252results about How to "Less side effects" patented technology

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

The invention discloses a method for directly repairing and regenerating a ternary positive electrode recycled material. The method comprises the following steps: S1, disassembling a ternary retired battery; s2, sintering to remove impurities; s3, removing powder and sieving; s4, mixing with crystalline lithium salt; s5, crushing and sieving after sintering and cooling; s6, mixing with a metal oxide; and S7, sintering, cooling, removing iron, and sieving. The eutectic lithium salt is used as a lithium source for lithium supplement, so that the diffusion rate of lithium ions can be increased, the concentration of the lithium ions can be improved, the reaction temperature of lithium supplement recovery can be reduced, and the energy consumption can be reduced. The ternary lithium battery is wrapped by the metal oxide, residual lithium on the surface of the material can be utilized, a layer of fast ion conductor can be formed on the surface of the material in situ, and the residual lithium on the washed surface is removed, so that the process is shortened, the cost is reduced, the transmission rate of lithium ions can be further improved, and the rate capability of the battery is improved. And the fast ion conductor structure can isolate the contact between the electrolyte and the positive electrode material, so that side reaction is reduced, and the cycle performance is improved.

The invention discloses a high-nickel lithium-rich manganese-based all-solid-state battery positive electrode material which comprises a nickel cobalt lithium manganate inner core and a NiO layer coated on the surface of the inner core, in the high-nickel lithium-rich manganese-based all-solid-state battery positive electrode material, the weight percentage of NiO is 1-5%. The positive electrode material is nickel cobalt lithium manganate with the surface coated with the NiO layer, the NiO coating layer with high chemical stability on the surface of the positive electrode material can serve as a protective layer at a positive electrode / electrolyte interface, on one hand, lattice oxygen on the surface of the positive electrode material can be stabilized, and phase degradation of the positive electrode material in the circulation process is reduced; on the other hand, the material can be used as a buffer layer to limit direct contact between the positive electrode material and the solid electrolyte, thereby weakening side reaction between the positive electrode material and the solid electrolyte and finally improving specific capacity and cycle performance of the solid-state battery. The invention also discloses a preparation method of the high-nickel lithium-rich manganese-based all-solid-state battery positive electrode material, the all-solid-state battery positive electrode material and an all-solid-state battery.

The invention discloses a positive electrode lithium supplementing agent, a positive electrode plate, a secondary battery and a power utilization device, and belongs to the technical field of batteries, the positive electrode lithium supplementing agent comprises lithium phytate and a lithium supplementing agent, and the lithium supplementing agent comprises at least one of Li5FeO4, Li6CoO4 and Li2NiO2. The lithium phytate and the lithium supplementing agent are combined to serve as the positive electrode lithium supplementing agent, the lithium phytate and the lithium supplementing agent act together, active oxygen and metal ions released by the lithium supplementing agent are adsorbed, side reactions of the electrolyte are reduced, the electrochemical stability of a system is maintained under high voltage, meanwhile, lithium can be completely released under a high-voltage lithium cobalt oxide system, and the service life of the lithium battery is prolonged. The release amount of a lithium source is effectively increased, the lithium consumption of a negative electrode SEI film forming reaction is fully supplemented, the embedding and separating process of lithium ions in a positive electrode material is promoted, the gas expansion of the secondary battery is improved, and the cycle life of the secondary battery is effectively prolonged.

The invention relates to the technical field of batteries, in particular to a composite positive electrode material and a preparation method and application thereof. The composite positive electrode material comprises a base material and a perovskite phase coating layer coating the surface of the base material, the chemical formula of the base material comprises LiNi < x > Co < y > Mn < 1-x-y-z > M < z > O < 2 >, 1, 0 < = y < lt >; 0 < = zlt; 0.2, x + y + zlt; 1, the chemical formula of the perovskite phase coating layer comprises AQO3, A is at least one of Ca, Sr and Ba, and Q is Ti or Zr. According to the composite positive electrode material, the uniform perovskite phase coating layer is arranged on the surface of the base material, so that the surface residual alkali can be remarkably reduced, the side reaction on the surface of the material is slowed down, and the thermal stability and the cycle performance of the composite positive electrode material are improved.

