532 results about "Composite electrolyte" patented technology

The invention relates to a composite solid electrolyte membrane with high ceramic content and a preparation method and application thereof. The preparation method comprises the following steps: mixing ceramic solid electrolyte particles activated by a silane coupling agent with an in-situ polymerization solution containing a cross-linking agent, an organic monomer, a plasticizer, a lithium salt, an ultraviolet light initiator and a thermal initiator to form solid electrolyte slurry, wherein the ceramic solid electrolyte particles account for 60-90% of the total mass of the composite solid electrolyte membrane; the preparation method comprises the following steps: coating a positive pole piece with solid electrolyte slurry, initiating shallow organic matter monomers and a cross-linking agent to generate in-situ polymerization through an ultraviolet light initiator, covering a negative pole piece for hot pressing treatment, initiating residual organic matter monomers and the cross-linking agent to generate in-situ polymerization through a thermal initiator, and forming a composite electrolyte membrane with high ceramic content. The invention also discloses an all-solid-state battery containing the composite solid electrolyte membrane. The solid-state battery containing the in-situ formed composite solid-state electrolyte membrane has relatively high cycling stability.

The invention belongs to the technical field of new energy, and discloses a preparation method and application of a LiaMXb-based composite solid electrolyte membrane, and the preparation method comprises the following steps: S1, carrying out spray drying on a mixed solution in which a Li source, an M source and an ammonium salt are dissolved, placing the mixed solution in a crucible of which the bottom is paved with the ammonium salt, and annealing for 2-10 hours at 350-800 DEG C in an inert atmosphere to obtain a LiaMXb solid electrolyte; s2, mixing the LiaMXb solid electrolyte with a fluorine-containing monomer A and a dispersing agent, and performing spray drying to obtain electrolyte powder wrapped by the fluorine-containing monomer A; s3, ball-milling and uniformly mixing the electrolyte powder wrapped by the fluorine-containing monomer A, a lithium salt, a thermal curing agent and a monomer B in an inert atmosphere to obtain composite electrolyte powder; and S4, carrying out cold isostatic pressing and hot pressing curing on the composite electrolyte powder to prepare the LiaMXb-based composite solid electrolyte membrane. The prepared LiaMXb-based composite solid electrolyte membrane not only has excellent air stability, flexibility and machinability, but also has a continuous three-dimensional ion conduction path, and the assembled all-solid-state lithium battery has good electrochemical performance.

The invention provides an aerogel reinforced composite electrolyte thin film for a solid-state lithium battery and a preparation method of the aerogel reinforced composite electrolyte thin film, and belongs to the technical field of composite electrolytes.The thin film comprises a three-dimensional porous aerogel skeleton, a solid-state electrolyte compound and lithium salt nanocrystals; wherein the three-dimensional porous aerogel skeleton is prepared from inorganic oxide nanoparticles and a polymer precursor through a sol-gel method; pores of the three-dimensional porous aerogel skeleton are filled with the solid electrolyte compound, the solid electrolyte compound comprises lithium lanthanum zirconium oxide nanowires and a polyoxyethylene-lithium salt composite matrix, and the lithium lanthanum zirconium oxide nanowires are directionally arranged in the thickness direction of the film; the lithium salt nanocrystals grow on the surface of the pore wall of the three-dimensional porous aerogel in situ; the mass ratio of the aerogel skeleton to the solid electrolyte compound is (1: 3)-(1: 15). According to the thin film, the ionic conductivity, the mechanical strength and the interface stability of the electrolyte are remarkably improved.

The invention discloses a high-modulus leather / eutectic gel composite electrolyte and a preparation method and application thereof, and belongs to the technical field of energy storage. The preparation method comprises the following steps: 1) preparing a eutectic gel solution containing polyvinyl alcohol, zinc salt, small molecular polyol and water; 2) carrying out vacuum impregnation to obtain leather fibers containing a eutectic gel solution; and (3) obtaining the leather / eutectic gel composite electrolyte with the imitated reinforcing steel bar-concrete structure through freeze-thaw circulation.The composite electrolyte effectively solves the problem that an existing gel electrolyte is low in modulus and difficult to effectively deal with extreme mechanical deformation, and the cycle life of the water-based zinc ion battery is remarkably prolonged.

