74 results about "Alkaline anion exchange membrane fuel cells" patented technology

The invention relates to an alkaline anion-exchange membrane fuel cell, and particularly relates to a preparation method of a membrane electrode of an alkaline anion-exchange membrane fuel cell. The structure of the prepared membrane electrode comprises, in order, an anode gas diffusion layer, an anode catalysis layer, an anion-exchange membrane, a cathode catalysis layer and a cathode gas diffusion layer. According to the invention, with the addition of crosslinked anion-exchange resin in the catalysis layers, with the selection of organic solvents with good dispersive capacity and a low boiling point, and through steps of membrane modification and the like, the performance of the alkaline anion-exchange membrane fuel cell is improved greatly.

Disclosed is an Ag/MnyOx/C catalyst. MnyOx is any one of Mn3O4 and MnO or is a compound of Mn3O4 and MnO or a compound of Mn3O4 and MnO2, wherein the mass percentage of MnO2 in the compound of Mn3O4 and MnO2 ranges from 0.01% to 99.9%. The Ag/MnyOx/C catalyst is prepared through high-temperature pyrolysis of AgMnO4 by two steps including (1) preparation of a precursor AgMnO4 crystal and (2) preparation of Ag/MnyOx/C catalyst. The catalyst has high ORR (oxygen reduction reaction) catalytic activity on alkaline condition, is high in stability, low in cost, safe, non-toxic and non-pollution, favorable for environmental protection and capable of being produced massively and the like, can be used as oxygen reduction catalyst for metal air fuel cells, alkaline anion-exchange membrane fuel cells and other alkaline conditions, while resources of raw materials of the catalyst are rich and low in cost.

This invention relates to cross-linked block polymer anion exchange membrane, a preparation method and applications thereof. According to the method, during the membrane preparing, a chloromethylatedblock polymer is simultaneously cross-linked and aminated by using a one-step method; after the membrane is formed, the membrane is further quaternized with tertiary amine; and alkalization is performed to obtain the cross-linked anion exchange membrane. According to the present invention, the polymer is chloromethylated by using the environmentally-friendly low-toxicity 1,4-dichloromethoxybutaneas a chloromethylating agent, the cross-linking and amination of the polymer is performed with the tertiary amine during the membrane forming, and after the membrane forming, the re-amination is performed with the tertiary amine so as to increase the number of the quaternary ammonium groups; with the method, the cross-linking and the quaternization are performed simultaneously during the membraneforming, such that the mechanical strength and the dimensional stability of the cross-linked membrane are improved, and the quaternization efficiency is effectively increased; and the obtained cross-linked anion exchange membrane has high conductivity, and has potential application prospects in alkaline anion exchange membrane fuel cells.

The invention relates to a FeCx@NC core-shell structured catalyst and a preparation method therefor. The FeCx@NC core-shell structured catalyst takes iron and FeCx nanoparticle mixture as the core, and takes nitrogen and FeCx-doped carbon as the shell, and has a mesoporous structure with a specific surface area of 500-900m<2>g<-1>. The preparation method for the core-shell structured catalyst comprises the steps of preparing a polyaniline and glucose composite material firstly; performing calcining for one time to prepare a Fe-N-C catalyst; and finally performing calcining for the second time to obtain the FeCx@NC catalyst. The catalyst is high in oxygen reduction activity and high in stability; the raw materials, such as the carbon source and the nitrogen source used by the preparation method are low in cost, so that the production cost for producing a Fe-N-C material by the conventional pyrolysis method can be lowered; meanwhile, the preparation method is simple and easy to implement; and in addition, the core-shell structured catalyst provided by the invention has relatively high electrocatalytic activity, and can be widely applied to the negative electrode catalyst of a proton exchange membrane fuel cell, an alkali negative ion exchange membrane fuel cell, and a metal air battery.

