35results about How to "Good resistance to vanadium" patented technology

The invention relates to a mixed matrix type cation exchange membrane and a preparation method thereof. The cation exchange membrane takes a sulfonated modified polymer material as a substrate and isdoped with Schiff base type covalent organic framework materials loaded with different functional groups. The preparation method comprises the following steps of: sequentially performing monomer preparation and polymerization of a covalent organic framework material, sulfonation modification of a polymer, uniform mixing of the covalent organic framework material and a sulfonated polymer, and flow-spreading film formation; and finally, performing acid treatment to obtain the cation exchange membrane. The covalent organic framework material can effectively improve the vanadium resistance of themembrane based on the rigid porous structure; the organic porous structure of the covalent organic framework and the different functional modifications can partially compensate the loss of membrane proton conductivity caused by the introduction of particles; the rigid framework can obviously inhibit the swelling in the membrane and can improve the tensile strength of the membrane; COFs is composedof organic structures and can promote compatibility between sulfonated polymers and covalent organic framework materials; and moreover, the polymer as the substrate can improve the film forming performance of the covalent organic framework material, so that the covalent organic framework material has the better mechanical strength.

The invention discloses an ion exchange membrane for a flow battery. The ion exchange membrane comprises an organic porous membrane and a perfluorosulfonic acid ion exchange resin, wherein the organic porous membrane is used as a matrix and the perfluorosulfonic acid ion exchange resin is infiltrated into holes of the organic porous membrane. According to the invention, prepared from the perfluorosulfonic acid ion exchange resin with good chemical stability and the organic porous membrane, the ion exchange membrane for the flow battery has good chemical stability and good compactness, electrical performance and vanadium blocking performance; the cost of the ion exchange membrane is far lower than that of a perfluorosulfonic acid ion exchange membrane with same thickness. The invention further discloses a preparation method for the ion exchange membrane for the flow battery. The preparation method is simple and reliable, has low requirements on equipment, can easily realize large-batch production and conveniently realize large scale commercialization of a vanadium battery and promotes development of new energies like wind energy and luminous energy.

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 provides a mixed membrane for an all-vanadium redox flow battery, a preparation method and application, and belongs to the technical field of vanadium redox flow batteries. In the mixed membrane, a pair of acid-stable metal organic framework materials (screening type MOF and / or conduction type MOF) with different pore structures is adopted as a filling agent and fills a non-fluorinated polymer. The VRFB performance of the two mixed membranes is good, and the enhancement of the two mixed membranes is different. On one hand, the mixed membrane filled with the screening type MOF with the selective window is successfully combined with the molecular screening characteristic of the MOF, and shows remarkably enhanced vanadium resistance; on the other hand, mutually connected channels (hole channels) in the hydrophilic interior of the conduction type MOF form a highway for rapid proton transfer, so that the enhanced proton transfer rate is shown; and through the two MOF materials, the electrochemical performance of the all-vanadium redox flow battery is improved.

The invention relates to the field of an ion exchange membrane for an all-vanadium redox flow battery (VRB), in particular to a preparation method of a functional porous polyvinylidene fluoride (PVDF)membrane for the all-vanadium redox flow battery, which solves the problems that a currently used perfluorosulfonic acid proton exchange membrane is high in vanadium ion transmission, expensive in price and the like. The preparation method comprises the steps of adopting the PVDF as a raw material dissolving through an organic solvent, adding an additive, uniformly mixing, coating the uniform solution on a clean glass plate, keeping warm in a drying box for a certain time, and cooling to obtain the PVDF membrane; after forming the membrane, immersing the membrane into a solvent, leaching themixed additive to form holes, modifying the porous membrane, and preparing the functional porous polyvinylidene fluoride (PVDF) membrane. The method provided by the invention is simple in process, andthe prepared membrane is low in soluble inflation, good in size stability, high in mechanical strength, low in vanadium ion permeability, favorable in chemical stability and heat stability, low in price, and applicable to the all-vanadium redox flow battery (VRB).

