279 results about "Dioxolane" patented technology

The invention provides a gel-state polymer electrolyte as well as a preparation method and application thereof, and belongs to the field of batteries. The gel-state polymer electrolyte provided by the invention comprises the following preparation raw materials: a polar organic solvent, a lithium salt, a lithium salt additive, a liquid flame retardant, a liquid monomer and an initiator, the polar organic solvent comprises 1, 3-dioxolame and ethylene glycol dimethyl ether; the dosage ratio of the lithium salt to the polar organic solvent is 1 mmol: (0.5-2) mL; the mass of the lithium salt additive is 1.5-5% of the total mass of the lithium salt and the polar organic solvent; the volume of the liquid flame retardant is 10-20% of the volume of the polar organic solvent; the volume of the liquid monomer is 10-20% of the volume of the polar organic solvent; the mass of the initiator is 0.5-2% of the total mass of the lithium salt, the polar organic solvent and the monomer. And Li < + > in the lithium salt is released after the type of the solvent is adjusted, so that the Li < + > transference number and the ionic conductivity are improved.

The invention provides a preparation method of a covalent organic framework material and application of the covalent organic framework material in a tin-air battery, and the preparation method comprises the following steps: dispersing 2, 2 '-bis (trifluoromethyl) diaminobiphenyl in a mixed solution of 1, 3-dioxolane and ethylene glycol dimethyl ether to obtain a solution I; 2, 4, 6-triformyl phloroglucinol is dispersed in a tetraethylene glycol dimethyl ether solution, and a solution II is obtained; dripping the solution I on a polished tin sheet; after the solution is volatilized, dripping the solution II at the same position; reacting at room temperature for 12 hours, washing with a tetrahydrofuran solution for one time, and washing with a mixed solution of 1, 3-dioxolane and ethylene glycol dimethyl ether for 1-3 times; and then carrying out vacuum drying at room temperature for 8-12h, and finally preparing the covalent organic framework material on the tin sheet. According to the invention, an in-situ preparation method is adopted, the covalent organic framework film and the tin anode are compounded together, and the tin anode is separated from the electrolyte by the film, so that the corrosion of the electrolyte to the anode in room-temperature and high-temperature environments can be reduced, and the formation of by-products and dead tin on the surface of the anode is reduced to improve the battery performance.

The present invention relates to the technical field of lithium ion battery manufacturing, and in particular to an in-situ gel polymer electrolyte and its preparation method and application. It includes: dissolving lithium salt in a mixed organic solvent of 1,3-dioxolane and carbonate organic matter, stirring and mixing evenly under the conditions of room temperature, inert gas protection and a rotation speed of 100 to 1000 rpm; dissolving additives in an electrolyte, stirring under the conditions of room temperature, inert gas protection and a rotation speed of 100 to 1000 rpm; adding an initiator, stirring under the conditions of room temperature, inert gas protection and a rotation speed of 100 to 1000 rpm to obtain an in-situ gel polymer electrolyte. The advantages are: the initiator triggers the in-situ polymerization of 1,3-dioxolane, forms a gel polymer electrolyte in situ in the battery, improves the compatibility of the interface, and reduces the battery impedance; forms a stable interface film, improves the stability of the electrode interface, and improves the room temperature rate performance and low temperature performance of the battery.

The invention discloses a phenanthridine-6-formaldehyde derivative and a preparation method and application thereof.The preparation method comprises the steps that 2, 4, 5, 6-tetra (9-carbazolyl)-isophthalonitrile serves as a photocatalyst, 1-azabicyclo [2.2. 2] octane serves as a hydrogen atom transfer catalyst, a biphenyl isocyanide compound, the photocatalyst, the hydrogen atom transfer catalyst and an alkali additive are jointly dissolved in 1, 3-dioxolane, the mixture is stirred to be uniform, and the phenanthridine-6-formaldehyde derivative is obtained. And carrying out free radical tandem cyclization and acid-catalyzed hydrolysis reaction to obtain the phenanthridine-6-formaldehyde derivative. The invention also provides a specific reaction equation. According to the developed synthesis method of the phenanthridine-6-formaldehyde derivative, the compound can be efficiently and conveniently prepared, the technical bottlenecks of harsh reaction conditions and tedious steps in a traditional process are successfully overcome, raw materials which are low in price and easy to obtain are adopted, operation is carried out under mild conditions, the synthesis method has the outstanding advantages of being high in yield, safe and simple to operate, environmentally friendly and the like, and the method is suitable for industrial production. Good industrial application potential is shown.

