70 results about "Ion permeability" patented technology

Provided is a versatile nonwoven fabric having excellent heat resistance and mechanical strength and applicable to applications requiring heat resistance; or a nonwoven fabric having excellent heat resistance, mechanical strength, and permeability. Moreover, provided is a separator for electrochemical elements having excellent heat resistance and mechanical strength. Furthermore, provided is a membrane support having excellent heat resistance, mechanical strength, and ion permeability.The nonwoven fabric of the present invention comprises a polymethylpentene component and a polyethylene component, wherein the polyethylene component is fused, and wherein the polymethylpentene component accounts for 30% by volume or more of the total fibers constituting the nonwoven fabric, and the polyethylene component accounts for 30% by volume or more of the total fibers constituting the nonwoven fabric. The separator for electrochemical elements of the present invention comprises the nonwoven fabric. Another nonwoven fabric of the present invention comprises core-sheath composite fibers having a polyethylene component as a sheath component and a polymethylpentene component as a core component, wherein the polyethylene component as the sheath component of the core-sheath composite fiber is fused, wherein the polymethylpentene component accounts for 30% by volume or more of the total fibers constituting the nonwoven fabric, and the polyethylene component accounts for 30% by volume or more of the total fibers constituting the nonwoven fabric, wherein a thickness of the nonwoven fabric is 100 μm or less, and the nonwoven fabric has a direction with a tensile strength per mass per unit area of 2.0 N / 5 cm-width or more, or wherein a ratio (L / D) of a fiber diameter (D, unit: μm) to a length (L, unit: μm) of the core-sheath composite fiber is 350 or more. The membrane support of the present invention comprises the other nonwoven fabric.

The embodiment of the invention provides a dotted array coating battery diaphragm which comprises a diaphragm base material and a polymer coating coated on the surface of at least one side of the diaphragm base material, and the polymer coating comprises a plurality of crater shapes which are provided with peripheral bulges and truncated cone-shaped bulges with concave centers, and the dotted coatings are arranged on the surface of the diaphragm base material to form a dotted array. According to the dot-shaped array coating battery diaphragm, the crater structure of the dot-shaped coating is creatively designed, accumulation of polymers at coating points is effectively reduced, the influence on the performance of the battery diaphragm after hot pressing is correspondingly small, the battery diaphragm can meet the requirement for the bonding strength with a battery pole piece, and meanwhile the battery diaphragm can be used for manufacturing the battery pole piece. The composite material has good ion permeability, wettability and air permeability, and better performance balance is achieved. The embodiment of the invention also provides a preparation method of the dotted array coating battery diaphragm and a secondary battery containing the dotted array coating battery diaphragm.

The invention belongs to the technical field of building material and solid waste resource utilization, and relates to a high-durability and high-toughness slag powder-steel slag powder quaternary synergistic excitation-reinforcing agent and a preparation method of gel system mortar. The quaternary synergistic excitation-reinforcing agent comprises the following raw materials in parts by mass: 4-16 parts of sodium hydroxide, 79 parts of sodium silicate, 4-16 parts of aluminum sulfate and 60 parts of metakaolin, and the sum of the mass parts of the sodium hydroxide and the aluminum sulfate is 20. According to the quaternary synergistic excitation-reinforcing agent, sodium hydroxide and sodium silicate are used as main excitants, and aluminum sulfate serving as a function regulator and metakaolin serving as a high-activity aluminum-silicon source and a micro aggregate are introduced to serve as synergistic reinforcing components; the four components cooperate to jointly form an excitation-reinforcement composite system with high durability and high toughness; the sulfate erosion resistance, the chloride ion penetration resistance, the carbonization resistance, the toughness and the impact resistance of the slag powder-steel slag powder cementing system mortar are improved.

