44results about How to "Inhibit oxidative decomposition" patented technology

The invention relates to the technical field of carbon fiber reinforced ceramic matrix composites, in particular to a sintering process of a surface-modified short carbon fiber reinforced ceramic matrix composite, which comprises the following steps: surface modification treatment of short carbon fibers, preparation of a ceramic matrix material, mixing of the short carbon fibers and ceramic powder, compression molding and sintering. In the invention, the process is not only suitable for various ceramic matrixes such as aluminum oxide, silicon carbide, silicon nitride, zirconium oxide and the like, but also can flexibly adjust process parameters such as oxidizing agent types, coupling agent treatment time, ceramic powder particle size, forming pressure, sintering temperature and the like, so that customized preparation with different application requirements is realized; the prepared composite material has extremely high toughness, wear resistance and high-temperature resistance, and shows a wide application prospect.

The invention discloses a sintering method of a composite SiC aluminum oxide electrostatic chuck ceramic plate, and belongs to the technical field of electrostatic chucks, the sintering method comprises the following steps: S1, modification and pre-oxidation treatment modification: controlling the residual amount of carbon black in reaction in the process of synthesizing silicon carbide to obtain nano silicon carbide powder with different carbon contents; pre-oxidizing, namely pre-oxidizing the modified silicon carbide, and then annealing and crystallizing under the protection of argon atmosphere; s2, tape casting: carrying out ball milling on the modified nano silicon carbide in a bedroom sand mill, pre-grinding the ball-milled nano silicon carbide powder, a solvent and a dispersing agent in a planetary mill, then mixing and grinding with aluminum oxide powder, finally adding an adhesive for grinding, and carrying out tape casting after grinding to obtain a ceramic green body; and S3, high-temperature sintering is carried out, specifically, a ceramic green body obtained through tape casting is subjected to glue discharging in wet nitrogen, pressurized sintering is carried out in a certain Ar atmosphere in an HP furnace, and the composite SiC aluminum oxide electrostatic chuck ceramic disc is obtained through sintering.

The invention provides a positive electrode material and a preparation method thereof, a positive electrode slurry, a positive electrode plate, a lithium ion battery and a preparation method thereof, the positive electrode material is applied to a battery, the battery comprises an electrolyte, the electrolyte comprises lithium hexafluorophosphate and an organic solvent, the positive electrode material comprises a positive electrode active substance and lithium carbonate, and the organic solvent comprises lithium hexafluorophosphate and lithium carbonate. The lithium carbonate is coated on the surface of the positive active material, and the mass ratio of the positive active material to the lithium carbonate is 1: (0.001-0.03). The surface of the positive active material is coated with a layer of lithium carbonate, the lithium carbonate can react with lithium hexafluorophosphate in electrolyte, and a lithium difluorophosphate coating layer is generated on the surface of the positive active material in situ, so that the addition amount of lithium difluorophosphate in the battery can be effectively increased, and the performance of the battery is improved.

The lithium ion secondary battery comprises a positive plate, a negative plate, electrolyte and a diaphragm, the negative plate comprises a negative current collector and a negative active layer arranged on the negative current collector, the negative active layer comprises a first active layer and a second active layer which are arranged on the surface of the negative current collector, and the second active layer is arranged on the surface, far away from the negative current collector, of the first active layer; the first active layer comprises a first negative electrode active material, and the first negative electrode active material comprises first graphite; the second active layer comprises a second negative electrode active material, and the second negative electrode active material comprises silicon carbon; the electrolyte comprises 1, 3, 6-hexane trinitrile, the mass content of the 1, 3, 6-hexane trinitrile in the electrolyte is 0.5 wt%-10wt%, and the battery provided by the invention has a relatively high cycle capacity retention ratio.

The invention discloses a titanium and titanium alloy cutting tool coating and a preparation method thereof, the titanium and titanium alloy cutting tool coating comprises a coating substrate and a double-layer coating deposited on the substrate, and the double-layer coating sequentially comprises a base layer and a functional layer from the substrate side to the surface side of the double-layer coating. The base layer is composed of a metal compound TiBx, and the functional layer is composed of a metal compound TaSiy. The titanium and titanium alloy cutting tool coating provided by the invention has relatively high wear resistance, high temperature resistance, oxidation resistance and bonding resistance, the bonding strength between the coating and a matrix is good, the production process is simple, the production cost is low, and the titanium alloy cutting efficiency can be effectively improved.

