68 results about "Alkaline fuel cell" patented technology

The invention relates to a composite alkaline ionic membrane as well as a preparation method and application thereof. The composite alkaline ionic membrane is obtained by carrying out anion exchange on a composite membrane consisting of a quaternized anion exchange membrane type polymer and an ion solvated polymer nanofiber membrane, the quaternized anion exchange membrane type polymer is distributed on the surface and in pores of the ion solvated polymer nanofiber membrane, and the quaternized anion exchange membrane type polymer and the ion solvated polymer nanofiber membrane are combined through a covalent bond; the preparation method comprises the following steps: coating the surface of an ion solvated polymer nanofiber membrane with an anion exchange membrane type polymer solution, filling pores in the membrane with the anion exchange membrane type polymer solution, and then sequentially carrying out a cross-linking reaction, a quaternization reaction and an anion exchange reaction to prepare the composite alkaline ionic membrane; the alkaline ionic membrane is applied to alkaline electrolysis of water for hydrogen production, alkaline fuel cells, carbon dioxide conversion or electrochemical synthesis of ammonia. The composite alkaline ionic membrane disclosed by the invention has excellent ionic conductivity and mechanical strength; the preparation method is simple and feasible; the application range is wide.

The present invention relates to a poly (arylpiperidinium) copolymer ionomer which does not have an aryl ester bond in a polymer backbone and has a branched piperidinium group introduced into a repeating unit, thereby having excellent chemical stability, excellent mechanical properties, and excellent mechanical properties. And meanwhile, the polymer has the advantages of high molecular weight, low swelling ratio, high dimensional stability, high ionic conductivity and limited phenyl adsorption effect. Furthermore, the anion exchange membrane prepared from the branched poly (arylpiperidinium) copolymer ionomer can be operated under low humidity conditions and is excellent in water management, 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.

The invention provides a method and a system for establishing an alkaline fuel cell model considering gas and liquid phases. The method comprises the following steps: dividing an alkaline fuel cell into nine computational domains, namely a cathode / anode plate, a cathode / anode runner, a cathode / anode diffusion layer, a cathode / anode catalyst layer and a diaphragm; respectively establishing an electrochemical model for each computational domain of the alkaline fuel cell, wherein the electrochemical model comprises an electron potential conservation equation and an ion potential conservation equation; establishing a flow field model which comprises a gas phase mass conservation equation, a gas phase momentum conservation equation, a gas phase component conservation equation and a liquid water conservation equation; establishing a temperature field model including an energy conservation equation; setting the operation boundary conditions of the alkaline fuel cell, wherein the operation boundary conditions comprise anode and cathode inlet gas mole fractions, mass flow, temperature and output voltage. According to the three-dimensional multi-physical field model establishing method of the alkaline fuel cell considering the gas phase and the liquid phase, provided by the invention, based on the working principle of the alkaline fuel cell, a modeling method can be provided for characteristic research of the alkaline fuel cell.

The invention belongs to the technical field of alkaline anion exchange membranes, and discloses an aryl piperidine anion exchange membrane containing electron-rich branched monomers, and a preparation method and application thereof. The preparation method comprises the following steps: firstly, introducing an electron-rich branched monomer to copolymerize with aryl piperidine, then directly taking a piperidine ring of N-methyl-4-piperidone as a grafting site to carry out quaternization on a polymer to obtain a membrane material, and preparing the membrane. The introduced branched monomer can play a role in enriching ion clusters, the ionic conductivity of the polymer can be improved, meanwhile, the branched monomer rich in pi electrons is contained, the pi-pi conjugation effect of the polymer can be enhanced, the swelling rate of the polymer can be reduced, and the polymer can be applied to alkaline fuel cells and alkaline electrolyzed water.

