81 results about "Propane sultone" patented technology

The invention provides a lithium ion battery and an electric device, the lithium ion battery comprises a positive electrode, a negative electrode, a diaphragm and an electrolyte, the positive electrode comprises a positive electrode active material layer, the positive electrode active material layer comprises a positive electrode active material and an oxide solid electrolyte, and the surface of the diaphragm is provided with an oxide solid electrolyte layer; the electrolyte comprises a solvent, a lithium salt, a first additive and a second additive, the first additive comprises fluoroethylene carbonate, and the second additive comprises 1, 3-propane sultone; the lithium ion battery satisfies the following conditions: 0.72 < = (H + X) / P < = 8; 0.5 < = (A + B) / (H + X) < = 8.89; 0.16 < = H / X < = 6.4; 0.5 < = A / B < = 12. According to the lithium ion battery provided by the invention, the safety and the high and low temperature performance of the positive electrode of the lithium ion battery are remarkably improved through multi-component cooperative regulation and control, further, when the lithium ion battery meets the limitation of the relational expression at the same time, the interface impedance can be reduced to the maximum extent, and the performance of the lithium ion battery can be improved through cooperation of multi-component parameters. And synchronous optimization of thermal safety, low-temperature discharge capacity and high-temperature cycle life of the battery is realized.

The invention belongs to the technical field of membrane separation, and particularly relates to a low-pressure high-flux polyamide / polysulfone hollow fiber composite nanofiltration membrane and a preparation method thereof. The preparation method of the composite nanofiltration membrane comprises the following steps: dissolving sulfonated polysulfone, poly (1-vinyl-3-butylimidazole) bromide and polyvinylpyrrolidone to prepare a spinning solution, and spinning to obtain a base membrane; carrying out hydrophilic modification on the base membrane by using 1, 3-propane sultone; then, an aqueous phase solution containing poly (gamma-glutamic acid) and triethylene tetramine and an organic phase solution containing trimesoyl chloride and 3, 5-diaminobenzoic acid are subjected to interfacial polymerization in the inner cavity of the modified base membrane to form a polyamide separation layer; and finally, carrying out heat treatment to obtain the composite nanofiltration membrane. Through the synergistic effect of zwitterionic ionization of the base membrane and biomacromolecule construction of the separation layer, the mass transfer resistance of water is remarkably reduced, unification of high flux and high selectivity is achieved, and good structural stability is achieved.

The invention discloses a wide-voltage wide-temperature-range sodium-ion battery electrolyte and a preparation method and application thereof, and belongs to the technical field of sodium-ion battery electrolytes.The wide-voltage wide-temperature-range sodium-ion battery electrolyte comprises sodium salt, an organic solvent and an additive, the organic solvent is selected from one or more of ethylene carbonate, propylene carbonate, ethyl methyl carbonate, dimethyl carbonate, diethyl carbonate, ethylene glycol dimethyl ether, diethylene glycol dimethyl ether and triethylene glycol dimethyl ether, and the additive is selected from one or more of fluoroethylene carbonate, allyl-1, 3-propane sultone, 1, 3-propylene sultone, 1, 3-propylene sultone and 1, 3-propylene sultone. The additive is one or more of 1, 3-propyl sultone, methylene methane disulfonate, ethylene sulfate, trifluoromethanesulfonic anhydride, pentaerythritol bicyclic sulfate, tri (trimethylsilane) phosphate, tri (trimethylsilane) phosphite, tri (trimethylsilane) borate, acesulfame sodium and aluminum trifluoromethanesulfonate, and the additive is one or more of 2, 3-propylene sultone, methylene methane disulfonate, ethylene sulfate, trifluoromethanesulfonic anhydride, pentaerythritol dicyclosulfate, tri (trimethylsilane) phosphate, tri (trimethylsilane) phosphite, tri (trimethylsilane) borate, tri (trimethylsilane) phosphate and tri (trimethylsilane) borate. The electrolyte provided by the invention not only keeps high coulombic efficiency at low temperature, but also has good cycle stability at high temperature.