A multiple quaternary ammonium salt anion exchange membrane and a preparation method thereof relate to an anion exchange membrane. The chemical structure of the multiple quaternary ammonium salt anion exchange membrane is high-molecular polymer with multiple quaternary ammonium salts on side chains. The preparation method comprises the following steps: placing a polymer membrane in an irradiationroom, performing high energy ray irradiation; dipping the polymer membrane after irradiation in a solution with monomer halomethyl styrene for reaction; soaking a membrane obtained in the first grafting reaction in a solution with monomer triethylenediamine for reaction; soaking the membrane after crosslinking quaternarization in a solution with monomer dihalomethyl benzene for reaction; soaking the membrane after the alkylation reaction in a quaternarization reagent for reaction to obtain the product. The prepared anion exchange membrane has high conductivity, good thermal stability, and chemical stability, and is applicable to fields of alkaline anion exchange membrane fuel cells, liquid flow energy storage cells, novel super capacitor, water treatment, metal recovery, etc.

The invention discloses a composite polyepoxy chloropropane alkaline polymer membrane electrode and a preparation method thereof. The membrane electrode comprises an alkaline anion-exchange membrane and an electrode layer, wherein the alkaline anion-exchange membrane is prepared by the following steps: carrying out nucleophilic substitution reaction on halogen atom and tertiary amine to obtain quaternized polyepoxy chloropropane, and compounding with a porous polytetrafluoroethylene membrane; the electrode layer comprises a hydrogen electrode and an oxygen electrode, the hydrogen electrode comprises a gas diffusion layer and a hydrogen electrode catalytic layer sprayed on the gas diffusion layer, and the oxygen electrode comprises a gas diffusion layer and an oxygen electrode catalytic layer sprayed on the gas diffusion layer; the membrane electrode is integrally formed according to the combination sequence of the hydrogen electrode, the alkaline anion-exchange membrane and the oxygen electrode; and the gas diffusion layer is formed by adding hydrophobic polymer to the matrix carbon material. The alkaline membrane electrode disclosed by the invention has the advantages of simple synthesis method of the alkaline anion-exchange membrane, and high ionic conductivity, can adopt a low-cost non-platinum-based catalyst, and is suitable for alkaline anion-exchange membrane fuel batteries.

The present invention relates to fuel cell materials, specifically to a preparation method of an alkaline anion exchange membrane fuel cell electrode catalysis layer three-dimensional resin. The preparation method comprises steps of polymer chloromethylation, quaternization, alkalization and dissolution, and is characterized in that Lewis acid and a chloromethylation reagent are adopted to carry out a chloromethylation reaction on a poly aryl ether polymer, the chloromethylated polymer is immersed in an amination reagent to carry out a quaternization reaction (for example: the chloromethylated polymer is immersed in an aqueous solution of trimethylamine), the quaternized polymer is subjected to an alkalization reaction, and the alkalized polymer is dissolved in a solvent to obtain the electrode catalysis layer three-dimensional resin. The alkaline three-dimensional resin prepared through the preparation method has high ion exchange capacity (1.55-1.98 mmol/g), and meets the work use temperature (50-60 DEG C) of the alkaline anion exchange membrane fuel cell.

The invention relates to a basic anion-exchange membrane fuel battery, and particularly relates to a preparation method of a membrane electrode with a transition layer. The preparation method comprises the following steps: coating basic anion exchange resin between a basic anion-exchange membrane and a catalyst layer to serve as a transition layer, and then coating the transition layer with the catalyst layer consisting of a catalyst and the basic anion-exchange resin to form the membrane electrode with the transition layer, wherein the membrane electrode consists of the basic anion-exchange membrane, the transition layer and the catalyst layer; placing the membrane electrode between two gas diffusion layers to form a membrane electrode assembly, and preparing the membrane electrode with the transition layer. The membrane electrode with the transition layer, prepared by adopting the preparation method, aims at improving phase interface bonding strength of the catalyst layer and the basic anion exchange membrane, enlarging a three-phase reaction interface, promoting the conduction of OH<-> of a cathode catalyst layer, an anode catalyst layer and the basic anion-exchange membrane, improving the performance of the basic anion-exchange membrane fuel battery and the operation stability of the basic anion-exchange membrane fuel battery.

