656 results about "Nitrile" patented technology

The invention relates to the technical field of organic synthesis, and discloses a preparation method of bromo-pyrrole nitrile. The method comprises the following steps: (1) mixing p-chlorophenylglycine, acetonitrile, trifluoroacetic acid and a catalyst, then dropwise adding acyl chloride and carrying out acylation reaction, and after the reaction is completed, purging with an inert gas; (2) under the inert gas, mixing the mixture obtained in the step (1) with inorganic salt, then dropwise adding 2-chloroacrylonitrile, carrying out cyclization reaction, and separating a liquid phase from the obtained mixture; and (3) under the inert gas, mixing the liquid phase obtained in the step (2), hydrobromic acid and hydrogen peroxide, carrying out a bromination reaction, then extracting with acetonitrile to obtain an acetonitrile layer, then removing the acetonitrile, and then carrying out cooling crystallization to obtain the bromo-pyrrolenitrile. According to the technical scheme, the reaction yield is high, different solvents do not need to be frequently replaced, and the solvents can be recycled.

The invention discloses a treatment process of high-nitrile-content wastewater, and belongs to the technical field of wastewater treatment. The method comprises the following steps: (1) pretreatment: adding an alkaline substance into the high-nitrile-content wastewater to adjust the pH value of the wastewater to 9-12, and adding sodium percarbonate for reaction to obtain pretreated wastewater; and (2) sequentially treating the pretreated wastewater through an A / A / O process and a biological filter EBF, and discharging after reaching the standard. According to the treatment process, the treatment cost of the high-nitrile-content wastewater can be effectively reduced, the content of nitrile compounds in the wastewater can be rapidly reduced, the biodegradability of the wastewater can be remarkably improved, and the wastewater can be discharged after reaching the standard.

The invention relates to the technical field of sodium batteries, in particular to an electrolyte and a sodium battery containing the same. According to the electrolyte disclosed by the invention, the traditional solvents such as esters, sulfones and nitriles are abandoned, the sodium salt is mixed with one or more of the siloxane organic solvent, the fluorinated solvent or the ether organic solvent with a specific structure to form the electrolyte with a weak solvation structure, and additional additives do not need to be added; the method can be suitable for a sodium battery without a negative electrode (or a sodium metal negative electrode), stable operation is promoted, and the cycle performance is improved; and the electrolyte is simple in preparation process and is beneficial to promoting the industrial development of the sodium battery.

The invention relates to a supergravity adiponitrile production system and method, the system comprises a supergravity nitrile reactor, a separation tower, a semi-nitrile evaporator and a refining device, the middle part of the supergravity nitrile reactor is communicated with the lower part of the separation tower through a main pipeline, and the top of the supergravity nitrile reactor is communicated with a main ammonia gas pipeline; the top of the separation tower is respectively communicated with an ammonia recovery pipeline and a water recovery pipeline, and the upper part of the separation tower is communicated with the refining device through a pipeline; and the top of the semi-nitrile evaporator is respectively communicated with the bottom of the separation tower, the main pipeline and the main ammonia gas pipeline through pipelines. The reactor has the beneficial effects that the characteristics of structure, technology and the like of the supergravity reactor are utilized, the reverse concentration gradient of ammonia gas and molten adipic acid is formed in the radial direction of the rotor from inside to outside, the gas-liquid contact specific area is increased, the mass transfer driving force is increased, the reaction rate is increased, reaction products are separated out in the reaction process, and the reaction is accelerated and pushed.