The present disclosure provides for improved compositions of ionizable lipid nanoparticles for the delivery of therapeutic nucleic acids to cells. Anionic phospholipids, including phosphatidylserine and phosphatidylglycerol are included in the lipid nanoparticles to increase the transfection efficiency in human dendritic cells. The further incorporation of mono-unsaturated alkyl chain analogs in dimethylaminopropyl-dioxolane or heterocyclic ketal ionizable lipids in the formulation demonstrated high levels of transfection in human dendritic cells, compared to other ionizable lipids in the same family, and demonstrated good stability to oxidative damage. Finally, the use of an ammonium salt of phosphatidylserine allows for the efficient production of PS-targeted LNPs.

The invention belongs to the field of membrane materials, and particularly relates to a polyether-based block copolymer and a preparation method and carbon capture application thereof. According to the invention, dichloromethane is taken as a solvent, trifluoromethanesulfonic acid is taken as an initiator, and in the presence of a chain transfer agent ethylene glycol, 1, 3-dioxolane is subjected to cationic ring-opening polymerization to generate PDXL (HO-PDXL-OH) of which two terminal groups are hydroxyl groups. Further, N, N-dimethylformamide is used as a solvent, dibutyltin dilaurate is used as a catalyst, and HO-PDXL-OH and diphenylmethane diisocyanate are subjected to polycondensation to synthesize block copolymer polyurethane (PU). The polyether-based segmented copolymer prepared by the preparation method disclosed by the invention is used as a gas separation membrane material and has relatively high CO2 capture performance, and the CO2 separation performance of the polyether-based segmented copolymer is superior to that of other polyether-based membrane materials and is close to the Robeson upper limit.

The invention provides a solid-state battery with high safety, flame retardance and long cycle performance and a production method thereof, and the production method comprises the following steps: mixing 1, 3-dioxolame, an initiator, a flame retardant, a lithium salt and a solvent to form an electrolyte for later use; the method comprises the following steps: uniformly mixing various lithium compounds, a conductive agent and a binder to form slurry, coating the slurry on an aluminum foil with a protective film, drying to obtain a positive plate, and processing the positive plate and a negative plate through a lamination or winding process to prepare a battery core; a part of the electrolyte solution is injected into the battery core, the humidity is controlled within 20% RH, the pressure is controlled within 1-3 MPa, standing is carried out for 5-8 h at the specific temperature below 60 DEG C to form a first layer of gel, a second layer of electrolyte is added after standing is carried out for 5 h, and then high-temperature treatment, hot pressing and standing are carried out to obtain the solid-state battery. The solid-state battery provided by the invention has relatively high safety and long cycle stability.

The invention relates to the field of fine chemical engineering, and discloses a novel supported catalyst, a preparation method thereof and a method for preparing 2, 2-dimethyl-1, 3-dioxolane. The novel supported catalyst comprises a chlorite mesoporous composite material and bismuth phosphotungstate supported on the chlorite mesoporous composite material. The average particle size of the chlorite mesoporous composite material is 10-60 [mu] m, the specific surface area is 200-600 m < 2 > / g, the pore volume is 0.8-2 mL / g, the pore diameter is in bimodal distribution, and the first most probable pore diameter and the second most probable pore diameter corresponding to double peaks are 3-6 nm and 18-22 nm respectively; on the basis of the total weight of the catalyst, the content of the chlorite mesoporous composite material is 55-85 wt%, and the content of the bismuth phosphotungstate is 15-45 wt%. The catalyst is used for condensation reaction of acetone and ethylene glycol, and higher 2, 2-dimethyl-1, 3-dioxolane yield can be obtained.

The invention discloses a polymer solid electrolyte, a lithium ion battery and a preparation method. The polymer solid electrolyte comprises a polymer electrolyte, a lithium salt and an additive, the lithium salt initiates the polymer electrolyte to perform in-situ polymerization; the polymer electrolyte is poly (1, 3-dioxolame) obtained by ring opening polymerization of 1, 3-dioxolame. The in-situ polymerization high-concentration salt polymer solid electrolyte has good interface contact with an electrode, so that ion transmission at an interface is optimized; due to poor fluidity of the polymer, a construction site of a solid-state inter-electrolyte phase (SEI) is moved from the surface of an electrode particle to an electrode / electrolyte interface, and the volume change rate is far smaller than that of the surface of the particle, so that the SEI is essentially prevented from bearing huge stress of volume expansion.