The invention relates to the technical field of electrolysis, in particular to trifluoromethyl sulfonamide electrolytic fluorination equipment which comprises a preparation box, and the inner wall of the preparation box is fixedly connected with an electrolytic bath; and the self-adaptive electrolysis adjusting mechanism comprises an anode and a cathode which are used for electrolytic treatment. The temperature of the surface of the electrode is monitored in real time through the infrared thermometer, then the concentration of trifluoromethyl sulfonamide is fed back, electrolysis conditions are automatically adjusted according to temperature changes, the electrolytic reaction is prevented from being too violent, side reactions are reduced, the infrared thermometer transmits monitored temperature data to the PLC, and the PLC controls the temperature of the electrode. The PLC automatically adjusts a second electric telescopic rod according to temperature feedback, so that the second telescopic rod pushes a conducting strip to slide on a resistance plate, current and voltage between electrodes are changed, then a first motor is controlled, a bidirectional screw is driven to rotate to be matched with a limiting rod, and the distance between the anode and the cathode is dynamically adjusted.

The invention provides a positive electrode material, a positive electrode plate and a secondary battery. The positive electrode material contains an element M, the element M is selected from at least one metal element in IA group and IIA group in the periodic table of elements, the distribution of the element M in particles meets the condition that X2 / X1 is greater than or equal to 1.2 and less than or equal to 20, X1 is the concentration of the element M in the central region of the particles, X2 is the concentration of the element M in the surface region of the particles, and X3 is the concentration of the element M in the surface region of the particles. The surface of the positive electrode material contains nitrate ions, the content of the nitrate ions is N1, and N1 is more than or equal to 10ppm and less than or equal to 100ppm. The positive electrode material disclosed by the invention has relatively high structural stability and relatively small number of microcracks, a stable interface protection layer can be formed on the surface of the positive electrode material, and side reaction between an electrolyte and the surface of the positive electrode material is reduced, so that the capacity and the cycle performance of a battery prepared from the positive electrode material are comprehensively improved, and meanwhile, the gas production performance is improved.

The invention provides a secondary battery. The secondary battery comprises a negative pole piece and an electrolyte, the negative pole piece comprises a silicon-based negative pole material; the electrolyte comprises a first additive and a second additive; the first additive comprises fluoroethylene carbonate; and the second additive comprises a compound as shown in formula I: # imgabs0 #. The secondary battery disclosed by the invention adopts a silicon-based negative electrode material and has a compact and stable interfacial film, so that the side reaction of the battery is reduced, and the normal-temperature cycle performance, the high-temperature cycle performance, the high-temperature storage performance and the low-temperature discharge performance of the battery are improved.

The invention discloses a battery negative electrode material and a preparation method thereof, and relates to the technical field of batteries. The battery negative electrode material comprises an inner core, a titanium dioxide coating layer coated on the surface of the inner core, a lithium titanate coating layer coated on the surface of the titanium dioxide coating layer, a carbon coating layer coated on the surface of the lithium titanate coating layer and a polymer coating layer coated on the surface of the carbon coating layer, the inner core comprises a silicon-based negative electrode material; the polymer coating layer comprises at least one of polyaniline, polythiophene and polypyrrole. Under the action of the four coating layers, the integrity of the silicon-based negative electrode material can be kept, direct contact between the silicon-based negative electrode material and an electrolyte is avoided, side reactions are reduced, the capacity fading of the battery in the charge-discharge cycle process is reduced, and the rate capability and the cycle stability of the battery are improved.

