133results about How to "High proton conductivity" patented technology

A film electrode used on proton exchange film fuel cell consists of five layers as middle layer of total F proton exchange film, two external layers of catalytic layers and two layers of diffusion layers outside of two external layers. Its preparing method includes embedding nanofibre proton conductor network in catalytic layer, preparing a layer of nanofibre proton conductor multiple film on total F proton exchange film surface by static spinning technique, coating ink containing catalyst in proton conductor fibre, drying and heat rolling to obtain film electrode containing nanofibre proton conductor network in catalytic layer.

To provide an inexpensive electrolyte membrane that can be used in electrochemical device applications such as a solid polymer type fuel cell, has high proton conductivity, has excellent performance in preventing permeation of methanol when used in a DMFC, and has excellent durability when operated as a fuel cell.An electrolyte membrane comprising a crosslinked electrolyte polymer comprising as essential constituent monomers (a) a compound having a polymerizable carbon-carbon double bond and a sulfonic acid group in one molecule, or a salt thereof, and (b) a (meth)acrylamide derivative represented by a specific structural formula.

The invention relates to a preparation method of a covalent-ion cross-linked film of sulfonated polyimide containing imidazolyl. The preparation method comprises the following steps: 1, 4, 5, 8-naphthoic tetracarboxylic dianhydride, sulfonated diamine, common non-sulfonated diamine and diamine containing imidazolyl are added into a metacresol medium, the sulfonated polyimide containing imidazolyl is obtained by copolycondensation under the presence of triethylamine and benzoic acid and the protection of nitrogen; a solution casting method and proton exchange are adopted to prepare non-covalent cross-linked sulfonated polyimide film containing imidazolyl which is then processed by methane-sulfonic acid / phosphorus pentoxide solution or phosphoric acid solution or polyphosphoric acid containing phosphorus petoxide so as to prepare the covalent-ion cross-linked film of sulfonated polyimide containing imidazolyl. The covalent-ion cross-linked film obtained by the preparation method has anti-free radical oxidation susceptibility which is far better than the common sulfonated polyimide or non-covalent cross-linked film without containing imidazolyl and has potential application prospect in the fields of fuel cells and the like.

The invention relates to a method for preparing proton exchange membrane with polyvinylidene fluoride grafted and grafting copolymerized with 2-acrylamido-2-methylpropanesulfonic acid, which belongs to the field of battery electrolyte material. The method comprises: dissolving a silicon compound in water-containing N-methyl pyrrolidone solution; adding polyvinylidene fluoride PVDF and 2-acrylamido-2-methylpropanesulfonic acid (AMPS) to the solution; adding initiator; heating and stirring; casting the solution onto a clean glass plate; drying the obtained product; and removing membrane to obtain graft copolymer membrane with modified PVDF and 2-acrylamido-2-methylpropanesulfonic acid. The proton exchange membrane prepared by the method not only has good proton-conducting pieces, but also is convenient for mass production.

The present invention relates to polymer blend membranes of sulfonated and nonsulfonated polysulfones, methods for the preparation the membrane, and fuel cells comprising the same. The blend membranes can be obtained by varying drying condition and concentration of casting solution. The membranes have improved methanol barrier property, proton conductivity and membrane selectivity.

The invention discloses a preparation method for a flexible inorganic / organic composite proton exchange membrane. The method comprises the following steps: 1, dissolving a proton conducting polymer in an organic solvent or water so as to obtain a proton conducting polymer solution; 2, mixing an inorganic proton conducting material or an inorganic proton conducting material containing organic components with the proton conducting polymer solution for mechanical ball milling so as to obtain a mixture in which the inorganic proton conducting material or the inorganic proton conducting material containing organic components disperses in the proton conducting polymer solution; 3, pouring the mixture on a substrate, and allowing the solvent to volatilize and the mixture to solidify so as to prepare the flexible inorganic / organic composite proton exchange membrane. The flexible inorganic / organic composite proton exchange membrane prepared in the invention has the characteristics of proton conducting capacity, flexibility, stable dimension, heat resistance and mechanical strength at a certain degree, and can be used in the field of fuel cells and related fields in need of proton exchange membranes like all-vanadium redox flow batteries, industrial electrolysis of chlor-alkali, super capacitors and sensors.

The invention belongs to the technical field of fuel cells, and in particular discloses a preparation method of an organic-inorganic composite proton exchange membrane for a fuel cell. The preparation method comprises the following steps of: oxidating a carbon nano tube first, then preparing the carbon nano tube coated by silicon dioxide by using a sol-gel method, and mixing dispersion liquid of the carbon nano tube coated by silicon dioxide with dispersion liquid of sulfonated polymers to prepare a solution casting membrane. The prepared composite proton exchange membrane has high water-absorbing performance and high alcohol resistant performance.

