179results about "Organic diaphragms" patented technology

The present invention relates to a highly dispersible organic-inorganic hybrid nanoparticle radical scavenger having excellent low elution characteristics and reversible regenerability and to an electrode composition comprising same, the highly dispersible organic-inorganic hybrid nanoparticle radical scavenger comprising nanoparticles in which an oxide of cerium (Ce) and silicon (Si) and an oxide of at least one metal (M) selected from transition metals and lanthanides are combined, wherein the nanoparticles have at least one functional group selected from an alkylsulfonic acid group and a fluoroalkylsulfonic acid group.

The application discloses a cross-linked polyaryl piperidine anion exchange membrane and a preparation method and application thereof, and relates to the technical field of anion exchange membranes. The anion exchange membrane takes polyaryl piperidine as a skeleton, introduces crown ether structure and a cross-linked network, and solves the technical problem that the balance between the hydroxyl ion conductivity and the dimensional stability is difficult in the existing anion exchange membrane. The anion exchange membrane comprises a specific structure of a repeating unit, is prepared through Friedel-Crafts superacid catalytic polymerization, Menshutkin reaction functionalization and Michael addition reaction cross-linking, and has excellent hydroxyl ion conductivity, dimensional stability, chemical stability and mechanical strength. The preparation method is simple in operation, fast in polymerization rate, and high in conversion rate, does not need to strictly control the temperature and oxygen of a reaction environment, is suitable for the field of water electrolysis hydrogen production, especially suitable for an anion exchange membrane water electrolysis system, and has a wide industrial application prospect.

The present invention relates to a polymer electrolyte membrane, a method for manufacturing same, and a membrane-electrode assembly, a water electrolysis cell, and a fuel cell each comprising same. The polymer electrolyte membrane comprises, as an electrolyte, a reaction product of a cation conductor and an amine compound, wherein the cation conductor includes at least one sulfonic acid group as a side chain, and the amine compound includes at least one sulfonic acid group as a side chain and at least one amino group as a side chain, a terminal, or a combination thereof.

An object of the present invention is to provide an electrolyte membrane having an excellent joining property between an electrolyte membrane and a catalyst layer. The present invention mainly relates to an electrolyte membrane including a layer (A) containing a polymer electrolyte, and a layer (B) on at least one of the faces of the layer (A), wherein porosity (X1) in an interface region of the layer (B), on the layer (A) side, is higher than porosity (X2) in another interface region of the layer (B), on the opposite side to the layer (A).

To provide a reaction catalyst which reduces the influence of oxygen (O2) and an electrochemical reactor using the same.SOLUTION: In a state where a first surface is in contact with a liquid and a second surface different from the first surface is in contact with a gas, the reaction catalyst is used for producing a reaction product by using a substance contained in the gas or the liquid as a raw material. In the reaction catalyst, a hydrophilic porous layer 40, a catalytic porous layer 30 containing a catalyst used for a reaction to produce the reaction product, and a water-repellent porous layer 34 are arranged in order from the liquid side to the gas side.SELECTED DRAWING: Figure 6

The UV-curable resin composition comprises: urethane (meth)acrylate with a weight-average molecular weight of 1,500 to 20,000 and a double bond equivalent of 600 g / mol to 7,500 g / mol; (meth)acrylate monomer with a molecular weight of 150 to 300; vinyl monomer having an acidic functional group; and a photopolymerization initiator.

An alkaline electrolyzer system comprising an electrochemical cell in proximity to a spacer frame is provided. The spacer frame contains a polymer composition that includes a polymer matrix that contains at least one polyarylene sulfide.

The present invention provides a support for an electrolyte membrane that enables the creation of a composite membrane containing a large amount of proton-conducting components (such as electrolyte resins), and a composite membrane in which an electrolyte membrane is supported by the support. [Solution] The electrolyte membrane support comprises a sheet-like fiber aggregate, in which electrolyte resin particles are present in the voids of the fiber aggregate. The composite membrane is supported by the support.

An anion exchange membrane and a method for producing the same are disclosed. The anion exchange membrane comprises a porous polymer support; and an electrolyte containing an anion exchange polymer; wherein the electrolyte is located on the surface and in part within the pores of the porous polymer support; and the anion exchange polymer is also a crosslinking product of a composition containing a crosslinkable monomer represented by the following chemical formula 1 and an ionic monomer represented by the following chemical formula 2: JPEG2026516927000016.jpg56170 In chemical formulas 1 and 2, A, R1, R2, R3, R4, X - , Y - p, q, and r are as disclosed in the specification, respectively.