The invention discloses a catechol side group-containing polylysine derivative as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) dissolving catechol acid in an organic phase, firstly adding NHS, stirring and dissolving until the materials are uniformly mixed, then adding EDC.HCl, and stirring and reacting to obtain a catechol-NHS intermediate solution; (2) dissolving polylysine or a salt thereof in a water phase, and adjusting the pH value to 6.0-7.0 by using an alkaline solution to obtain a solution of polylysine or a salt thereof; and (3) adding the intermediate solution obtained in the step (1) into the polylysine or the salt solution thereof obtained in the step (2), and maintaining the pH value of the reaction system at 5.0-6.0 by using an alkaline solution to obtain the catechol side group-containing polylysine derivative. The preparation method is short in reaction time and mild in reaction condition, and the obtained product is high in grafting rate and high in raw material conversion rate and has a good application prospect in the aspects of tissue adhesives and the like.

The invention relates to the technical field of batteries, in particular to a surface modification method of a positive electrode. The surface modification method of the positive electrode provided by the invention comprises the following steps that an aluminum source, a carbon nano tube and the positive electrode are mixed and calcined, the surface-modified positive electrode is obtained, the addition amount of the aluminum source is 300 ppm to 900 ppm, and the addition amount of the carbon nano tube is 300 ppm to 900 ppm according to the mass of the positive electrode. The surface of the positive electrode material is modified by coating the positive electrode material with the carbon nanotubes and the aluminum source, on one hand, contact between the positive electrode material and an electrolyte can be isolated to a great extent, and the cycle performance of the material is improved, and on the other hand, the mixture formed by the carbon nanotubes and the aluminum source has good rapid ion and electron transmission performance, and has good electrochemical performance. The migration rate of lithium ions can be improved, the direct-current resistance of the positive electrode material can be reduced, and meanwhile, the increase of the direct-current resistance in the circulation process is inhibited.

The invention relates to the technical field of compound preparation, in particular to a preparation method of nitrobenzimidazole and aminobenzimidazole compounds, which comprises the following steps of: adding an inorganic base catalyst into an organic solvent by taking 4-nitro-o-phenylenediamine and a nitrobenzoyl chloride compound as raw materials; the preparation method comprises the following steps: reacting at a temperature lower than room temperature to obtain a condensation reaction solution, continuously raising the temperature of the condensation reaction solution to carry out cyclization reaction, and after the reaction is finished, carrying out post-treatment to obtain the 2-nitrobenzimidazole compound. Taking the 2-nitrobenzimidazole compound as a raw material, adding a reduction catalyst, carrying out hydrogenation reduction reaction in a solvent, and after the reaction is finished, carrying out post-treatment to obtain the 2-aminobenzimidazole compound. According to the preparation method, the inorganic base catalyst is used for replacing a conventional acid catalyst to realize one-pot synthesis, and the preparation method is high in selectivity, high in product quality and yield, mild in reaction condition, simple and convenient to operate, environment-friendly and suitable for batch production.

The invention discloses a biomass hard carbon surface optimization method and application of the biomass hard carbon surface optimization method in a sodium-ion battery, and belongs to the technical field of sodium-ion batteries. The biomass hard carbon surface optimization method comprises the following steps: pre-oxidizing a biomass raw material, and carrying out high-temperature carbonization in an inert atmosphere to obtain primary carbonized powder; dispersing the preliminarily carbonized powder and dopamine hydrochloride in a buffer solution, and reacting to obtain hard carbon powder coated with polydopamine; and carrying out high-temperature carbonization on the hard carbon powder coated with the polydopamine in an inert atmosphere to obtain the biomass hard carbon. The biomass hard carbon prepared by the invention has high first coulombic efficiency, high reversible specific capacity, excellent rate capability and good cycle stability, and can overcome the problems of low first coulombic efficiency and poor rate capability of the existing hard carbon negative electrode.