The invention discloses a gold-iridium bifunctional oxygen electrode catalyst, a preparation method and applications thereof. The Au accounts for 5% to 95% of the total weight of the catalyst, and the Ir accounts for 5% to 95% of the total weight of the catalyst. Compared to the conventional bifunctional oxygen electrode catalysts, the catalyst has high activity in the oxygen reduction reaction and oxygen evolution reaction; moreover, the money metal (gold) with large reserves replaces the pricy precious metals (Pt, Ru, Ir, etc.) with scarce reserves, the loading amount of precious metals is greatly reduced, and thus the cost is reduced. Moreover, the preparation process of the gold-iridium bifunctional oxygen electrode catalyst is simple, no toxic substance exists during the preparation process, and the preparation method is safe and pollution-free, and can be easily applied to massive production. The provided catalyst can be used as the renewable alkaline fuel cell bifunctional oxygen electrode catalyst, alkaline negative ion exchange membrane fuel cell oxygen reduction catalyst, and oxygen reduction reaction or oxygen evolution reaction catalyst under other alkaline conditions.

The invention relates to an alkaline anion exchange membrane fuel cell, in particular to a preparation method of an ultrathin cross-linked composite enhanced polymer anion exchange membrane. Accordingto the method, a cheap ultrathin porous base membrane is adopted as a substrate in the membrane preparation process, polymerization crosslinking is thermally initiated in the membrane by adopting a one-step method, and the ultrathin cross-linked composite enhanced polymer anion exchange membrane is obtained after alkalization. The method is characterized in that an ultrathin polyethylene base membrane is used as a base membrane, and a one-step method is adopted to thermally initiate polymerization crosslinking in the membrane, so that the membrane preparation process is effectively simplified, and the computer rate and the dimensional stability of the membrane are improved. The method has the advantages that in the membrane forming process, crosslinking and quaternization are conducted atthe same time, the mechanical strength and the size stability of the crosslinked membrane are improved, and the quaternization efficiency is effectively improved. The cross-linked anion exchange membrane obtained by the invention has relatively high conductivity, excellent dimensional stability and chemical stability, and has a potential application prospect in alkaline anion exchange membrane fuel cells.

The invention relates to the field of the fuel cell, and discloses a preparation method of a carbon/polymer composite bipolar plate. The bipolar plate is composed of polystyrene resin, hydrogenated ethylene-butylene-styrene triblock copolymer, conductive filler and fiber reinforced material. The composite bipolar plate is low in air permeability, good in machining, and excellent in conductivity and corrosion resistance. The composite plate provided by the invention can be applied to a proton exchange membrane fuel cell, alkaline anion-exchange membrane fuel cell and methanol fuel cell.

The invention provides a positively-charged quaternary ammonium salt functionalized polysulfone/nano attapulgite hybridized anion exchange membrane and a preparation method thereof, and belongs to thefield of alkaline anion exchange membrane fuel cells. In the method, trimethylchlorosilane and paraformaldehyde are used as polysulfone chloromethylation reagents, and tin chloride is used as a catalyst; the chloromethylation degree of polysulfone is controlled by controlling the molar ratio of polysulfone to trimethylchlorosilane, paraformaldehyde and tin chloride and the reaction time of chloromethylation; a positively charged quaternary ammonium salt functional group is adopted as a functional group for transmitting OH <-> ions, and the functional group is grafted to chloromethylated polysulfone through a Menschutkin reaction; then, hydrophilic nano attapulgite is adopted as an inorganic additive material and dispersed into a positively charged quaternary ammonium salt functionalized polysulfone solution through high-power ultrasonic, mechanical stirring and other methods, and the positively charged quaternary ammonium salt functionalized polysulfone/nano attapulgite hybrid anion exchange membrane is prepared through a tape casting method.

