1001results about "Zirconium compounds" patented technology

The invention relates to the technical field of lithium ion batteries, and provides a lithium cobalt oxide composite material which comprises a core body and a coating layer coating the core body, the core body comprises O2-phase lithium cobalt oxide, and the O2-phase lithium cobalt oxide is doped with an element M; the coating layer comprises an oxide containing an N element; the M element comprises at least one of Al, Mg, W, Ti, La, Zr, Ni, Mn and Y; n comprises at least one of Al, Mg, Y, W, Nb, La, Zr, Ti and P. The lithium cobalt oxide composite material provided by the invention is used as a positive electrode material of a lithium ion battery, and the cycling stability of the lithium ion battery under high potential is improved.

A solid electrolyte material includes a solid electrolyte and an oxide material. The solid electrolyte includes Li, M, O, and X. M is at least one selected from the group consisting of Nb, Ta, and Zr. X is at least one selected from the group consisting of F, Cl, Br, and I. The oxide material includes at least one selected from the group consisting of oxides of divalent metal elements and oxides of trivalent metal elements. The mass proportion of the oxide material to the solid electrolyte is 1% or more and 50% or less. A battery includes a positive electrode, a negative electrode, and a solid electrolyte layer disposed between the positive electrode and the negative electrode, and at least one selected from the group consisting of the positive electrode, the negative electrode, and the electrolyte layer contains the above solid electrolyte material.

The invention provides a coated modified high-nickel ternary positive electrode material, a preparation method and a lithium ion battery, the coated modified high-nickel ternary positive electrode material comprises a high-nickel ternary matrix and a coating layer containing an oxide solid electrolyte, the coating layer is coated outside the high-nickel ternary matrix and accounts for 1%-3% of the mass of the high-nickel ternary matrix; the oxide solid electrolyte comprises Li < 3x > La < 2 / 3-x > TiO < 3 > (0 lt; x < = 0.16), Li < 7 > La < 3 > Zr < 2 > O < 12 >, Li < 1 + y > Al < y > Ti < 2-y > (PO < 4 >) < 3 > (0 lt; y < = 0.5); the ionic conductivity of the oxide solid electrolyte is greater than or equal to 1 * 10 <-4 > S / cm. The selected oxide solid electrolyte has high ionic conductivity and electronic insulativity, a rapid lithium ion transmission channel can be provided, interface side reaction can be inhibited, the rate capability and the cycling stability of the material can be remarkably improved, and when the oxide solid electrolyte forms a coating layer, the coating layer is not prone to deformation, and the service life of the material is prolonged. The interface bonding strength with a high-nickel ternary matrix can be improved through chemical bonding, the interface impedance can be remarkably reduced, and the dynamic performance of the material is improved.

The invention relates to a lithium manganese iron phosphate positive electrode material and a preparation method thereof, a positive plate and a battery, and belongs to the technical field of methods or devices for directly converting chemical energy into electric energy. The lithium manganese iron phosphate positive electrode material comprises an inner core, a first coating layer arranged on the surface of the inner core and a second coating layer arranged on the surface of the first coating layer, the inner core is lithium manganese iron phosphate I, the first coating layer comprises lithium manganese iron phosphate II, and the second coating layer comprises a carbon material and an inorganic solid electrolyte. The lithium manganese iron phosphate positive electrode material not only can endow a battery with relatively high energy density, but also can endow the battery with excellent cycle performance.