The invention discloses a sodium-ion battery electrolyte and a preparation method thereof, and relates to the technical field of sodium-ion batteries, the electrolyte comprises a sodium salt, a composite solvent, an additive and an auxiliary agent, the sodium salt is formed by compounding sodium bis (fluorosulfonyl) imide, sodium bis (trifluoromethanesulfonyl) imide and modified sodium bis (oxalato) borate, and the composite solvent is formed by compounding sulfolane, 1, 3-butanediol, 1, 3-butanediol, 1, 3-butanediol, 1, 3-butanediol, 1, 3-butanediol, 1, 3-butanediol, 1, 3-butanediol, 1, 3-butanediol and 1, 3-butanediol. The auxiliary agent is nano-scale ZIF-8, the additive is 1, 3-propylene glycol dimethyl ether, dimethyl carbonate, fluoroethylene carbonate and ethyl acetate, the additive is modified 1, 3-propane sultone, trimethyl phosphate and hydroquinone dimethyl ether, and the auxiliary agent is nano-scale ZIF-8. According to the electrolyte, sodium bis (oxalato) borate is modified after being treated by hydrogen peroxide and has efficient hydrofluoric acid resistance, meanwhile, hydrofluoric acid generated by the reaction of fluorine-containing sodium salt and water in the electrolyte can be specifically removed by utilizing an auxiliary agent of the nano ZIF-8 and a synergistic effect formed by the sodium salt and the auxiliary agent, and damage of the hydrofluoric acid to a negative electrode SEI film is avoided; and the cycle life of the sodium ion battery is prolonged.

Systems and methods are provided for using electrolytic compositions in lithium ion batteries. In one example, an electrolytic composition may include vinylene carbonate, fluoroethylene carbonate, 1,3-propane sultone, ethylene sulfite, and a conducting salt including no less than 80 mol % of lithium bis(fluorosulfonyl)imide. In this way, a capacity retention of the lithium ion battery may be maintained, such as during high-temperature storage at 100% state of charge.

This invention discloses a silicon-based anode binder for lithium-ion batteries and its preparation method, relating to the field of silicon-based anode technology. The method includes first ring-opening sulfonation of polyetheramine with 1,3-propanesulfonyl lactone in an aqueous phase to obtain sulfonated polyetheramine; then, polyacrylic acid is activated by EDC·HCl and NHS and then amidated and grafted onto the sulfonated polyetheramine to obtain sulfonated polyetheramine-grafted polyacrylic acid; finally, the aqueous solution of this graft is in-situ coordinated with 2-methylimidazole and zinc nitrate to generate ZIF-8 nanoparticles, and then succinic acid and choline chloride are added for regulation to obtain the binder. This invention achieves dual modification through molecular grafting of flexible sulfonated polyether segments and in-situ construction of a three-dimensional ZIF-8 conductive network, utilizing succinic acid and choline chloride to eliminate competitive coordination of active groups, significantly improving ionic conductivity and stabilizing the electrode structure.

The invention relates to a preparation method of 3-(piperazine-1-yl) propane-1-sulfonic acid, and relates to the technical field of organic chemical synthesis. The preparation method of the 3-(piperazine-1-yl) propane-1-sulfonic acid comprises the following steps: feeding and stirring, dropwise adding and mixing, carrying out temperature-controlled reaction, and purifying and drying. The cosolvent activates amino groups and inhibits side reactions, complete reaction of the substrate 1, 3-propane sultone is ensured through excessive piperazine, generation of by-products is reduced in the dropwise adding process, the temperature control reaction equilibrium rate is achieved, purification treatment is conducted through the pulping agent in the final purification and drying stage, reaction impurities are effectively removed, and it is finally guaranteed that the product purity meets the pharmaceutical grade requirement; the whole technological process is simple, the production period is shortened, and labor and time cost is reduced.