This invention provides a side-chain quinine polymer, its preparation method, and its application in the preparation of anion exchange membranes, belonging to the fields of fuel cells and water electrolysis for hydrogen production. First, an aromatic monomer, a functional monomer, and a quinine monomer are synthesized into a quinine polymer with good alkali resistance via a superacid-catalyzed condensation reaction. Second, a side-chain quinine polymer is prepared based on the synthesized quinine polymer. Finally, the side-chain quinine polymer is used as the main chain polymer for casting, and a high-performance all-carbon chain anion exchange membrane is obtained through side-chain grafting modification. The alkaline anion exchange membrane prepared by this invention exhibits excellent chemical stability, ionic conductivity, and mechanical properties, demonstrating superior overall performance. It can be applied in alkaline fuel cells, water electrolysis, energy storage batteries, carbon dioxide conversion, electrodialysis, and other electrochemical device fields.

Provided in the present invention are a polyaryl isatin-based cationic polymer, a preparation method therefor, and the use thereof. The cationic polymer is a novel polyaryl isatin scaffold synthesized by a Friedel-Crafts polycondensation reaction under the catalysis of a superacid. An isatin structural unit in the cationic polymer possesses a very large molecular volume, which can improve the dimensional stability and mechanical properties of the cationic polymer after film formation; in addition, the N site of a cation grafted onto the cationic polymer is located on the para-position of the isatin structural unit, and such a remote grafting strategy can further improve the alkali resistance stability of the cation in the film. Therefore, the cationic polymer of the present invention exhibits extremely high ionic conductivity and mechanical and chemical stability, and can thus be used as an anion exchange membrane or an anion exchange polymer adhesive for alkaline water electrolysis, alkaline fuel cells, carbon dioxide reduction and flow batteries.

The invention belongs to the technical field of fuel cell catalysts, and particularly discloses an iron and nitrogen co-doped carbon oxygen reduction catalyst with a hierarchical porous structure as well as a preparation method and application of the iron and nitrogen co-doped carbon oxygen reduction catalyst. The iron and nitrogen co-doped carbon oxygen reduction catalyst is prepared by taking ZnO / N / C-coated Fe-ZIF with a core-shell structure as a precursor, is of a rhombic dodecahedron structure and has a micropore-mesopore coexisting hierarchical porous structure, and the particle size of metal iron particles is 5-10 nm. The invention also discloses an application of the catalyst in a cathode oxygen reduction reaction of an alkaline fuel cell. The iron and nitrogen co-doped carbon oxygen reduction catalyst provided by the invention can avoid metal particle agglomeration, forms highly exposed and easily accessible active sites, and significantly improves the oxygen reduction catalytic activity.

The invention provides a polyaralkyl alkaline anion exchange membrane and a preparation method thereof, a water electrolyser and an alkaline fuel cell, and relates to the field of materials. The structural general formula of the polyaralkyl alkaline anion exchange membrane is shown in the specification. The polyaralkyl alkaline anion exchange membrane provided by the invention has good dimensional stability and relatively high ionic conductivity.

The invention relates to the technical field of battery testing, in particular to an alkaline fuel cell testing device which comprises a to-be-tested single battery, a gas assembly and a liquid circulation assembly, the to-be-tested single battery is electrically connected with an external electronic load, and the to-be-tested single battery is fixedly connected and communicated with the gas assembly; the gas assembly is used for leading in or leading out reaction gas to the to-be-tested single battery, the to-be-tested single battery is fixedly connected and communicated with the liquid circulation assembly, and the liquid circulation assembly is used for leading in or leading out alkaline electrolyte to the to-be-tested single battery. According to the alkaline fuel cell testing device, the gas assembly and the liquid circulation assembly are simple in structure, the alkaline fuel cell testing device has the advantages of being easy to machine, low in manufacturing cost and convenient to use, the operation environment of the to-be-tested single cell can be fully simulated, the performance of the to-be-tested single cell can be accurately and effectively tested, and testing is flexible and rapid. And moreover, the to-be-tested single battery is simple to replace, different test single batteries can be tested, and the application range is wide.

