280 results about "Propane sultone" patented technology

The invention relates to a battery monomer, a battery device and a power utilization device, the battery monomer comprises an electrode assembly and an electrolyte, and the electrode assembly comprises a positive pole piece and a negative pole piece; the positive pole piece comprises a positive pole current collecting part and a positive pole film layer; the positive pole film layer comprises lithium-containing phosphate with an olivine structure; the negative pole piece comprises a negative pole current collecting part and a negative pole film layer, and the negative pole film layer comprises a carbon-based material; the electrolyte comprises a carboxylic ester solvent, a first additive and fluorine-containing lithium sulfimide, and the mass content of the carboxylic ester solvent is 8%-60%; the total mass content of the first additive is 2.5%-10%, the first additive comprises 1, 3-propane sultone with the mass content larger than or equal to 0, an ethylene carbonate derivative with the mass content larger than or equal to 0 and vinylene carbonate with the mass content larger than 0, and the ethylene carbonate derivative comprises a compound shown in the formula A; the mass content of the fluorine-containing lithium sulfimide is 4%-8%. According to the invention, the rapid charging performance and the cycle performance of the battery monomer can be improved. # imgabs0 # formula A

The invention relates to a battery monomer, a battery device and a power utilization device, the battery monomer comprises an electrode assembly and an electrolyte, and the electrode assembly comprises a positive pole piece and a negative pole piece; the positive pole piece comprises lithium-containing phosphate with an olivine structure; the negative pole piece comprises graphite particles; the electrolyte comprises a carboxylic ester solvent and a first additive, the thickness of the single-side negative electrode film layer is 50 microns to 75 microns, and the volume average particle size of the graphite particles is 8.5 microns to 13.5 microns; based on the mass of the electrolyte, the mass content of the carboxylic ester solvent is 8%-60%, the total mass content of the first additive is 3%-10%, the first additive comprises 1, 3-propane sultone with the mass content larger than or equal to 0, an ethylene carbonate derivative with the mass content larger than or equal to 0 and vinylene carbonate with the mass content larger than or equal to 3%, and the ethylene carbonate derivative comprises a compound shown in the formula A. According to the invention, the rapid charging performance and the cycle performance of the battery monomer under high energy density can be improved. # imgabs0 # formula A

The embodiment of the invention relates to the technical field of batteries, and provides a preparation method of a lithium ion battery, which comprises the following steps: winding or laminating a positive plate, a negative plate and a diaphragm, and putting into a shell to form an initial battery cell; in the step of the first liquid injection process, a first electrolyte is injected into the initial battery cell, and the first electrolyte comprises the following components: 0.5 wt%-2wt% of vinylene carbonate, 5wt%-15wt% of lithium salt and a non-aqueous organic solvent; performing a formation process on the initial battery cell; in the step of the second liquid injection process, a second electrolyte is injected into the initial battery cell, and the second electrolyte comprises the following components: 5wt%-20wt% of vinylene carbonate, 5wt%-15wt% of lithium salt, 0.005 wt%-30wt% of an infiltration stabilizer and a non-aqueous organic solvent; wherein the first electrolyte or the second electrolyte further comprises at least one of 1, 3-propane sultone or fluoroethylene carbonate, so that the lithium ion battery is at least favorably kept to have high energy efficiency and long cycle life under the condition of low liquid injection amount.

The invention relates to the technical field of electrolytes, and discloses a sulfonate additive containing a silicon-oxygen bond, an electrolyte and an electrochemical device, the additive is a sulfonate organic compound containing the silicon-oxygen bond, the additive is added into the electrolyte, the gas production effect of battery formation can be inhibited, and the high-temperature cycle performance of a battery can be improved. According to the sulfonate additive containing the silicon-oxygen bond, the use amount of a high-risk substance 1, 3-propane sultone in an electrolyte can be reduced, the use amount of the 1, 3-propane sultone can be remarkably reduced on the premise that the formation gas production effect and the high-temperature cycle performance of a battery are not remarkably changed, and the use amount of the 1, 3-propane sultone can be remarkably reduced on the premise that the high-temperature cycle performance of the battery is remarkably improved. The 1, 3-propane sultone belongs to a high-risk cancerogenic substance, and the safety risk of the battery can be remarkably reduced by reducing the dosage of the 1, 3-propane sultone in the electrolyte.