The application discloses a kind of sodium ion battery electrolyte and preparation method thereof, it is related to sodium ion battery technical field, the electrolyte includes: sodium salt, composite solvent, additive and auxiliary agent, the sodium salt is sodium difluorosulfurylimide, sodium bis-trifluoromethanesulfonimide and modified sodium borate dihydroxide dioxalate compound composition, composite solvent is sulfolane-1,3-propanediol dimethyl ether, dimethyl carbonate, fluoroethylene carbonate and ethyl acetate, additive is modified 1,3-propane sulfone lactone, trimethyl phosphate and hydroquinone dimethyl ether, auxiliary agent is nano ZIF-8.This electrolyte sodium borate dihydroxide dioxalate is modified after hydrogen peroxide treatment, with high-efficiency anti-hydrofluoric acid capacity, while using the auxiliary agent of nano ZIF-8, sodium salt and auxiliary agent form synergistic effect can be targeted to remove hydrogen fluoride sodium salt and moisture reaction generated in electrolyte hydrofluoric acid, avoid the damage of hydrofluoric acid to negative electrode SEI film, and then improve the cycle life of sodium ion battery.

The invention provides a supramolecular ion separation membrane with an asymmetric functionalized nano-channel structure as well as a preparation method and application thereof, and relates to the field of separation membranes. The preparation method of the supramolecular ion separation membrane comprises the following steps: flatly attaching a covalent organic framework ion separation membrane to a polyacrylonitrile substrate to obtain a composite membrane; the membrane is installed in an H-shaped reactor, and only one side of the membrane is exposed in a reaction solution environment; the preparation method comprises the following steps: dissolving 1, 3-propane sultone in an organic solvent to obtain a sultone solution; injecting the sultone solution into a reaction chamber, close to the surface of a membrane, in an H-type reactor, so that the sultone solution and the-NH-active sites exposed on the surface of the membrane are subjected to a ring-opening reaction; after the reaction is completed, washing the obtained membrane sample with methanol and water; and drying to obtain the target supramolecular ion separation membrane. The membrane material provided by the invention is good in performance, can still maintain stable ion screening performance in a high-salt environment, can be applied to water treatment, and has a good industrial application prospect.

The present invention provides a non-aqueous electrolyte solution for a lithium secondary battery comprising a lithium salt, an organic solvent and an additive, wherein the additive includes an anion having a sulfone imide group and a propane sultone group or an ethylene sulfate group.

The invention relates to the technical field of electrochemistry, in particular to an electrolyte and a secondary battery. The electrolyte comprises an organic solvent, an electrolyte and additives, the additives comprise a first additive, a second additive and a film-forming additive, the first additive is selected from at least one of compounds shown in the formula I, the second additive is selected from at least one of compounds shown in the formula II, and the film-forming additive is selected from at least one of compounds shown in the formula II. The film-forming additive is selected from at least one of vinylene carbonate, vinylethylene carbonate, fluoroethylene carbonate, ethylene sulfate, 1, 3-propane sultone, lithium difluorophosphate and lithium bis (oxalato) borate, and the first additive, the second additive and the film-forming additive have a synergistic effect, so that a composite film with a stable structure can be formed on the surface of an electrode; and the transmission of lithium ions on an electrode / electrolyte interface is facilitated, so that the high-temperature performance of the secondary battery and the cycle performance of the secondary battery under high voltage are improved.

The invention provides a battery and an electronic device, the battery comprises a negative plate, a positive plate and an electrolyte, a positive active material layer of the positive plate is provided with a tab groove, a positive tab is accommodated in the tab groove, and the surface of the positive tab is provided with first adhesive paper; a groove is formed in a negative active material layer of the negative plate, the tab groove and the groove are oppositely arranged in the thickness direction of the positive plate, second adhesive paper is arranged in the groove, and the orthographic projection area of the second adhesive paper in the thickness direction of the positive plate is S; the electrolyte comprises ethylene carbonate, fluoroethylene carbonate and 1, 3-propane sultone, the sum of the mass content percentage of the ethylene carbonate and the fluoroethylene carbonate in the electrolyte is w1, and the mass content percentage of the 1, 3-propane sultone in the electrolyte is w2; wherein S and w1 satisfy 0.5 < = w1 / S < = 25. According to the battery disclosed by the invention, excellent high-temperature cycling stability of the lithium battery can be ensured, and meanwhile, better battery safety performance can be met.