The invention belongs to the field of shape memory of high polymer materials, and particularly relates to an amino side chain cross-linked shape memory polyarylene ether nitrile composite material as well as a preparation method and application of the amino side chain cross-linked shape memory polyarylene ether nitrile composite material. The preparation method of the composite material comprises the following steps: in an inert gas atmosphere, enabling a monomer containing a bisphenol group, 2, 2-bis (3-amino-4-hydroxyphenyl) propane, a water-carrying agent, an organic solvent, 2, 6-dihalobenzonitrile and a salt-forming agent to form a reaction system, so as to prepare a polyarylene ether nitrile copolymer with an amino side chain; and adding the obtained poly (arylene ether nitrile) copolymer and a monomer containing a terminal carboxyl group into an N, N-dimethylformamide solvent, adding a dehydrating agent, uniformly stirring to obtain a blend, stirring at 40-60 DEG C to enable the amino group and the carboxyl group to be subjected to dehydration, polycondensation and cross-linking, and synthesizing the shape memory poly (arylene ether nitrile) composite material with amino side chain cross-linking. The composite material has good mechanical properties and thermal stability, and also has a toughening function.

The invention discloses an ionic liquid-based electrolyte, a wide-temperature-range high-voltage supercapacitor and application of the wide-temperature-range high-voltage supercapacitor. The wide-temperature-range high-voltage supercapacitor comprises a eutectic ionic liquid system and an organic solvent, the eutectic ionic liquid system comprises at least two ionic liquids; the ionic liquid comprises cations and anions; the positive ions are selected from at least one of pyrrolidinyl positive ions, piperidinyl positive ions, imidazolyl positive ions and quaternary ammonium positive ions containing different side chains; the anion is selected from at least one of tetrafluoroborate, hexafluorophosphate, bis (trifluoromethylsulfonyl imine), bis (fluorosulfonyl imine) and tetracyanoborate; the organic solvent comprises at least one of fluorinated carbonic ester, fluorinated carboxylic ester, sulfones, ethers and nitriles. The supercapacitor based on the ionic liquid-based electrolyte can stably operate in a wide temperature range, so that the wide-temperature-range high-voltage supercapacitor can be suitable for an extreme working environment, and high energy density and power density are achieved.

The invention relates to a sodium ion battery and a nitrile-based electrolyte thereof. The electrolyte comprises: a solvent formed by fluoroethylene carbonate and at least one selected from the group consisting of dinitrile, 3-methoxypropionitrile, isobutyronitrile, valeronitrile, ethylene glycol bis (propionitrile) ether and 4-cyano tetrahydropyran, wherein the volume fraction of fluoroethylene carbonate is 5-20%; and at least one sodium salt selected from the group consisting of sodium hexafluorophosphate, sodium trifluoromethanesulfonate, bis (trifluoromethylsulfonyl) imide sodium and bis (fluorosulfonyl) imide sodium, with a concentration of 2.0-4.0 mol L <-1 >. The electrolyte provided by the invention can simultaneously stabilize an interface between a positive electrode and a negative electrode, and has reasonable ionic conductivity and high electrochemical stability.

The invention provides a fluorine-containing thiophene compound, a preparation method thereof and an electrolyte. The structural formula of the fluorine-containing thiophene compound is as shown in formula I, R1 is fluorine or fluorosulfonyl, R2 is hydrogen, halogen, nitrile group, nitryl, C1-C6 alkyl or C1-C6 halogenated alkyl, and R3 is hydrogen, C1-C6 alkyl or C1-C6 halogenated alkyl. The fluorine-containing thiophene compound is improved on the basis of a conventional thiophene compound, fluorine or fluorosulfonyl is introduced, the defects of the conventional thiophene compound can be overcome, and when the fluorine-containing thiophene compound is used as an additive, the decomposition and oxidation reaction of an electrolyte in a high-pressure and high-temperature system can be reduced, so that the electrochemical performance of a lithium ion battery at high temperature and high pressure is improved.

An elastomeric article is formed from a blend of nitrile rubber and polychloroprene rubber. The elastomeric article can be a glove, such as a medical exam glove. The elastomeric article is softer than a conventional nitrile elastomeric article. The elastomeric article is formed from a blended rubber latex emulsion of nitrile and polychloroprene. The blended rubber latex emulsion may be free of sulfur and vulcanization accelerators.