The present invention provides a multifunctional silane coupling agent, which is prepared from commercially available 3-aminopropylsilane coupling agent, acryloxy polyetheramine, and one of an alkylating agent, polyether sulfonate, γ-propane sultone or γ-butyrolactone through Michael addition reaction and quaternization reaction. The multifunctional silane coupling agent is a new variety carrying zwitterions, quaternary ammonium cations and polyether chains, enriching the functions and application scope of silane coupling agents. It can endow some modified materials with surface hydrophilicity, conductivity, antibacterial, antifogging, antifouling, biocompatibility, anticoagulant and wet lubrication properties, etc. at the same time.

The invention discloses an oil field desulfurizer and a preparation method thereof. The preparation method comprises the following steps: dissolving 1, 3-propane sultone in toluene, dropwise adding equimolar 1-methylimidazole under an ice-water bath, and heating to room temperature for reaction after dropwise adding; separating out a product after the reaction is finished, and dropwise adding equimolar concentrated sulfuric acid to obtain imidazole ionic liquid; mixing the imidazole ionic liquid with a catalytic promoter to obtain a catalyst; the preparation method comprises the following steps: adding paraformaldehyde, a triazine compound and a catalyst into a solvent, heating to 50-90 DEG C, controlling a reflux reaction for 6-9 hours, and after the reaction is finished, carrying out reduced pressure distillation to remove the solvent and separate out the catalyst, thereby obtaining the oil field desulfurizer. The desulfurizer is a modified triazine compound with a novel structure, N and lateral branch functional groups on a triazine ring of the desulfurizer can react with hydrogen sulfide, and compared with a conventional triazine desulfurizer, a plurality of desulfurization points are added, so that the sulfur capacity is greatly improved.

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 all-vanadium redox flow battery diaphragms, and particularly discloses a sulfonated polyetheretherketone / polyaniline composite membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing polyetheretherketone and concentrated sulfuric acid, and carrying out water bath heating reaction to prepare a sulfonated polyetheretherketone solid; molybdenum disulfide and methylbenzene are mixed and subjected to ultrasonic treatment, 1, 3-propane sultone is added, oil bath heating is conducted, and sulfonated molybdenum disulfide powder is prepared; the preparation method comprises the following steps: mixing and stirring sulfonated molybdenum disulfide powder, polyaniline and a DMF (Dimethyl Formamide) solution, performing ultrasonic treatment, adding a sulfonated polyether-ether-ketone solid, stirring to obtain membrane casting slurry, coating a glass plate with the membrane casting slurry, drying to form a membrane, and soaking the membrane in a sulfuric acid solution and deionized water in sequence to obtain the sulfonated polyether-ether-ketone / polyaniline composite membrane. The invention discloses a sulfonated polyetheretherketone / polyaniline composite membrane as well as a preparation method and application thereof. The sulfonated polyetheretherketone / polyaniline composite membrane has high proton conductivity, can maintain relatively low vanadium ion permeability and can improve the electrochemical performance of an all-vanadium redox flow battery.

The invention discloses a concave-convex high-skid-resistance archaized brick and a preparation process thereof, and relates to the field of building materials. When the concave-convex high-skid-resistance archaized brick is prepared, ferrochrome waste residues, coal ash, argil, quartz sand, clay powder and red soil powder are subjected to mold pressing and roasting, and a green brick is prepared; mixing albite, quartz, calcite, zinc oxide, barium carbonate, deionized water, water glass and American water, glazing the surface of a green brick, and roasting to obtain an archaized brick matrix; the archaized brick base body is sequentially subjected to a reaction with 3-aminopropyltrimethoxysilane, 5, 7-dihydroxyflavone, 1H, 1H-perfluorooctylamine and 1, 3-propane sultone, and the concave-convex high-skid-resistance archaized brick is prepared. The concave-convex high-skid-resistance archaized brick prepared by the invention has good antibacterial, antifouling and coating durability effects.