The invention discloses concrete with anti-freezing performance and a preparation method thereof, and belongs to the technical field of concrete. The invention aims to solve the problems that the porosity of an interface transition area is high, hydration products are easy to degrade and the anti-freezing and anti-permeation performances are insufficient under the working conditions of high altitude, low air pressure, strong ultraviolet rays and salt-freezing synergy of the existing large-dosage fly ash concrete. The concrete is prepared from the following components in parts by weight: 100 parts of cement, 100 to 150 parts of coal ash, 280 to 320 parts of fine aggregate, 1000 to 1200 parts of modified basalt coarse aggregate, 1.5 to 3.5 parts of polycarboxylic acid water reducing agent, 0.2 to 0.6 part of PEG (Polyethylene Glycol) coated chitosan quaternary ammonium salt microspheres, 0.05 to 0.25 part of chitosan grafted nano cerium oxide composite particles, 1.0 to 3.0 parts of bacillus pseudofirmus microcapsule-polyvinylpyrrolidone mixture and 0.03 to 0.12 part of trisodium citrate. Through the synergistic effect of all the components, the interface structure of the concrete is effectively optimized, the ultraviolet aging resistance, the salt-freezing synergistic damage resistance and the chloride ion infiltration resistance are improved, the high-altitude severe service condition is adapted, and reliable material support is provided for high-altitude infrastructure construction.

This invention discloses a high-precision patterned hydrogel, its preparation method, and a flexible electronic device. The preparation method of the high-precision patterned hydrogel includes the following steps: using a buffer solution containing polyethylene glycol thiol derivatives and hydrogen peroxide as a prepolymer solution (prepolymer solution 1), applying the prepolymer solution 1 to the surface of a substrate, and reacting to obtain a substrate with a thin film; using an aqueous solution containing a monoene water-soluble monomer, a diene water-soluble monomer, a water-soluble photoinitiator, and a polymerization inhibitor as a prepolymer solution (prepolymer solution 2), immersing the substrate with the first thin film in the prepolymer solution 2; after immersion, washing and solvent removal to obtain a substrate with a dry film; photolithographically patterning the substrate with the dry film, and then removing unexposed areas with a developer to obtain the high-precision patterned hydrogel. This invention can effectively improve the precision of the patterned hydrogel, while also giving the high-precision patterned hydrogel high biocompatibility and ion permeability.

The present application relates to a kind of in situ low-temperature confined carbonization construction carbon dot enrichment coating layer manganese-based positive electrode material and its preparation method, by accurately coordinating the evolution condition of carbon point carbon source in the mixing system environment of coating process, freezing condition and sublimation and carbonization, realize the whole process synergistic control of carbon point carbon source spatial distribution, ice crystal template state, skeleton construction of controlled conversion of carbon point carbon source and harmful residue removal on the surface of manganese-based positive electrode material, successfully constructed the carbon dot enrichment coating layer of size controllable, density adjustable, ion permeability good and interface combination firm on the surface of manganese-based positive electrode material, to realize the synergistic promotion of manganese-based positive electrode material cycle performance, rate performance and interface stability.

A single-use disposable potentiometric reference sensor includes an insulating base substrate; a reference electrode disposed on the insulating base substrate, wherein the reference electrode is a silver-silver chloride electrode; an inner layer disposed on the reference electrode, wherein the inner layer is an amorphous salt layer including an amorphous polysaccharide and a salt having equally-mobility cations and anions; and a semi-permeable cover membrane disposed over the inner layer, wherein the semi-permeable cover membrane has water vapor and ion permeability.

The invention belongs to the technical field of biofouling prevention sensors, and particularly relates to a polymer film sensing chip as well as a preparation method and application thereof. The polymer film sensing chip provided by the invention comprises a flexible substrate, an indicator electrode conducting layer, an indicator electrode sensing film, a reference electrode conducting layer, a reference electrode sensing film and a flexible packaging layer which are arranged on the surface of the flexible substrate, and a self-adhesion hydrogel layer arranged on the outermost layer, the material of the self-adhesion hydrogel layer comprises catechol type hydrogel, chitosan type adhesion hydrogel, polypeptide type hydrogel or hyaluronic acid type hydrogel. The self-adhesion hydrogel layer in the polymer film sensing chip provided by the invention contains a large number of hydrophilic functional groups and has excellent hydrophilic performance, and a water layer structure can be formed between the surface of the polymer film and fouling organisms so as to hinder the adhesion of the fouling organisms. The polymer film sensing chip provided by the invention has good ion permeability and mechanical strength, and can effectively inhibit adhesion of fouling substances.