According to an embodiment of the present application, an anion exchange membrane and a method for manufacturing the same can be provided, which contains a carbazolyl polymer but has reduced polymer cracking characteristics.

To provide a water quality alkalization device which prevents short-circuit between an anode and a cathode.SOLUTION: A water quality alkalization device includes: a first electrode unit; a second electrode unit; and a separation unit formed of an insulative resin, the separation unit positioned between the first electrode unit and the second electrode unit and bonded to one of the first electrode unit and the second electrode unit. Voltage is applied between the first electrode unit and the second electrode unit immersed in an electrolytic solution, thereby electrolyzing the electrolytic solution to produce basic liquid.SELECTED DRAWING: Figure 1

The present application relates to a kind of integrated reinforcing membrane for water electrolysis and its preparation method and application, the integrated reinforcing membrane for water electrolysis includes reinforcing fabric and short side chain perfluorosulfonic acid resin covering the reinforcing fabric;The reinforcing fabric includes aromatic polymer mesh cloth.The integrated reinforcing membrane for water electrolysis provided by the present application is made into the proton exchange membrane for water electrolysis by protonation treatment, with the characteristics of low surface resistance, high wet tensile property, good dimensional stability under high temperature and high pressure water electrolysis working condition, and with gas barrier ability can reduce the risk of mixed gas.

A system and method are disclosed for increasing the production yield of CO2 conversion products in an electrochemical reactor assisted by an osmotically driven dewatering system. The system comprises an electrochemical cell including a cathode chamber, an anode chamber, and a central desalination chamber. The cathode chamber includes a cathode active material, and the anode chamber includes an anode active material. The central desalination chamber comprises a plurality of desalination cells, each featuring alternating anion exchange membranes (AEMs) and cation exchange membranes (CEMs). A forward osmosis membrane (FOM) is integrated at the interface between the cathode chamber and the adjacent desalination cell, replacing the conventional terminal CEM. This configuration establishes an osmotic gradient that drives water flux from the cathode chamber into the desalination chamber, thereby concentrating the CO2 conversion product (e.g., formate) in situ and enhancing Faradaic efficiency without requiring post-treatment.

The application provides a nanofiber membrane for CO2 reduction and a preparation method and application thereof, and belongs to the field of electrocatalytic reduction of CO2. The nanofiber membrane has a porous structure, the average pore diameter of the nanofiber membrane is 1.8-2.5 mu m, the porosity is 42%-50%, and the thickness of the nanofiber membrane is 20-60 mu m. The nanofiber membrane is a three-dimensional network structure built by a plurality of extremely fine fibers and full of nanoscale pores, and can significantly improve the ethylene Faraday efficiency and product selectivity in the process of electro-reduction of CO2. The application further provides a preparation method of the nanofiber membrane, the porous nanofiber membrane is obtained by using natural cellulose, by a mechanical dissociation method and by optimizing the membrane thickness and the interface microenvironment, and has good ion conductivity and gas barrier capacity, and the ethylene Faraday efficiency of the nanofiber membrane is more than 70% at 700 mA cm ‑2 , which is more than 10% higher than that of a traditional anion exchange membrane system.

The application discloses a cationic polymer containing a fused ring structure and a preparation method and application thereof, and an anion exchange membrane based on the cationic polymer is prepared by using the cationic polymer containing a fused ring structure in a main chain. By introducing a fused ring structure element into the main chain of the cationic polymer, the interaction force between the formed polymer chains is increased by using the pi-pi interaction between the fused ring structures, the water absorption and swelling of the cationic polymer are inhibited, and thus the anti-swelling ability and the dimensional stability of the anion exchange membrane prepared from the cationic polymer are improved. In addition, by using the high reactivity of the fused ring structure monomer, the molecular weight of the cationic polymer is increased, and other monomers are copolymerized to regulate the performance of the cationic polymer, so that the anion exchange membrane prepared from the cationic polymer has excellent comprehensive performance, and is beneficial to the application in the fields of anion exchange membrane fuel cells and water electrolysis.