The invention relates to a preparation method and application of an alkaline palladium ruthenium hydroxide-cerium oxide electrocatalyst with a high-activity and wide-potential stability window. According to the preparation method, the non-platinum carbon-loaded ruthenium-based alloy is successfully prepared by adopting a wet chemical reduction and annealing combined method, and uniform dispersion of metal nanoparticles is realized. The palladium ruthenium-cerium oxide electrocatalyst prepared by the invention is small in particle size, uniform in dispersity and relatively high in current density and mass ratio activity, the problem of inactivation caused by over-oxidation of the ruthenium-based electrocatalyst under relatively high potential is also greatly improved, and the palladium ruthenium-cerium oxide electrocatalyst is suitable for an oxidation reaction of hydrogen at an anode side of an alkaline fuel cell.

The invention discloses a high-conductivity alkaline anion exchange membrane and a preparation method thereof, the high-conductivity alkaline anion exchange membrane is prepared from a rigid aromatic monomer, reactive quaternized polyarylether sulfone, immobilized quaternary ammonium salt, hydrophobic mesoporous SiO2 and a cross-linking agent, and the surface of the high-conductivity alkaline anion exchange membrane is provided with a cation density gradient transition layer and an anti-corrosion coating. The alkali-resistant stability of the membrane is improved through covalent bonding of quaternary ammonium and a three-dimensional cross-linked structure, the mesoporous SiO2 regulates swelling and constructs an ion channel, and the interface contact resistance is reduced through a gradient structure. And the OH <-> conductivity at 80 DEG C reaches 149-168 mS / cm, the 4000 h alkali-resistant retention rate is greater than or equal to 90%, the in-plane swelling rate is less than or equal to 5.1%, the interface contact resistance is as low as 0.08 omega.cm < 2 >, and the composite material has the advantages of high conductivity, low swelling, high alkali resistance and excellent interface compatibility, and is suitable for alkaline fuel cells.

The present invention relates to a technology for synthesizing a poly(spirobisindane-arylpiperidinium) copolymer having no aryl ether bond in the polymer backbone, containing a spirobisindane group in the repeating unit, and introducing a piperidinium group, and for producing an anion exchange membrane from the copolymer. The novel poly(spirobisindane-arylpiperidinium) copolymer ionomer according to the present invention has excellent chemical stability and mechanical properties, high ion conductivity, improved gas permeability, and reduced mass transfer resistance. In addition, the anion exchange membrane and composite membrane produced from the poly(spirobisindane-arylpiperidinium) copolymer ionomer have excellent chemical stability, mechanical properties, durability, and water management ability, and can be applied to membranes and binders for alkaline fuel cells, water electrolysis devices, carbon dioxide reduction devices, metal-air batteries, etc.

A fuel cell catalyst, including: one or more substantially monodisperse nanocrystals, wherein the one or more substantially monodisperse nanocrystals include an octahedral morphology or nanocrystal geometry including eight exclusively exposed {101} facets. In embodiments, a cathode including the fuel cell catalyst is also provided, including methods of making the fuel cell catalyst.

The application belongs to the technical field of anion exchange membranes, and discloses an oxygen-containing fluorene polyarylpiperidine type anion exchange membrane and a preparation method thereof. A piperidine type trimonomer polymer with good alkali stability and mechanical properties is synthesized, the main chain structure of the polymer is controlled by controlling the feeding proportion of monomers, the polymer is reacted with iodomethane to obtain a quaternary ammonium polymer, and the quaternary ammonium polymer is used for casting a film. The prepared membrane has good dimensional stability and good ion conductivity, has good alkali stability and mechanical strength, and can be applied to alkaline fuel cells and alkaline water electrolysis.

The invention provides a cationic polymer based on polyaryl isatin as well as a preparation method and application of the cationic polymer. The cationic polymer is a novel polyaryl isatin skeleton synthesized through Friedel-Crafts condensation polymerization under the catalysis of superacid; the isatin structural unit in the cationic polymer has a huge molecular volume so as to improve the dimensional stability and mechanical property of the cationic polymer after film formation, and meanwhile, the N site of the grafted cation on the cationic polymer is positioned on the para-position of the isatin structural unit; the remote grafting strategy can further improve the cation alkali-resistant stability of the membrane, so that the cationic polymer disclosed by the invention shows very high ionic conductivity and mechanical and chemical stability; the polymer can be used as an anion exchange membrane or an anion exchange polymer binder for alkaline electrolyzed water, alkaline fuel cells, carbon dioxide reduction and flow batteries.