The application relates to the technical field of batteries, in particular to an electrolyte suitable for primary lithium-manganese batteries and a preparation method thereof. The electrolyte comprises propylene carbonate, ethylene carbonate, lithium bisfluorosulfonylimide, lithium perchlorate, lithium bisoxalate borate, terminal bisdifluorophosphorylated oligomeric trimethylene carbonate, ethylene glycol dimethyl ether, lithium difluorooxalate borate and 1,3-propane sultone. The electrolyte is prepared through a pre-coordination and segmented dilution process with specific timing. The electrolyte system can synergistically optimize the electrode interface film forming process, has high discharge capacity retention rate and low direct current resistance at low temperature (-20 DEG C), and has high capacity retention rate after high-temperature storage (60 DEG C), thereby significantly improving the comprehensive performance of the primary lithium-manganese battery in a wide temperature range.

A battery cell, a battery device, and an electric device. The battery cell comprises an electrode assembly and an electrolyte, wherein the electrode assembly comprises a positive electrode sheet and a negative electrode sheet; the positive electrode sheet comprises a lithium-containing phosphate; the negative electrode sheet comprises graphite particles; the electrolyte comprises a carboxylate ester solvent, a linear carbonate solvent, and an additive; the mass content of the carboxylate ester solvent is 10% to 30%; the mass content of the linear carbonate solvent is 10% to 50%; the mass content of the additive is 3% to 9%; the additive comprises 1,3-propane sultone having a mass content greater than or equal to 0, an ethylene carbonate derivative having a mass content greater than or equal to 0, and vinylene carbonate having a mass content greater than 0; and the ethylene carbonate derivative comprises a compound represented by formula A, wherein in formula A, Q1, Q2, Q3, and Q4 each independently comprise any one of a hydrogen atom, a halogen atom, a C1 to C5 alkyl group, or a C1 to C5 haloalkyl group, and Q1, Q2, Q3, and Q4 are not simultaneously hydrogen atoms.

The invention relates to the field of battery electrolytes, in particular to an additive, an electrolyte containing the additive and a battery containing the electrolyte, the additive is trimethylsiloxy nitrile, and the electrolyte comprises an organic solvent, an electrolyte lithium salt and an additive, the additive in the electrolyte comprises one or more of trimethylsiloxy nitrile, fluoroethylene carbonate, ethylene sulfate, vinylene carbonate and 1, 3-propane sultone; the electrolyte lithium salt is a mixed lithium salt of lithium hexafluorophosphate and lithium difluorophosphate; the organic solvent comprises one or more of carbonic ester, carboxylic ester, fluoro-carbonic ester and fluoro-carboxylic ester. According to the additive, the electrolyte containing the additive and the battery containing the electrolyte, the cycle performance and the high-temperature performance of the ternary high-nickel lithium ion battery can be improved.

Electrolyte composition for batteries, the electrolyte composition comprising: ethylene carbonate; Diethyl carbonate; Ethyl methyl carbonate; vinylethylene carbonate; vinyl carbonate; Propane-1,3-sultone; ethylene sulfate; and lithium difluorophosphate; and wherein the ethylene carbonate, the diethyl carbonate and the ethyl methyl carbonate are each present in the electrolyte composition in an amount of 10 parts by weight to 50 parts by weight based on 100 parts by weight of the electrolyte composition; wherein the ethylene carbonate, the diethyl carbonate and the ethyl methyl carbonate are present in a ratio of 1:1:1; wherein the vinylethylene carbonate is present in the electrolyte composition at 0.5 parts by weight based on 100 parts by weight of the electrolyte composition; wherein the vinyl carbonate is present in the electrolyte composition at 1.0 part by weight based on 100 parts by weight of the electrolyte composition; and wherein the propane-1,3-sultone is present in the electrolyte composition at 1.5 parts by weight based on 100 parts by weight of the electrolyte composition.