The invention belongs to the technical fields of catalyst and catalyst preparation, and specifically relates to an Ag/CuO/C oxygen reduction electro-catalyst, which is applied to a metal-air fuel cell, an alkaline anion-exchange membrane fuel cell, and other alkaline conditions, and preparation and applications thereof. During the preparation process of the catalyst, no toxic substance is used; the preparation is safe and pollution-free, and the environment is protected. The application range of the catalyst is wide. The catalyst can be used as an oxygen reduction catalyst in a metal-air fuel cell, an alkaline anion-exchange membrane fuel cell, and other alkaline conditions.

The invention relates to an oxygen reduction catalyst with a core-shell structure and concretely relates to a preparation method and use of a metal-air fuel cell oxygen reduction catalyst, a proton exchange membrane fuel cell oxygen reduction catalyst, a direct liquid fuel cell oxygen reduction catalyst and an alkaline anion-exchange membrane fuel cell oxygen reduction catalyst.

The invention relates to a preparation method and application of an alkaline anion exchange membrane fuel cell anode nano-catalyst. The transition metal oxide cerium dioxide (CeO2) is employed to modify a carbon loaded iridium (Ir/C) nano-catalyst, compared with an Ir/C catalyst prepared by the same method, the prepared Ir/CeO2-C catalyst has a larger specific surface area, higher catalytic activity and better stability under an alkaline condition, also the preparation process is simple, and the conditions are mild. The transition metal oxide (CeO2) modified carbon loaded iridium (Ir/C) nano-catalyst prepared by the method provided by the invention has good application value in alkaline anion exchange membrane fuel cell (AAEMFC) hydrogen oxidation electrocatalysis.

The invention relates to a preparation method for a membrane electrode of an alkali anion exchange membrane fuel cell. Compared with a conventional method, the preparation method is mainly characterized by comprising the steps as follows: performing amination and alkalization on resin which is subjected to chloromethylation firstly, and then preparing catalyst slurry from the resin to prepare the membrane electrode. According to the preparation method, the resin which is subjected to chloromethylation firstly is adopted to prepare the catalyst slurry to prepare the membrane electrode; and then the electrode is immersed in an amine solution to be subjected to amination, and immersed in an alkali solution to be subjected to alkalization. The performance of the cell with the electrode which is prepared by a ''post amination'' method is greatly improved; in addition, the cell proves high stability; and the operating service life of the cell at an operating temperature of 50 degrees still can be longer than 500 hours.

The invention relates to a preparation method of an alkaline anion exchange membrane fuel cell membrane electrode. The method is mainly characterized in that: compared with the traditional catalyst slurry preparation method, a soluble inorganic salt is added into a catalyst slurry to adjust the pore size distribution of membrane electrode; according to the invention, the soluble inorganic salt isadded into the catalyst slurry, then the membrane electrode is prepared by spraying, and then the electrode is soaked in lye for alkalization to enable reaction of the inorganic salt with lye so as togenerate micropores. The electrode prepared by the "dissolution pore-forming" method has improved whole battery performance under high electric current density, and mass transfer polarization can bealleviated to certain extent.

The invention provides a multi-quaternary ammonium side long-chain type polysulfone anion exchange membrane and a preparation method thereof, which belong to the field of high polymer chemistry and alkaline anion exchange membrane fuel cells. The anion exchange membrane comprises polysulfone with different chloromethylation degrees and long hydrophobic chain type quaternary ammonium salt with a plurality of quaternary ammonium functional groups. A long side chain is grafted to chloromethylated polysulfone through a Menshutkin reaction, and a target membrane material is prepared through membrane forming by a tape casting method. By constructing a hydrophilic/hydrophobic microphase separation structure, an effective ion channel is formed, and the hydroxyl conductivity of the membrane is improved; meanwhile, a hydrophobic chain containing long alkyl intervals can reduce the swelling degree of the quaternary ammonium salt membrane, the membrane has good dimensional stability, and the problems of ionic conductivity and dimensional stability existing for a long time in a membrane material are effectively solved. The hydroxyl conductivity of the multi-quaternary ammonium side long-chain type polysulfone anion exchange membrane can reach 0.113 S cm<-1> at the temperature of 80 DEG C, and the alkaline anion exchange membrane with excellent performance is obtained.