The invention discloses a preparation method of a solid-state battery unit and a solid-state battery containing a composite multifunctional electrolyte layer, multifunctional integration of a single-layer electrolyte is realized through a composite material system, and compared with a traditional PE / PP diaphragm system, the proportion of an inorganic material in the composite electrolyte layer is greater than 90%, and the composite electrolyte layer has excellent high-temperature resistance and can be used for preparing a solid-state battery. And the structural integrity is kept when the battery is possibly subjected to thermal runaway. The localized adding mode of the ionic liquid and the conductive salt is optimized, and high-temperature degradation is avoided; the manufacturing process is simplified, tight interface contact between the electrolyte layer and the electrode is ensured, and impedance is reduced. Compared with a traditional liquid lithium ion battery, the solid-state battery prepared by the invention has the liquid content of less than 1%, and has high safety and cycle performance. The problems that an electrolyte layer in a traditional solid-state battery is single in function (for example, only ion conduction is concerned), the interface impedance is large, the thermal stability is poor, and the mechanical strength is insufficient are mainly solved, and the comprehensive performance and safety of the battery are improved.

The invention relates to the technical field of battery solid electrolyte, in particular to a method for constructing polyethylene oxide-based composite solid electrolyte by sub-nanowires. According to the specific technical scheme, the method comprises the following steps: (1) sub-nanowire surface grafting modification: dispersing sub-nanowires in a weak polar solvent, then adding a sulfhydryl compound and a photoinitiator, and reacting for 4-10 hours under the conditions of ultraviolet irradiation and ice bath; and (2) construction of the composite solid electrolyte: dissolving polyethylene oxide, a lithium salt and the sub-nanowire modified in the step (1) in a polar solvent, uniformly stirring, casting to form a film, and drying at normal temperature. According to the invention, the problems of poor filler dispersity, low size matching degree, insufficient interfacial compatibility and the like in the traditional composite electrolyte are solved.

The invention provides a copper-nickel alloy foil and a preparation method and application thereof, and belongs to the technical field of lithium ion battery negative electrode current collectors, and the preparation method comprises the following steps: preparing a copper-nickel composite electrolyte, and adding a coordination agent, a pH buffer agent and an additive into the copper-nickel composite electrolyte to obtain a mixed electrolyte; the coordination agent comprises a main coordination agent and an auxiliary coordination agent, and the main coordination agent comprises at least one of trisodium citrate, potassium sodium tartrate and sodium pyrophosphate; the auxiliary coordination agent comprises at least one of ammonia water, glycine and triethanolamine; and a cathode and an anode are placed in the mixed electrolyte, the pH of the mixed electrolyte is controlled to be 6-10, direct current is applied for electrochemical deposition, and the copper-nickel alloy foil is obtained. According to the method, the alkalescence system is adopted, the main coordination agent and the auxiliary coordination agent are used, full coordination of free Cu < 2 + > and Ni < 2 + > is achieved, precipitation is avoided, the hydrogen evolution phenomenon is greatly reduced, and the alloy foil quality is improved.

The invention relates to a surface-coated oxide solid electrolyte and a preparation method thereof, the surface-coated oxide solid electrolyte comprises an oxide electrolyte and a surface coating layer, the chemical formula of the oxide solid electrolyte is Li7-xLa3Zr2MxO12-x (M = Ta, Nb, Hf, Ge, Sc, Ti, Al, Si, Sn, Y, 0 < = x < = 1), the chemical formula of the surface coating layer is LiXON (R = Ta, Nb, Al, Zr, Ga, In, N = F, Cl, Br, I), and a lithium source, a lanthanum source, a zirconium source, an M source, an X source and an N source, or an XN source are connected in series, garnet solid electrolyte powder with a stable surface coating layer is obtained by adopting a solid phase method or a sol-gel method and combining a low-temperature calcination process; and then mixing and reacting with a lithium salt and a polymer electrolyte, and pouring the obtained slurry on a polyfluortetraethylene plate to prepare the composite electrolyte. Compared with the prior art, the high-ion conductor layer formed on the surface of the product in situ constructs a rapid transmission channel for lithium ion transmission in the composite electrolyte, and high ion conductivity is achieved.