The invention relates to a battery monomer, a battery device and a power utilization device. The battery monomer comprises a positive pole piece and a negative pole piece, the positive pole piece comprises lithium-containing phosphate; the negative pole piece comprises graphite particles; the electrolyte comprises a carboxylic ester solvent, a linear carbonic ester solvent and an additive, the mass content of the carboxylic ester solvent is 10%-30%, and the mass content of the linear carbonic ester solvent is 10%-50%; the mass content of the additive is 3%-9%, the additive comprises 1, 3-propane sultone with the mass content larger than or equal to 0, an ethylene carbonate derivative with the mass content larger than or equal to 0 and vinylene carbonate with the mass content larger than 0, and the ethylene carbonate derivative comprises a compound shown in the 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 halogenated alkyl group, and Q1, Q2, Q3 and Q4 are not hydrogen atoms at the same time. # imgabs0 # formula A is shown in the specification.

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 provides a bacteriostatic high-barrier nano-cellulose-based composite film for fruit and vegetable preservation and a preparation method thereof, and the preparation method comprises the following steps: carrying out sulfonation modification treatment on nano-cellulose powder by using 1, 3-propane sultone to obtain sulfonated nano-cellulose; then, octadecyl trimethyl ammonium chloride is adopted for conducting quaternization modification treatment on the sulfonated nano-crystalline cellulose, and quaternary ammonium sulfonated nano-crystalline cellulose is obtained; the preparation method comprises the following steps: dispersing silver-loaded chitosan in deionized water to obtain a silver-loaded chitosan solution, adding montmorillonite into the silver-loaded chitosan solution, mixing, stirring and heating, and then carrying out suction filtration, washing and drying to obtain intercalated montmorillonite; the preparation method comprises the following steps: uniformly mixing polylactic acid, quaternary ammonium sulfonated nano-cellulose, intercalated montmorillonite, a plasticizer, a lubricant and an antioxidant to obtain a mixed material, and sequentially carrying out melt extrusion, cooling, pelletizing and film blowing on the mixed material to obtain the antibacterial high-barrier nano-cellulose-based composite film.

The invention provides a preparation method of 1, 3-propane sultone, which comprises the following steps: introducing an allyl alcohol aqueous solution, a sodium hydroxide aqueous solution, sulfur dioxide and a slow-release peroxide into a continuous fluid reactor, reacting to obtain a 3-hydroxy propane sodium sulfonate crude product, acidifying the crude product to obtain 3-hydroxy propane sulfonic acid, concentrating to remove water, separating out salt by using methanol, and filtering to obtain 1, 3-propane sultone. And finally carrying out reduced pressure distillation on the filtrate to obtain 1, 3-PS. The slow-release peroxide is used for replacing conventional hydrogen peroxide or benzoyl peroxide to serve as an initiator, the preparation process conditions of the slow-release peroxide are controlled, calcium peroxide is embedded through stearic acid firstly, then surface modification polydopamine is subjected to secondary embedding, and the slow-release peroxide of a special structure is obtained; the selectivity of the 3-hydroxypropane sodium sulfonate is obviously improved while the reaction efficiency is not excessively influenced, and the method has industrial advantages.

The invention relates to a wide-temperature-range high-voltage electrolyte, a lithium battery and a preparation method of the lithium battery. The wide-temperature-range high-voltage electrolyte comprises a lithium salt, an electrolyte solvent, a first additive, a second additive and a third additive, wherein the first additive is fluoroethylene carbonate; the second additive is at least one of 1, 3-propane sultone and propylene sulfite; and the third additive is at least one of dimethoxy (methyl) (3, 3, 3-trifluoropropyl) silane and trimethylsilyl phosphite ester.