The present application relates to the technical field of concrete, in particular to a high-performance concrete mixture for power plants and a construction method thereof. The interface-hydration synergistic regulation technology is adopted, in which cementitious materials, water, river sand and continuously graded gravel are used as the matrix, and poly-carboxylic acid water reducing agent, crystal nucleus slurry A / B and zwitterionic-hydrophobic copolymer brush modified silica particle B are alternately added in stages to pre-coat and synchronously disperse the coarse aggregate, so that the concrete with long-time slump retention, low bleeding, high early and long-term strength, significantly reduced electric flux and chloride ion permeability, improved sulfate erosion resistance and volume stability is obtained under the conventional mixing and pumping conditions. The in-mold temperature, layered pouring thickness, vibration frequency and curing time limit are specified to ensure the engineering implementability and durability, and the concrete is suitable for power plant structures in high-temperature, high-humidity and chlorine-containing environments, and the construction is reliable and the maintenance is convenient.

The invention relates to an epoxy adhesive for assembling bridge segments in a marine environment and a preparation method, the epoxy adhesive comprises a component A and a component B. The component A comprises epoxy resin, modified epoxy resin, a reactive diluent, a thixotropic agent, a coupling agent, a defoaming agent, an ultraviolet light absorber and a filler; the epoxy resin comprises bisphenol A type epoxy resin, hydrogenated bisphenol A type epoxy resin and bisphenol F type epoxy resin, and the reactive diluent is C12-C14 alkyl glycidyl ether; the component B comprises a modified amine curing agent, a thixotropic agent and a filler, and the filler is formed by compounding different grades of active silica micropowder. Through molecular hydrophobic design, physical structure dense filling and interface chemical bonding, the adhesive has excellent wet concrete adhesion, extremely low chloride ion permeability, excellent damp-heat aging resistance and balanced construction manufacturability, and solves the problem of durability of a joint of a segment assembled bridge in a marine environment.

The application belongs to the technical field of all-vanadium redox flow battery separators, and specifically discloses a sulfonated polyether ether ketone / polyaniline composite membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing polyether ether ketone with concentrated sulfuric acid, heating and reacting in a water bath, and preparing sulfonated polyether ether ketone solids; mixing molybdenum disulfide with toluene, ultrasonicating, adding 1,3-propanesultone, and heating in an oil bath to prepare sulfonated molybdenum disulfide powder; mixing the sulfonated molybdenum disulfide powder, polyaniline and a DMF solution, stirring and ultrasonicating, adding sulfonated polyether ether ketone solids, stirring to obtain casting membrane slurry, coating on a glass plate, drying into a film, sequentially immersing in a sulfuric acid solution and deionized water, and obtaining the sulfonated polyether ether ketone / polyaniline composite membrane. The application discloses a sulfonated polyether ether ketone / polyaniline composite membrane as well as a preparation method and application thereof. The sulfonated polyether ether ketone / polyaniline composite membrane has high proton conductivity, can maintain a low vanadium ion permeability, and improves the electrochemical performance of an all-vanadium redox flow battery.

Provided is a laminate for a nonaqueous electrolyte secondary battery superior in ion permeability under applied pressure. A laminate for a nonaqueous electrolyte secondary battery in accordance with the present disclosure, including a porous layer and a particle layer provided on at least one surface of the porous layer, the laminate satisfying the following Formula (1):Ra / Sa≥0.80  (1)(in the Formula (1), Ra represents an arithmetic mean roughness [μm] measured by contact-type measurement on a surface on which the particle layer is provided and Sa represents an arithmetic mean roughness [μm] measured by noncontact-type measurement on the surface on which the particle layer is provided.)