The invention belongs to the field of solid-state batteries, and particularly relates to a solid-state battery and a composite electrolyte, preparation and application thereof, and the preparation method of the composite electrolyte comprises the following steps: dissolving a base membrane polymer with a solvent A to obtain a base membrane solution, and forming the base membrane solution into a wet membrane; pre-forming the wet film in an environment with the humidity of 50-80% RH in advance; soaking the wet film in a solvent B, and forming the wet film into a base film; and compounding the base membrane and a precursor solution for forming the electrolyte, and then carrying out in-situ polymerization to prepare the composite electrolyte, wherein the base membrane polymer comprises at least one of polyether sulfone, sulfonated polyether sulfone and polyetherimide; the solvent B is a mixed solvent of water and C1-C4 alcohol, and the volume ratio of the water to the C1-C4 alcohol is 1: (0.1-10); the precursor solution is a solution containing a monomer, a plasticizer and electrolytic salt. The method provided by the invention can be used for preparing the solid electrolyte with a special structure and excellent performance such as fast charge stability.

The invention belongs to the technical field of battery diaphragm materials, and particularly relates to a composite diaphragm, a preparation method, a battery and application of the battery. The composite diaphragm comprises a base membrane and a first coating coated on one surface of the base membrane, the porosity of the composite diaphragm is 45%-87%; the raw material of the first coating comprises a first active material, and the first active material comprises a composite electrolyte material; the composite electrolyte material comprises the following raw materials: a solid electrolyte, an organic ligand and a lithium supplement agent. The composite diaphragm has good liquid absorption rate and thermal stability, and can meet the requirements of rapid charging and discharging of the battery.

The invention provides a multifunctional carbon fiber lithium battery based on a sulfide composite electrolyte membrane and a preparation method and application of the multifunctional carbon fiber lithium battery, and belongs to the technical field of lithium batteries and functional composite materials. According to the invention, a nitrogen phosphide interface layer is constructed on the surface of a sulfide electrolyte membrane or a nitrogen phosphide derivative is dispersed in a bulk phase, so that the stability of an electrolyte and a metal lithium interface is effectively improved, and lithium dendrites are inhibited; and by combining the multifunctional characteristics of the carbon fiber and glass fiber woven cloth, high specific energy and light weight can be realized, the overall safety and mechanical strength are enhanced, and the composite material is suitable for various high-performance energy storage occasions.

The invention discloses a preparation method of a solid-state polymer composite electrolyte material and application of the solid-state polymer composite electrolyte material in an all-solid-state battery, and relates to the technical field of all-solid-state lithium ion batteries, and the preparation method comprises the following steps: firstly synthesizing a skeleton filler, adding an acid solution, and then carrying out ultrasonic treatment, soaking, centrifuging and washing to obtain an acid-modified skeleton filler; dispersing the acid-modified skeleton filler in an organic solution, adding a lithium salt, stirring, centrifuging, and washing to obtain a lithiated skeleton filler; weighing an electrolyte salt, adding the electrolyte salt into the polymer precursor, adding the lithiated skeleton filler, uniformly mixing, and drying to obtain a dried product; and finally, rolling the dried product into a thin film to obtain the solid polymer composite electrolyte thin film. According to the preparation method of the solid polymer composite electrolyte material, the ionic conductivity and Li < + > transference number of a solid polymer composite electrolyte thin film prepared by inducing polymer precursor polymerization through cations and compounding the inorganic filler at normal temperature are superior to those of a commercial PP film and a poly N, N-dimethylacrylamide film.

The invention relates to the technical field of sodium ion batteries, and discloses a low-overpotential uniform sodium deposition composite electrolyte and a preparation method of a sodium metal battery, the composite electrolyte comprises a sodium salt, a solvent, a film-forming additive and a sodium deposition regulating agent; the film forming additive is selected from at least one of NaPO2F2, NaDFOB and Na2SO3; the sodium deposition regulating agent is selected from at least one of CsTFSI, SnCl2 and Bi (OTf) 3. Through the synergistic effect of the film-forming additive and the sodium deposition regulating agent, a stable and firm SEI film can be formed on the interface of the negative electrode current collector, the overpotential of sodium deposition is obviously reduced to 20 mV or below, the growth of sodium dendrites is effectively inhibited, and dense and uniform deposition of sodium is realized. The negative-electrode-free sodium metal battery based on the composite electrolyte shows high first efficiency (greater than or equal to 90%), high coulombic efficiency (greater than 99.5%) and excellent cycling stability, and an effective scheme is provided for solving the core challenge of a sodium metal negative electrode.