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.

A composite electrolyte and a lithium battery. The composite electrolyte comprises a first lithium salt and a composite solvent; the composite solvent comprises ethylene glycol dimethyl ether (DME) and / or 1,3-dioxolane (DOL) and a fluorine-containing ether compound, and the molar ratio of DME and DOL to the fluorine-containing ether compound is 1:0.2-10; the fluorine-containing ether compound is represented by formula R1-O-R2; and in the formula, R1 is a C1-C10 fluoroalkyl or fluoroalkoxyalkyl group, and R2 is any C1-C5 fluoroalkyl or fluoroalkoxyalkyl group. The composite electrolyte can significantly improve the number of cycles and the charge-discharge rate of the lithium metal battery, and improves the performance and safety of the battery.

The invention discloses a low-temperature high-conductivity composite solid-state electrolyte membrane and a preparation method and application thereof, and relates to the technical field of solid-state lithium battery materials, the low-temperature high-conductivity composite solid-state electrolyte membrane comprises: a polymer matrix composed of poly (1, 3-dioxolame) and a polyvinylidene fluoride-hexafluoropropylene copolymer; the ion conduction network is composed of a metal organic framework filler with the surface modified with-SO3Li groups and sulfonic acid lithiated carbon nanotubes arranged in the axial direction of the polymer matrix; a first anti-freezing interface layer and a second anti-freezing interface layer are arranged on the surfaces of the two opposite sides of the polymer matrix, and the first anti-freezing interface layer and the second anti-freezing interface layer are butanedinitrile-glutaronitrile eutectic plastic crystal layers composed of butanedinitrile, glutaronitrile, lithium salt and a nano reinforcing agent respectively. The solid electrolyte is suitable for polar scientific investigation equipment, spacecrafts and other low-temperature environments, and solves the industrial problems of sharp increase of low-temperature grain boundary impedance and interface contact failure of the traditional solid electrolyte.

A solid polymer electrolyte includes a charge transfer complex polymer matrix with a polar ring polymer matrix and an ethylene carbonate-based small molecule additive. In some variations, the ethylene carbonate-based small molecule additive is selected from one or more of ethylene carbonate (O═C1OCCO1) and 4-(fluoromethyl)-5-methyl-1,3-dioxolan-2-one (O═C1OC(C)C(CF)O1).

This application provides a method for preparing compound I-b or a pharmaceutically acceptable salt thereof, wherein (S)-N-methylamino-1-(2-thiophene)-1-propanol reacts with 4-fluorobenzo[1,3]dioxolane in a system containing sodium hydride and potassium benzoate to obtain compound I-b. This method has short steps, mild reaction conditions, and is simple to operate, making it suitable for industrial scale-up; moreover, the obtained product has high purity and low isomer content.

The invention provides a positive electrode material, a positive electrode plate, a preparation method of the positive electrode plate and a solid-state battery. The positive electrode material comprises a positive electrode active material and an organic coating layer coating the surface of the positive electrode active material, and the organic coating layer comprises a copolymer of maleic anhydride and 1, 3-dioxolane. In the positive electrode material, the surface of a positive electrode active material is coated with an organic coating layer, the organic coating layer contains a copolymer of maleic anhydride and 1, 3-dioxolane, and the organic coating layer can realize lithium ion transmission, so that the organic coating layer can form a continuous membrane structure to completely cover the surface of the positive electrode active material; when the positive electrode material is applied to the solid-state battery, the volume of the positive electrode active material can be changed in the charging and discharging process of the solid-state battery, and the organic coating layer can be used for restraining the positive electrode active material and effectively inhibiting the disintegration of the surface structure of the positive electrode active material, so that the stability of a solid-solid contact interface in the solid-state battery is improved.

The invention belongs to the technical field of pharmaceutical chemicals, and particularly relates to a synthetic method of ethylhexylglycerin. The preparation method comprises the following steps: carrying out Williamson reaction on 2-ethylhexyl alkoxide and 4-(chloromethyl)-2, 2-dimethyl-1, 3-dioxolane to obtain 4-[((2-ethylhexyl) oxy) methyl]-2, 2-dimethyl-1, 3-dioxolane, adding an aqueous solution of acid into a system after the reaction is completed, and carrying out ketal removal reaction to obtain ethylhexyl glycerol. According to the ethylhexylglycerin prepared by the synthesis method provided by the invention, the yield is up to 95% or above, and the purity is up to 99.9% or above.