The invention discloses a double-site doped titanium lithium ion sieve adsorbent as well as a preparation method and application thereof. The adsorbent is a lithium removal product of a double-site doped titanium lithium ion sieve adsorbent precursor, the chemical general formula of the double-site doped titanium lithium ion sieve adsorbent precursor is Li (2-x) MxTi (1-y) NyOz, M is at least one of Na < + >, K < + >, Zn < 2 + >, Co < 2 + >, Ni < 2 + >, Mg < 2 + > and Al < 3 + > and occupies Li site, N is at least one of Cr < 3 + >, Fe < 3 + >, Zr < 4 + >, Nb < 5 + >, Ta < 5 + >, V < 5 + >, Mo < 6 + > and W < 6 + > and occupies Ti site, x is larger than or equal to 0.001 and smaller than or equal to 0.5, and y is larger than or equal to 0.001 and smaller than or equal to 0.5. Metal cations are introduced to replace Li sites and Ti sites at the same time, Li site substitution enlarges interlayer spacing and improves Li < + > diffusion rate, Ti site substitution regulates local chemical bond and electron distribution, stabilizes lattice structure and enhances electron conduction, and through double-site doping, 'ion-electron 'double channels are constructed, so that a collaborative optimization effect is achieved. The double-site doped titanium lithium ion sieve adsorbent disclosed by the invention is applied to adsorption and extraction of lithium in a Bayer process sodium aluminate solution, and the adsorbent shows excellent adsorption performance.

The invention provides a positive electrode active material as well as a preparation method and application thereof. The positive electrode active material comprises secondary particles consisting of primary particles, each primary particle comprises an inner core and a carbon coating layer arranged on at least part of the surface of the inner core; the inner core comprises a solid solution formed by lithium iron manganese phosphate and lithium manganate; the primary particles comprise primary particles A and primary particles B, the particle size of the primary particles A is 50-200nm, and the median particle size D50 is 80-120nm; the particle size of the primary particles B is 400-800 nm, and the median particle size D50 is 500-600 nm. The positive electrode active material has relatively high powder compaction density and ion transmission capability, and the electrochemical performance and energy density of the lithium ion battery can be effectively improved.

The invention belongs to the technical field of halide solid-state electrolyte, and relates to a high-conductivity and high-lithium-stability modified halide solid-state electrolyte material constructed by solid source plasma, and a preparation method and application of the high-conductivity and high-lithium-stability modified halide solid-state electrolyte material. According to the preparation method, a halide solid electrolyte is taken as a matrix, halogenated ammonium salt is taken as a solid source, and the halide solid electrolyte is subjected to synergistic doping modification of elements such as nitrogen, fluorine / chlorine / bromine and the like by utilizing a plasma technology, so that the modified halide solid electrolyte material is obtained. The modified halide solid electrolyte material shows excellent conductivity and lithium-lithium symmetrical battery performance, and has a wide market application prospect. Meanwhile, the preparation method provided by the invention is simple, rapid, efficient and convenient, is easy to control, and contributes to promoting the development and application of the high-performance halide solid electrolyte material.

The invention provides a surface-modified sulfide electrolyte and a preparation method thereof, and an all-solid-state battery, the surface-modified sulfide electrolyte comprises a sulfide electrolyte and a modification layer coated on the surface of the sulfide electrolyte, the chemical general formula of the modification layer is LiaMbNcXd, 0 < = a < = 3, 0 < = b < = 1, 0 < = c < = 1, 0 < = d < = 6, and 0 < = c < = 1. M is at least one element of magnesium, aluminum, calcium, iron, zirconium, niobium, tantalum, tungsten, gadolinium, yttrium, indium, hafnium, lanthanum and ytterbium, and X is at least one element of oxygen, sulfur, fluorine, chlorine, bromine and iodine. According to the surface-modified sulfide electrolyte, the modification layer with high ionic conductivity and high oxidation potential is coated outside the sulfide electrolyte, so that when the surface-modified sulfide electrolyte is applied to a positive electrode of an all-solid-state battery, the modification layer can improve the oxidation potential of the electrolyte on the premise of not reducing the ionic conductivity of the electrolyte; the effects of improving the interface stability between the positive electrode active material and the sulfide electrolyte and further improving the cycle performance of the battery are achieved.