The invention relates to the field of a diaphragm of an all-vanadium redox flow battery, and concretely relates to an asymmetric SPEEK / PP / FCB composite diaphragm suitable for the all-vanadium redox flow battery, and thereby, the problems of poor stability of a proton exchange membrane, poor conductivity of proton, poor vanadium resistance, and high cost in the prior art are solved. The composite diaphragm breaks through a traditional proton exchange membrane concept, the prepared composite diaphragm has good proton conductivity, vanadium resistance, mechanical properties, chemical stability, and good VRB battery performance, and provides a novel approach for commercialized preparation of the diaphragm of the all-vanadium redox flow battery.

The invention discloses poly(2-hydroxyethyl methacrylate) and an anion exchange membrane for a vanadium battery. Poly(2-hydroxyethyl methacrylate) has a structure as shown in the formula (I). The substrate of the anion exchange membrane for the vanadium battery is a hydrophobic porous membrane, the surface of which is covered with a layer of poly(2-hydroxyethyl methacrylate). Poly(2-hydroxyethyl methacrylate) provided by the invention can be prepared into a membrane which can be used in the field of vanadium redox flow batteries, and has good vanadium resistance, proton conductivity, mechanical properties, chemical stability and film forming performance. The membrane conductivity reaches the magnitude of 10<-2>s / cm. The vanadium ion permeability reaches 10<-7>cm<2> / min. In addition, the preparation method of the anion exchange membrane for the vanadium battery has advantages of simple and practicable preparation process and low cost, is suitable for industrial production, and is environmentally friendly.

The invention belongs to the field of ion exchange membranes of liquid flow batteries, and particularly relates to a preparation method of a low-cost all-vanadium redox flow battery diaphragm. According to the preparation method, an ethylene-vinyl alcohol copolymer is used as a substrate, and the substrate is subjected to irradiation grafting with a monomer containing a cation exchange function and an anion exchange function, and then protonation is carried out after film forming to obtain the all-vanadium redox flow battery diaphragm, so as to solve the technical problems that the existing vanadium flow battery diaphragm is expensive in price and high in vanadium permeability.

The invention discloses a modified PES (polyether sulfones)-PVP (polyvinylpyrrolidone) hybrid anion exchange membrane for a vanadium redox battery. The modified PES-PVP hybrid anion exchange membrane for the vanadium redox battery is prepared by blending of quaternization modified PES and PVP, wherein the quaternization modified PES is a mixture of quaternary ammonium base type quaternization modified PES and imidazole type quaternization modified PES. By blending of the quaternary ammonium base type quaternization modified PES, the imidazole type quaternization modified PES and the PVP, superior properties of the three are combined. In application to all-vanadium redox flow batteries, the modified PES-PVP hybrid anion exchange membrane has excellent vanadium resistance and ion selection performances and has advantages of high stability, superior mechanical properties, high coulombic efficiency and long service life.

The invention relates to a preparation method of a composite membrane, and belongs to the field of ionic membrane preparation. The preparation method comprises the following steps: by taking perfluorinated sulfonic acid resin with good chemical stability as a membrane material main body, mixing polymers with different functions, dissolving the resin through an organic solvent to obtain slurry, adding an additive, and uniformly mixing to obtain a gel material; putting the gel material into an extruder for extrusion molding, allowing the molded membrane to enter environments of different temperature sections, gradually reducing the different temperature sections from high to low, allowing the membrane subjected to gradient heat treatment to enter an extraction agent for extraction, taking out the membrane, allowing the membrane to enter deionized water for washing and for calendering and rolling through a hot roller to obtain the porous ion exchange composite membrane. The continuous preparation process of the composite membrane is simple, and the prepared membrane is low in swelling, good in size stability, high in mechanical strength, low in vanadium ion permeability, good in chemical and thermal stability, suitable for all-vanadium redox flow batteries, simple to operate and low in requirements for equipment and operators.

The invention provides a preparation method of an electrolyte separator for the vanadium battery. The preparation method comprises the following steps of 1) preparing quaternary ammonium silane; 2) preparing a polymer; and 3) preparing the separator. The invention also discloses the electrolyte separator, obtained by the preparation method of the electrolyte separator for the vanadium battery, forthe vanadium battery and the vanadium battery employing the electrolyte separator for the vanadium battery as an electrolyte separator. Compared with a traditional quaternary ammonium salt negative ion exchange membrane in the prior art, the electrolyte separator for the vanadium battery, prepared by the method has the advantages of lower cost, better mechanical property, better chemical stability and better thermal stability, more excellent vanadium blocking performance, higher ion conductivity and small deformation, and the application requirement of the electrolyte separator for the vanadium battery is met.