The invention discloses a wide-temperature-range high-rate semi-solid lithium iron phosphate battery and a preparation method thereof, and belongs to the technical field of batteries, the wide-temperature-range high-rate semi-solid lithium iron phosphate battery comprises a positive electrode material, a negative electrode material, a diaphragm and an electrolyte; the positive electrode material comprises a positive electrode active material, a first conductive agent, a positive electrode binder and a graphene-coated aluminum foil current collector; the negative electrode material comprises a negative electrode active substance, a second conductive agent, a negative electrode binder and a graphene-coated aluminum foil current collector; the diaphragm is a single-side-coated ceramic diaphragm; the electrolyte comprises an organic solvent, a composite electrolyte and a composite additive. The positive electrode material adopts an active substance composed of lithium-aluminum-titanium-phosphorus and lithium iron phosphate, the active substance and the lithium iron phosphate have a synergistic effect, and are matched with the first conductive agent conductive carbon black, the positive electrode binder and the graphene-coated aluminum foil current collector, so that the stability of a positive electrode interface can be enhanced, and the lithium-aluminum-titanium-phosphorus lithium-iron-phosphate battery can be effectively improved at different temperatures. Especially at high temperature, the electrolyte solvent can be inhibited from oxygenolysis on the surface of the positive electrode, and generation of corrosive gas and loss of active substances are reduced.

The invention discloses a preparation method and application of a composite solid electrolyte containing a bifunctional multi-walled carbon nanotube, and the preparation method comprises the following steps: reacting a multi-walled carbon nanotube with nitric acid to obtain a multi-walled carbon nanotube rich in oxygen-containing functional groups; adsorbing a polar functional group by using the carbon nanotube to obtain a bifunctional multi-wall carbon nanotube; and mixing the bifunctional multi-walled carbon nanotubes with an electrolyte dispersion liquid, drying the mixture to obtain a composite electrolyte dispersion liquid, and drying the composite electrolyte dispersion liquid to obtain the composite solid electrolyte. The bifunctional multi-walled carbon nanotube can accelerate ion migration in the tube, so that a stable electrode / electrolyte interface layer is constructed, oxygen-containing functional groups and polar groups promote release of more free lithium ions, and the migration rate of the lithium ions in the electrolyte is improved. The contact interface between the solid electrolyte and the electrode can be effectively improved, and the ion transmission efficiency between the electrolyte and the electrode can be improved, so that the cycle performance is improved.

The invention discloses a method for preparing an hBN ceramic coating on the surface of a SiCp / 2024Al substrate, and belongs to the technical field of surface treatment. The invention discloses a method for preparing an hBN ceramic coating on the surface of a SiCp / 2024Al substrate. The method comprises the steps that the SiCp / 2024Al substrate is polished and ground and then dried after being subjected to ultrasonic cleaning; adding sodium silicate, sodium hydroxide, the hexagonal boron nitride nano-powder and a surface active component into deionized water, and performing ultrasonic dispersion to obtain a composite electrolyte; placing the composite electrolyte in a stainless steel electrolytic bath, and connecting the stainless steel electrolytic bath to a power supply cathode of a plasma discharge system; the pretreated SiCp / 2024Al substrate is connected to the positive electrode of a power source of a plasma discharge system and immersed in the composite electrolyte; and the plasma discharge system operates, under the action of positive and negative pulses, the nano-particles are driven to migrate to the surface of the SiCp / 2024Al substrate and participate in reaction co-deposition, and the compact and uniform large-thickness high-electrical-insulation hBN ceramic coating grows on the surface of the substrate.

The invention relates to the field of batteries, in particular to a negative plate, a preparation method thereof and a battery. The negative plate comprises a current collector, a first coating, a second coating and a third coating, wherein the first coating comprises a graphite material coated with a carbon material; the second coating comprises a tin-based material coated with a conjugated polymer; and the third coating comprises a composite electrolyte, and the composite electrolyte comprises an oxide solid electrolyte and a polymer electrolyte. The preparation method of the negative plate comprises the following steps: coating a current collector with first slurry to form a first coating; coating the first coating with second slurry to form a second coating; and spraying the third slurry on the second coating to form a third coating so as to obtain the negative plate. The negative plate provided by the invention can improve the energy density performance, long cycle life performance and rapid charging performance of the battery, realizes consideration of high gram volume and dynamic performance, and also has relatively good safety performance.