The invention provides a positive electrode active material and a preparation method thereof, a sodium ion battery and electric equipment, and belongs to the technical field of positive electrode active material manufacturing. The positive electrode active material comprises an inner core, a first shell layer and a second shell layer. The material of the inner core comprises Naa1Nib1Fec1Mnd1O2, and a1 is more than or equal to 0.75 and less than or equal to 0.85; the first shell layer is further doped with an element B, the material of the first shell layer comprises Naa2Nib2Fec2Mnd2BfO2, a2 is larger than or equal to 0.85 and smaller than or equal to 0.95, and a2 is not equal to a1; and the second shell layer is an inorganic metal oxide layer. The sodium ion battery prepared from the positive electrode active material has relatively high first discharge capacity and relatively excellent storage performance, cycle performance and rate capability.

A negative electrode for a solid electrolyte battery includes a negative electrode active material, a first compound, and a second compound, wherein the first compound is AaEbGcXd . . . (1), the second compound is different from the first compound, and is at least one of LiX . . . (2) and LiaEbFgXd . . . (3), in Formulae (1) to (3), A is Li, or Li and Na or Ca, E is at least one element selected from the group consisting of Al, Sc, Y, Zr, Hf, and lanthanoids, G is a predetermined group, X is at least one element selected from the group consisting of F, Cl, Br, and I, and 0.5≤a<6, 0<b<2, 0.1<c≤6, 0<d≤6.1, 0.5≤e<6, 0<f<2, 1.3≤g≤6.1, and 0≤h≤6.1 are satisfied.

The invention relates to the technical field of lithium ion batteries, in particular to a composite lithium-rich manganese-based positive electrode material and a preparation method and application thereof. The composite lithium-rich manganese-based positive electrode material is of a three-layer structure and sequentially comprises a lithium-rich manganese-based oxide positive electrode material matrix, a first coating layer and a second coating layer from inside to outside, the first coating layer is a mixture of halide solid electrolyte and lithium-containing oxide; and the second coating layer is an oxide solid electrolyte. The conductivity of a contact interface with a positive electrode material can be improved, the resistance is reduced, the moisture absorption degradation of halide is inhibited, the packaging difficulty is reduced, and the cycle performance of the halide-added solid electrolyte after moisture absorption is improved.

A positive electrode material includes: a positive electrode active material; a coating layer covering at least part of the surface of the positive electrode active material; and a second solid electrolyte. The coating layer includes a first solid electrolyte. The first solid electrolyte includes Li, M1 and F. M1 is at least one selected from the group consisting of Ti, Al and Zr. The second solid electrolyte includes Li, M2, O and X. M2 is at least one selected from the group consisting of Ta and Nb. X is at least one selected from the group consisting of F, Cl, Br and I.

The invention discloses a sodium-ion battery positive electrode material and a preparation method thereof, a positive plate and a negative-electrode-free sodium-ion battery, and relates to the technical field of sodium-ion batteries. According to the sodium battery positive electrode material provided by the invention, the inner layer is the layered oxide, the outer layer is the sodium-lanthanum-zirconium-oxygen coating layer, and the dissolution phenomenon of Fe < 3 + > in the layered oxide material can be relieved by utilizing the sodium-lanthanum-zirconium-oxygen coating layer; the sodium lanthanum zirconium oxide material belongs to a solid electrolyte and is a fast ion conductor of sodium ions, so that the injection amount of the electrolyte can be reduced, the growth of dendritic crystals can be reduced, the safety performance of the battery can be improved, and the capacity exertion of the active material can be improved. Based on the advantages, the sodium battery positive electrode material provided by the invention can improve the safety and the cycle life of the battery.