The invention discloses a perfluorosulfonic acid resin / polyvinylidene fluoride composite electrospinning membrane and a preparation method thereof, and belongs to the technical field of all-vanadium redox flow battery (VRFB) diaphragms. The method comprises the following steps of preparing a polyvinylidene fluoride resin spinning film by adopting electrostatic spinning, soaking the obtained polyvinylidene fluoride resin spinning film in an ethanol solution of perfluorosulfonic acid resin with the concentration of 3%-20% by weight, drying to form a film, and repeating the soaking-drying processfor 3-10 times to obtain the polyvinylidene fluoride fiber membrane. The composite electrospinning membrane prepared by the invention has good vanadium resistance, mechanical properties and electrical conductivity, so that the VRFB has good battery performance, and a new idea is provided for the development of the all-vanadium redox flow battery diaphragms.

The invention relates to the field of ion-exchange membranes for all-vanadium redox flow batteries (VRB), in particular to a method for preparing functional porous polyvinylidene fluoride (PVDF) membranes for all-vanadium redox flow batteries, which solves the problem of currently used perfluorinated Sulfonic acid proton exchange membrane has the problems of high vanadium ion permeability and high price. PVDF is used as raw material, dissolved in an organic solvent, and additives are added to make it evenly mixed. The uniform solution is spread on a clean glass plate, kept in an oven for a certain period of time, and then cooled to obtain a PVDF film. After the film is formed, the diaphragm is immersed in a solvent, and the mixed additives are leached out to form pores, and then the porous film is modified to prepare a functional porous polyvinylidene fluoride (PVDF) film. The method of the invention is simple in process, and the prepared membrane has low swelling, good dimensional stability, high mechanical strength, low vanadium ion permeability, good chemical and thermal stability, and low price, and is suitable for all-vanadium redox flow batteries ( VRB).

The invention discloses poly(2-hydroxyethyl methacrylate) and an anion exchange membrane for a vanadium battery. Poly(2-hydroxyethyl methacrylate) has a structure as shown in the formula (I). The substrate of the anion exchange membrane for the vanadium battery is a hydrophobic porous membrane, the surface of which is covered with a layer of poly(2-hydroxyethyl methacrylate). Poly(2-hydroxyethyl methacrylate) provided by the invention can be prepared into a membrane which can be used in the field of vanadium redox flow batteries, and has good vanadium resistance, proton conductivity, mechanical properties, chemical stability and film forming performance. The membrane conductivity reaches the magnitude of 10<-2>S / cm. The vanadium ion permeability reaches 10<-7>cm<2> / min. In addition, the preparation method of the anion exchange membrane for the vanadium battery has advantages of simple and practicable preparation process and low cost, is suitable for industrial production, and is environmentally friendly.

The invention discloses an ion-exchange hybrid membrane for a vanadium battery and a preparation method thereof, which is composed of silicon dioxide particles coated with acrylic acid and acrylamide copolymer and sulfonated polyether ether ketone, and is formed by casting process. The membrane also includes the following steps: S1: preparing a sulfonated polyether ether ketone solution; S2: preparing pretreated nano-silica; S3: preparing polymer-modified silica core-shell particles; S4: preparing sulfonated polyether ether Ketone / polymer modified silica solution; S4: The ion-exchange hybrid membrane for vanadium battery was prepared. The invention can reduce the cost of the membrane, effectively improve the vanadium blocking ability, and at the same time, the polymer coated on the surface of the silicon dioxide contains a large amount of carboxyl groups and amino groups, which can increase the proton transmission density and maintain its high proton conductivity.