The invention discloses a preparation method of a poly (1, 3-dioxolame)-based composite electrolyte, and belongs to the technical field of sodium ion batteries. The preparation method comprises the following steps: adding a sodium salt and a 1, 3-dioxolame monomer into a solvent, then mixing with an additive to obtain a precursor, and carrying out standing and polymerization curing treatment to obtain the poly (1, 3-dioxolame)-based composite electrolyte. According to the invention, the polymerization curing time of the precursor is greatly shortened by optimizing a solvent system; the additive is introduced into the precursor, the additive comprises a cross-linking agent and / or an inorganic filler, the cross-linking agent is trimethylolpropane triglycidyl ether, and the inorganic filler is NASICON type solid electrolyte powder, so that the ionic conductivity of the poly (1, 3-dioxolame)-based composite electrolyte is effectively improved, and the service life of the poly (1, 3-dioxolame)-based composite electrolyte is prolonged. And the cycling stability and the first-cycle discharge specific capacity of the assembled battery are remarkably improved.

The invention relates to a high-voltage polyoxyethylene (PEO)-based solid electrolyte and a preparation method thereof, and belongs to the technical field of solid-state battery materials. The electrolyte is composed of a polymer substrate, an inorganic filler, a cosolvent and a lithium salt, the polymer substrate is a PEO-polyacrylonitrile (PAN) composite substrate; the inorganic filler is lithium titanium aluminum phosphate LATP, and the cosolvent is fluoroethylene carbonate FEC; the lithium salt is lithium bis (trifluoromethanesulfonic acid) imide LiTFSI and lithium difluoro (oxalato) borate LiDFOB; the dispersing agent is acetonitrile ACN. The method has the advantages that PEO and FEC are complexed to form a new structure, and room-temperature efficient operation of a single-salt (LiTFSI) system is realized; and meanwhile, LiDFOB is cooperatively introduced to construct a stable passivation layer on a positive electrode interface, FEC synchronously induces to generate LiF-rich stable SEI on a lithium negative electrode, and the interface compatibility and electrochemical stability of the electrolyte to a high-voltage electrode are remarkably improved.

The present invention provides a carbon fiber, a preparation method thereof and an application thereof, relating to the technical field of carbon fiber surface modification. The present invention provides a carbon fiber preparation method, which comprises the following steps: using a polyacrylonitrile precursor as a raw material to prepare a graphitized fiber, and then successively performing electrochemical oxidation surface treatment and sizing on the graphitized fiber to obtain a carbon fiber; wherein, the electrochemical oxidation surface treatment includes: successively performing a primary surface treatment and a secondary surface treatment on the graphitized fiber, the primary surface treatment uses an alkaline electrolyte with hydroxide radicals, and the secondary surface treatment uses a composite electrolyte of ammonium acetate and ammonium dihydrogen phosphate. The present invention adopts two-stage surface treatment to remove the weak layer on the fiber surface and then increase the oxygen-containing functional groups and nitrogen-containing functional groups on the fiber surface, which can improve the interfacial performance of the carbon fiber.

The invention discloses a composite solid positive electrode, a battery cell, a single battery and electric equipment. The positive electrode is composed of a current collector, a positive active material, an electronic conductive agent, a solid electrolyte and an interface modifier. Wherein the positive active material is used for providing a lithium source; the electronic conductive agent is used for reducing ohmic internal resistance and polarization; the solid electrolyte is used for transmitting ions, and the interface modifier is used for further reducing internal resistance and polarization. When the solid electrolyte is a composite electrolyte of sulfide and a polymer, the infiltration problem of a solid-solid interface and the deformation problem caused by charging and discharging can be solved due to the existence of the interface modifier. The positive electrode material can be applied to battery systems such as liquid, solid and alkali metal batteries.

The application belongs to the technical field of sodium ion battery materials, and particularly relates to a preparation method of an organic PSF modified NZZSP electrolyte material and application research of the sodium ion battery. The preparation method of the NASICON type solid-state composite electrolyte material can include the following steps: preparing a doped modified NASICON electrolyte sheet through a high-temperature solid-phase synthesis method, and then constructing an organic PSF interface coating layer on the surface of the modified NASICON electrolyte sheet through an in-situ polymerization method. The organic PSF modified NZZSP electrolyte prepared in the application effectively improves the electrochemical performance of the sodium ion battery, wherein the in-situ polymerized organic PSF modification coating layer can effectively improve the electrolyte / electrode interface contact, and can form a stable and uniform electrolyte / electrode interlayer. 2+ Partially doped and substituted Zr 4+ The Si / P ratio and Zn Benefiting from the synergistic effect of the two, the prepared organic PSF modified NZZSP electrolyte exhibits excellent capacity retention rate and cycle stability in the sodium ion battery.