The invention discloses silver particles and a preparation method and application thereof, and the preparation method comprises the following steps: S1, dispersing a silver source in an alcohol amine solution, and adding a dispersing agent to form a base solution; the molar ratio of silver ions in the silver source to an alcohol amine compound in the alcohol amine solution is 1: (0.05-5); s2, the base solution and an organic amine solution are subjected to a hydrothermal reaction, and the silver particles are prepared; the molar ratio of silver ions in the silver source to the organic amine compound in the organic amine solution is 1: (0.005-0.15). The proportion of the large-particle-size silver particles and the small-particle-size silver particles is regulated and controlled by controlling the dosage of the alcohol amine solution and the organic amine solution, so that gaps of the large-particle-size silver particles are filled with the small-particle-size silver particles, and the tap density of the silver powder is improved.

The invention provides a ternary high-nickel positive electrode material and a preparation method thereof, a lithium ion battery and electric equipment, and relates to the field of lithium ion batteries. The preparation method of the ternary high-nickel positive electrode material comprises the following steps: mixing a positive electrode material precursor, a lithium source and a zirconium-containing additive, and carrying out primary sintering to obtain a primary sintered product; mixing the product obtained after primary sintering with a titanium-containing additive, and carrying out secondary sintering to obtain a product obtained after secondary sintering; mixing a product obtained after secondary sintering with water and aluminum nitrate, and carrying out wet washing coating, filtering and drying to obtain a coated material; and mixing the coated material with an additive containing doping elements, and sintering for three times to obtain the ternary high-nickel positive electrode material. A uniform needle-shaped coating layer can be formed on the surface of a product after secondary sintering, direct contact between an electrolyte and the material can be prevented, side reactions are reduced, migration of lithium ions to the surface can be avoided, the structural stability of the material is kept, and the capacity exertion is facilitated.

The invention relates to a diaphragm, a preparation method thereof, a secondary battery and a device. The diaphragm provided by the invention comprises a diaphragm body; the solid electrolyte layer is arranged on the diaphragm body, the solid electrolyte layer comprises a modified metal oxide, the modified metal oxide comprises a metal oxide and a silane compound connected to the surface of the metal oxide, and the silane compound is connected to the surface of the metal oxide. The metal oxide comprises at least one of lithium aluminum titanium phosphate, lithium lanthanum zirconium oxide, lithium lanthanum zirconium tantalum oxide, lithium lanthanum zirconium aluminum oxide, lithium lanthanum titanium oxide, lithium aluminum germanium phosphate and lithium lanthanum aluminum titanate. According to the invention, the hydrophobic modified metal oxide is coated on the diaphragm body and the solid electrolyte layer is formed, so that the moisture value of the solid electrolyte coated diaphragm is remarkably reduced, the negative influence of the moisture of the diaphragm on the battery performance is relieved, and the coulombic efficiency and the cycle performance of the secondary battery using the diaphragm are improved.

The invention discloses a preparation method and application of a composite 3D negative electrode current collector for a lithium metal battery, and belongs to the field of batteries, and the preparation method comprises the following steps: firstly, introducing a reduced graphene oxide artificial interface layer on the surface of the current collector through a chemical coating means, so that the reduced graphene oxide artificial interface layer and the current collector are tightly combined and are not easy to fall off after being bent due to chemical reaction in the process; and the conductivity and the ductility of the coated current collector are not greatly damaged. Then, on this basis, a three-dimensional micro-pit array structure with a lithium-loving oxide layer is introduced on the surface of the current collector by means of laser etching, so that the specific surface area of the current collector is increased, the surface current density distribution is adjusted, lithium metal is effectively induced to be uniformly deposited on the macro-scale and the micro-scale, and formation of lithium dendrites is inhibited; the lithium copper half battery assembled by the current collector has excellent cycle performance. The preparation process flow is simple, the composite 3D current collector with excellent performance is prepared, the cost is effectively reduced, and the production efficiency is improved.