The invention provides an electrolyte additive and application, the electrolyte additive comprises a compound with a structure shown in a formula 1, X and Y are respectively and independently selected from R1 and R2, and are respectively and independently selected from a single bond, substituted or unsubstituted-CH2-and substituted or unsubstituted-CH2-CH2-. The electrolyte additive disclosed by the invention contains the compound with the structure as shown in the formula 1, and the keto-carbonyl group can be coordinated with metal ions in electrolyte salt, so that the additive can move to the surface of an electrode along with current to generate electrochemical reaction on the surface of the electrode; in addition, an open ring of a cyclic ketone structure is polymerized and crosslinked with organic matters in the battery or self to form a double-electrolyte salt organic film with good stability, high structural strength and good ion permeability, so that the high-temperature storage and high-temperature cycle performance of the battery is improved.

The invention discloses anti-corrosion, anti-rust, anti-seepage and anti-crack concrete prepared from a nano material, and relates to the technical field of building materials. The concrete comprises the following components: cement, fly ash, mineral powder, nano silicon dioxide, nano zinc oxide, nano calcium carbonate, aggregate, an organic-inorganic composite corrosion inhibitor, a polycarboxylate superplasticizer and water. Through filling microcracks with the nanometer material, dual protection of reinforcing steel bars with the corrosion inhibitor and hydrophobic treatment of aggregate, the chloride ion permeability of the concrete is reduced, the 28-day shrinkage rate is reduced, the corrosion resistance, rust resistance, impermeability and crack resistance of the concrete are effectively improved, and the concrete is suitable for high-corrosion environments such as a marine environment and a salinized soil environment.

The aim of the present invention is to provide an alkaline water electrolysis membrane having good gas barrier property, which can maintain hydrophilicity during operation in long-term electrolysis, inhibit the reduction in ion permeability caused by bubble attachment, and improve the hydrogen production efficiency during the long-term operation of an alkaline electrolytic cell. The alkaline water electrolysis membrane is an electrolysis membrane capable of inhibiting the reduction of hydrophilicity thereof during long-term use and achieving a high production yield of hydrogen. The electrolysis membrane comprises: a porous support, and a porous resin containing a surfactant.

The invention discloses a modified sulfonated polyether-ether-ketone proton exchange membrane as well as a preparation method and application thereof. The modified sulfonated polyetheretherketone proton exchange membrane comprises sulfonated polyetheretherketone with the sulfonation degree of 85-90% and a triazine biphenyl compound with an isocyanate group. The mass ratio of the sulfonated polyether ether ketone to the triazine biphenyl compound with the isocyanate group is 100: (5-10). According to the proton exchange membrane, sulfonated polyether-ether-ketone is modified through a triazine biphenyl compound with an isocyanate group, under the condition that good proton conductivity is kept, the mechanical strength and dimensional stability of the high-sulfonation-degree polyether-ether-ketone proton exchange membrane can be effectively improved, the vanadium ion permeability is reduced, and the proton exchange membrane has good comprehensive use performance. The diaphragm can be used for a hydrogen fuel cell or a hydrogen production electrolytic cell.

The invention discloses a thermal stable diaphragm material for a lithium ion battery and a preparation method of the thermal stable diaphragm material, and the material solves the key problems of easy thermal runaway, deformation shrinkage, channel blockage and the like of the existing diaphragm under extreme working conditions by synergistically constructing a three-dimensional composite structure with high thermal stability, mechanical flexibility and ion permeability. The flexible lithium battery diaphragm has good large-scale preparation capability and engineering application prospect, cement which is a traditional building material is introduced into a flexible lithium battery diaphragm system for the first time, and a multi-scale synergistic ion guide channel system is constructed by utilizing the high thermal stability and natural porosity of the cement and combining a polymer flexible phase and an in-situ foaming process. The strategy not only realizes the morphological stability and thermal protection capability of the material under a high-temperature condition, but also significantly improves the ion permeability and interface electrochemical suitability, and breaks through the problem of performance balance between thermal stress and flexibility of the existing polyolefin and inorganic coating diaphragm. Besides, the whole system adopts low-cost raw materials, the preparation process can be completed under normal-temperature and normal-pressure conditions, high-temperature sintering, electrospinning or vacuum treatment is not needed, and the industrial popularization potential is extremely high.