The application discloses a sewage treatment filtering membrane and a preparation method thereof, and relates to the technical field of membrane materials. In the preparation of the sewage treatment filtering membrane, an amphoteric ion intermediate is reacted with 1,3-propane sulfone lactone to obtain an amphoteric ion monomer; the amphoteric ion monomer and N,N-methylene bisacrylamide are in-situ cross-linked and polymerized in a polyvinylidene fluoride solution to obtain a casting solution; the casting solution is used to prepare a functionalized polyvinylidene fluoride membrane through a non-solvent induced phase separation technology; hydrochloric acid dopamine and polyethylene imine are co-deposited on the surface of the functionalized polyvinylidene fluoride membrane to obtain a porous polyvinylidene fluoride membrane; and copper sulfate pentahydrate is used to catalyze modified indole derivatives to be grafted on the surface of the porous polyvinylidene fluoride membrane, so as to obtain the sewage treatment filtering membrane. The sewage treatment filtering membrane prepared by the application has excellent hydrophilic, anti-pollution and antibacterial properties.

The invention provides an electrolyte for a capacitor, the electrolyte comprises a sodium salt, an organic solvent and an additive, and the additive comprises an inorganic additive and an organic additive; the inorganic additive comprises at least one of sodium tetrafluoroborate and sodium difluoro (oxalato) borate; the organic additive comprises at least one of vinylene carbonate, 1, 3-propane sultone, ethylene sulfate, tris (2, 2, 2-trifluoroethyl) phosphite, ethyoxyl (pentafluoro) cyclotriphosphazene, methyl nonafluorobutyl ether, biphenyl, tris (trimethylsilyl) phosphite and trimethoxy (perfluorophenyl) silane, and the organic additive comprises at least one of ethylene carbonate, 1, 3-propane sultone, ethylene sulfate, tris (2, 2, 2-trifluoroethyl) phosphite, ethyoxyl (pentafluoro) cyclotriphosphazene, methyl nonafluorobutyl ether, biphenyl, tris (trimethylsilyl) phosphite and trimethoxy (perfluorophenyl) silane. When the electrolyte is applied to the sodium metal capacitor, the sodium metal capacitor can have excellent cycle stability and cycle life.

An electrolyte, a secondary battery, and an electronic device. The electrolyte comprises ethyl 2,2-difluoroacetate, 1,2,3-tris(2-cyanoethoxy)propane, and 1,3-propane sultone. Based on 100 parts by mass of the electrolyte, ethyl 2,2-difluoroacetate accounts for 1.5 to 6 parts by mass, 1,2,3-tris(2-cyanoethoxy)propane accounts for 0.5 to 4 parts by mass, and 1,3-propane sultone accounts for 1 to 5.5 parts by mass. The overcurrent and overtemperature safety of secondary batteries are improved.

The present application relates to the technical field of chemical production, and particularly relates to a 1,3-propane sulfone lactone distillation kettle residue treatment process.The present application comprises the following steps: (1) adding water to 1,3-propane sulfone lactone distillation residue liquid, refluxing and hydrolyzing to obtain a hydrolyzed solution; (2) performing precision filtration on the hydrolyzed solution to remove insoluble substances and obtain a filtrate; (3) performing ion exchange on the filtrate by using an anion exchange resin, so that 3-hydroxy propane sulfonic acid is adsorbed by the anion exchange resin; (4) using a strong alkali solution to elute the anion exchange resin to obtain a 3-hydroxy propane sulfonic acid sodium solution.The process of the present application only uses water, an anion exchange resin and a strong alkali solution, does not need to use a low flash point solvent or a strong acid / strong alkali to directly react, and only comprises four steps of hydrolyzing, filtering, anion exchange resin adsorbing and alkali washing desorbing, so that the process flow is simplified, the process time is short, the operation is simple, the safety is high, and the purity of the obtained product reaches more than 97%.

A battery cell, a battery device, and an electric device. The battery cell comprises an electrode assembly and an electrolyte. The electrode assembly comprises a positive electrode sheet and a negative electrode sheet. The positive electrode sheet comprises a lithium-containing phosphate having an olivine structure. The negative electrode sheet comprises graphite particles. The electrolyte comprises a carboxylic ester solvent and a first additive. The thickness of a single-sided negative electrode film layer is 50 μm to 75 μm. The volume average particle size of the graphite particles is 8.5 μm to 13.5 μm. On the basis of the mass of the electrolyte, the mass content of the carboxylic ester solvent is 8% to 60%, the total mass content of the first additive is 3% to 10%, and the first additive comprises 1,3-propane sultone having a mass content greater than or equal to 0, an ethylene carbonate derivative having a mass content greater than or equal to 0, and vinylene carbonate having a mass content greater than or equal to 3%. The battery cell has improved fast charging performance and cycle performance at high energy density.