The invention discloses a modified mesoporous silica adsorbent as well as a preparation method and application thereof, and relates to the technical field of porous material preparation. The preparation method of the modified mesoporous silica adsorbent provided by the invention comprises the following steps: hydrolyzing a silicon source in a solution containing a template agent to form a preliminary framework of silica, then adding a silane coupling agent containing at least one of sulfydryl, sulfonyl and amino, carrying out a hydrothermal reaction at 60-120 DEG C, and removing the template agent to obtain the modified mesoporous silica adsorbent. The modified mesoporous silica adsorbent capable of selectively adsorbing zirconium and hafnium can be obtained. The modified mesoporous silica adsorbent prepared by the method is used for adsorbing and enriching zirconium and hafnium ions, the adsorption capacities of 6.23 mg / g and 5.95 mg / g or above can be obtained respectively, the adsorption capacity is excellent, and the adsorbent can reach adsorption equilibrium within 10 min and is excellent in adsorption rate.

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a preparation method of an ultrahigh nickel positive electrode material, which comprises the following steps: S1, mixing a ternary precursor with a cerium source and a lithium source, and obtaining Ce-NCM by a high-temperature solid-phase method; s2, carrying out ball-milling mixing on a lanthanum source, a zirconium source and other metal sources, carrying out heat treatment after mixing to obtain doped La2Zr2-xMxO7, and carrying out ball-milling to obtain nanoscale La2Zr2-xMxO7 ion conductor powder; s3, uniformly mixing and stirring the Ce-NCM and the organic coating medium solution, adding the mixture into a second solvent for mixed precipitation, filtering, washing and drying to obtain a positive electrode material Ce-PNCM; and S4, mixing the nanoscale La2Zr (2-x) MxO7 ion conductor powder prepared in S2 with a positive electrode material Ce-PNCM through a high-speed mixer, and carrying out secondary heat treatment under the condition of protective gas to obtain the cerium-doped double-coating-layer ultrahigh nickel positive electrode material. The positive electrode material prepared by the method disclosed by the invention is low in surface soluble lithium residual quantity, high in surface coating uniformity, good in electrochemical stability, good in cycle performance and high in charge-discharge capacity.

The invention belongs to the technical field of solid electrolytes, and relates to a selenium-doped sulfide solid electrolyte as well as a preparation method and application thereof. The general chemical formula of the sulfide solid electrolyte is Li < 6 + / -iP < 1-x > MxS < 5-y > SeyX, i is greater than or equal to 0 and less than 1, x is greater than 0 and less than 1, y is greater than 0 and less than 1, M is one or more of Zr, Ta, Nb, Mo, Bi, In and Y, and X is one or more of Cl, Br and F. According to the invention, the selenium element with larger ionic radius and lower electronegativity is introduced to replace the sulfur element, and Zr, Ta, Nb, Mo, Bi, In or Y elements are introduced, so that the doped sulfide solid electrolyte system has excellent stability to air, organic solvents and lithium while ensuring high ionic conductivity, and the assembled all-solid-state battery shows excellent cycle stability.

The invention relates to the technical field of batteries, in particular to a composite positive electrode material, a preparation method thereof and a battery. The composite positive electrode material comprises a positive electrode substrate, a fast ion conductor layer and a halide layer, the positive electrode substrate comprises a doped lithium cobalt oxide material; the fast ion conductor layer is positioned on the surface of the positive electrode substrate and comprises an oxide of a metal element Q with a spinel phase; the halide layer is located on the surface of the fast ion conductor layer and comprises element lithium, metal element M and halogen X. Through coordination and cooperation of the matrix material, the fast ion conductor layer and the halide layer, the structural stability and the surface morphology of the material can be effectively improved, the defects of the material are overcome, and the composite positive electrode material has excellent conductivity and has excellent cycling stability and rate capability at high temperature and / or high voltage, so that the battery has high safety performance.