An object of the present invention is to achieve both blocking resistance and powder shedding resistance while preventing a decrease in lithium ion permeability. [Solution] The polymer particles have a core-shell structure, and the shell portion of the polymer particle contains an acid group-containing monomer as a constituent unit. The dispersant is contained in an amount of 2 to 18 parts by mass per 100 parts by mass of the monomer constituting the polymer particle. The proportion of the core portion in a total of 100% by mass of the core portion and shell portion of the polymer particle is 30 to 80% by mass. The polymer particles have an average particle diameter D50 of 300 to 1500 nm, where the average particle diameter D50 is the particle diameter at a cumulative 50% in a volume-based particle size distribution measured by a laser diffraction / scattering method. The monomer constituting the polymer particle is a (meth)acrylic acid alkyl ester monomer or a mixture of a (meth)acrylic acid alkyl ester monomer and an aromatic vinyl monomer.

The invention provides an RcERF98 gene and application of the RcERF98 gene to enhancement of gray mold resistance of Chinese roses, and belongs to the technical field of biological prevention and control. The nucleotide sequence of the RcERF98 gene is as shown in SEQ ID NO: 1. The RcERF98 gene is silent and overexpressed in petals which are good in growth state and free of botrytis cinerea infection of Chinese roses, and research results show that the petals treated by the silent RcERF98 gene are larger in scab area, higher in ion permeability, lower in hydrogen peroxide content and higher in ascorbic acid content, and the resistance of the petals of the Chinese roses to the botrytis cinerea is reduced; the petals treated by the overexpressed RcERF98 gene are smaller in scab area, lower in ion permeability, higher in hydrogen peroxide content and lower in ascorbic acid content, and the resistance of the Chinese rose petals to gray mold is enhanced.

The invention relates to the technical field of proton exchange membrane materials and preparation, and particularly discloses an enhanced ether-free skeleton hydrocarbon proton exchange membrane as well as a preparation method and application thereof. The proton exchange membrane comprises an ether-free skeleton polyphenyl high polymer matrix, a sulfonate group grafted to a side chain of the matrix, and a polyether-ether-ketone woven mesh reinforcement layer compounded in the matrix, the ether-free skeleton polyphenyl high polymer is prepared through super acid catalysis one-step polymerization, the sulfonate group is introduced through chemical modification to endow proton conduction capacity, and the polyether-ether-ketone woven mesh cloth is combined with a high polymer matrix through a pouring composite process to improve mechanical performance and stability. According to the invention, the problems of environmental harm, supply chain limitation and high cost of the existing perfluorosulfonic acid membrane are solved, the chemical stability is obviously improved compared with that of the traditional sulfonated polyether ether ketone membrane, and the membrane has more advantages in the aspects of dimensional stability, ion selectivity, vanadium ion permeability and comprehensive electrical property of the all-vanadium redox flow battery compared with a commercial Nafion membrane; and the method has extremely high commercial application value.

The application provides a method and equipment for extracting alkali metal from lithium precipitation waste. In the field of alkali metal extraction, 0.0003 mol of ethidium bromide and 0.0002 mol of 1,3,5-triformylphloroglucinol are added in 7.5 mL of dimethyl sulfoxide, respectively, and ultrasonic treatment is carried out for 10 min to obtain an aldehyde monomer solution and an amine monomer solution; S2: the aldehyde monomer solution is slowly added to the amine monomer solution and stirred until it becomes dark red, and then it is left to stand for 24 h to obtain a porous organic framework nanosheet. The artificial cation-chloride co-transporter membrane has weak surface charge, a narrow-pore porous organic framework and high selectivity, can identify basic ions and halogen ions Cl- and reject other cations and anions, and has size-induced ion selectivity: Cl-≈K+>Na+>Li+>>Ca2+>Mg2+, has low permeability to Rb and Cs, uses the rich chloride ions in the lithium precipitation mother liquor to improve lithium ion permeability and lithium extraction performance, and is not prone to produce too much waste liquid, has good selectivity, a fast process and low cost.