The invention relates to the technical field of batteries, in particular to a positive plate and a battery comprising the positive plate. The positive plate comprises a positive current collector and a positive active material layer, the positive active material layer comprises a ternary material and a conductive binder, the conductive binder comprises a carbon nanotube and a bonding layer, the bonding layer comprises a bonding group and a complexing group, the bonding group comprises one or more of carboxyl, hydroxyl, amido and silyl, the complexing group comprises cyano, and the bonding group comprises one or more of carboxyl, hydroxyl, amido and silyl. The weight ratio of the bonding groups to the complexing groups is (5-8): 1, and the length-diameter ratio of the carbon nanotubes is 50-10000; the ternary material comprises first particles and second particles, the weight content of the element W in the first particles is 500 ppm to 3500 ppm, and the weight content of the element Y in the second particles is 200 ppm to 2000 ppm. The ternary material disclosed by the invention is relatively high in cycling stability, the bonding cohesion in the positive electrode active material layer is relatively high, and the cycling stability and the rate capability of the battery are relatively high.

The invention relates to a uniform carbon-coated mesoporous silicon carbon negative electrode material and a preparation method and application thereof.The preparation method comprises the steps that a product obtained after pyrolysis and carbonization of a biomass carbon source is subjected to alkali activation treatment, acid pickling, drying, smashing, passivation, water washing and drying are conducted to obtain a mesoporous carbon matrix, nanometer silicon particles are deposited in pores of the mesoporous carbon matrix, and the uniform carbon-coated mesoporous silicon carbon negative electrode material is obtained. Then selecting a low-temperature carbonization material and polyethylene glycol to perform pre-carbonization and complete carbonization treatment on the mesoporous silicon carbon material to obtain a carbon coating layer, and finally obtaining the uniform carbon-coated mesoporous silicon carbon negative electrode material. When the uniform carbon-coated mesoporous silicon carbon negative electrode material is applied to a lithium battery, the mesoporous skeleton can effectively inhibit volume expansion of silicon in a battery circulation process, and the uniform carbon-coated layer can effectively reduce the risk of direct contact between the negative electrode material and an electrolyte, so that a stable SE I film is formed to reduce the occurrence of side reactions; and the first coulombic efficiency and the cycle performance of the battery are further improved.

This invention discloses an aqueous micelle-assisted electrochemical Pd-catalyzed coupling method for aryl halides and olefins, belonging to the field of electrocatalytic organic synthesis technology. The method includes: S1 preparing an alkaline electrolyte, adding a surfactant, and stirring to form a micelle structure in the aqueous system to obtain a catholy; using the alkaline solution as the anolyte; S2 adding an aryl halide substrate, an olefin substrate, and a palladium catalyst to the catholy, and mixing them evenly to obtain a reaction solution; S3 transferring the reaction solution and the anolyte to the cathode chamber and anode chamber of an electrochemical reaction apparatus, respectively, placing a working electrode and a reference electrode in the cathode chamber, and a counter electrode in the anode chamber to form a three-electrode system, and carrying out an electrochemical reaction under an applied potential, causing the aryl halide to undergo a coupling reaction with the olefin to generate a substituted olefin product. This invention offers high selectivity, high yield of the target substituted olefin product, mild reaction conditions, and is environmentally friendly.

The application provides a positive plate preparation method based on electrolyte moisture control and a battery. The core rule that "moisture of solid-state electrolyte wet powder is a key factor affecting the moisture of the positive plate" is first determined, and the long-standing error cognition in the industry that "controlling the total moisture of the slurry is enough" is corrected, providing a scientific theoretical basis for moisture control. By detecting three indexes before the slurry is used, the moisture of the positive plate can be accurately predicted whether it will exceed the standard, and the risk of scrapping the whole batch of positive plates is fundamentally avoided. By strictly controlling the moisture of the positive plate, the side reactions in the battery are effectively reduced, the capacity retention rate, rate performance and cycle life of the battery are improved, and the safety hazards such as swelling and thermal runaway caused by excessive moisture are reduced.

The invention discloses a method for preparing nitro-mesitylene through a micro-channel nitration reaction. The method comprises the following steps: respectively conveying mesitylene, fuming nitric acid and sulfuric acid to a micro-channel reaction module through a metering pump, and completing nitration reaction within a retention time of tens of seconds to several minutes. The introduction sequence of nitration reaction materials, the reaction retention time and the reaction temperature are cooperatively controlled, the nitration reaction is completed in the microchannel reactor in a continuous flow mode, operation is easy and convenient, safety is high, efficient continuous production can be achieved, meanwhile, emission of three wastes is reduced, and the industrial application advantages of being environmentally friendly and economical are achieved.