The present invention belongs to the field of functional polymer material and electrochemical technology, and is especially one kind of medium temperature protonic conducting material based on hydrophilic carbon nanotube and sulfonic group-containing polymer and its preparation process. The present invention features that sulfonic group-containing polymer and hydrophilic carbon nanotube are combined to obtain protonic conducting film material with water keeping capacity raised both chemically and structurally. The prepared protonic conducting film material has high protonic conducting performance even in the temperature over the boiling point of water, and may be used in proton exchanging film and film electrode in medium temperature fuel cell.

The invention discloses a polyacid-based metal organic frame proton conductor material of inorganic acid molecule functionalization. Polyanions and crystal water molecules are domain-limited in pore canals of the metal organic frame, wherein the structure thereof is HAaPOM-MOF, wherein HA is one of H2SO4 or H3PO4; and POM-MOF is the polyacid-based metal organic frame, and is one of [Ag8L5](PMo12O40)(H2O)10 or [Ag8L5](PW12O40)(H2O)13, wherein L is 5-phenyl tetrazole. The invention further discloses a preparation method for the polyacid-based metal organic frame proton conductor material of the inorganic acid molecule functionalization. The preparation method comprises the following steps: firstly preparing the polyacid-based metal organic frame, uniformly mixing the prepared polyacid-based metal organic frame and HA solution, separating the material, washing, drying to obtain the polyacid-based metal organic frame proton conductor material of the inorganic acid molecule functionalization.

The invention relates to the field of alkaline redox flow battery energy storage, in particular to a preparation method of an ion exchange membrane for an alkaline redox flow battery, which is mainlyused for solving the problem of the high price of a Nafion diaphragm in the alkaline redox flow battery at the present stage, so that the cost of the redox flow battery is greatly reduced. An alkalineaqueous solution of ferricyanide (such as Na3[Fe(CN)6], K3[Fe(CN)6], (NH4)3[Fe(CN)6] and the like) is used as a positive electrolyte, and a strong alkaline solution (such as KOH, NaOH and the like) is used as a negative electrolyte; graphite felt and carbon felt are selected as positive electrode materials, and a zinc plate is selected as a negative electrode material; and the ionized sulfonatedpolyether ether ketone (SPEEK) diaphragm is used as an ion exchange membrane to assemble the battery. Therefore, the alkaline redox flow battery system with low cost and high performance is obtained.The flow battery system provided by the invention has the advantages of the high open-circuit voltage, the low cost, the high efficiency, the good cycling stability, safety, reliability and the like,and has a wide application prospect.

Processes for controlled sulfonation of a polyaryletherketone comprise reacting a monomer of formula VIII with a monomer of formula IX to form a polyaryletherketone; and sulfonating the polyaryletherketone to form a sulfonated polyaryletherketone comprising structural units of formula IV wherein R1 is halogen, C1-C10 alkyl, C3-C12 cycloalkyl, or C3-C15 aryl; a is an integer from 0 to 4; Y is F, Cl, Br or a mixture thereof; m is 0 or 1; and Q is H, a metal cation, a non-metallic inorganic cation, an organic cation or a mixture thereof.

The invention discloses an acid modified metal-organic framework material. The material is obtained by modifying a metal-organic framework material M-MOF-74 with an acidic solution, wherein M is Ni, Zn or Co, and the acidic solution is one or more of sulfuric acid, phosphoric acid and hydrochloric acid. The preparation method comprises the following steps: reacting transition metal acetate with 2,5-dihydroxyterephthalic acid to form the metal-organic framework material M-MOF-74, and adding the metal-organic framework material M-MOF-74 to the acidic solution in order to carry out acid modification in order to obtain the acid modified metal-organic framework material H<+>@M-MOF-74. The proton conductivity of the acid-modified metal-organic framework material H<+>@M-MOF-74 prepared by the method is 50-150 times higher than that of an unmodified material; and the preparation method has the advantages of low production cost, high preparation efficiency, simplicity in operation, and easinessin achieving industrialization, and is expected to become an ideal fuel cell electrolyte material.

The invention provides a high and low temperature general polysiloxane phosphonate doped SPEEK proton exchange membrane and a preparation method of the proton exchange membrane. The proton exchange membrane is prepared by performing cross-linking in an SPEEK matrix to form polysiloxane phosphonate doped SPEEK collosol after a ring-opening reaction of organic phosphonic acid and siloxane, and performing ageing, drying and heat treatment on the collosol. According to the proton exchange membrane, protons are conducted by proton conduction units with different ingredients at different temperatures and humidity, so that the membrane can exert good proton conductivity at the medium and low temperature and the high temperature and low humidity, and even under an anhydrous condition. The prepared membrane has good mechanical property and thermochemistry stability and effectively reduces methanol transmittance at the same time.