The application discloses an electrochemical device and an electronic device. The electrochemical device comprises a first shell, a second shell, a separator, a first electrode assembly and a second electrode assembly. The separator is located between the first shell and the second shell to define a first cavity and a second cavity on two sides of the separator respectively. The first electrode assembly is arranged in the first cavity, and the second electrode assembly is arranged in the second cavity. The Li ion permeability K1 of the separator satisfies K1≤1.0 μg / (cm 2 ·h). The electrochemical device of the application can have excellent durability.

The invention discloses a wind power foundation grouting material and a preparation method thereof, and belongs to the field of building materials. The material is composed of Portland cement, 0.1-4 mm specific graded sand, a superfine slag / silica fume composite admixture, steel wire fibers, a polycarboxylic acid water reducing agent, a calcium aluminate-calcium sulfate early strength agent, a plastic expanding agent, a mineral oil defoaming agent and a Na2SO4-NaOH exciting agent. Through the synergistic effect of the admixture pozzolanic effect and the excitant, the 28-day compressive strength is larger than or equal to 140 MPa, the elasticity modulus is 40-55 GPa, and the chloride ion permeability coefficient is smaller than or equal to 1.5 * 10 <-12 > m < 2 > / s. The preparation method adopts a dry and wet material step-by-step mixing process and is combined with a three-stage temperature control technology: a gel phase is activated at the initial temperature of 25-35 DEG C, the reaction rate is increased at the acceleration stage of 40-50 DEG C, shrinkage is controlled at the curing stage of 15-30 DEG C, and the temperature rise rate is less than or equal to 10 DEG C / A temperature control bag sealing structure and a concrete gentle slope forming process are matched, so that the problems of large-volume grouting cracking and low-temperature reaction inhibition are solved. The material has the characteristics of high strength, low shrinkage and seawater corrosion resistance, and the cost is reduced by 30-40% compared with that of a traditional scheme.

The invention provides a test method for measuring chloride ion permeability resistance of cement paste by an electric flux method. The test method comprises the following five steps: manufacturing a cement paste test piece, pretreating the cement paste test piece, clamping the cement paste test piece, measuring current and actual electric flux passing through the cement paste test piece, and calculating an electric flux conversion value of the cement paste test piece. By reasonably controlling the direct current constant voltage value, the risk that an instrument is damaged due to the fact that the current passing through the cement paste test piece is large in the test is reduced, and meanwhile the adverse effect on the test result due to the fact that the temperature of the solution is rapidly increased and electrode reaction is generated under the long-time high direct current constant voltage effect can be reduced; and finally, semi-quantitative evaluation of the electric flux between cement paste test pieces with different mixing ratios at the same age is realized.

The application belongs to the field of secondary batteries, and particularly relates to a non-aqueous electrolyte and a secondary battery. The non-aqueous electrolyte comprises a non-aqueous organic solvent, an electrolyte salt and a compound shown in structural formula I: wherein X is selected from any one of, * is a bonding position; R is selected from an alkyl group or a halogenated alkyl group with 1-4 carbon atoms; A is selected from a lithium atom or a sodium atom; the lithium salt and the sodium salt structure of the compound shown in structural formula I can be electrochemically reacted with current moving to an electrode surface; when the cyclic structure of the compound shown in structural formula I is electrochemically reacted, it is empirically speculated that the carbon-oxygen bond is opened, the oxygen-containing end is reacted with a lithium salt or a sodium salt in an electrolyte to form a corresponding organic lithium salt and an organic sodium salt respectively; and the other end free radical is polymerized with an organic matter in the battery or itself to form a double lithium salt or a double sodium salt organic thin film with good ion permeability, so that the battery impedance is reduced and the high-temperature performance of the battery is improved.

The invention provides a protective coating composition, and relates to the technical field of coatings. According to the protective paint disclosed by the invention, the asparagus polyurea is used as a main material, and a polytetrahydrofuran ether chain segment is introduced into the asparagus polyurea, so that the mechanical strength of an asparagus polyurea coating is improved, the water absorption rate, the chloride ion permeability and the carbonization depth ratio are reduced, and the protective paint has better protective performance and is suitable for hydraulic concrete buildings.