This invention belongs to the technical field of lithium battery anode materials, specifically relating to a highly conductive graphite electrode material and its preparation method. The preparation method includes: pre-dissolving sodium carboxymethyl cellulose into a gel solution, then ball-milling and mixing graphite and conductive carbon black, dispersing them together with a cobalt hexacyanorubium(II)-dodecyltungstencobalt(III) salt hybrid material and hafnium diboride nanomaterials in the gel solution, adjusting the acidity, adding styrene-butadiene rubber emulsion to obtain a uniform slurry, and then coating, drying, and compacting to obtain the anode sheet. This invention significantly improves the conductivity and structural stability of the graphite anode through the synergistic effect of the interface modification of the cobalt hexacyanorubium(II)-dodecyltungstencobalt(III) salt hybrid material and the conductive framework of the hafnium diboride nanomaterials. The process is safe and controllable, and suitable for industrial production of lithium-ion batteries.

The utility model relates to a chloroacetic acid production device for processing glycine, which is characterized in that an interlayer is arranged in the outer wall of a chlorination kettle, the side end is connected with a liquid level meter a, and a discharge pipe is arranged on the lower surface; a radar liquid level instrument, a chlorine feeding pipe, an on-line component analyzer, an on-line thermometer, an on-line hydrometer, a condensation pipe, a catalyst filling pipe and an acetic acid feeding pipe are sequentially arranged on the upper surface, the lower end of the chlorine feeding pipe is connected with a gas distributor, and the condensation pipe is externally connected with a condenser; the catalyst filling pipe is externally connected with a catalyst metering tank; a liquid level meter b is connected to the side end of the kettle body, a discharging pipe is arranged on the lower surface of the kettle body, a water supplementing pipeline is connected to the right side of the upper surface of the kettle body, a liquid inlet pipe and an online moisture measuring device are arranged on the left side of the upper surface of the kettle body, and the liquid inlet pipe is communicated with the discharging pipe; the upper end of the stirrer is connected with a stirring motor, and the lower end is connected with a frame-type stirring paddle; the utility model has the advantages of reasonable structural design and good use effect.

The invention discloses a process for preparing a V2O3 / ZnV2O3 total battery by simultaneously using vanadium oxide in a zinc ion battery as a positive electrode material and a negative electrode material, which comprises the following steps: reacting ammonium metavanadate with absolute ethyl alcohol by adopting a solvothermal synthesis method, washing, drying, and calcining in a tubular furnace to obtain V2O3; in the preparation process of the V2O3 positive electrode material, only V2O3, acetylene black serving as a conductive agent and PVDF serving as a binder are mixed in proportion and then are coated on graphite paper, other coating protection materials do not need to be introduced into a V2O3 / Zn negative electrode, and V2O3 is used as a protection layer to inhibit growth of zinc dendrites, relieve hydrogen evolution side reaction of the zinc negative electrode and reduce corrosion of zinc. Vanadium oxide V2O3 is directly used as a core positive electrode material, the zinc negative electrode coating is developed by utilizing the characteristics of the vanadium oxide V2O3, a material is formed, meanwhile, the performance optimization of the positive electrode and the negative electrode is realized, the used raw materials are simple and easy to obtain, the process is simple and easy to implement, and the preparation process is simple and easy to implement from V2O3 raw material synthesis to positive and negative electrode piece preparation to V2O3 / ZnV2O3 total battery assembly. And comprehensive improvement of positive and negative electrode performances of zinc ions is simultaneously realized by a single material.