The invention provides a composite proton exchange membrane and a preparation method thereof, and relates to the field of fuel cells. The preparation method of the composite proton exchange membrane comprises the steps of preparing carbon nanotubes coated with sulfurated zirconia into dispersion liquid, mixing the dispersion liquid with an acid solution of chitosan, and drying to obtain a dry film; carrying out alkaline cleaning on the dry film, and then washing until the dry film is neutral; obtaining the composite proton exchange membrane under the action of a cross-linking agent. The prepared composite proton exchange membrane has good water absorption, proton conductivity, mechanical properties and thermal stability, thus having a wide application prospect in polymer-based fuel cells.

The invention discloses side-chained sulfonated polyimide of which a main chain contains quinoxaline perssad, a preparing method of side-chained sulfonated polyimide, and a method for applying side-chained sulfonated polyimide to prepare a protocol exchange membrane. Side-chained sulfonated polyimide is structurally characterized in that the main chain contains the quinoxaline perssad, and ether bonds or thioether bonds on side-chained sulfonated polyimide serve as connection perssad of a side chain, the flexibility of the side chain and the hydrophobicity of the main chain are guaranteed, andmeanwhile, side-chained sulfonated polyimide has high molecular weight, excellent heat stability and high hydrolytic stability. The preparing technology is simple, the reaction condition is easy to operate and control, and side-chained sulfonated polyimide is applicable to industrialized production. The protocol exchange membrane which is prepared through side-chained sulfonated polyimide of which the main chain contains the quinoxaline perssad has high protonic electric conductivity and excellent mechanical performance, and has a good application prospect.

The invention relates to the technical field of new energy material development, in particular to a preparation method and application of an MOF material with adjustable proton conduction performance.Organic ligands containing acidic groups and basic groups are introduced into a synthesis solution at the same time, and the MOF material modified with the acidic groups and the basic groups at the same time is synthesized in one step through a solvent replacement method. The proton conduction performance of the MOF material can be further regulated and controlled by changing the concentrations and proportions of acidic groups and basic groups in the MOF material. A one-step synthesis method is adopted, the synthesis reaction steps are simple, the reaction is sufficient, and acid groups and basic groups of the synthesized product are uniformly distributed. Protons jumping in the hydrogen bond network are evenly distributed at intervals through even distribution of the acid groups, jumpingnodes of the protons in the hydrogen bond network are evenly distributed through even distribution of the basic groups at intervals, and therefore even distribution of proton conduction active sitesof the material is guaranteed, and the proton conductivity of the MOF material is effectively improved.

The invention belongs to the field of preparation of ionic hydrogen bond organic framework materials, and particularly discloses an ionic hydrogen bond organic framework material with proton conduction performance, the chemical formula of the ionic hydrogen bond organic framework material is {TPE-SO3H. 2 (DBD). 2 (DMF). 4 (H2O)} n, n is a positive integer, TPE-SO3H is 1, 1, 2, 2-tetrasulfonic acidphenyl ethylene, DBD is (C5NH4NH2) 22+, and DMF is N, N '-dimethylformamide. The structural unit belongs to a triclinic system, the space group is P-1, the molecular formula is C52H62N10O18S4, the cell parameters are as follows: alpha = 102.789 degrees, beta = 99.968 degrees and gamma = 112.169 degrees, each repetitive unit comprises four water molecules and two DMF molecules, two DBD molecules and one TPE-SO3H molecule, and amino groups on the DBD molecules and sulfonate groups on the TPE-SO3H molecule form a one-dimensional hydrogen bond network with water molecules. The material has good thermal stability, and has good performance for proton transportation. The invention discloses the preparation method of the material, the synthetic raw materials are easy to obtain, and the preparation process is simple. The ionic hydrogen bond organic framework material disclosed by the invention can be used as a proton conducting material and has a very good application prospect.