The invention relates to a preparation method of a composite membrane, which belongs to the field of ion membrane preparation. Use perfluorosulfonic acid resin with good chemical stability as the main membrane material, mix polymers with different functions, dissolve the resin through organic solvents to obtain slurry, add additives, mix uniformly to form a gel material; put the gel material into Extruded in the extruder, the formed film is put into the environment of different temperature ranges, and the different temperature ranges are gradually reduced from high to low, and the film after gradient heat treatment enters the extraction agent for extraction, takes out the film and washes it in deionized water, heat Roll calendering and winding to obtain a porous ion exchange composite membrane. The continuous preparation process of the composite membrane of the present invention is simple, and the prepared membrane has low swelling, good dimensional stability, high mechanical strength, low vanadium ion permeability, good chemical and thermal stability, and is suitable for all-vanadium redox flow batteries. The operation is simple, and the requirements for equipment and operators are not high.

A mixed matrix type cation exchange membrane and a preparation method thereof. The cation membrane is based on a sulfonated modified polymer material and doped with Schiff base type covalent organic framework materials loaded with different functional groups. During the preparation, the monomer preparation and polymerization of the covalent organic framework material, the sulfonation modification of the polymer, the uniform mixing of the covalent organic framework material and the sulfonated polymer, and the extension of the membrane are carried out, and finally the cation exchange membrane is obtained by acid treatment. . Based on its rigid porous structure, the covalent organic framework material can effectively improve the vanadium barrier performance of the membrane; the organic porous structure of the covalent organic framework and different functional modifications can partially compensate the loss of the proton conductivity of the membrane caused by the introduction of particles; its rigidity The framework can significantly inhibit swelling in the membrane and improve the tensile strength of the membrane; COFs are composed of organic structures, which can promote the compatibility between sulfonated polymers and covalent organic framework materials; polymers as substrates can improve the synthesis of covalent organic framework materials. Membrane performance, so that it has better mechanical strength.

The invention belongs to the technical field of anion exchange membranes, aims to improve the ion transfer performance and dimensional stability of anion exchange membranes, and provides a polypiperazinium functionalized anion exchange membrane and a preparation method thereof. A polypiperazinium-functionalized polymer with good dimensional stability and mechanical properties is obtained, and then the polymer is quaternized to obtain a dopiperazinium-functionalized polymer, and a film is formed. The prepared membrane has good dimensional stability and good ion conductivity, and can be applied in neutral and all-vanadium redox flow batteries.

The invention discloses a preparation method and application of a blended membrane based on a microporous skeleton. The skeleton polymer is one of cyano PIM (PIM-1), oximido PIM (AO-PIM-1), carboxyl PIM (cPIM-1) and sulfo PIM (sPIM-1), and the base membrane is a non-fluorinated polymer with high proton conductivity. A membrane blending strategy which is simple in preparation process and strong in supporting framework is provided for the first time, and the mechanical stability of the ion conducting membrane is effectively improved. On one hand, the base membrane provides a large number of ion transmission channels; on the other hand, the spiral framework polymer restrains the movement of the chain, so that the stability of the membrane is improved. Through the mixing, a brand-new strategy is provided for improving the use strength of the diaphragm.

The invention belongs to the field of ion exchange membranes of liquid flow batteries, and more specifically relates to a preparation method of a low-cost all-vanadium redox flow battery diaphragm. It uses ethylene-vinyl alcohol copolymer powder as the base material, grafts with monomers containing cation exchange function and anion exchange function by irradiation, and protonates after film formation to obtain an all-vanadium redox flow battery diaphragm, thus solving the current problem The vanadium redox flow battery separator is expensive and has high vanadium permeability technical problems.

The invention relates to the field of membrane electrodes for all vanadium redox flow batteries (VRB), particularly to a preparation method of an integrated composite membrane for all vanadium redox flow batteries. According to the present invention, the performances of the all vanadium redox flow batteries are determined by the voltage efficiency and the current efficiency, wherein the ohmic polarization can cause the voltage loss of the battery so as to affect the voltage efficiency; the integrated composite membrane is prepared by closely combining the electrode and the separation membraneso as to effectively reduce the internal resistance of the battery, reduce the polarization loss of the battery, and improve the performance of the VFB; and the prepared membrane electrode has advantages of good vanadium resistance, good mechanical performance and good electrical conductivity, can improve the performance of the single VRB battery, and can be used in the field of all vanadium redox flow batteries.