The invention provides a preparation method and application of a dual-cleaning polytetrafluoroethylene microporous membrane, and the preparation method comprises the following steps: 1) heating polyethyleneimine and 1, 3-propane sultone in one step to form a polyion liquid, and dissolving the polyion liquid and dopamine in a Tris aqueous alkali to obtain a buffer reaction liquid; 2) soaking a polytetrafluoroethylene microporous membrane in a buffer reaction solution, heating and reacting, and then taking out to obtain a first microporous membrane; 3) soaking the first microporous membrane in a ferric chloride hexahydrate aqueous solution for heating reaction, and then taking out the first microporous membrane to obtain a second microporous membrane; 4) soaking the second microporous membrane in a copper acetate methanol solution for heating reaction, and then taking out to obtain a third microporous membrane; 5) soaking the third microporous membrane in a methanol solution of 2, 5-dihydroxy terephthalic acid, heating and reacting, and then taking out to obtain a fourth microporous membrane; and 6) washing and drying the fourth microporous membrane to obtain the dual self-cleaning polytetrafluoroethylene microporous membrane. The dual self-cleaning polytetrafluoroethylene microporous membrane is high in separation efficiency, high in flux recovery rate and low in pollution rate in treatment of high-viscosity emulsified oil-containing wastewater.

The invention discloses a negative-electrode-free sodium ion battery, which comprises a positive plate, a negative plate, a diaphragm and an electrolyte, the positive plate comprises a positive current collector, the surface of the positive current collector is coated with a positive active material, a positive conductive agent and a positive binder, the negative plate comprises a negative current collector, the surface of the negative current collector is coated with a carbon nanotube and polyvinylidene fluoride, the negative electrode current collector is a copper foil, the electrolyte comprises sodium salt and an organic solvent, the sodium salt is sodium nitrate, and the organic solvent comprises fluoroethylene carbonate, 1, 3-propane sultone and dimethyl sulfoxide. The negative-electrode-free sodium ion battery has the beneficial effects that the negative electrode does not use active materials and only uses CNT and PVDF, so that more positive electrode active substances can be accommodated in the battery, more electric energy can be stored under the same volume, and the energy density of the negative-electrode-free sodium ion battery is improved. No negative electrode active material is introduced, so that the cost is reduced and the manufacturing process is simplified. And meanwhile, by optimizing an electrolyte system, the growth of sodium dendrites is effectively inhibited, and the cycle life of the battery is prolonged.

The invention provides a lithium secondary battery and a power utilization device. The lithium secondary battery comprises a positive electrode piece, a negative electrode piece and electrolyte, the negative electrode piece comprises a negative electrode current collector and a negative electrode film layer arranged on at least one side of the negative electrode current collector, the negative electrode film layer comprises a negative electrode active material, and the specific surface area a of the negative electrode active material is greater than or equal to 2m < 2 > / g and less than or equal to 5m < 2 > / g; the electrolyte comprises propylene carbonate, a first additive and a compound with a formula I, R is selected from halogen, n is an integer selected from 1-6, and the first additive comprises at least one of ethylene sulfate, vinylene carbonate, fluoroethylene carbonate, 1, 3-propane sultone, 1, 3-propene sultone, tetravinyl silane or methylene methanedisulfonate. The lithium secondary battery provided by the invention has relatively good low-temperature quick charge performance and also has cycle performance.

The invention relates to a secondary battery and an electronic device. Specifically, the secondary battery provided by the invention comprises a positive electrode, a negative electrode and an electrolyte, the negative electrode comprises a negative electrode current collector and a negative electrode material arranged on the negative electrode current collector, the particle size of the negative electrode material satisfies Dv10: Dv50: Dv99 = 1: (1.5-2.5): (5-6), the electrolyte comprises diethyl carbonate, ethylene carbonate and 1, 3-propane sultone, and relative to 100 parts by mass of the electrolyte, the particle size of the negative electrode material is 1: (1.5-2.5): (5-6). The content of the ethylene carbonate is 15-30 parts by mass, the content of the diethyl carbonate is 0.5-1.5 parts by mass, the content of the ethylene carbonate is 15-30 parts by mass, and the content of the 1, 3-propane sultone is 0.01-0.5 parts by mass. According to the invention, the over-current and over-temperature safety of the secondary battery can be improved.