The invention provides an in-situ polymerization modified polymer solid electrolyte, a preparation method thereof, a diaphragm-free lithium secondary battery and a lithium secondary battery. The polymer solid electrolyte comprises a nitrile polymer as a component (A), a polymer matrix as a component (B) and a lithium salt as a component (C), wherein the component (A) nitrile polymer is derived from an unsaturated nitrile monomer; the unsaturated nitrile monomer comprises an unsaturated aliphatic compound with a cyano group substitution; the unsaturated aliphatic compound contains more than three carbon atoms; the unsaturated nitrile monomer contains at least one unsaturated group, and the component (A) is polymerized in situ in the solid electrolyte. According to the invention, unsaturated nitrile monomers with specific structures are introduced into a high polymer material, and the unsaturated nitrile monomers are polymerized in the high polymer material in situ. Through the nitrile polymer with the specific structure, the ionic conductivity and the mechanical property of the polymer solid electrolyte are improved, and the electrochemical window of the polymer solid electrolyte is widened.

The invention relates to the technical field of high polymer materials, and discloses a synthesis method of low-chlorine polyphenylene sulfide nitrile, which comprises the following steps: carrying out pressurized prepolymerization reaction on a sodium sulfide solution and p-dichlorobenzene to obtain a first prepolymerization reaction product; carrying out copolymerization prepolymerization reaction on the first prepolymerization reaction product and 2, 6-dichlorobenzonitrile to obtain a second prepolymerization reaction product; carrying out heating polymerization reaction on the second prepolymerization reaction product and benzyl chloride to obtain a heating polymerization reaction product; and raising the temperature of the polymerization reaction product, and carrying out phase separation to obtain the low-chlorine polyphenylene sulfide nitrile. Under the condition of no auxiliary agent, the polymerization process of inert gas pressurization and phase separation is adopted, benzyl chloride is applied to adjust the end group, low-chlorine high-molecular-weight polyphenylene sulfide nitrile can be obtained in a short time, the production efficiency of synthesizing polyphenylene sulfide nitrile can be improved, the purification process of byproduct sodium chloride is shortened, auxiliary agent recovery is omitted, and the production cost is reduced. The engineering construction investment is reduced, and the production cost for manufacturing the polyphenylene sulfide nitrile is greatly reduced.

The invention discloses a method for synthesizing an organic nitrile compound by using Pickering emulsion to electrocatalyze aldoxime dehydration, which comprises the following steps: ultrasonically dispersing carbon nanotubes in water, dissolving aldoxime organic matters in cyclohexane, mixing an aqueous solution with a cyclohexane solution, and forming the Pickering emulsion under the action of a homogenizer with the rotating speed of more than 1500rpm; then injecting a certain amount of nitrogen dioxide gas, continuously electrolyzing for 12 hours within the voltage range of-0.3 VRHE to-1.2 VRHE, and homogenizing for 5 seconds by the homogenizer every 5 minutes; the invention relates to the technical field of organic electro-synthesis, in particular to a method for synthesizing an organic nitrile compound by using Pickering emulsion to electrocatalyze aldoxime dehydration, which is a method for directly preparing organic nitrile from reactants aldoxime and nitrogen dioxide in a reactor under electric drive. According to the method, the traditional synthetic technical route of organic nitrile is avoided, the nitrile compound is synthesized in one step, and the method is a novel synthetic method which is brand-new, green, safe and low in harm to a human body and the environment.