The invention provides a lithium ion battery electrolyte and application thereof, the electrolyte comprises: a non-aqueous solvent, the non-aqueous solvent comprises a first solvent and a second solvent, the first solvent is selected from at least one of perfluorohexanone, decafluoropentane or 2, 2-bis (trifluoromethyl)-1, 3-dioxolane, and the second solvent is selected from at least one of perfluorohexanone, decafluoropentane or 2, 2-bis (trifluoromethyl)-1, 3-dioxolane; a lithium salt; and an additive, the additive comprises a first additive, and the first additive comprises triallyl isocyanurate. According to the lithium ion battery electrolyte and the application thereof provided by the invention, the obtained electrolyte can be applied to a high-energy-density lithium ion battery, the fast charging performance of the lithium ion battery is improved, the cycle performance of the lithium ion battery is improved, and the high-temperature performance of the battery is improved.

The invention discloses an acid-resistant composite membrane as well as a preparation method and application thereof in acid purification, and the preparation method comprises the following steps: performing polymerization reaction on perfluoro-2-methylene-4-methyl-1, 3-dioxolame and chlorotrifluoroethylene in a perfluoro solvent under the action of a catalyst, then preparing a copolymer, the perfluoro solvent and acetone into a composite layer membrane liquid, and performing acid-resistant treatment on the composite layer membrane liquid to obtain the acid-resistant composite membrane. And coating on the surface of the base membrane, and drying. The prepared acid-resistant composite membrane can maintain good stability in strong acid such as hydrofluoric acid, has a high interception effect on acid radical ions and metal ions in a high-acid solution, and can be applied to purification of various acids.

The invention relates to the technical field of lithium ion battery manufacturing, in particular to an in-situ gel polymer electrolyte as well as a preparation method and application thereof. Comprising the following steps: dissolving a lithium salt in a mixed organic solvent of 1, 3-dioxolame and a carbonic ester organic matter, and uniformly stirring and mixing under the conditions of room temperature, inert gas protection and rotating speed of 100-1000r / min; dissolving an additive in the electrolyte, and stirring under the conditions of room temperature, inert gas protection and rotating speed of 100-1000 r / min; and adding an initiator, and stirring under the conditions of room temperature, inert gas protection and rotating speed of 100-1000 r / min to prepare the in-situ gel polymer electrolyte. The method has the advantages that the initiator initiates in-situ polymerization of 1, 3-dioxolame, gel polymer electrolyte is formed in situ in the battery, the compatibility of an interface is improved, and the impedance of the battery is reduced; a stable interfacial film is formed, the stability of an electrode interface is improved, and the room-temperature rate performance and the low-temperature performance of the battery are improved.

The invention relates to an in-situ polymerization dioxolame polymer solid electrolyte, a magnesium fluoride-containing interface layer, a battery and a preparation method thereof, 1, 3-dioxolame, a lithium salt and magnesium-containing montmorillonite are uniformly mixed to obtain a mixed solution, then the mixed solution is immersed into a support body, the support body, a lithium metal negative electrode and a lithium metal positive electrode are matched and assembled into a total battery, and the total battery is obtained after standing for a period of time. And preparing the polymerized dioxolame composite polymer solid electrolyte through an in-situ polymerization reaction. Magnesium ions spontaneously gathered on the surface of montmorillonite compete for coordination with lithium salt anions, the lithium ion coordination environment in the electrolyte is regulated and controlled, and the number of free lithium ions is increased, so that the ionic conductivity of the electrolyte is improved. Besides, magnesium ions and lithium salt anion ligands are decomposed on a positive and negative electrode interface to participate in formation of an interface layer, inorganic-unit-rich interface layers (CEI and SEI) containing magnesium fluoride are generated, high Young modulus and rapid lithium ion transportation kinematics are achieved, rapid transportation of lithium ions is facilitated, stability of the electrolyte and the positive and negative electrode interface is improved, and good application prospects are shown.