The invention belongs to the technical field of battery materials, and particularly relates to a lithium ion battery electrolyte containing a cyano sulfonamide compound and a lithium ion secondary battery, the lithium ion battery electrolyte containing the cyano sulfonamide compound comprises an organic solvent, a lithium salt and an additive, the additive comprises at least one substance of fluoroethylene carbonate, ethylene sulfate, ethylene sulfite, 1, 3-propane sultone, 1, 3-propenyl sultone, vinylene carbonate and vinylethylene carbonate, and a cyano sulfonamide compound, and the additive comprises at least one substance of fluoroethylene carbonate, ethylene sulfate, ethylene sulfite, 1, 3-propane sultone, 1, 3-propenyl sultone, vinylene carbonate and vinylethylene carbonate; the invention relates to a lithium ion secondary battery which comprises a battery cell, a battery shell and electrolyte, the electrolyte additive, the organic solvent and the lithium salt of specific types are matched, so that the cycle performance of the lithium ion battery under high voltage can be effectively improved, and the lithium ion battery prepared from the lithium ion battery electrolyte has excellent cycle performance under high voltage.

The invention relates to the technical field of electrolyte, in particular to electrolyte, a lithium ion battery and a vehicle. The electrolyte comprises an organic solvent, fluorine-containing lithium salt and a first additive; the organic solvent comprises carboxylic ester and carbonic ester; the first additive comprises a combination of 1, 3-propane sultone and methylene methanedisulfonate; in terms of the total mass of the electrolyte being 100%, the content of the carboxylic ester is S1, the content of the 1, 3-propane sultone is W1, the content of the methylene methanedisulfonate is W2, and S1, W1 and W2 meet (S1 / 120) lt; (W1 + W2) lt; (S1 / 20). According to the electrolyte provided by the invention, through the synergistic effect of the organic solvent, the fluorine-containing lithium salt and the additive, the low-temperature conductivity is greatly improved, and the charging time of the battery at a low temperature is effectively shortened, so that the prepared lithium ion battery has excellent fast charging performance and low-temperature performance on the premise of not losing high-temperature performance.

The invention discloses a non-aqueous electrolyte for a sodium ion battery. The non-aqueous electrolyte comprises the following components in parts by weight: 70-85 parts of an organic solvent, 10-20 parts of an electrolyte, 0.5-5 parts of a first film-forming additive and 0.5-5 parts of a second film-forming additive, the first film-forming additive is selected from any one or more of 1, 3-propene sultone, 1, 3-propane sultone, methylene methanedisulfonate and 1, 4-butane sultone, and the second film-forming additive is selected from any one or more of 1, 3-propene sultone, 1, 3-propane sultone, methylene methanedisulfonate and 1, 4-butane sultone; the second film-forming additive is selected from any one or more of fluoroethylene carbonate, vinylene carbonate, ethylene sulfate, vinylene sulfate and ethylene sulfite; the electrolyte is composed of sodium hexafluorophosphate, sodium bis (oxalato) borate, sodium bis (fluorosulfonyl) imide and sodium tetrafluoroborate according to the weight ratio of (14-24): (0-1): (0-1): (0-1). By adding the first film-forming additive and the second film-forming additive, the battery film formation is facilitated, the cycle performance is improved, the service life of the sodium battery can be more effectively prolonged, and the sodium battery can be better applied to the fields of energy storage, low-speed vehicles and passenger vehicles.

The invention discloses a preparation method of an antibacterial moisture-permeable polyamide fiber and the antibacterial moisture-permeable polyamide fiber, and relates to the technical field of polyamide fibers. When the antibacterial moisture-permeable polyamide fiber is prepared, pretreated carbon nanotubes, ferric trichloride, sodium acetate trihydrate and diallyl disulfide are subjected to a microwave-assisted heating reaction, and carbon nanotube loaded nano iron sulfide is prepared; the preparation method comprises the following steps: modifying carbon nano tube loaded nano iron sulfide by using 3-aminopropyltriethoxysilane to prepare a modified carbon nano tube; mixing the modified carbon nanotubes and a nylon raw material, and performing melt spinning to obtain modified polyamide fibers; the modified polyamide fibers are modified with diethyl (3-aminopropyl) phosphate, 3-pyridylaldehyde and ethyl isocyano acetate, and flame-retardant modified polyamide fibers are prepared; and modifying the flame-retardant modified polyamide fiber with propane sultone to obtain the antibacterial moisture-permeable polyamide fiber. The prepared antibacterial moisture-permeable polyamide fiber has the advantages of being antibacterial, moisture-absorbing, antistatic, flame-retardant and high in tensile strength.