The invention relates to the technical field of circuit board processing, in particular to an efficient environment-friendly acidic degreaser and a preparation method thereof. An efficient environment-friendly acidic degreasing agent is prepared from the following preparation raw materials in parts by mass: 30-40 parts of inorganic acid, 12-15 parts of a corrosion inhibitor, 40-50 parts of a wetting agent, 10-12 parts of an emulsion stabilizer, 8-10 parts of isoeugenol, 15-18 parts of plant degreasing liquid and 850-870 parts of deionized water. The efficient and environment-friendly acidic degreaser has a rapid and excellent degreasing effect, can effectively protect metal on the surface of a circuit board and improve the binding force of a plating layer, has the characteristics of good high and low temperature stability, environmental protection, simple preparation method, low production cost, excellent comprehensive performance and the like, and is suitable for electroplating acidic degreasing procedures of various circuit boards.

The invention discloses a low-yellowing ultraviolet-resistant epoxy resin composition and a preparation method thereof, and relates to the technical field of composite materials, and the low-yellowing ultraviolet-resistant epoxy resin composition comprises the following components: 50-60 parts of solid epoxy resin, 10-40 parts of liquid epoxy resin, 0.1-5 parts of a UV absorbent, 0.1-5 parts of a heat stabilizer, 3-10 parts of dicyandiamide, 3-10 parts of an accelerant and 0.01-1 part of an auxiliary agent. The preparation method comprises the following steps: pouring the solid epoxy resin and the liquid epoxy resin into a stirring tank, stirring at 100 DEG C until the epoxy resin is molten, cooling to 65 DEG C, adding the UV absorbent and the heat stabilizer, and uniformly stirring to prepare the component A; dicyandiamide, an accelerant, liquid epoxy resin and an auxiliary agent are additionally stirred and subjected to three-axis grinding to serve as a component B; according to the low-yellowing ultraviolet-resistant epoxy resin composition and the preparation method thereof, a certain low-yellowing curing effect can still be achieved by adding a stabilizer into common latent curing agents such as dicyandiamide and organic urea.

The invention discloses a local high-concentration high-voltage electrolyte, a preparation method and a battery, and belongs to the technical field of electrolytes. The local high-concentration high-voltage electrolyte comprises a sodium salt, a first solvent and a second solvent, the first solvent comprises carbonic ester, the second solvent comprises at least one of a fluoroether solvent and a fluorobenzene solvent, the first solvent and the second solvent are mutually soluble, the solubility of the sodium salt in the first solvent is defined as S1, the solubility of the sodium salt in the second solvent is defined as S2, and S1 is larger than S2. According to the electrolyte, the overall salt concentration can be reduced, the viscosity of the electrolyte can be reduced, the wettability of the electrolyte can be improved, so that the conductivity of ions is improved, in addition, oxygenolysis of the first solvent can be slowed down, and furthermore, the second solvent has high oxidation resistance and oxidation resistance, so that the service life of the electrolyte is prolonged. And the oxygenolysis of the electrolyte under a high-voltage condition can be inhibited, so that the cycling stability of the battery can be improved, the battery capacity is improved, and the battery is suitable for a high-voltage application scene.

The invention relates to a herbicide composition and a preparation method thereof, and relates to the technical field of agricultural herbicides, and the herbicide composition is prepared from the following raw materials in parts by mass: 40-50 parts of a herbicide drug-loading system, 3-5 parts of carbon black, 0.5-1 part of an anti-ultraviolet agent, 0.5-1 part of an antioxidant, 5-15 parts of a compound high-dispersity emulsifier and 10-15 parts of filler. The preparation method comprises the following steps: mixing carbon black, an anti-ultraviolet agent, an antioxidant and a filler, uniformly stirring, adding a herbicide loading system and a compound high-dispersity emulsifier, and uniformly stirring to obtain a mixture; and carrying out mechanical pulverization and airflow pulverization on the mixture, drying, screening and packaging to obtain the herbicide composition. The herbicide composition has the effect of improving the stability of the herbicide composition, the decomposition rate of the herbicide can be effectively reduced, and the weeding effect of the herbicide composition is improved.