This invention discloses a polyarylalkyl crosslinked modified polybenzimidazole anion exchange membrane, its preparation method, and its applications. By crosslinking modified polybenzimidazole with long alkyl side chain ion-conducting groups with a polyarylalkyl polymer having haloalkyl side chains and then casting the mixture, a high-performance anion exchange membrane with a clearly defined hydrophilic / hydrophobic microphase separation structure is designed. The prepared membrane exhibits good dimensional stability and high ionic conductivity, and can be applied in anion exchange membrane water electrolyzers and alkaline fuel cells.

The invention belongs to the technical field of water electrolysis hydrogen production and fuel cells, and discloses a polymer based on a Trgers Base short chain, a preparation method of the polymer, an anion exchange membrane of the polymer and application of the anion exchange membrane. In particular to a composite anion exchange membrane (AEMs) developed through crosslinking of a Trgers Base (TB) polymer and a poly (aryl piperidinium) (PAPs) cationic polymer and crosslinking or grafting of a TB chain on a main chain of poly (aryl olefin) (PAAs), and application of the composite anion exchange membrane in an alkaline fuel cell or an alkaline fuel cell. These films have a mechanical strength of 40 to 50 MPa, a current density of 1.0 to 1.15 + / -0.5 A / cm at a voltage of 2.0 V at 60 DEG C, and a voltage attenuation of 1.8 to 1.85 V at a current density of 0.8 A / cm at 60 DEG C.

This invention provides a square atmospheric pressure alkaline fuel cell stack, relating to the field of fuel cell technology. It comprises, from top to bottom, an upper end plate, an electrical cover plate, an upper current collector, an upper bipolar plate, an upper catalytic electrode, a composite porous membrane, a lower catalytic electrode, a lower bipolar plate, a lower current collector, and a lower end plate, stacked sequentially. The upper and lower end plates are fastened together as an integrated square structure by tie rods along their edges. This invention employs an electrode and membrane design without through-holes and precise planar sealing between layers. It eliminates the need for high-pressure operating conditions and complex circulation systems. Through a non-precious metal catalytic system, it achieves stable power generation under atmospheric pressure. Its core structure avoids cross-leakage of the medium, reduces component processing and operating costs, simplifies the system structure, and is suitable for applications such as distributed energy and miniaturized equipment. It solves the technical pain points of unreliable sealing, complex structure, and high cost of traditional fuel cell stacks, contributing to the efficient utilization of hydrogen energy and possessing broad industrial application prospects.

The application discloses a kind of containing azulene group polysulfone anion exchange membrane and preparation method and application thereof, belong to membrane technical field.The application is prepared by polymerization and quaternary ammonium reaction, a series of novel alkali-resistant, high-temperature-resistant basic anion exchange membrane.The polysulfone and its crosslinked polymer have high mechanical strength and thermal stability, which greatly reduces the water absorption and expansion ratio of anion exchange membrane, thereby improving the dimensional stability;Meanwhile, high stability cation group and nucleophilic azulene group functional group increase its basic stability.Its high OH ‑ The high OH conductivity, basic stability and high mechanical strength show that the azulene group polysulfone anion exchange membrane of the application can be used as an anion exchange membrane material for basic fuel cells and basic electrolytic cells.

The invention discloses an azulene-containing polysulfone anion exchange membrane as well as a preparation method and application thereof, and belongs to the technical field of membranes. A series of novel alkali-resistant and high-temperature-resistant alkaline anion exchange membranes are prepared through polymerization and quaternization reactions. The polysulfone and the cross-linked polymer thereof have high mechanical strength and thermal stability, so that the water absorption and the expansion ratio of the anion exchange membrane are greatly reduced, and the dimensional stability is improved; meanwhile, the high-stability cationic group and the nucleophilic azulenyl functional group increase the alkaline stability of the compound. The high OH <-> conductivity, alkaline stability and high mechanical strength of the azulene-based polysulfone anion exchange membrane show that the azulene-based polysulfone anion exchange membrane can be used as an anion exchange membrane material for an alkaline fuel cell and an alkaline electrolytic tank.