The invention discloses an aluminum alloy hard oxidation process, and relates to the technical field of aluminum alloy part surface treatment, the aluminum alloy hard oxidation process comprises the following steps: S1, pretreatment: oil removal, alkali corrosion treatment and acid pickling neutralization; s2, hard oxidation is conducted, specifically, the pretreated workpiece is put into an oxidation tank with electrolyte and a stirring system to be subjected to stirring and oxidation treatment; and S3, post-treatment: cleaning with hot water, sealing with nickel acetate and drying in a drying oven. The process mainly comprises the following steps: carrying out pretreatment of oil removal by an organic solvent, alkali etching and acid pickling, combining sulfuric acid-citric acid-monopotassium phosphate composite electrolyte, pulsed power supply and gradient boosting oxidation, carrying out ultrasonic stirring and precise temperature control hard oxidation, and finally carrying out nickel acetate sealing aftertreatment. The four industrial problems of poor batch consistency of oxidation films of aluminum alloy workpieces, non-uniformity of complex workpieces, high energy consumption and poor compatibility to high alloy materials are thoroughly solved, and the oxidation film which is high in hardness, uniformity and corrosion resistance and saves energy is obtained.

The invention provides a composite electrolyte film and a preparation method thereof and a secondary battery, and belongs to the field of lithium battery, the composite electrolyte film comprises a polymer matrix, and a lithium salt and a composite material distributed in the polymer matrix, the composite material comprises a porous oxide solid electrolyte and a halide solid electrolyte filled in pores of the porous oxide solid electrolyte. The invention aims to provide the solid electrolyte with high ionic conductivity, wide electrochemical window and good mechanical property.

The invention belongs to the technical field of battery technologies, and provides nanowire solid-state composite electrolyte slurry and a preparation method and application thereof.The nanowire solid-state composite electrolyte slurry comprises inorganic ceramic nanowires, a high-molecular polymer material, lithium salt, ionic liquid and an organic solvent, the diameter of the inorganic ceramic nanowires is 220-260 nm, the inorganic ceramic nanowires are arranged in the nanowire solid-state composite electrolyte slurry in a disordered mode, and the inorganic ceramic nanowires are arranged in the high-molecular polymer material. In the solid-state battery, the nanowire solid-state composite electrolyte slurry is attached to two sides of a diaphragm in the form of a membrane. According to the nanowire solid-state composite electrolyte slurry disclosed by the invention, the nanowire filler with a high aspect ratio is utilized to optimize an inner interface of the solid-state composite electrolyte, so that the electrolyte has the advantages of relatively good thermal stability, electrochemical stability and high ionic conductivity, and is easy to form and process; the solid-state composite electrolyte is a novel solid-state composite electrolyte with excellent comprehensive performance, can be matched with lithium metal and a high-voltage positive electrode to construct a solid-state lithium battery with high specific energy and high safety, and is high in use value and good in application prospect.

The invention discloses an anodic oxidation method for improving the uniformity of a dielectric layer of a capacitor. The anodic oxidation method comprises the following steps that a tantalum block is pretreated and then placed in an electrolytic bath; adding electrolyte into the electrolytic bath, and performing oscillation circulation through an oscillator; a tantalum block is sequentially subjected to a pre-oxidation procedure, a main oxidation procedure, a stabilization procedure, heat treatment and constant-pressure treatment, the tantalum block is taken out after treatment is finished, and the tantalum block is cleaned and dried to finish anodic oxidation. The ultrasonic oscillator is additionally arranged in the electrolytic bath, so that the electrolyte concentration gradient can be eliminated, and the thickness uniformity of the dielectric layer is improved. And by adding ammonium dihydrogen phosphate, micropores are filled, the surface of the tantalum block is passivated, and the performance of a capacitor prepared from the tantalum block is improved. Through a staged dynamic oxidation method and a composite electrolyte formula, the uniformity and reliability of a tantalum oxide dielectric layer are remarkably improved, and the method is suitable for industrial production of a high-reliability tantalum capacitor.