The invention provides a preparation method and application of an air-stable sulfide composite electrolyte, and the method comprises the following steps: S1, weighing an M source (M = Cd, Mn and Zn), P2S5 and S powder according to a ratio of 1: 1: 3, adding iodine for catalysis, carrying out heat preservation at 700-720 DEG C for 6-7 days, and carrying out K + insertion, Li + exchange and ultrasonic centrifugation to prepare a LiMyPS3 nanosheet dispersion liquid; s2, dissolving PEO and LiTFSI in acetonitrile to form a film, drying to obtain a pure PEO film, immersing the pure PEO film into a dopamine Tris buffer solution with the concentration of 2 mg / ml and the pH value of 8.5, oscillating for 12-24 hours in an oxygen environment, and washing and drying to obtain a PDA-coated PEO film; and S3, carrying out suction filtration on the LiMyPS3 dispersion liquid to obtain a self-supporting membrane, stacking according to the sequence of "PDA-coated PEO membrane-sulfide membrane-PDA-coated PEO membrane", carrying out isostatic pressing at 10-20 MPa, and then carrying out vertical cutting at 0 DEG C to obtain the 20-30 [mu] m composite membrane. The film has the advantages of good air stability, almost no loss of conductivity after 30 days, room temperature conductivity of 9.2-10.2 ms / cm, excellent interface bonding force and mechanical strength, and stable window of 4.3-4.5 V, is adaptive to a high-voltage positive electrode, and can be used for a high-energy-density solid-state lithium battery.

The invention belongs to the technical field of cosmetics, and particularly relates to a cosmetic composition containing deoxyarbutin and a preparation method of the cosmetic composition. The cosmetic composition is prepared from the following raw materials in percentage by weight: 2%-5% of deoxyarbutin, 9%-20% of polyol, 0.7%-1.5% of a bacteriostatic agent, 50%-75% of nanocellulose hydrogel, 0-5% of a humectant, 0-1% of a thickening agent and the balance of deionized water. According to the invention, oxygenolysis of deoxyarbutin in water is prevented, the texture and the smearing feeling of cosmetics are remarkably improved, the cosmetics can be better attached to skin, the product action time is prolonged, and the action effect and the use comfort feeling are improved.

The invention discloses a low-VOC (volatile organic compound) hot melt adhesive for an automobile air filter and a preparation process. The low-VOC hot melt adhesive is prepared from EVA (ethylene-vinyl acetate) resin, maleated rosin resin, terpene resin, polyethylene wax, a high-temperature-resistant polymer, a silane coupling agent, an antioxidant, an ultraviolet light absorber, a plasticizer and a hydrolysis-resistant agent. The preparation process comprises the following steps: step 1, preparing raw materials; 2, melting the resin; step 3, premixing an auxiliary agent; 4, mixing the raw materials; step 5, melt extrusion; the silane coupling agent, the maleated rosin resin and the terpene resin are added into the formula to improve the bonding performance of the hot melt adhesive, the base resin is modified through the high-temperature-resistant polymer, so that the hot melt adhesive can keep stable performance at a high temperature, the hot melt adhesive is prevented from being oxidized and decomposed through the antioxidant, and the service life of the hot melt adhesive is prolonged. The ultraviolet light absorber is used for enhancing the ultraviolet resistance, the plasticizer is used for enhancing the cold resistance, and the hydrolysis-resistant agent is used for enhancing the moisture resistance, so that the weather resistance and the aging resistance of the hot melt adhesive are improved.

The invention provides an electrolyte of a high-safety sodium ion battery, which comprises the following components: a solvent which takes propylene carbonate (PC) as a main solvent and contains ethylene carbonate (EC) and dimethyl carbonate (DMC); the coalescing agent is fluoroethylene carbonate (FEC) and 1, 3-propane sultone (1, 3-PS); conducting salt: sodium perchlorate (NaClO4); additives: acesulfame sodium and a proper amount of sodium nitrate. The sodium ion battery provided by the invention has more excellent properties.

The invention provides a high-safety high-voltage halogenated ether-phosphate cosolvent electrolyte and a lithium battery. The electrolyte is composed of a lithium salt, a non-aqueous organic solvent and an additive, the lithium battery is obtained by assembling a positive plate, a negative plate, a diaphragm and the electrolyte. The prepared electrolyte can form a compact and stable interface passivation film on the surfaces of the positive electrode and the negative electrode of the lithium battery, oxygenolysis of the electrolyte is effectively inhibited, and interface side reaction is reduced, so that the electrochemical window and the safety of the battery are improved, and the cycle life of the battery at normal temperature and high temperature is prolonged.

This invention provides a method and application for the efficient determination of functional components in Acer truncatum leaves, relating to the field of plant functional component detection technology. The method includes the following steps: (1) two ultrasonic-assisted extractions using 70% methanol, followed by merging the extracts; (2) detection using high-performance liquid chromatography-tandem mass spectrometry. This invention achieves simultaneous, accurate, rapid, and stable detection of multifunctional components in Acer truncatum leaves.