The invention discloses a preparation method of an organic / inorganic composite intermediate / high-temperature proton conductive membrane. The preparation method comprises the following steps of: (1) mixing perfluorinated sulfonic acid resin, a mesoporous silica particle, and a solvent at a mass ratio of 100:(5-70):(100-2000) to obtain a suspension; (2) casting the suspension on a smooth and flat substrate to obtain a membrane by curing; (3) soaking the membrane in an ionic liquid to cause the membrane to adsorb the ionic liquid, wherein the mass of the ionic liquid adsorbed into the membrane is 10-80% of that of the perfluorinated sulfonic acid resin; and (4) removing the ionic liquid on the surface of the membrane adsorbed with the ionic liquid to obtain the organic / inorganic composite intermediate / high-temperature proton conductive membrane. The organic / inorganic composite intermediate / high-temperature proton conductive membrane prepared by the method disclosed by the invention has the advantages of high mechanical strength and good intermediate / high-temperature proton conductivity, the intermediate / high-temperature proton conductivity is more than 10<-3>S / cm, the tensile strength is higher than 6.0MPam and the preparation method facilitates wide application of the intermediate / high-temperature proton conductive membrane to the fields of fuel cell, catalysis, sensors and the like.

The present invention uses industrial polystyrene as raw material, under the protection of inert gas uses complex of acidylating agent and concentrated sulfuric acid as sulfonating agent to make sulfonation, and utilizes dector-blade casting process or other membrane-forming process to prepare polystyrene sulfoacid membrane with low sulfonation degree. Said invention utilizes the control of sulfonation extent of polystyrene sulfoacid membrane and distribution of sulfoacid group to implement modification or polystyrene sulfoacid membrane, on the primise of that the protein conductivity of the membrane is not affected, the permeability of the methyl alcohol in the membrane is reduced, and the alcohol-resistance of membrane material is raised. It can be used as new type protein exchange membrane of two-temp. direct methyl alcohol fuel cell.

The invention discloses an inorganic / organic alternation type composite proton exchange membrane and a preparation method thereof. The method specifically comprises the steps of preparing sol containing inorganic proton conductive components by a sol-gel process; adding the sol into a solution containing organic polymer components to uniformly mix the inorganic components with the organic components; performing condensation polymerization to obtain a net structure with mutually alternated inorganic / organic molecules. In the method disclosed by the invention, an inorganic / organic alternation type composite proton exchange membrane is prepared by a mode of solution blending first and condensation polymerization later; compared with the mode of adding inorganic components into an organic matter in a form of powder, the inorganic and organic components are distributed more uniformly in a three-dimensional space. The composite proton exchange membrane prepared by the method disclosed by the invention integrates the proton conductivity, toughness, dimensional stability, heat resistance and good mechanical strength, and is expected to be widely applied to the fields such as fuel cells, all vanadium flow batteries, chlorine alkali industry electrolysis, super-capacitors, sensors and the like.

The invention discloses a mixed conductor hydrogen permeation membrane containing Zr system and Tm system perovskite and a preparation method and an application thereof; the chemical formula of the hydrogen permeation membrane is SrCe0.95-xZrxTm0.05O3-delta; wherein, x is not less than 0.1 and not more than 0.40 and delta is not less than 0 and not more than 0.5. The preparation method comprises the following steps: preparing a precursor by EDTA-citric acid combination complexometry, sintering at 1000 DEG C for 7-10h to obtain powder, pressing the powder at 10-40MPa to obtain membranes by stationary method and finally roasting the membranes at 1100-1525 DEG C to obtain the mixed conductor hydrogen permeation membrane containing Zr system and Tm system perovskite. The hydrogen permeation membrane is perovskite oxide which is doped with Zr and Tm at the same time, has higher hydrogen permeability and high stability in reducing atmosphere and can be used for separating hydrogen from a mixed gas containing hydrogen.

The invention relates to a preparation method of a silicotungstic acid / silicon dioxide polyvinyl alcohol proton exchange membrane, belonging to the field of battery electrolyte materials. The preparation method comprises the following steps of: firstly solving the polyvinyl alcohol in deionized water to prepare a macromolecular solution, adding silicon compounds and sodium tungstate to the prepared solution, heating and mixing to form a solution, pouring the solution on a polytetrafluoroethylene glass plate and drying to form a membrane, and then obtaining the required silicotungstic acid / silicon dioxide polyvinyl alcohol proton exchange membrane. The prepared proton exchange membrane has great proton conductivity and low methanol permeability and is convenient for the large-scale production.

The invention belongs to the technical field of fuel cell proton exchange membranes, and particularly discloses a method for preparing a boron phosphate coated carbon nanotube composite proton exchange membrane. According to the method, sulfonated polyether ether ketone is used as the base material, and boron phosphate coated carbon nanotubes are used as the dopant, so that the membrane is prepared. The composite proton exchange membrane prepared through the method is excellent in overall performance. Moreover, the preparation technology is simple, the material cost is low, and the method can be applied to proton exchange membrane fuel cells.