The invention relates to the technical field of lithium ion batteries, in particular to a composite positive electrode material and a preparation method thereof, a lithium ion battery and electric equipment. The invention provides a preparation method of a composite positive electrode material, which comprises the following steps: mixing a bulk phase dopant, a lithium source and a ternary precursor to obtain a mixture I, and respectively sintering at 815-830 DEG C for 12-14 hours and at 760-770 DEG C for 8-10 hours to obtain a sintered material I-1 and a sintered material I-2; a first coating agent and a second coating agent are mixed with the sintered material I-1 and the sintered material I-2 respectively and then coated, and a sintered material II-1 and a sintered material II-2 are obtained; and mixing the sintered material II-1 and the sintered material II-2 to obtain the composite positive electrode material. According to the invention, the bulk phase dopant and the doped ternary precursor core layer are firstly added, then the first coating agent and the second coating agent are added, and the surface functional layer is synthesized, so that the composite positive electrode material has both high capacity and high cycle stability under the synergistic effect of the bulk phase dopant and the doped ternary precursor core layer.

This invention discloses a method for preparing the DPP1 inhibitor bresocarte, belonging to the field of pharmaceutical synthesis. Specifically, the method includes the following steps: N-tert-butoxycarbonyl-L-4-bromophenylalanine reacts with methanesulfonyl chloride or 4-nitrobenzenesulfonyl chloride in the presence of a base, followed by amination substitution to obtain intermediate 1; then, it undergoes dehydration in the presence of trifluoroacetic anhydride to obtain intermediate 2; next, it undergoes a coupling reaction with pinacol diboronate to obtain intermediate 3; then, it undergoes a coupling reaction with bromide compound 4 to obtain intermediate 5; then, it undergoes cyclization with di-tert-butyl dicarbonate in the presence of sodium methoxide to obtain intermediate 6; then, it undergoes deprotection in the presence of hydrogen chloride to obtain intermediate 7; next, it undergoes condensation with compound 8 to obtain intermediate 9; finally, it undergoes deprotection in the presence of hydrogen chloride to obtain the inhibitor bresocarte. This method provides a new synthetic approach, with low overall cost, simple operation, high yield, and suitability for industrial production.

The application discloses a reaction mixture for preparing 2,6-naphthalene dicarboxylic acid and a 2,6-naphthalene dicarboxylic acid crude product, a product and a preparation method thereof. By adding a small amount of a reaction aid into raw materials of a 2,6-diisopropyl naphthalene oxidation reaction, the 2,6-diisopropyl naphthalene oxidation reaction can be effectively promoted, a side reaction can be reduced, the purity of 2,6-naphthalene dicarboxylic acid in the 2,6-naphthalene dicarboxylic acid crude product can be effectively improved, and the contents of key impurities 2-methyl-6-naphthalene carboxylic acid and 2-acetyl-6-naphthalene carboxylic acid can be effectively reduced.

The invention relates to the field of lithium ion batteries, and discloses a gel electrolyte, an in-situ curing electrolyte and a lithium ion battery. The gel electrolyte comprises a solvent, a polymer and a metal salt, wherein the polymer is a heterochain polymer with a main chain or a side chain containing a sulfur-containing siloxane group and a nitrogen-containing group. A main chain or a side chain of a polymer in the gel electrolyte contains a sulfur-containing siloxane group and a nitrogen-containing group, so that volatilization and leakage of a solvent can be inhibited, excellent liquid retention performance is brought, the thermal safety of a battery is improved, an interface side reaction can be inhibited, and the high-temperature and high-pressure stability of the battery is improved.

The application provides a preparation method of high-quality magnesium oxide and belongs to the technical field of magnesium metal oxide synthesis. The application uses magnesium hydroxide waste produced in an ethyl maltol process as raw material, and obtains magnesium oxide through sodium hypochlorite oxidation, twice water washing and calcination. The obtained magnesium oxide has high purity and high activity. The process flow of the application is short, the calcination temperature is low, the side reaction is less, the subsequent equipment investment is less, the price of sodium hypochlorite is relatively low, the cost is saved, new impurities are not introduced, and the application has good industrial application value.