The production device comprises a base, a reaction barrel is fixedly arranged on the base, a mounting frame is fixedly arranged on the outer side of the reaction barrel, a motor is fixedly connected to the top end of the mounting frame, and a stirring device for stirring basic zirconium sulfate and tartaric acid is arranged in the reaction barrel. The feeding parts are sequentially added into the reaction barrel, and a discharging part for discharging reacted liquid is arranged in the reaction barrel; through the staggered and periodic coincidence design of discharging grooves of the inner barrel and the outer barrel in the feeding part, the rotating rod is matched to drive the outer barrel to spirally move downwards, accurate and quantitative adding of the basic zirconium sulfate solution is achieved, meanwhile, the adding time and flow of the tartaric acid solution are automatically controlled through magnetic ring adsorption of the upper barrel and the outer barrel and stored energy release of the first spring, and the feeding efficiency is improved. Manual intervention is reduced, efficiency loss caused by step-by-step feeding is avoided, and the preparation efficiency of the water repellent agent is remarkably improved.

The invention discloses a method for ultrafast synthesizing pyrochlore type and perovskite type oxides based on Joule heat, which comprises the following steps of: firstly, obtaining a solid precursor by adopting a coprecipitation method, then quickly heating the solid precursor to 700-800 DEG C by using a Joule heat shock technology, cooling to room temperature, and circulating heating-cooling operation for a plurality of times to prepare a series of pyrochlore type (A2B2O7) and perovskite type (ABO3) oxides; the synthesis time is extremely short (lt; the method has the advantages of high yield (more than 2500g / h), high energy efficiency and potential to realize the purpose of high-flux synthesis, and has a good industrial production basis and a wide application prospect.

The invention relates to a purple-light-excited blue-light fluorescent material for a sunlight-like LED (light-emitting diode) as well as a preparation method and application of the blue-light fluorescent material. The chemical expression of the fluorescent material is Ca2LuZr2Al1. 5Ga1. 5O12: xCe < 3 + >, wherein x is more than or equal to 0.02 and less than or equal to 0.07. The blue light fluorescent material for the purple light excitation type sunlight LED is a brand new and unreported purple light excitation Ce < 3 + > doped oxide blue light emission fluorescent material, the fluorescent powder has a wide excitation band, the effective absorption range covers 300-450 nm, the fluorescent powder can be excited by purple light, and blue light with the central wavelength being 485 nm is emitted. The fluorescent powder has the advantage of stable physical and chemical properties, can be prepared by adopting a conventional solid-phase reaction method, has the characteristics of simple preparation process and facilitation of industrial production, and can be used as a good candidate material for wide application of a next-generation full-spectrum illumination white light LED (light-emitting diode). The fluorescent powder can be completely and well matched with the existing purple light chip, meets the commercial market requirements, and is suitable for application of white light LEDs, sunlight-like LEDs, full-spectrum LEDs and the like.

The invention discloses a halide electrolyte electrode material, a composite positive electrode, an all-solid-state battery and a preparation method of the all-solid-state battery. The chemical formula of the halide electrolyte electrode material is Li Zr T < c > Cl < d >, the preparation method of the halide electrolyte electrode material comprises the following steps: mixing titanium chloride, zirconium chloride and lithium chloride according to a stoichiometric ratio to obtain precursor powder, and placing the precursor powder in a first protective atmosphere for ball milling to obtain premixed amorphous precursor powder; and placing the premixed amorphous precursor powder in a second protective atmosphere, and calcining at 200-400 DEG C, thereby obtaining the product. And mixing the halide electrolyte with commercial lithium iron phosphate and conductive carbon to obtain the composite positive electrode. The all-solid-state battery assembled based on the positive electrode material shows higher energy density. The material provided by the invention has good structural stability and excellent charge-discharge cycle performance.