The invention discloses a segmented copolymer of fully sulfonated polymide and partly sulfonated polybutadiene and a preparation method thereof. Sulfonated diamino monomer and naphthalene tetracarboxylic acid dianhydride monomer in a specific proportion are used as the raw materials to be subjected to polycondensation to obtain amino-terminated fully sulfonated polymide, and thionyl chloride is used for modifying carboxyl terminated polybutadiene to prepare chloroacyl terminated polybutadiene; the above two prepolymers react under the anhydrous condition, thus the segmented copolymer of fully sulfonated polymide and polybutadiene can be obtained; and finally acetyl sulfonic ester prepared by concentrated sulphuric acid and acetic anhydride is used for carrying out post sulfonation on the polybutadiene segment, thus preparing the segmented copolymer of the fully sulfonated polymide and partly sulfonated polybutadiene. The segmented copolymer of the invention is dissolved in an organic solvent and is coated with membranes, thus preparing proton exchange membranes applied to fuel cells. The membranes have good proton-conducting properties and mechanical properties. The segmented copolymer has extensive application prospect in the field of the proton exchange membranes applied to fuel cells.

The invention discloses sulfuryl bridge connection side chain sulfonated polyimide, a preparation method thereof and a method for preparing proton exchange membranes by applying the sulfonated polyimide. The sulfuryl bridge connection side chain sulfonated polyimide is structurally characterized in that a side chain with a sulfonic acid group is connected onto a polyimide main chain through sulfuryl serving as a bridge connection group, the sulfuryl serves as the bridge connection group, so that flexibility of the side chain and acidity of the sulfonic acid group are ensured, and an obtained polymer has high molecular weight and good hydrolytic stability. A preparation process of the sulfonated polyimide is simple and applicable to industrial production, and reaction conditions are easily operated and controlled. The proton exchange membranes prepared by the sulfuryl bridge connection side chain sulfonated polyimide have high proton conductivity and potential application prospects.

The invention discloses a vanadium cell nafion proton membrane and a preparation method thereof. The vanadium cell nafion proton membrane is prepared from a cross-linking substance of nafion resin and polyether amine. The preparation method comprises the following steps: carrying out crosslinking to hydrophilic macromolecular polyether amine and the nafion resin in a solution so as to carry out cross-linking reaction on amino groups at two ends of a hydrophilic macromolecular polyether amine molecular chain and the sulfonic acid group of the nafion resin; and volatilizing a solvent to prepare the hydrophilic cross-linking nafion proton membrane. The proton membrane disclosed by the invention has the characteristics of high compact degree, good vanadium blocking performance, high proton conductivity and high reliability, and the energy efficiency of a pile is effectively improved; and the preparation method is easy to operate and high in production efficiency, and is suitable for mass production.

The invention discloses a preparation method for preparing a proton exchange membrane, used at a high temperature and a low humidity, by doping polybenzimidazole (PBI) (PBI can contain a pyridyl group, a pyrazinyl group or an imidazolyl group) with melamine ring-containing triphosphonate (MTPT, wherein the metal ion M is Zr<4+>, Ce<4+>, Fe<3+>, La<3+> or Y<3+> ) serving as a proton conductor. Thepreparation method comprises the following steps: firstly, preparing the insoluble melamine ring-containing triphosphonate (MTPT) through a three-step reaction, doping the novel PBI with the MTPT, andcrosslinking to form the composite high-temperature and low-humidity proton exchange membrane. The composite membrane is used in the fields of hydrogen-oxygen fuel cells, direct methanol fuel cells or methanol reformed fuel cells, operated at high temperature and low humidity, high-temperature electrolysis, sensors and the like.

The invention provides a dye and metal organic framework material having the formula {[In3O L1.5(H2O)3](NO3)0.7(C16H7O10S3)0.1}(C4H9NO)3(CH3CN)6(H2O)25, wherein C4H9NO is N, N' is dimethylacetamide, C16H7O10S3 is 8-hydroxy hydrazine, 1,3,6-trisulphonic acid trisodium salt, CH3CN is acetonitrile, the crystal structure of the dye and metal organic framework material belongs to the cubic system, andthe space group is as shown in the description, the unit cell parameter is as shown in the description, [alpha]=[beta]=[gamma]=90 degrees, and unit cell volume is as shown in the description. The dyeand metal organic framework material has the following beneficial effects: 1. a proper dye molecule with a proton carrier is selected to be introduced into a pore of a metal organic framework to prepare the dye and metal organic framework material as a proton conducting material and a fluorescence detector while increasing the proton conductivity and detecting the sensitivity of small organic molecules.