The application belongs to the technical field of lithium ion batteries, and relates to a sulfide solid electrolyte composite oxide positive electrode material and a preparation method and application thereof. The positive electrode material comprises oxide positive electrode particles, a first coating layer coated on the outer side of the oxide positive electrode particles, and a second coating layer coated on the outer side of the first coating layer, wherein the first coating layer is a conductive oxide material, and the second coating layer is a sulfide solid electrolyte material. By constructing a barrier composed of the conductive oxide material between the oxide positive electrode particles and the sulfide solid electrolyte material, the application can effectively prevent the reaction between lattice oxygen released from the oxide positive electrode particles and the sulfide solid electrolyte, effectively avoid the oxidative decomposition of the sulfide solid electrolyte, and further enhance the stability of the interface structure; meanwhile, a good electronic transport channel is formed, which is conducive to the transport of electrons and ions. The positive electrode material has excellent electrical properties and wide market application prospects.

Provided is a method for manufacturing a lithium ion secondary battery capable of inhibiting oxidative decomposition of an ester-based solvent. The method for manufacturing a lithium ion secondary battery of the present invention includes: an electrode body preparation step of preparing an electrode body including a positive electrode and a negative electrode, the positive electrode including a positive electrode mixture containing a positive electrode active material and lithium phosphate; a cell preparation step of sealing the electrode body and a nonaqueous electrolyte solution containing an ester-based solvent in an exterior body to prepare a cell; and an activation step of activating the cell by applying a prescribed voltage under conditions in which the ambient temperature is 0[°C] or lower.

The utility model discloses a cooling liquid collecting cover for a plant negative pressure extractor, which relates to the technical field of plant extraction and comprises a hinge, an extraction box for extracting plant juice under negative pressure is arranged on the hinge, and the cooling liquid collecting cover further comprises a covering mechanism connected with the hinge, a covering mechanism is arranged in the extraction box and used for opening or closing the extraction box and cooling extraction steam, the covering mechanism comprises a fixing ring fixedly connected with the hinge, an arc-shaped cooling shell is fixedly connected to the lower portion of the fixing ring, a hollow shell is fixedly arranged on the upper portion of the fixing ring, and a cooling component is arranged in the hollow shell. And the cooling part is used for cooling the arc-shaped cooling shell, a fixing plate is integrally arranged on the hollow shell, and air holes are formed in the fixing plate. The cooling liquid collecting cover for the plant negative pressure extractor is convenient for condensing plant extraction steam extracted at high temperature, so that the plant extraction efficiency is improved.

The invention provides an electrolyte for a rechargeable lithium battery and a rechargeable lithium battery including the electrolyte. The electrolyte solution includes a non-aqueous organic solvent and a lithium salt, and the non-aqueous organic solvent includes about 10 vol% to about 30 vol% of a compound represented by Chemical Formula 1 based on a total amount of the non-aqueous organic solvent. Chemical formula 1 # imgabs0 #

The invention belongs to the technical field of batteries, and discloses a dual-ion battery and a preparation method thereof. The preparation method comprises the following steps: adding a polymer monomer in a burdening stage, uniformly dispersing the polymer monomer in a positive pole piece and a negative pole piece, finally injecting an electrolyte added with a polymer initiator, and initiating an in-situ polymerization reaction through high temperature, so that the liquid electrolyte is changed into a gel state. The invention also discloses the dual-ion battery prepared according to the method. The polymer monomers are uniformly distributed in the positive and negative pole pieces, so that the binding force of the active substance and the current collector is enhanced, and the pole piece expansion in the battery circulation process is reduced. In addition, the electrolyte is changed into a gel state, so that the oxidation potential of the electrolyte is remarkably improved, the stability of a positive and negative electrode interface is enhanced, the consumption of the electrolyte is reduced, and the safety performance of the battery is improved.