The invention relates to a lithium ion battery and a preparation method thereof. The lithium ion battery comprises a positive pole piece, a diaphragm, a negative pole piece and an electrolyte, the positive pole piece comprises a high-moisture-sensitive positive pole active material, the specific surface area of the positive pole active material is 5m / g-80m / g, and the residual moisture content of the dried positive pole piece is 200ppm-400ppm; the electrolyte comprises a lithium salt, a solvent, a film-forming agent, an auxiliary agent and a hydrogen elimination agent, the film-forming agent is prepared from 1, 3-propane sultone and 0.3 percent to 1.0 percent of ethylene sulfate; the auxiliary agent is tris (trimethylsilane) phosphate; the hydrogen eliminating agent is ammonium p-nitrobenzoate. The lithium ion battery can be compatible with the positive pole piece with relatively high residual moisture, and side reaction caused by the positive pole piece can be effectively inhibited through an electrolyte system with a special formula, so that excellent electrochemical performance and safety are obtained.

The present invention relates to a nonaqueous electrolyte comprising a lithium salt, an organic solvent, and an additive, wherein the additive comprises a compound represented by Chemical Formula 1, the additive comprises at least one of the compound represented by Chemical Formula 1, ethylene sulfate, and 1,3-propane sultone, the content of the compound represented by Chemical Formula 1 in the nonaqueous electrolyte is 0.25 to 1.60% by weight based on the total weight of the nonaqueous electrolyte, and the total content of the compound represented by Chemical Formula 1, ethylene sulfate, and 1,3-propane sultone can be 0.25 to 1.60% by weight.[Chemical Formula 1]In Chemical Formula 1, R1 is -O-NO2, L1 is an alkylene oxy group having 1 to 5 carbon atoms, M is a metal cation or an organic cation, a is the valence of M when M is a metal cation, a is 1 when M is an organic cation, and a = b.

The application provides a secondary battery and an electronic device, and belongs to the technical field of energy storage. The secondary battery comprises an electrolyte and a shell; the electrolyte comprises an additive; the additive comprises at least one of fluoroethylene carbonate, vinylene carbonate and 1,3-propane sultone; the mass content of the additive is X% based on the total mass of the electrolyte, and 1.2<=X<=30; the material of the shell is a steel shell; the shell comprises a gas escape hole, the area of the gas escape hole is A mm 2 ; and 0.3<=X / A<=25 is met. Through control of the components and content of the electrolyte and the relationship between the electrolyte and the gas escape hole, the application can effectively inhibit the gas generation phenomenon in the formation process and improve the qualified rate of battery production.

The present invention provides a cylindrical lithium secondary battery including an electrode assembly in which a positive electrode plate, a negative electrode plate, and a separator interposed between the positive electrode plate and the negative electrode plate are wound in one direction, a battery can in which the electrode assembly is housed, an electrolyte injected into the battery can, and a seal for sealing an open end of the battery can, wherein the positive electrode plate and the negative electrode plate each include a plain portion on which no active material layer is formed, and at least a portion of the plain portion of the positive electrode plate or the plain portion of the negative electrode plate defines an electrode tab, and the cylindrical lithium secondary battery has a form factor ratio of 0. The present invention relates to a cylindrical lithium secondary battery, wherein the electrolyte contains a lithium salt, an organic solvent, and an additive, and the additive contains a compound represented by Chemical Formula 1, a cyclic carbonate compound, and 1,3-propane sultone, the compound represented by Chemical Formula 1 being contained in an amount of 0.5 wt% to 5.0 wt% based on the total content of the electrolyte, and the compound represented by Chemical Formula 1, the cyclic carbonate compound, and 1,3-propane sultone being contained in a weight ratio of 1:0.5:0.2 to 1:20:10.

