized ionomer gradient distribution structure in situ. Compared with the existing multi-step and non-continuous traditional process, the single-step continuous spraying technology of the application greatly simplifies the production process, avoids the complex subsequent lamination step, and provides a reliable path with high engineering application potential for realizing the high consistency, low cost and large-scale manufacturing of the membrane electrode.

This application relates to a spunbond nonwoven fabric with a smooth feel and long-lasting unidirectional moisture wicking properties, and its preparation method. It belongs to the technical field of unidirectional moisture-wicking spunbond nonwoven fabrics. The fabric includes: a skin-adhering inner layer, an intermediate layer, and an evaporating outer layer. The skin-adhering inner layer comprises 98.5-99.8% matrix resin and 0.2-1.5% first masterbatch. The intermediate layer comprises 96-98.5% matrix resin, 0.5-1% second masterbatch, and 1-3% graft-modified resin. The total mass of the raw material components in the evaporating outer layer is 100%. The evaporating outer layer comprises 95-98% matrix resin and 2-5% second masterbatch. The first masterbatch is a fluorinated compound, and the second masterbatch is a mixture of nano-titanium dioxide and a polyoxyethylene-polypropylene-polyoxyethylene triblock copolymer. The graft-modified resin is a mixture of polyethylene grafted with maleic anhydride and an ionomer. The spunbond nonwoven fabric prepared by this application can simultaneously achieve smoothness, adhesion, and long-lasting unidirectional moisture wicking properties.

The present application relates to a proton exchange membrane with catalytic hydrogen blocking function and its preparation method and application. The proton exchange membrane with catalytic hydrogen blocking function comprises a proton conductive base film layer, a first catalytic hydrogen blocking function layer arranged on one side surface of the proton conductive base film layer, and optionally a second catalytic hydrogen blocking function layer arranged on the other side surface of the proton conductive base film layer; the first catalytic hydrogen blocking function layer and the second catalytic hydrogen blocking function layer each independently comprise a platinum group metal catalyst and a proton conductive ionomer; the loading amount of the platinum group metal catalyst on the proton exchange membrane with catalytic hydrogen blocking function is 0.001-0.1 mg / cm 2 The proton exchange membrane with catalytic hydrogen blocking function provided by the present application can actively consume the permeated hydrogen on the membrane surface or the near interface region, and convert the hydrogen and oxygen into water through in-situ catalytic reaction, thereby reducing the hydrogen cross permeation without significantly increasing the electric resistance.

A method for producing an ion exchange membrane with a catalyst layer, said method comprising: a step (A) in which a catalyst dispersion layer is disposed on at least one surface side of an ion exchange membrane, said catalyst dispersion layer being obtained by molding a catalyst dispersion containing a catalyst and an ionomer resin and having a viscosity of 1-500 Pas at 25 DEG C into a prescribed shape; and obtaining a laminate having an ion exchange membrane and a polygonal catalyst dispersion layer; and a step (B) in which the laminate heated to a temperature of 100 DEG C to 200 DEG C is pressed.

The present application belongs to the field of fuel cell catalyst layer design, and specifically discloses a fuel cell gradient cathode catalyst layer and a design and optimization method thereof. The method obtains local functional requirements of the cathode catalyst layer through regional sensitivity analysis, and guides targeted platinum and ionomer content gradient distribution strategies. Through parameter sensitivity analysis and platinum and ionomer gradient interaction analysis, the key parameters of the distribution strategy, the influence mechanism and the refined value range are determined. Based on the key parameters and their ranges, a data set is generated, a proxy model is constructed, a candidate solution set is obtained, an optimal solution is screened and verified. Based on the method, the gradient cathode catalyst layer is designed, which can reduce the dependence on experience and trial and error, convert the complex component distribution into a low-dimensional parameter optimization problem with clear physical meaning, fully play the synergistic effect of platinum and ionomer distribution, take into account the requirements of proton conduction, oxygen transmission and catalytic reaction, improve the net output power of the fuel cell and improve the reaction uniformity of the cathode catalyst layer.

The present application relates to fuel cell application technical field, especially to a kind of branched type ionomer based on porphyrin and its preparation method and as binder application.The preparation method includes the following steps: S1) by superacid catalytic polymerization reaction preparation porphyrin branched type polymer main chain;The monomer of the polymerization reaction includes porphyrin monomer, aromatic compound monomer and ketone monomer;S2) above-mentioned porphyrin branched type polymer main chain is sequentially deprotonated, quaternized, to obtain branched type ionomer based on porphyrin.The present application provides a series of branched type polymers based on porphyrin, introduce different molar quantities of porphyrin in polymer main chain, the polymer can be used as binder in fuel cell, the structure of polymer with porphyrin is conducive to the transmission of substance.And, using the interaction between porphyrin and platinum makes platinum catalyst better dispersion, improves the utilization of catalyst.

The invention relates to a porous composite catalyst consisting of an Fe-N-C catalytic structure and a tin metal phase, wherein the Sn / Fe atomic ratio of tin to iron is greater than 2 and less than 50, said porous composite catalyst containing micropores and mesopores, wherein the micropore volume is greater than 0.02 cm3 g-1, the mesopore volume is greater than 0.20 cm3 g-1, the micropore volume is the total volume of the micropores, and the mesopore volume is the total volume of the mesopores with a width of between 2 and 30 nm. The invention also relates to the method for synthesizing the catalyst, an ink comprising the catalyst and an ionomer, an electrode containing the catalyst, and a membrane electrode assembly, in particular for a fuel cell.

A boronic acid-functionalized carbon material includes a carbon material and boronic acid groups linked to a surface of the carbon material. The carbon material may include carbon black, graphite, or graphene. The boronic acid groups comprise trivalent boronic acid groups and / or tetravalent boronic acid groups. The boronic acid-functionalized carbon material may be used as a catalyst support, a catalyst binder, and / or an ionomer for cation transport.

This invention discloses a method for preparing dimethyl sulfoxide, relating to the field of electrochemical technology. The method for preparing dimethyl sulfoxide includes the following steps: passing gaseous dimethyl sulfide and water vapor into the anode of an electrochemical reaction device, passing water into the cathode of the electrochemical reaction device, and applying a DC voltage between the anode and cathode to carry out an electrochemical reaction to obtain a product containing dimethyl sulfoxide; wherein, the anode includes a composite matrix and a perfluorosulfonic acid ionomer loaded on the surface of the composite matrix; the composite matrix includes a first substrate and an anti-corrosion coating disposed on the surface of the first substrate, the anti-corrosion coating being made of at least one of ruthenium oxide, iridium oxide, antimony-doped tin oxide, tantalum oxide, and lead oxide, which solves the problems of high energy consumption, low product yield and selectivity in the preparation of dimethyl sulfoxide by liquid-phase electrochemical oxidation method in the prior art.

The invention relates to an assembly composed of an electrolytic cell component of an electrolytic cell of an electrolysis device and an anode-side catalyst layer (15) arranged on the electrolytic cell component, wherein the anode-side catalyst layer (15) comprises first particles (19) of platinum (Pt), second particles (20) of iridium (Ir) and / or ruthenium (Ru) and / or iridium oxide (IrOX) and / or ruthenium oxide (RuOX) and / or mixed phases (IrRuOX) of these oxides, and an ionomer (21), and wherein the first particles (19) and the second particles (20) are adhesively bonded to one another exclusively by means of the ionomer (21).

The present specification relates to a fluorinated polyaromatic polymer comprisingat least one fluorinated unit FU of formula I andat least one cationic unit CU of formula B or C