The application discloses an electrolyte and a battery. The electrolyte comprises an electrolyte, a solvent, a first additive and a second additive. The first additive is selected from at least one of structural formula (1) to structural formula (4), and the second additive is selected from at least one of structural formula (5) to structural formula (7). The first additive has high oxidation resistance, and contains an unsaturated double bond which can be polymerized to form an SEI protective film on a negative electrode. The protective film inhibits the volume expansion of the silicon negative electrode. The second additive can form a polymer film on the surface of a positive electrode under high voltage, which can improve the oxidation resistance of the electrolyte. Through the joint action of the first additive and the second additive, a stable film layer is formed on the surface of the electrode, the volume expansion of the electrode is inhibited, the interface on the surface of the electrode is prevented from being damaged by expansion stress, the contact between the electrolyte and the electrode material is blocked, the oxidation resistance of the electrolyte is improved, the performance stability of the battery under high voltage is improved, and the high-temperature storage and cycle performance of the battery are improved.

The invention discloses an anti-aging polyethylene plastic and a preparation method thereof, and relates to the technical field of plastic preparation. The anti-aging agent is prepared through coordination binding of 5-amino-2-mercaptobenzimidazole and selenium dioxide, selenium atoms are introduced, chain reaction is prevented, plastic aging is slowed down, and meanwhile sulfur inhibits pyrolytic reaction and slows down flame propagation speed; then, the mixture participates in dehydration condensation reaction in modified polyethylene to jointly form a cross-linked structure, so that the mechanical strength and the thermal stability of the plastic are remarkably improved. Wherein the modified polyethylene is subjected to double-bond polymerization reaction with 1, 3-butadiene and 1, 5-hexadienol, so that the connection stability is improved, and the strength of the plastic is improved; the strength and toughness of the plastic are remarkably improved, the heat resistance is improved, the plastic can adapt to various environments, abrasion is reduced, the silicon element is heated to form a glassy film or carbon black to cover the surface of the plastic during combustion, heat and oxygen are isolated from entering, and the flame-retardant effect is achieved.

The present invention provides a polynitrile compound, a non-aqueous electrolyte and a lithium ion battery. The structural formula of the polynitrile compound is shown in Structural Formula I or Structural Formula II. Wherein, R1 to R2 are independently selected from halogen, a halogen-substituted C1 to C6 hydrocarbon group, a group containing a halogen-substituted sulfonate group, a group containing a halogen-substituted sulfone group or a group containing a halogen-substituted phosphonate group. The polynitrile compound of the present invention is used as an electrolyte to form a stable interface film at the interface of the material. The film has a good conductive lithium ion channel and does not cause the collapse of the lithium ion channel during the cycle process, thereby improving the cycle and low temperature performance. In addition, the introduction of a side chain functional group structure containing at least halogen can form a thinner inorganic SEI film, occupy the SEI film site, and can alleviate the problem of impedance increase caused by excessive polymerization of nitriles. At the same time, the SEI film is enriched and stabilized and can complex the transition metal in the positive electrode material, so the low temperature and high temperature storage performance can be improved.

The invention provides an electrolyte, a secondary battery and a device. The electrolyte comprises a lithium salt, a non-aqueous solvent, a first additive as shown in a formula 1, a second additive as shown in a formula 2 and a third additive as shown in a formula 3, therefore, the electrolyte disclosed by the invention can be used for solving the problems that the performance of the secondary battery is degraded and fire and explosion are easy to occur due to overcharge in the prior art. Besides, on the basis of ensuring the cycle performance of the secondary battery, the overcharge performance can be effectively improved, and the impedance growth rate can be effectively reduced, so that the secondary battery has excellent comprehensive performance.

This application relates to the field of lithium-ion battery manufacturing technology and discloses a method for preparing a stabilized positive electrode sheet for all-solid-state batteries. The method includes: dispersing positive electrode active material, sulfide solid electrolyte, and binder in a non-polar solvent under an inert atmosphere to obtain a positive electrode slurry; coating and drying to obtain a precursor layer; simultaneously applying pressure and temperature to the precursor layer for interface stabilization heat treatment; and cooling to obtain the positive electrode sheet. This invention utilizes a temperature-pressure coupling process to reduce the yield stress of the electrolyte and promote binder rheology through thermal effects, achieving electrode densification under relatively low mechanical pressure, effectively avoiding the problem of active material particle breakage caused by traditional high-pressure cold pressing processes. This method reduces the positive electrode interface impedance and enhances the interfacial bonding force, thereby significantly improving the structural integrity and cycle life of all-solid-state batteries.