A novel polyfluorene-based ionomer, an anion exchange membrane, a method for preparing the polyfluorene-based ionomer, and a method for fabricating the anion exchange membrane are proposed. The polyfluorene-based ionomer contains no aryl ether bonds in the polymer backbone and includes piperidinium groups incorporated into the repeating units. The anion exchange membrane is fabricated from the polyfluorene-based ionomer. The anion exchange membrane has good thermal and chemical stability, excellent mechanical properties, and high ion conductivity. Due to these advantages, the anion exchange membrane can be applied as a membrane for an alkaline fuel cell and to a binder for an alkaline fuel cell or water electrolysis.

The application discloses a preparation method and application of a polyazulene sulfide, relates to the technical field of membranes, and comprises the following steps: preparing a polyazulene sulfide polymer; and preparing a polyazulene sulfide anion exchange membrane. Thus, a basic anion exchange membrane is prepared through polymerization and quaternization, wherein a strong dipole moment azulene group and a sulfur-containing main chain promote the formation of a strengthened hydrogen bond network, promote the high-speed transmission of OH ‑ , a branched structure generates high mechanical strength, greatly reduces the water absorption and swelling rate of the anion exchange membrane, and thus improves the dimensional stability; meanwhile, high-stability cation groups and nucleophilic azulene groups increase the basic stability, the high OH ‑ conductivity, the basic stability and the high mechanical strength indicate that the prepared polyazulene sulfide anion exchange membrane can be used as an anion exchange membrane material for a basic fuel cell and a basic electrolytic cell.

The invention belongs to the technical field of alkaline fuel cells, and discloses a high-stability ruthenium / carbon composite hydrogen oxidation electrocatalyst and a preparation method thereof. The preparation method of the catalyst comprises two main steps: firstly, modifying the surface of carbon black with polydopamine (PDA), then dispersing the active component ruthenium onto the surface of the modified carbon black through the polydopamine (PDA), and carrying out thermal annealing treatment to obtain the catalyst. According to the material preparation method provided by the invention, ruthenium active sites in an electron-deficient state can be constructed on the surface of the carbon substrate, and the sites can weaken excessive adsorption of ruthenium to a reaction intermediate, so that a catalyst is prevented from being inactivated due to passivation in a reaction process. The prepared ruthenium / carbon composite electrocatalyst shows extremely high hydrogen oxidation (HOR) activity and excellent stability under an alkaline condition, and still retains catalytic activity when the overpotential reaches 0.9 V (vs.RHE).

The present invention relates to the technical field of membranes, and discloses an azulenyl-branched poly(aryl-piperidine) anion exchange membrane, and a preparation method therefor and the use thereof. The specific preparation method comprises: preparing an azulenyl-branched poly(aryl-piperidine) precursor; preparing cationized azulenyl-branched poly(aryl-piperidine); and preparing an azulenyl-branched poly(aryl-piperidine) anion exchange membrane. In this way, an alkaline anion exchange membrane is prepared by means of polymerization and quaternization, wherein a branched structure generates high mechanical strength and greatly reduces the water absorption and swelling rate of the anion exchange membrane, thereby improving the dimensional stability; moreover, a highly stable cationic group and a nucleophilic azulenyl group increase the alkaline stability thereof. The high OH- electrical conductivity, alkaline stability and high mechanical strength thereof indicate that the azulenyl-branched poly(aryl-piperidine) anion exchange membrane prepared by the method can be used as an anion exchange membrane material for alkaline fuel cells and alkaline electrolytic cells.