The embodiment of the application provides a branched anion exchange membrane material and a preparation method and application thereof. The material has a structure shown in formula 1, wherein x>0, y>0, and 1-x-y>0. The branched poly (fluorenyl-aryl-piperidine) anion exchange membrane material has excellent conductivity, and provides a high-performance and low-cost anion exchange membrane material for anion exchange membrane water electrolysis technology, thereby promoting the industrialization process of green hydrogen production technology.

Provided is a catalyst-coated electrolyte membrane that has low voltage in an anion exchange membrane water electrolysis test, excellent water electrolysis performance, and sufficient durability to the extent that there is no problem even when used in an AEMWE method. The catalyst-coated electrolyte membrane (100) has: (A) an electrolyte membrane (11) having a breaking point stress of 85 MPa or more; and (B) a catalyst layer (12, 13).

An alkaline water electrolyzer (AWE) incorporates a cation-exchange membrane (CEM) instead of a conventional porous diaphragm or an anion-exchange membrane used in the conventional AWE. The corresponding change in the nature of the charge carrier from the hydroxyl anion (OH_) in the conventional AWE to an alkali cation (A+) has a substantial effect on the electrochemistry and performance of the resulting CEM-alkaline water electrolyzer (CEM-AWE). The water electrolysis device combines advantages of: 1) non-PGM (precious group metal) catalysts involved in L-AWE (liquid alkaline water electrolyzer) and in AEM-AWE (anion exchange membrane-AWE), and 2) higher efficiency, differential pressure operation, responsiveness, and long-life of PEM-WE (proton-exchange membrane water electrolyzer). The novel water electrolyzer combines advantages of the two in the CEM-AWE involving non-PGM catalysts, graphite / SS PTLs and bipolar plates. Conventional approaches to electrolysis based hydrogen generation have not employed a CEM in an AWE.

The present disclosure relates to a membrane-electrode assembly, a method for manufacturing same, and an electrochemical cell comprising same. More specifically, by introducing a bonding layer containing a polyphenol compound having adhesive strength under moisture, the membrane-electrode assembly may have improved interfacial bonding between an electrode and a polymer electrolyte membrane and stability, without performance degradation, and improved chemical durability due to the removal of radicals generated when the electrochemical cell is in operation.

The present invention relates to a hydrogen gas production assembly comprising a hydrogen gas production device, a container containing an aqueous electrolyte solution, a storage container for storing the generated hydrogen gas, an inlet for supplying the aqueous electrolyte solution from the container to the hydrogen gas production device, and an outlet for transferring the generated hydrogen gas from the hydrogen gas production device to the storage container. The present invention further relates to a method for producing hydrogen gas using the hydrogen gas production assembly.

The present invention relates to a poly(arylpiperidinium) copolymer ionomer in which a branched piperidinium group is introduced into a repeating unit while having no aryl ether bond in the polymer backbone, which has excellent chemical stability, excellent mechanical properties while having a high molecular weight, a low expansion rate, high dimensional stability and ionic conductivity, and a limited phenyl adsorption effect. Further, an anion exchange membrane produced from the above branched poly(arylpiperidinium) copolymer ionomer can operate even under low humidity conditions and has excellent water management ability, and thus can be applied to membranes and binders for alkaline fuel cells, water electrolysis devices, carbon dioxide reduction, vanadium redox flow batteries, or metal-air batteries.

Disclosed in the present specification is a method for manufacturing a bipolar plate. The method for manufacturing a bipolar plate comprises a step of heating and pressing a laminate of a metal plate and a plastic plate. According to the manufacturing method disclosed in the present specification, the bipolar plate including the metal plate and the plastic plate attached to each other can be economically manufactured by a relatively simple process. In addition, the bipolar plate manufactured by the manufacturing method is lightweight and can satisfy the conditions required for the bipolar plate.

A membrane-catalyst layer structure is provided that can maintain good power generation performance or good electrolysis performance for a long time, respectively. A membrane-catalyst layer structure is provided in which a first catalyst layer and a second catalyst layer are sandwiched opposite each other by a membrane comprising at least a polymer electrolyte membrane. The first and second catalyst layers comprise platinum and / or iridium as a first metal, and the first and / or second catalyst layers further comprise at least one element selected from gold, silver, copper, nickel, palladium, cobalt, rhodium, iron, ruthenium, and osmium as a second metal. The membrane comprises a compound N having a nitrogen-containing heterocycle.