The invention discloses a novel solvent system-based low-temperature lithium battery electrolyte and a production process, the novel solvent system-based low-temperature lithium battery electrolyte comprises the following components: a carbonic ester solvent, a lithium salt combination and an additive, the carbonic ester solvent comprises ethylene carbonate, fluoroethylene carbonate, 1, 3-dioxolame and ethyl methyl carbonate, and the lithium salt combination comprises a lithium salt combination and an additive; the lithium salt combination is a mixed system of lithium bis (fluorosulfonyl) imide and lithium hexafluorophosphate, and the additives are vinylene carbonate, succinonitrile, lithium nitrate, triphenyl phosphate and aluminum trifluoromethanesulfonate; according to the low-temperature lithium battery electrolyte, the performance bottleneck of a traditional electrolyte at the temperature of-40 DEG C to-30 DEG C is broken through through multi-level cooperation of solvent-lithium salt-additive preparation of the low-temperature lithium battery electrolyte, the solvent maintains low viscosity while reducing the freezing point, and low-temperature high dissociation and interface stability are achieved through lithium salt compounding; the compatibility of the solid electrolyte interfacial film structure and current collection is finely regulated and controlled through the additive, and the application requirement in the extremely cold environment is met.

The application provides a system and method for integrated acetaldehyde distillation and recovery, which comprises a vertically arranged main tower, the main tower is sequentially divided into a distillation section, a catalytic reaction section, a stripping section and a stripping section from top to bottom, the top of the distillation section is provided with a self-adaptive distributor and a tower top pressure controller, the catalytic reaction section comprises catalytic filler plates and a transverse liquid redistributor, and the catalytic filler plates are loaded with catalysts. The four sections of stripping, stripping, catalytic reaction and distillation are integrated in the vertical main tower, the intermediate cooling and conveying equipment are cancelled, and the investment and energy consumption are significantly reduced. The catalytic reaction section adopts the corrugated filler loaded with catalysts and cooperates with the transverse liquid redistributor, so that the liquid forms thin layer flow, the reaction residence time is effectively prolonged, and the hydrolysis decomposition rate of 2-methyl-1,3-dioxolane (MD) and the acetaldehyde recovery rate are improved.

The present invention provides a composition containing a compound represented by formula (5). The composition further contains 0.00001-1 part by mass of a compound represented by formula (9) and / or 0.00001-1 part by mass of a compound represented by formula (10) per 100 parts by mass of a compound represented by formula (5). In formula (5), R1 represents a fluorine atom or a fluoroalkyl group; in formula (9), two R1 are as defined above; in formula (10), two R1s have the same meanings as described above. # imgabs0 #

Methods for coating electrodes, particularly anodes, more particularly lithium anodes in batteries. The coating material obtained by the methods, involves the ring-opening polymerization of dioxolane (DOL) monomers in presence of suitable polymerization initiators, crosslinkers and optional further additives. The so-obtained coating material displays advantageous features such as fast lithium ions diffusion and high conductivity, high elastic modulus blocking dendrite formation, high flexibility, scalability, controllable thickness of the coating material and homogeneity on the anode surface. The corresponding electrochemical cells and / or batteries comprising the coating material, are characterized by improved stability during the cell / battery cycling.

The invention discloses an electrolyte, a lithium ion battery and an electronic product. The electrolyte comprises electrolyte salt and a solvent; wherein the concentration of the electrolyte salt is 0.1 mol / L-5 mol / L, and the ether solvent comprises one or more of dimethoxymethane, diethoxymethane, 1, 2-diethoxyethane, 1, 3-dioxolane, 1, 3-dioxane, 1, 4-dioxane, tetrahydrofuran, 2-methyltetrahydrofuran, tetrahydropyran, diethyl ether, cyclopentyl methyl ether, triethylene glycol dimethyl ether and tetraethylene glycol dimethyl ether. According to the electrolyte provided by the invention, the ether solvents are reasonably screened, and the ether solvents with relatively weak lithium salt dissolving capacity are selected, so that the electrolyte forms contact ion pairs and aggregation ion pairs at low concentration, and then anion derivative interface chemistry is introduced, and the obtained electrolyte reduces co-intercalation behaviors and is relatively good in stability at low temperature; the method is suitable for low-temperature environments.