The invention belongs to the technical field of zirconium oxychloride preparation, and relates to a method and device for alkali fusion continuous production in the zirconium industry, and the method comprises the following steps: in a closed space, adding a certain amount of alkali metal hydroxide into an alkali fusion pan, preheating for 10-20 minutes at 350-450 DEG C, then heating for 10-40 minutes at 550-650 DEG C, and then cooling to room temperature to obtain the zirconium oxychloride. The method comprises the following steps of: adding zircon sand into an alkali fusion pot according to the ore-alkali mass ratio of 1: (1.2-1.5), adding the zircon sand for 10-20 minutes, keeping the temperature at 600-650 DEG C for 20-60 minutes, and finally cooling the alkali fusion pot to 50 DEG C within 120-240 minutes. The device comprises a tunnel kiln, and a preheating section, a heating section, a feeding section, a heat preservation section and a cooling section are arranged in the tunnel kiln. According to the invention, the labor intensity of workers can be reduced, the working environment can be improved, and the production efficiency and the zircon sand conversion rate can be improved.

A preparation method of zirconium carbonate with high zirconium dioxide content comprises the following steps: (1) dissolving zirconium oxychloride in pure water to obtain a zirconium oxychloride solution; (2) adding anhydrous sodium sulfate into the zirconium oxychloride solution according to the proportion of SO4 < 2-> mol / ZrO2 mol = 0.6-0.8, and reacting to generate zirconium sulfate; carrying out solid-liquid separation and washing the separated zirconium sulfate; (3) adding zirconium sulfate into pure water, and dissolving to obtain a zirconium sulfate solution; preparing a sodium carbonate solution according to the ratio of CO3 < 2-> mol / ZrO2 mol = 0.75-0.82, and reacting to generate zirconium carbonate; carrying out solid-liquid separation and washing zirconium carbonate; (4) adding zirconium carbonate into pure water, and dissolving to obtain a zirconium carbonate solution; adding concentrated nitric acid into the zirconium carbonate solution to adjust the acid and remove sodium ions until the pH value of the zirconium carbonate solution is maintained at 3.2-4.2; and carrying out solid-liquid separation and washing the zirconium carbonate to obtain the required zirconium carbonate product. By adopting the method disclosed by the invention, the zirconium carbonate product with high ZrO2 content and high CO2 content can be stably prepared, and the yield is high.

Protonic ceramic electrochemical cells (PCECs) can be employed for power generation and sustainable hydrogen production. Achieving high energy efficiency and long-term durability at low operating temperatures is a long-standing challenge in PCEC research. A simple and scalable approach for fabricating ultrathin, chemically homogeneous, and robust protonconducting electrolytes and demonstrate an in-situ formed composite positive electrode, Bao.62Sr0.38Co03-8-Pr1.44Bao.11Sro.45Co1.32Feo.6s06-6, which significantly reduces ohmic resistance, positive electrode-electrolyte contact resistance, and electrode polarization resistance. The PCECs attain high power densities in fuel cell mode and exceptional current densities in steam electrolysis mode.

The invention discloses a magnetoplumbite type oxide and a preparation method and application thereof, and the preparation method comprises the following steps: S1, dissolving rare earth nitrate, transition metal nitrate and Al (NO3) 3 in deionized water to obtain a mixed nitrate solution; s2, adding citric acid monohydrate into the mixed nitrate solution, heating and stirring, and evaporating to obtain transparent gel; s3, the gel is dried, and loose and porous dry gel is obtained; s4, carrying out first high-temperature treatment on the xerogel in an air atmosphere under the condition of 650-950 DEG C to prepare a precursor; and S5, grinding and pulverizing the precursor, grinding and uniformly mixing the precursor and the soluble salt, and carrying out secondary high-temperature treatment in the air atmosphere at 1500-2000 DEG C to prepare the magnetoplumbite type oxide. The preparation method is low in cost, simple and easy to implement and wide in application range, and when the prepared magnetoplumbite type oxide is applied to a lithium-sulfur battery, the performance of the battery can be improved.