The invention belongs to the technical field of anion exchange membranes, aims to improve the ion transfer performance and dimensional stability of an anion exchange membrane, and provides a novel polypiperazinium functionalized anion exchange membrane and a preparation method thereof. According to the preparation method, a polypiperazinium-containing functionalized polymer with good dimensional stability and mechanical properties is synthesized, quaternization is carried out on the polymer to obtain the polypiperazinium-containing functionalized polymer, and the polypiperazinium-containing functionalized polymer is made into a membrane. The prepared membrane has relatively good dimensional stability and relatively good ionic conductivity, and can be applied to neutral and all-vanadium redox flow batteries.

The invention relates to the field of membranes for all-vanadium redox flow batteries, in particular to a method for preparing an asymmetric SPEEK / PP / FCB composite membrane suitable for all-vanadium redox flow batteries, which solves the problems existing in the prior art Proton exchange membranes have problems such as poor stability, poor proton conductivity, poor vanadium resistance, and high price. The invention uses low-cost polyether ether copper (PEEK) as a raw material to prepare sulfonated polyether ether copper (SPEEK) through a sulfonation reaction; utilizes carbon materials to prepare functionalized carbon tubes (FCB), and the polypropylene nickel-hydrogen battery The polypropylene (PP) diaphragm was used as the reinforced film, and the SPEEK / PP / FCB composite diaphragm was prepared by film-forming methods such as step-by-step casting, slurry coating, and dipping. The invention breaks through the traditional proton exchange membrane concept, and the prepared composite diaphragm has the advantages of good proton conductivity, vanadium resistance, mechanical properties, chemical stability and excellent VRB battery performance, and is a commercial diaphragm for all-vanadium redox flow battery. opened up new avenues.

The invention discloses an ion exchange membrane for a flow battery. The ion exchange membrane comprises an organic porous membrane and a perfluorosulfonic acid ion exchange resin, wherein the organic porous membrane is used as a matrix and the perfluorosulfonic acid ion exchange resin is infiltrated into holes of the organic porous membrane. According to the invention, prepared from the perfluorosulfonic acid ion exchange resin with good chemical stability and the organic porous membrane, the ion exchange membrane for the flow battery has good chemical stability and good compactness, electrical performance and vanadium blocking performance; the cost of the ion exchange membrane is far lower than that of a perfluorosulfonic acid ion exchange membrane with same thickness. The invention further discloses a preparation method for the ion exchange membrane for the flow battery. The preparation method is simple and reliable, has low requirements on equipment, can easily realize large-batch production and conveniently realize large scale commercialization of a vanadium battery and promotes development of new energies like wind energy and luminous energy.

The invention discloses a modified PES-PVP blended anion exchange membrane for vanadium batteries. A modified PES-PVP blended anion exchange membrane for vanadium batteries of the present invention is prepared by blending quaternized modified PES and PVP, and the quaternized modified PES is quaternized with a quaternary ammonium base A mixture of modified PES and imidazole quaternized modified PES; after blending the quaternary ammonium base quaternized modified PES anion exchange membrane, imidazole quaternized modified PES anion exchange membrane and PVP, the combination of the three excellent performance. The modified PES-PVP blended anion exchange membrane prepared by the present invention has good vanadium resistance performance, ion selection performance, excellent stability and mechanical performance, and high coulombic efficiency when applied to an all-vanadium redox flow battery ,long lasting.

The invention relates to the field of ion exchange membranes used for all-vanadium redox flow batteries (VRB), and specifically discloses a preparation method of a composite membrane with a catalytic function for positive and negative electrodes used for the all-vanadium flow batteries. The membrane of a majority of all-vanadium flow batteries has the problem that the requirements, in some aspects, of the batteries can be met so that a proton conduction membrane with excellent overall performance is difficult to obtain, namely the problem is a balance problem between vanadium resistance and conductivity performance. Metal salt with an obvious catalytic function in reactions of the positive and negative electrodes is introduced into two sides of the membrane by adopting a step-by-step tape casting method, and the membrane has the catalytic function, so that the composite membrane with the catalytic function is prepared. The composite membrane prepared by the invention has good vanadium resistance performance, mechanical property and good single VRB battery performance, and the composite membrane can be widely applied to the field of the all-vanadium redox flow batteries.