The invention discloses an aluminum alloy plasma micro-arc oxidation nano-reinforced composite ceramic layer and a preparation method thereof. The method comprises the following steps: pretreating an aluminum alloy sample, and sealing and storing for later use; tetraethoxysilane is added into the basic electrolyte; after tetraethoxysilane is completely hydrolyzed, firstly adding a nano enhancer, then adding nano rare earth oxide powder, and stirring to enable the uniformity of the solution to be consistent; the prepared electrolyte is poured into a micro-arc oxidation electrolytic tank, the standby aluminum alloy sample is placed in the electrolytic tank and connected with the positive electrode of a micro-arc oxidation power source, stainless steel serves as a negative electrode, and micro-arc oxidation treatment is conducted in a constant-voltage mode; and the aluminum alloy sample obtained after micro-arc oxidation treatment is taken out of the electrolytic tank, and cleaning and airing are conducted in sequence. The aluminum alloy is subjected to micro-arc oxidation treatment by adopting the composite electrolyte of the phosphate basic electrolyte, the organic silicon solution and nano strengthening, a formed film layer shows excellent corrosion resistance and high hardness, the binding force between the film layer and a matrix is high, and the density is high.

The utility model belongs to the technical field of batteries, and particularly discloses an aqueous zinc ion battery which comprises a shell and a battery cell arranged in the shell, the battery cell comprises a positive electrode structure, a negative electrode structure, a diaphragm structure and ZnCl2 / ZnSO4 composite electrolyte, the diaphragm structure is arranged between the positive electrode structure and the negative electrode structure, and the ZnCl2 / ZnSO4 composite electrolyte is arranged in the shell. And the ZnCl2 / ZnSO4 composite electrolyte is poured between the positive electrode structure and the negative electrode structure. According to the aqueous zinc ion battery provided by the utility model, the positive electrode structure consists of the positive electrode current collector and the positive electrode active material layer, the positive electrode active material layer is in close contact with the positive electrode current collector, and the connecting bulge serves as a connecting framework of the positive electrode current collector and the positive electrode active material layer, so that active materials can be effectively prevented from falling off from the positive electrode current collector, and the stability of the positive electrode structure is improved; the negative electrode structure is composed of the conductive polymer coating and the negative electrode active material layer, the conductive polymer coating is beneficial to uniform deposition of zinc ions, and formation of zinc dendrites can be effectively reduced.

The invention provides a method for preparing a solid-state composite electrolyte membrane by using fluorine-containing MOFs as a filler, and belongs to the field of lithium ion battery solid-state electrolyte. The method comprises the following steps: dissolving a polymer, a lithium salt and functionally modified fluorine-containing MOF in an organic solvent, and mixing and stirring to obtain mixed slurry; the functional modified fluorine-containing MOF is selected from one or more of UIO-66-F4, UIO-66-F2, UIO-66-CF3, MOF-OTf or UIO-66-Hf, and the functional modified fluorine-containing MOF is selected from one or more of UIO-66-F4, UIO-66-F2, UIO-66-CF3, MOF-OTf and UIO-66-Hf. And coating the obtained mixed slurry on a substrate at a constant speed, and drying to obtain the solid-state composite electrolyte membrane. The functional modified fluorine-containing MOF is introduced into the polymer solid electrolyte as a filler, so that the crystallinity of the polymer can be effectively reduced, and the dynamic performance of a polymer chain is improved.

The invention discloses a composite electrolyte and a preparation method and application thereof. The composite electrolyte comprises a lithium salt, a solvent, a Lewis acid precursor, a Lewis acid trapping agent and a thermal response monomer, the mass content of the Lewis acid precursor is 0.1-5%, the mass content of the Lewis acid trapping agent is 2-5%, and the mass content of the thermal response monomer is 5-30%. The composite electrolyte can be rapidly polymerized at high temperature, so that the thermal stability of the electrolyte is improved, an ion transmission path is cut off, meanwhile, the composite electrolyte can be stably kept in a liquid state in a non-high-temperature environment, the electrochemical performance of the composite electrolyte is not influenced, and the composite electrolyte can be compatible with various storage and use environments; the problems of gas production and fire in the thermal runaway process of the battery can be remarkably inhibited, the safety of the battery is improved, and the electrical performance of the battery in a normal operation state is not influenced.