The present application relates to a kind of preparation methods of R-(+)-2,2-dimethyl-1,3-dioxolane-4-formaldehyde, belong to the technical field of pharmaceutical intermediates synthesis.In order to solve the existing wastewater pollution and the problem of low selectivity, provide a kind of preparation method of R-(+)-2,2-dimethyl-1,3-dioxolane-4-formaldehyde, the method includes the action of catalytic amount of phase transfer catalyst quaternary ammonium salt and oxidant, the oxidant is selected from PCC or BPCC, in halogenated alkane solvent, substrate formula II compound double ketone-D-mannitol is converted into product formula I compound R-(+)-2,2-dimethyl-1,3-dioxolane-4-formaldehyde by catalytic oxidation reaction.The present application has the effect of high product yield and purity quality, product yield reaches more than 95%, purity reaches more than 99.5%, also greatly reduces the generation of a large amount of wastewater, the advantage of environment-friendly.

The application discloses a kind of in-situ gel preparation methods, belong to lithium metal battery technical field.The method introduces trace initiator to make 1,3-dioxolane DOL in electrolyte occur ring-opening polymerization reaction, by forming DOL crosslinking in advance, realize liquid ether-based electrolyte in-situ solidification on the surface of lithium negative electrode.After forming gel phase, inject electrolyte in soft pack battery of gel phase, construct gel phase@liquid phase two-phase system.By controlling the ratio of electrolyte and poly-DOL, realize the gradient solidification of ether-based electrolyte in battery, adjust the mechanical properties of gel electrolyte.There is intermolecular interaction between poly-DOL and lithium salt anion, significantly improve the ionic conductivity and lithium ion transference number of gel electrolyte, the in-situ gel phase formed has good interface compatibility with lithium negative electrode, and the growth of lithium dendrite is inhibited.This in-situ gel preparation method is low in cost and easy to operate, and is a simple method to realize high capacity and high cycle stability of lithium metal battery.

The invention provides a synthesis method of a quaternary cycloalkane modified O-glucoside compound shown in formula 3, in the presence of a catalyst, a sugar compound shown in formula 1 with exposed hydroxyl and a quaternary tension ring substrate compound shown in formula 2 are subjected to nucleophilic addition reaction in an organic solvent to prepare the quaternary cycloalkane modified O-glucoside compound shown in formula 3: X is H, CF3 or Cl; a is a dioxolane type compound or a pyran type compound; the catalyst is phosphazene base P4-t-Bu, and the specific structural formula is shown in the specification.

An in-situ polymerization dioxolane polymer solid electrolyte, a fluorinated magnesium interface layer, a battery and a preparation method thereof, 1,3-dioxolane, lithium salt and magnesium-containing montmorillonite are uniformly mixed to obtain a mixed solution, then the mixed solution is immersed into a support, matched with a lithium metal negative electrode and a positive electrode to assemble a full battery, and placed for a period of time, and a polymerized dioxolane composite polymer solid electrolyte is prepared through an in-situ polymerization reaction. The magnesium ions spontaneously aggregated on the surface of the montmorillonite compete with the lithium salt anions for coordination, regulate the coordination environment of lithium ions in the electrolyte, increase the number of free lithium ions, and thus improve the ionic conductivity of the electrolyte. In addition, the magnesium ions and the lithium salt anion ligands decompose at the positive and negative electrode interface to participate in the formation of the interface layer, producing an inorganic component-rich interface layer (CEI and SEI) containing fluorinated magnesium, which has a high Young's modulus and fast lithium ion transport kinetics, is beneficial to the rapid transport of lithium ions and improves the stability of the electrolyte and the positive and negative electrode interface, and thus has a good application prospect.

The invention provides an organic-inorganic hybrid solid-state polymer electrolyte coated high-nickel positive electrode material as well as a preparation method and application thereof, and relates to the technical field of all-solid-state lithium batteries. The high-nickel positive electrode material coated with the organic-inorganic hybrid solid polymer electrolyte comprises an inner core and an organic-inorganic hybrid coating layer coated on the surface of the inner core, the inner core is made of a high-nickel positive electrode material; the organic-inorganic hybrid coating layer comprises a ring-opening copolymer of maleic anhydride and 1, 3-dioxolame, and Li3PO4 nanocrystals are embedded into the ring-opening copolymer of maleic anhydride and 1, 3-dioxolame in situ. According to the invention, a flexible and compact coating layer with ionic conductivity is constructed on the surface of the high-nickel positive electrode material, so that the problems of violent interface side reaction, large interface impedance and poor cycling stability existing between the high-nickel positive electrode material and sulfide solid electrolyte are solved; therefore, the electrochemical performance of the material in a sulfide all-solid-state lithium battery is remarkably improved.