A water electrolysis electrode includes an electroconductive substrate and a layered double hydroxide layer. The layered double hydroxide layer is disposed on a surface of the electroconductive substrate. An extinction coefficient k800 of the layered double hydroxide layer at an wavelength of 800 nm is 0.08 or more.

This invention discloses a solid polymer membrane electrolyzer and its water-gas transmission flow field plate, including a flow field plate body, an inlet and outlet area, a turbulence zone, a confluence zone, and a flow channel area. The inlet and outlet are equipped with distributors and guide slopes at their inlet and outlet ends. The turbulence zone and confluence zone are equipped with crescent-shaped boss structures. The flow channel area is divided into upstream and downstream parts. The upstream flow channel area adopts a periodically contracting flow channel and has circular boss structures in the non-contraction area. The downstream flow channel area has bubble-breaking barbed structures on both sides of the rib plate. This invention promotes the distribution and collection of electrolyte through optimized inlet and outlet structures. The upstream flow channel area increases the local flow velocity and achieves initial bubble dispersion through periodic contraction and the circular boss structure. Simultaneously, the bubble-breaking barbed structure in the downstream flow channel achieves secondary bubble breaking and rapid detachment, reducing internal blockage of the flow channel, significantly improving the uniformity of water-gas distribution, and enhancing electrolysis performance.

The present invention relates to a water electrolysis operation control system linked to power produced from solar energy, and, to a water electrolysis operation control system linked to solar-generated power for maximizing hydrogen production relative to renewable energy generation. The present invention comprises: a water electrolysis system (100) that is supplied with power from a solar power system and produces hydrogen; and a control unit (200) that controls an output of the water electrolysis system, wherein the control unit adjusts the output of the water electrolysis system according to the variability of the amount of solar power generation, by controlling the output of the water electrolysis system, controlling regular time intervals, controlling regular output intervals, and combining the control of the regular time intervals and the control of the regular output intervals, thus having the effect of reducing ESS capacity and increasing hydrogen production efficiency by means of a water electrolysis operation method that actively responds to the variability of renewable energy.

An anion exchange membrane and a method of preparing the same are provided. The anion exchange membrane includes a porous polymer support, and an electrolyte containing an anion exchange polymer, wherein the electrolyte is located at least on a portion of the surface and the inside of pores of the porous support, and the anion exchange polymer may be a crosslinked product of a composition including a crosslinkable monomer represented by Formula 1 and an ionic monomer represented by Formula 2.In Formulas 1 and 2, A, R1, R2, R3, R4, X−, Y−, p, q, and r are as disclosed in the specification.

The present disclosure relates to a poly(aryl piperidinium) copolymer ionomer which is grafted with a propargyl group, contains a piperidinium group, and does not have any aryl ether bond in the polymer backbone; an anion-exchange membrane cross-linked therefrom, and a method for preparing the same. The poly(aryl piperidinium) copolymer ionomer grafted with the propargyl group has excellent chemical and thermal stability, ionic conductivity, mechanical properties, dimensional stability, and durability. In addition, the cross-linked anion-exchange membrane prepared therefrom is greatly improved in the peel strength of the catalyst layer, thus promoting the interaction between the ionomer and the membrane and stabilizing the catalyst layer to remarkably improve the durability of a fuel cell.

Described herein are gas diffusion anodes, electrolytic systems comprising such anodes, as well as methods of using such systems. A gas diffusion anode comprises a current collector, an anode porous base, an anode catalyst layer, and an anode-liquid interfacing layer. During the operation, the anode gas chamber receives hydrogen gas, which flows through the current collector into the anode porous base. The anode porous base provides uniform distribution of the hydrogen gas as well as uniform current density. The anode catalyst layer converts the hydrogen gas into protons and returns electrons, through the anode porous base, to the current collector. Protons are transported by the anode-liquid interfacing layer to an anolyte. This layer also blocks the anolyte from contacting the anode catalyst layer. The anode porous base, anode catalyst layer, and anode-liquid interfacing layer help to prevent the migration of the anolyte into an anode gas chamber.

Provided are: a separator for alkaline water electrolysis, the separator comprising a porous base material that contains an organic polymer, and a nonionic surfactant that has an HLB value of not less than 3.0 but less than 12.0, wherein at least the outer surface of the porous base material is covered with the nonionic surfactant; an alkaline water electrolysis member; an alkaline water electrolysis cell; an alkaline water electrolysis device; and a method for producing hydrogen.