The invention belongs to the technical field of gas detection, and particularly relates to a device and a method for detecting decomposition products of insulating gas perfluoroalkyl nitrile. The device comprises a gas collection module, a pretreatment module, a multi-technology combination module, a detection gas chamber and an intelligent data processing and control system, wherein the gas collection module collects and concentrates a gas sample through an equipment gas chamber sampling unit and a low-temperature enrichment unit; the pretreatment module purifies gas and converts complex components through a high-efficiency filter, a dryer and a catalytic conversion unit; the multi-technology combination module is used for separating gas by using a micro gas chromatography unit and carrying out qualitative analysis by using an infrared spectrum unit; a gas sensitive sensor array of the detection gas chamber realizes multi-dimensional detection; a storage module of the intelligent data processing and control system stores various databases, an analysis module calls the databases to analyze multi-module data, and sampling, detection and intelligent analysis of decomposition products are achieved. The problems that existing detection has a leak detection condition and lacks pertinence and high efficiency are solved.

The invention belongs to the technical field of chemical synthesis, and relates to a method for continuously synthesizing 4-bromo-2-p-chlorophenyl-5-trifluoromethyl pyrrole-3-nitrile by a microchannel reactor, which comprises the following steps: pumping a substrate solution to a first plate type micro-reaction module; respectively pumping the bromination reagent solution to a first plate type micro-reaction module, a second plate type micro-reaction module and a third plate type micro-reaction module to obtain a reaction base solution; the reaction base solution is introduced into a fourth plate type micro-reaction module, n-heptane is pumped to the fourth plate type micro-reaction module and a fifth plate type micro-reaction module, deionized water is pumped to the fourth plate type micro-reaction module and the fifth plate type micro-reaction module, and extract liquor is obtained; and carrying out separation, evaporation recovery and recrystallization to obtain a finished product. Through the multi-stage series design of the micro-channel reactor, catalytic bromination replaces traditional bromine oxidation and reaction-extraction in-situ integration, and the three major problems of low efficiency, serious pollution and poor safety of an intermittent process are solved.

The invention relates to the technical field of hydraulic engineering materials, and particularly discloses a corrosion-resistant rubber dam and a preparation method thereof. The rubber dam is prepared by the following steps: forming a composite matrix (in a mass ratio of 60: 25: 15) by using ethylene propylene diene monomer (EPDM), brominated butyl rubber (BIIR) and hydrogenated butadiene-acrylonitrile rubber (HNBR), adding silane coupling agent modified nano zirconium oxide-aluminum oxide composite powder (ZrO2-Al2O3 with the particle size of 30-80nm) as a corrosion-resistant filler, and carrying out two-stage mixing and gradient vulcanization processes. The tensile strength retention rate of the obtained product in a corrosive environment with the pH value of 1-14 is larger than or equal to 92%, the ultraviolet aging resistance life reaches 30 years, the air tightness is improved by 5 times (the leakage rate is smaller than or equal to 2% / month) compared with a traditional EPDM dam, and the dam is suitable for high-corrosive water areas such as seawater backflow and acid rain.

The present application discloses a battery cell and a preparation method therefor, a battery, and an electric device. The battery cell comprises a positive electrode sheet, a negative electrode sheet, and an electrolyte. The electrolyte comprises a first non-aqueous electrolyte solution close to the positive electrode sheet and a second gel electrolyte close to the negative electrode sheet. The first non-aqueous electrolyte solution comprises a first solvent and a first lithium salt, and the first solvent comprises a nitrile-based solvent. The second gel electrolyte comprises a polymer layer and a second non-aqueous electrolyte solution accommodated in the polymer layer. The second non-aqueous electrolyte solution comprises a second solvent and a second lithium salt, and the second solvent comprises a linear monoether solvent. The battery cell has long cycle life and good rate performance.

The sustainable hydraulic hose comprises of an inner-tube, reinforcement which renders robustness to the hose to withstand higher pressures and finally the cover compounds which is the exterior most part of the hose. The present invention relates generally to a sustainable hydraulic hose which is substantially minimizing the use of conventional fossil fuel derived raw materials. Nitrile (NBR) / SBR based innertube is used along with Nitrile (NBR) / SBR based cover compounds and the hydraulic hose accounts for at least 50 % and extendable up to 80 % sustainability. Unlike conventional hoses, which may use petroleum-based synthetic rubbers, sustainable options often incorporate recyclable or biodegradable materials like elastomers, fillers, rubber additives, plasticizers which is derived from bio- origin without depleting the non-renewable resources and at the same time it is ensured that the hoses meet high standards for both performance and environmental impact, providing users with assurance of their eco-friendly credentials.