The application discloses a method for preparing a cation exchange membrane based on chelating agent regulation of casting solution. The method uses a porous filter membrane (such as a polyvinylidene fluoride membrane) as a support layer, and through a casting solution containing a specific chelating agent, a sulfonated monomer, a crosslinking agent and a photoinitiator, the membrane is prepared through steps of immersion or coating, ultraviolet light irradiation polymerization, ultrapure water post-treatment and NaCl solution stabilization. The chelating agent can form a hydrogen bond network with the sulfonated monomer, regulate the viscosity and fluidity of the casting solution, induce the ordered arrangement of the monomer, and also chelate divalent cations to improve the selective separation capacity of the membrane to monovalent and divalent ions. Compared with the prior art, the application solves the problems of slow ion transmission, difficult control of surface morphology, difficult balance of ion permeability and selectivity, and complex and expensive preparation of a commercial cation exchange membrane. The prepared cation exchange membrane has an ion exchange capacity of 2.5-3.0 meq / g, a thickness of 20-30 nm, and has the advantages of low cost, good ion transmission and ion selectivity.

The present invention discloses a polymer-coated separator having secondary aggregates, a method for manufacturing the same, and a battery. The polymer-coated separator comprises a separator substrate and a polymer coating applied to at least one side of the separator substrate, wherein the polymer coating comprises a plurality of randomly distributed spray points, and the spray points comprise a plurality of polymer secondary aggregates formed by the aggregation of primary polymer particles. Any spray point within the polymer coating satisfies the conditions 25 ≤ A / B ≤ 40000 and 100 ≤ C / A ≤ 10⁶, where A represents the projected area of ​​the polymer secondary aggregates on the separator substrate, B represents the projected area of ​​the polymer primary particles on the separator substrate, and C represents the projected area of ​​the spray point on the separator substrate. The present invention provides a coated separator that combines high adhesion, high ion permeability, high liquid absorption and retention, and a low powdering rate by controlling the size of the polymer secondary aggregates and the size distribution of the secondary aggregates within the spray point.

The invention provides a preparation method of a binaphthalene-biphenyl vanadium redox flow battery proton exchange membrane material, and belongs to the field of vanadium redox flow battery diaphragm materials. Sulfonated binaphthol and biphenyl in different proportions are used as comonomers, the comonomers and 5-fluoroisatin are subjected to an acid catalysis condensation polymerization reaction, and the structural formula is shown in (I). Trifluoroacetic acid and trifluoromethanesulfonic acid are adopted as heterogeneous solvents and catalysts of polymerization reaction, polycondensation and introduction of sulfonic acid groups are completed in one step, reaction conditions are mild, subsequent sulfonation treatment is not needed, the yield is high, and the cost is low. The ion exchange membrane prepared from the copolymer has excellent proton conduction channel and efficient vanadium ion screening capability. And in an all-vanadium redox flow battery performance test, high proton conductivity, low vanadium ion permeability and relatively high coulombic efficiency and energy efficiency of the battery are shown, and the application prospect is relatively wide.

This invention discloses a ternary lithium battery separator slurry and its preparation method, belonging to the field of lithium battery technology. It comprises the following raw materials in parts by weight: 50-70 parts composite binder, 200-300 parts N-methylpyrrolidone, 0.4-0.6 parts modified graphene oxide, 60-65 parts aromatic additives, 2-5 parts ceramic powder, and 300-400 parts DMF. The preparation method includes the following steps: dissolving the composite binder in N-methylpyrrolidone, then adding modified graphene oxide, reacting, precipitating with methanol and filtering, washing and drying the filter residue with methanol and water, then dissolving it in DMF, and ultrasonically obtaining the ternary lithium battery separator slurry. The composite binder is used to improve the thermal stability of the polymer, and its incompatibility with aromatic additives and the addition of modified graphene oxide can improve the ion permeability of the lithium battery.