The invention discloses an oxide solid electrolyte coated lithium manganese iron phosphate positive electrode material and a preparation method thereof, and relates to the technical field of lithium manganese iron phosphate preparation. The lithium manganese iron phosphate battery comprises a lithium manganese iron phosphate core and an oxide solid electrolyte coating layer, the oxide solid electrolyte coating layer comprises Li < 7 > La < 3 > Zr < 2 > O < 12 > (LLZO), Li < 6.75 > La < 3 > Zr < 1.75 > Ta < 0.25 > O < 12 > (LLZTO, Li < 3 > x La < 2 / 3-x > TiO < 3 > (LLTO), Li < 3 > BO < 3 > (LBO) and Li < 1 + x > Al < x > Ti < 2-x > (PO4) < 3 > (LATP); the lithium manganese iron phosphate core is LiMnxFe1-xPO4, wherein x is more than or equal to 0.5 and less than or equal to 0.8; the existing main problem of lithium manganese iron phosphate is solved, the comprehensive performance is improved, and the commercial application is promoted.

The invention provides a coated modified positive electrode material precursor, which comprises a positive electrode material precursor and a coating material coated on at least part of the surface of the positive electrode material precursor, and the coating material is tungsten modified calcium zirconate. Tungsten-modified calcium zirconate is provided to perform coating modification on the positive electrode material precursor, so that the negative influence on the specific discharge capacity can be reduced while the cycling stability of the positive electrode material is obviously improved, the service life of the secondary battery is effectively prolonged, and the safety and reliability of the battery are improved.

To provide a conductive paste for an internal electrode of a layered ceramic capacitor, which is capable of maintaining relatively high coverage even if the internal electrode constitutes a thin layer.SOLUTION: Provided is a conductive paste for forming internal electrodes 4 and 5 of a layered ceramic capacitor 1 fabricated through a firing step. The conductive paste includes conductive metal powder, ceramic powder, an organic solvent, and an organic binder. The conductive metal powder contains a silver / palladium alloy. At least a portion of the ceramic powder comprises an ABO3 type oxide having a specific ion radius in which the ratio of the ion radius in the 6-coordination of an element at the A site in ABO3 with respect to the ion radius in the 6-coordination of a metal element contained in the conductive metal powder is 0.96 or more and 1.10 or less.SELECTED DRAWING: Figure 1

To provide a highly dispersible sol containing metal oxide particles and a plurality of polymerizable functional group-containing silanes, and a varnish containing a thermosetting or photocurable resin using the same.　Provided is a metal oxide sol containing a silane compound and metal oxide particles, wherein the silane compound is represented by formula (1): (in formula (1), R1 each independently represent an alkoxy group, an acyloxy group, or a halogen group; R2 each independently are an alkyl group having 1 to 10 carbon atoms or an aryl group having 6 to 30 carbon atoms; R3 is a hydrogen atom or a methyl group; A1 is an alkylene group; A2, A3, and A4 each independently are a methylene group or an oxygen atom; one of A2, A3, and A4 is an oxygen atom; and n is an integer of 1 to 3.). The varnish contains the metal oxide sol and a thermosetting or photocurable resin. The varnish is used for nanoimprinting.

The invention belongs to the field of battery materials, and particularly relates to a high-adhesion battery diaphragm binder, slurry, a diaphragm and a preparation method of the high-adhesion battery diaphragm binder, and the high-adhesion battery diaphragm binder based on an acrylate copolymer is prepared through a specific reaction. And then, mixing the binder with two inorganic nano materials, namely a lithium-doped aluminum borosilicate nanowire and a sulfo-functionalized lithium zirconate titanate nanosheet, boehmite and / or aluminum oxide and the like, so as to prepare the high-adhesion diaphragm coating slurry. Wherein the nanowires provide mechanical enhancement and chemical crosslinking points, and the nanosheets improve the interface adhesion and the ionic conductivity. And finally, coating the slurry on the surface of a polypropylene diaphragm, and performing multi-stage drying and heat treatment to obtain the composite diaphragm. The diaphragm has extremely high coating bonding strength, excellent electrolyte wettability and good thermal dimensional stability and ionic conductivity, and is particularly suitable for high-energy-density lithium ion batteries and sodium ion batteries.