The invention relates to the technical field of high polymer materials, in particular to a method for improving the heat resistance of melamine phenolic resin by using phthalonitrile, which comprises the following steps: uniformly mixing phthalonitrile resin powder and melamine phenolic resin powder at room temperature, and then curing and molding the uniformly mixed powder at 200-280 DEG C to obtain the heat-resistant melamine phenolic resin. The melamine phenolic aldehyde-nitrile group copolymer resin is obtained. According to the method for obtaining the melamine phenolic-nitrile resin with high thermal stability, high wear resistance and high mechanical property through copolymerization, not only can the thermal stability of the resin be greatly improved, but also the mechanical property can be enhanced, and the processing window of the melamine phenolic resin can be widened.

The invention discloses a preparation method of a loose nanofiltration membrane based on reactive polyarylene ether nitrile oxime, and belongs to the technical field of high polymer materials. Starting from a side chain nitrile group of polyarylene ether nitrile (PEN), the nitrile group is converted into an amidoxime group and a carboxyl group with reactivity, so that the originally relatively inert polyarylene ether nitrile has chemical reaction activity. The nanofiltration membrane which is high in flux, high in interception effect and excellent in acid and alkali resistance is prepared by utilizing an active group on a side chain of the modified reactive poly (arylene ether nitrile) (PEA) through a phase inversion method. The nitrile group conversion provides more cross-linking sites in the nanofiltration membrane preparation process, further improves the cross-linking density, can significantly improve the compatibility with other resins, and provides a brand new thought for the development and utilization of the high-molecular side chain nitrile group and the preparation of the nanofiltration membrane.

The invention relates to the field of batteries, in particular to an electrolyte and an electrochemical device. The electrolyte comprises an organic solvent, an electrolyte and an electrolyte additive, and the electrolyte additive comprises a nitrile additive A and a nitrile additive B; the nitrile additive A comprises at least one of acetonitrile or butanedinitrile; the nitrile additive B comprises at least one of compounds shown as a formula I, # imgabs0, and R1 and R2 are independently and optionally selected from hydrogen, a straight chain or branched chain cyano group with the carbon atom number of 1-10, a straight chain or branched chain alkoxy group with the carbon atom number of 1-10, and a straight chain or branched chain halogenated hydrocarbon with the carbon atom number of 1-5. By combining the nitrile additive A and the nitrile additive B, the high-temperature storage performance and the cycle performance of the battery can be effectively improved at the same time.

The invention discloses a large-steric-hindrance nitrile compound and a preparation method and application thereof.The preparation method comprises the steps that indole carbonate and benzyl isocyanide serve as reaction raw materials, and the nitrile compound with a large-steric-hindrance quaternary carbon center is prepared through a one-pot method in the presence of a metal salt catalyst and a solvent; the invention provides a large-steric-hindrance nitrile compound which has the advantages of higher step economy, atom economy, convenience in post-treatment, rapidness and high efficiency. The high-steric-hindrance nitrile compound is constructed in one step by using simple raw materials, has the advantages of cheap and easily available raw materials, simple and mild conditions, high atom economy, excellent yield and wide substrate range, provides a green synthesis method for efficient construction of a high-steric-hindrance nitrile compound skeleton, and is convenient for preparation of the high-steric-hindrance nitrile compound and application of the high-steric-hindrance nitrile compound in the field of drug preparation.

A non-aqueous electrolyte for a lithium secondary battery, which includes an organic solvent, a lithium salt, a first additive which is a compound represented by Formula 1, a second additive which is lithium tetrafluoroborate, and a third additive including a saturated nitrile-based compound and an unsaturated nitrile-based compound, wherein the lithium salt is different from the second additive, and a lithium secondary battery including the non-aqueous electrolyte are described herein:wherein R1 and R2 are described herein.