The invention belongs to the field of batteries, and particularly discloses an electrolyte and a battery using the electrolyte. The electrolyte comprises a metal salt and an organic solvent, the electrolyte further comprises an electrolyte additive, and the electrolyte additive comprises a compound shown in the formula (I) and at least one selected from fluoroethylene carbonate, 1, 3-propane sultone, vinylene carbonate, vinylethylene carbonate, ethylene sulfate and lithium difluorophosphate. When the electrolyte additive is added into the electrolyte, the transmission kinetics of lithium ions in the electrolyte can be improved, the cycle performance of a battery applying the electrolyte at high and low temperatures and the storage stability of the battery at high temperature are improved, and meanwhile, the electrolyte additive has a protection effect on a positive electrode; and the oxidation degree of the solvent on the positive electrode is reduced, so that side reactions are reduced.

The application discloses a kind of high dispersion stability ultra-low structure carbon black material and its application.The material is prepared by the reaction of 3,4-dihydroxyphenethylamine, carbonyl coupling agent, N,N-dimethyl-1,3-propanediamine and 1,3-propane sulfolane to obtain a reactive low-melting micro-phase auxiliary agent, which is then dispersed in ethylene tar after compounding with urea and choline acetate, and is prepared by incomplete combustion, quenching, elution and homologous stabilization treatment. The application utilizes the micro-phase isolation effect of the composite micro-phase auxiliary agent during the formation of carbon black, reducing the branching degree of carbon black aggregates; and through post-treatment, a stable layer containing catechol / quinoxaline anchoring structure and sulfobetaine hydration structure is formed, improving the water-based dispersion stability of carbon black. The obtained carbon black material has the advantages of low structure, low metal residue, narrow particle size distribution and good anti-settling property, and can be used in water-based paint, water-based ink, water-based conductive paste and water-based polymer composite.

The present application relates to the technical field of battery, in particular to a lithium ion secondary battery. The lithium ion secondary battery comprises an electrolyte and a negative electrode sheet. The electrolyte comprises methyl trifluoropropionate and a first additive. The content of methyl trifluoropropionate is A, and the content of the first additive is B, based on the total weight of the electrolyte, 10%≤A+B≤35%. The first additive comprises fluoroethylene carbonate and 1,3-propane sultone. The content ratio of fluoroethylene carbonate to 1,3-propane sultone is 1-20. The negative electrode sheet comprises a negative electrode active material. The negative electrode active material comprises a silicon-based material. The average particle size of the silicon-based material is D, and D is 6-20 μm. The lithium ion secondary battery can relieve volume expansion, and has good high-temperature floating and low-temperature discharging performance.

Disclosed in the present application are an electrolyte and a battery, the electrolyte comprising a lithium salt, an organic solvent, a first additive and a second additive; the first additive is represented by formula I, and the second additive comprises at least one of 1,3-propane sultone, 1,3-propene sultone, ethylene sulfate, methylene methanedisulfonate and a compound represented by formula II; in formula I, R1, R2, R3, R4, R5, R6, R7 and R8 are each independently selected from any one of hydrogen, halogen, alkyl and haloalkyl. Introducing both the first additive and the second additive into the electrolyte can improve the cycle performance and the high and low temperature performance of lithium batteries, thereby prolonging the service life.

The invention discloses a hymexazol and sodium trichloroisocyanurate compounded bactericidal composition, which takes hymexazol and sodium trichloroisocyanurate as main active ingredients, and the mass ratio of hymexazol to sodium trichloroisocyanurate is (1: 1)-(200: 1); the bactericidal composition further comprises 1, 3-propane sultone; the ratio of the total amount of hymexazol and sodium trichloroisocyanurate to the mass of 1, 3-propane sultone is (30: 1)-(90: 1). The invention also discloses application of the bactericidal composition in prevention and treatment of downy mildew, fusarium wilt, damping off and black spot of plants. Compared with a single agent of hymexazol, the bactericidal composition provided by the invention can improve the problem that hymexazol is easy to generate resistance, and widens the application range of the agent. The bactericide composition can replace some high-toxicity bactericides, the dosage is reduced, the environment is protected, and meanwhile pesticide residues are reduced. According to the invention, 1, 3-propane sultone is used as a synergist, so that the pesticide effect is enhanced.