The application discloses an olefin-based tertiary amine monomer for a crosslinked anion exchange membrane and a preparation method and application thereof. The monomer structure is shown in a general formula: (R a)(R b)N-R c, wherein R a and R b are each independently selected from an alkyl group, an aryl group, a heterocyclic group or an alkenyl group, R c is a group containing at least one alkenyl group, and at least two groups of R a, R b and R c each contain at least one alkenyl group. The preparation method comprises the following steps: halogenating a tertiary alcohol amine to obtain a halogenated tertiary amine, and then reacting the halogenated tertiary amine with a Grignard reagent prepared from a halogenated olefin to obtain the target monomer. The monomer contains multiple alkenyl groups and tertiary amine groups in the molecule, can be used as a precursor with polymerizable and ionizable functions, and is used for preparing an anion exchange membrane with a three-dimensional network crosslinked structure. The raw material is easy to obtain, the synthesis route is simple, the product structure is adjustable, the prepared anion exchange membrane has high ionic conductivity, excellent dimensional stability and alkali resistance, and is suitable for alkaline fuel cells, water electrolysis hydrogen production and other electrochemical devices.

Anion-exchange membranes are useful for electro-membrane processes such as electrodialysis (water desalination, separation of inorganics from organic molecules, separation of specific inorganic ion, etc.), in-situ ion-exchange and ion substitution, electro-deionization for producing ultrapure water, polymer electrolyte membrane for alkaline fuel cell and electrolysis applications. The present invention discloses an acid and base resistant fluorinated hydrocarbon based anion-exchange membrane and its method of preparation thereof. In the first step co-polymerization is carried out between N-isopropylacrylamide and 1-vinylimidazole. In the second step, obtained inter-polymer of isopropylacrylamide-co-vinylimidazole co-polymer is mixed with poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-co-HFP) (IA-co-VI / PVDF-co-HFP), which is used for casting membrane film of desired thickness. The obtained casted membrane thin film is quaternized in methyl iodide solution.

The invention provides a polynorbornene interpenetrating polymer network cross-linked anion exchange membrane as well as a preparation method and application thereof. According to the invention, the polynorbornene-based interpenetrating polymer network cross-linked anion exchange membrane is prepared from polynorbornene, allylphenol quaternary ammonium salt and polythiol under the irradiation condition of an ultraviolet lamp. The polynorbornene-based interpenetrating polymer network cross-linked anion exchange membrane has a smooth and transparent surface, has excellent conductivity, stability and mechanical properties, overcomes the problem of tradeoff between conductivity and stability of a common AEM, and can be applied to alkaline fuel cell equipment, alkaline electrolyzed water equipment, electrodialysis equipment, waste acid recovery equipment, carbon dioxide reduction equipment and the like.

A method was developed for producing catalytic ink with a pore-forming agent for depositing the catalytic layer onto diffusers, membranes, or any other substrate for electrode formation. This method employs carbon-supported metallic nanoparticles (of various types), powdered ionomer, a pore generator, and a mixture of different solvents. The catalytic ink is homogenized using ultrasound and deposited by an atomization system. This process is used to manufacture membrane-electrode assemblies for use in alkaline fuel cell technology.

This invention relates to a composite alkaline ion-exchange membrane, its preparation method, and its applications. The composite alkaline ion-exchange membrane is obtained by anion exchange of a composite membrane composed of a quaternized anion-exchange membrane polymer and an ion-solubilized polymer nanofiber membrane. The quaternized anion-exchange membrane polymer is distributed on the surface and in the pores of the ion-solubilized polymer nanofiber membrane, and the two are covalently bonded together. The preparation method involves coating the surface of the ion-solubilized polymer nanofiber membrane with an anion-exchange membrane polymer solution and filling the pores of the membrane, followed by a crosslinking reaction, a quaternization reaction, and an anion exchange reaction to obtain the composite alkaline ion-exchange membrane. Its applications include using it as an alkaline ion-exchange membrane in alkaline water electrolysis for hydrogen production, alkaline fuel cells, carbon dioxide conversion, or electrochemical ammonia synthesis. The composite alkaline ion-exchange membrane of this invention possesses both excellent ionic conductivity and mechanical strength; the preparation method is simple and easy to implement; and it has a wide range of applications.