The invention relates to a hydroxide IrNi@PdIr/C core-shell catalyst for an alkaline anion exchange film fuse cell and application thereof. The method specifically comprises a step of dissolving an appropriate amount of carbon carriers and a stabilizer in ethylene glycol with chloroantimonic acid and nickel chloride as metal precursor salts, ultrasonically stirring, adjusting pH to be alkaline byusing NaOH, introducing nitrogen gas for protection, adding an excess sodium borohydride reducing agent, and after reaction is completed, preparing IrNi nano particles with the average diameter of 2-4nm through centrifugation, washing and drying, and a step of weighing an appropriate amount of IrNi nanoparticles, placing the appropriate amount of IrNi nanoparticles into deionized water and isopropanol, mixing evenly, adding a PdCl2 solution, and after a replacement reaction for a period of time, obtaining IrNi@PdIr/C core-shell catalyst through centrifugal washing, vacuum drying and heat treatment under a hydrogen atmosphere. The particle size of the catalyst is distributed between 2 and 13 nanometers, and the catalyst is uniformly dispersed without agglomeration. The mass specific activity of the catalyst at 50mV overpotential is 1.78 times of that of commercial Pt/C, 3.06 times of that of Ir/C and 10.8 times of that of Pd/C, and the catalyst has an application value in the hydroxideof the anion exchange film fuel cell.

The invention discloses a polyaryl anion exchange membrane and a preparation method thereof, and belongs to the technical field of fuel cell materials, and the preparation method comprises the following steps: (1) preparing a cation precursor; (2) preparing spiro cations containing side chains; (3) preparation of a polyaryl piperidine polymer; (4) preparing a quaternized polyaryl piperidine polyelectrolyte; (5) preparing a polyaryl piperidine copolymer containing oxygen side chain type spiro cations; and (6) preparing the anion exchange membrane. The main chain of the synthesized polymer has no unstable ether bond, and meanwhile, the side chain type spiro cation is added, so that the membrane has strong alkali resistance. Due to the addition of the hydrophobic block and the flexible side chain, the mechanical property of the membrane is improved, the swelling is reduced, the dimensional stability is improved, meanwhile, the hydrophilic/hydrophobic microphase separation structure of the anion exchange membrane is enhanced, an ion channel is formed in the membrane, the ion transmission rate is improved, and the membrane has relatively high ion conductivity; the method has a wide application prospect in alkaline anion exchange membrane fuel cells.

The invention provides a preparation method of a polymer anion exchange membrane, and the preparation method comprises the following steps: a) preparation of a polymerizable monomer, (2) radiation polymerization of the polymerizable monomer, bis(trimethylsilyl) vinyl phosphonate, Butyl Methacrylate and an emulsifier to prepare a polymer membrane, and 3) ion exchange. The invention also discloses the polymer anion exchange membrane prepared according to the preparation method of the polymer anion exchange membrane, a vanadium battery using the polymer anion exchange membrane as an electrolyte membrane, and a basic anion exchange membrane fuel cell using the polymer anion exchange membrane as a polyelectrolyte membrane. The polymer anion exchange membrane prepared by the method is cheaper than a traditional quaternary ammonium salt anion exchange membrane in the prior art, and has better mechanical properties, chemical stability and thermal stability, and higher ion conductivity.

The invention relates to a preparation method of an alkaline anion exchange membrane, which comprises the following steps of: respectively dissolving an anion exchange resin precursor and a functionalization reagent in an oil phase and a water phase, carrying out functionalization reaction at a two-phase interface by using the resin precursor and the functionalization reagent, and carrying out in-situ self-assembly to form the membrane. According to the method, the problem of gel generated in a traditional homogeneous solution functionalization reaction is solved, and the prepared alkaline anion exchange membrane is high in ordering degree, has hierarchical pore distribution and is controllable in thickness; and the membrane has high ionic conductivity and good water transport characteristics, and has good performances when used in alkaline anion exchange membrane fuel cells.