The invention discloses a polyarylene ether nitrile nanofiber membrane and a preparation method of the polyarylene ether nitrile nanofiber membrane through double-solvent synergistic electrostatic spinning, and relates to the field of high polymer material preparation. The method comprises the following steps: preparing two electrostatic spinning solutions with obvious volatilization rate and dissolution parameter difference, and alternately depositing two types of fibers on a collecting surface by adopting dual-channel synergistic electrostatic spinning; in the deposition and drying process, chain segments at fiber cross points are induced to swell, mutually diffuse and cure in situ to form bonding points by utilizing the poor evaporation rate of a high / low volatile solvent and the poor solvent-polymer compatibility, so that the self-densification and the structure stabilization of the nanofiber membrane are realized. The obtained nanofiber membrane has high-density in-situ bonding points and remarkably improved mechanical properties, does not need additional post-treatment such as hot pressing or solvent spraying, and is suitable for application such as interlayer reinforcement and interface toughening of composite materials. The process has continuity and controllability, and the density and mechanical properties of the membrane body can be customized by adjusting a solvent system and spinning parameters.

The invention provides a method for rapidly converting acrylonitrile in nitrile-containing wastewater, and relates to the technical field of industrial wastewater treatment. The method comprises the following steps: adding the nitrile-containing wastewater into a reaction kettle, starting stirring, then adding a sulfite aqueous solution, simultaneously continuously dropwise adding a pH buffer aqueous solution, and keeping the pH value of the system at 10.0-10.5 so as to quickly convert acrylonitrile in the nitrile-containing wastewater; wherein the pH buffering agent is a weak acid or a weak acid inorganic salt. According to the method, rapid conversion of sodium sulfite and acrylonitrile is achieved, the situation that acrylonitrile escapes to affect personnel health is avoided, and meanwhile the operation cost is low.

The preparation method comprises the following preparation steps: firstly, crushing dried plumeria rubra petals, soaking the crushed plumeria rubra petals in distilled water, decocting the crushed plumeria rubra petals twice, combining filtrate, and concentrating the filtrate to obtain a plumeria rubra extracting solution; the plumeria rubra extracting solution and a rhodococcus strain are subjected to two-stage seed solution culture, then are mixed with a fermentation culture medium in a specific proportion, and are fermented under proper conditions to generate plumeria rubra fermentation liquor containing 3-cyanopyridine hydratase. Then, the fermentation liquor is subjected to biological catalysis to convert nicotinonitrile into nicotinamide, and through the steps of decoloration, filtration, concentration and the like, the brown yellow plumeria rubra extract containing nicotinamide is finally obtained.

The invention provides a water-based binder for a negative electrode of a lithium ion battery as well as a preparation method and application of the water-based binder, and belongs to the technical field of binders and lithium ion battery auxiliary materials. The water-based adhesive is prepared from the following components in parts by mass: 0.1 to 10 parts of a water-based polymeric dispersant, 10 to 20 parts of a hydrophilic unsaturated carboxylic acid monomer I, 60 to 70 parts of a hydrophobic unsaturated nitrile monomer I, 5 to 35 parts of an acrylate monomer, 40 to 55 parts of a hydrophilic unsaturated carboxylic acid monomer II, 5 to 20 parts of an unsaturated amide monomer, 20 to 40 parts of a hydrophobic unsaturated nitrile monomer II, 0.1 to 1 part of an oil-soluble initiator and 180 to 300 parts of water. The water-based adhesive provided by the invention has relatively low swelling degree and relatively high peel strength. The negative plate prepared from the aqueous binder has good flexibility, and can reduce the internal resistance of the lithium ion battery.