The invention discloses a high-voltage electrolyte additive, an electrolyte and a lithium ion battery, and belongs to the technical field of lithium ion batteries. The structural general formula of the additive is as follows: # imgabs0 # R1, R2 and R3 are respectively and independently selected from one of substituted or unsubstituted phenyl, substituted or unsubstituted C1-C7 straight chain or branched chain structure alkyl, alkoxy, alkenyl and alkynyl; the structural formula of the additive is as follows: # imgabs0 # R1, R2 and R3 are respectively and independently selected from one of substituted or unsubstituted phenyl, substituted or unsubstituted C1-C7 straight chain or branched chain structure alkyl, alkoxy, alkenyl and alkynyl; and R4 is selected from one of substituted or unsubstituted trimethylsilyl, phenyl, alkyl of C1-C7, alkoxy, alkenyl and alkynyl. When being added into the electrolyte, the composite material can be preferentially oxidized and decomposed with the electrolyte in the charging and discharging process of the lithium ion battery, so that an electrode / electrolyte interfacial film is constructed, the stability of the lithium ion battery is improved, the oxygenolysis of the electrolyte is further inhibited, the interface impedance is effectively reduced, and the cycle performance of the lithium ion battery is improved.

The application relates to the technical field of balloon catheters, in particular to a high-strength and durable balloon catheter for deep veins, which comprises a catheter and a connecting pipe, the inner wall of the catheter is movably connected with a communicating pipe, one side of the communicating pipe corresponding to the catheter is provided with an iron filament, the outer wall of the catheter is sequentially provided with a polytetrafluoroethylene layer, a toughness layer and a wear-resistant layer, one end of the catheter is fixedly connected with the connecting pipe, the outer wall of the connecting pipe is provided with a balloon main body, the upper end of the balloon main body is provided with a reinforcing layer and a thermoplastic polyurethane layer, the side close to the balloon main body of the connecting pipe is fixedly connected with a displacement section, the material of the balloon main body can be tightly combined with the thermoplastic polyurethane layer and the reinforcing layer, so that the balloon main body is not easy to fall off, the durability of the device is increased, the user can fold the catheter into a shape required by the human body, the use flexibility of the device is improved, the high-strength and durability of the device are increased, and the service life is prolonged.

The invention discloses a biomass-based porous carbon material as well as a preparation method and application thereof, and belongs to the technical field of preparation of porous carbon materials. The method comprises the following steps: dissolving a phosphorus source and a carbon source in a solvent, and drying to obtain a pyrolysis precursor; and carrying out temperature programming pyrolysis on the precursor in an air atmosphere to obtain the product. According to the method, a phosphorus source and carbon source synergistic carbonization system is constructed, and the dual effects that the phosphorus source forms a compact carbon layer to isolate oxygen at a low-temperature stage and forms a stable POC bond with a carbon skeleton at a high-temperature stage are utilized, so that stable carbonization of the biomass carbon source is successfully realized in an air atmosphere, and the dependence of a traditional process on an inert atmosphere is broken through. The prepared porous carbon material has excellent specific surface area and structural stability, and can be widely applied to the fields of electromagnetic wave absorption, pollutant adsorption, catalytic carriers and the like.

The invention provides a male erection-assisting delayed spray which is characterized by comprising the following components in parts by weight: 40-60 parts of a pepper fruit extract, 35-55 parts of a herba epimedii extract, 25-45 parts of a crocus sativus extract, 40-80 parts of a cynomorium songaricum extract, 30-50 parts of a lilac extract, 25-35 parts of a cistanche deserticola extract, 20-40 parts of a fructus cnidii extract and 25-45 parts of a honeysuckle extract. The spray prepared by the invention is mild in medicine property, safe to use, and good in assistant erection and antibacterial effect, and the extraction efficiency and quality of the spray are greatly improved.

The invention discloses an inert electrolyte and a preparation method and application thereof.The inert electrolyte comprises alkali metal salt and an organic solvent, the organic solvent comprises a first solvent, and the first solvent is a methylated inert solvent; the methylation inert solvent is selected from at least one of a first organic ester compound, an organic ether compound, an organic fluorinated compound and an organic nitrile compound. Through methylation molecular engineering modification on first solvent molecules, inert methyl groups can increase inertness of the solvent molecules and coordination of anions, oxygenolysis of the positive electrode under high voltage and reductive decomposition of the negative electrode are effectively inhibited, stable and uniform interfacial films are formed on the surfaces of the positive electrode and the negative electrode, and the positive electrode and the negative electrode are more stable. And the cycling stability of the battery under high voltage is obviously improved. Meanwhile, the electrolyte has a wide electrochemical window, efficient lithium ion transmission capacity and high wide-temperature adaptability, and the battery can keep stable cycle performance in the low-temperature environment of-20 DEG C and the high-temperature environment of 60 DEG C.