The invention relates to the field of polymer functional membrane materials, and particularly provides a composite sulfonated polyarylene ether nitrile sulfone proton exchange membrane and a preparation method thereof. Sulfonated poly (arylene ether nitrile sulfone) is synthesized through nucleophilic substitution reaction, and the sulfonated poly (arylene ether nitrile sulfone) and sulfonated cobalt phthalocyanine are subjected to blending and casting to form a membrane, so that the provided composite sulfonated poly (arylene ether nitrile sulfone) proton exchange resin contains a sulfonic acid structural unit, a sulfone structural unit, a polar cyano group and a phthalocyanine structural unit; the problem that an existing proton exchange membrane is low in sulfonation degree and proton conductivity can be solved, and the proton exchange membrane has the advantages of being high in structural stability, good in mechanical property, excellent in thermal stability and high in safety. The introduction of sulfonated cobalt phthalocyanine can effectively improve the internal structure of the sulfonated polyarylene ether nitrile sulfone proton exchange membrane, promote the conduction rate of water molecules in the membrane, and further improve the proton conductivity of the sulfonated polyarylene ether nitrile sulfone proton exchange membrane. In addition, the manufacturing process is green and simple, the compounding cost is low, and the application prospect is very wide.

The present disclosure provides a non-aqueous electrolyte solution for a lithium secondary battery, which may form a robust solid electrolyte interphase (SEI), and a lithium secondary battery in which battery performance is improved by including the same. Specifically, the non-aqueous electrolyte solution for a secondary battery includes a lithium salt, a non-aqueous organic solvent, a first additive, and a second additive, wherein the non-aqueous electrolyte solution for a secondary battery may include an oligomer including a repeating unit derived from a monomer represented by Formula 1 and a repeating unit derived from a monomer represented by Formula 2 as the first additive, and may include at least one selected from the group consisting of a nitrile-based compound, a lithium salt compound, and a cyclic carbonate compound as the second additive.

The invention discloses a fast-charging electrolyte with wide temperature range and high voltage and application thereof.The electrolyte comprises a cosolvent, a solute and a film-forming additive, the cosolvent comprises a fluoro-carboxylic ester compound and a nitrile compound, the fluoro-carboxylic ester compound and the nitrile compound both have wide liquid range and strong oxidation resistance, and the solute and the film-forming additive form a film. And a foundation is laid for wide-temperature and high-voltage application of the electrolyte. The fluorocarboxylate compound enables the electrolyte to have obvious weak solvation characteristics, and promotes rapid desolvation of lithium ions at low temperature and high rate; the nitrile compound has a high dielectric constant, so that the conductivity of the electrolyte is improved. And the two can exert respective advantages and show a synergistic effect, so that the multiplying power and the cycle performance of the lithium ion battery under wide temperature range and high voltage are greatly improved.

The invention discloses a vanadium-chromium composite oxide material. The composition of the composite oxide is VCrxMyOz, wherein M is one of Ti, Mo, W, B, Fe, Co, Ni, Cu, Zn, Sb, Bi, alkali metal or alkaline earth metal; x is equal to 0.1-3 and is the atom molar ratio of chromium to vanadium; y is equal to 0-1.5 and is the atom molar ratio of M to vanadium; z is determined according to the valence state of atoms; the composite oxide material is a porous hollow microsphere formed by assembling blocky or flaky nanoparticles, and the diameter of the composite oxide material is 1-100 [mu] m. The invention also discloses a preparation method and application of the material. Vanadium and chromium compounds and compounds of other elements are used as raw materials, amino acid compounds are used as auxiliary reagents, the prepared vanadium and chromium composite oxide can be self-assembled to form a porous hollow micron spherical structure, and the microsphere material is uniform in particle size distribution and large in specific surface area; the vanadium-chromium composite oxide with the structure can be used for preparing aromatic nitrile through ammoxidation reaction of methyl aromatic hydrocarbon, the ammoxidation reaction temperature is low, the reaction activity and the product yield are high, and the selectivity is good.