The invention relates to the technical field of electrolyte preparation, and discloses a lithium ion battery electrolyte capable of ensuring low-temperature discharge characteristic, which comprises the following components in percentage by mass: 25% of propylene carbonate (PC), 35% of dimethyl carbonate (DMC), 20% of gamma-butyrolactone (GBL), 20% of ethyl acetate, 1.0 mol / L of lithium salt bis (trifluoromethanesulfonimide) (LiTFSI), 3% of additive 1, 3-propane sultone (PS) (mass fraction: 0.1% of sodium hydroxide (mass fraction: 0.1% of sodium hydroxide), and the balance of water. According to the present invention, the low temperature performance of the solution is improved, the unique solvent formula and the unique solvent ratio enable the electrolyte to have good fluidity in the low temperature environment, and the freezing point of the electrolyte is effectively reduced so as to ensure that the lithium ions can smoothly migrate between the electrodes at the low temperature, such that the lithium ion battery performance is improved, and the lithium ion battery performance is improved. The discharge performance of the battery under a low-temperature condition is obviously improved, and the application scene of the lithium ion battery is expanded.

The invention relates to a preparation method of a low-sulfonation-degree sulfonated polyetheretherketone-based composite proton exchange membrane. According to the method, 1, 3-propane sultone and NK-COF-41 are subjected to an addition reaction to synthesize a sulfonic-group-rich porous organic framework, then the sulfonic-group-rich porous organic framework is mixed with SPEEK, and the low-sulfonation-degree SPEEK / sulfonic-group-rich porous organic framework composite proton exchange membrane is prepared through a solution casting method. The sulfonic-group-rich porous organic framework obtained by the invention not only has a high specific surface area of 468.6 m < 2 > g <-1 >, but also has a sulfonation degree of nearly 90%, can provide abundant active sites for proton transfer, is stable in structure, hardly swells at 80 DEG C and 100% RH, and can be applied to the field of proton transfer. The prepared composite proton exchange membrane has the characteristics of high proton conductivity, high ion exchange capacity, low swelling rate and the like.

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 high-energy-density fast-charging polymer soft package battery, which comprises a positive electrode, a negative electrode, a diaphragm, an electrolyte and a packaging body, the positive electrode is composed of core-shell composite particles prepared from lithium cobalt oxide and a lithium-rich manganese-based material through a spray drying method, the negative electrode is a lithium titanate coated three-dimensional porous graphene skeleton loaded silicon carbon composite material, and the lithium titanate coated three-dimensional porous graphene skeleton loaded silicon carbon composite material is a lithium titanate coated three-dimensional porous graphene skeleton loaded silicon carbon composite material. The electrolyte comprises lithium bis (trifluoromethylsulfonyl) imide, fluoroethylene carbonate and 1, 3-propane sultone, and the packaging body sequentially comprises a polyether-ether-ketone high-temperature-resistant layer, a nanometer aluminum oxide enhanced aluminum foil and a modified polypropylene heat sealing layer from inside to outside. Through modification of positive and negative electrode materials, optimization of an electrolyte and improvement of a packaging process, the energy density, the fast charging performance, the safety, the cycle life and other aspects are remarkably improved, and the defects of a traditional soft package battery are effectively overcome.

The invention relates to a lithium ion battery and electronic equipment. The lithium ion battery comprises a positive plate and an electrolyte, the positive plate comprises a positive current collector and a positive active material layer arranged on at least one surface of the positive current collector, and the positive active material layer comprises a positive additive; the electrolyte comprises a sulfur-containing additive and 1, 3-propane sultone, (X + Y) / (W * A) > = 0.025; wherein the mass percentage content of the sulfur-containing additive in the electrolyte is X%; the mass percentage content of the 1, 3-propane sultone in the electrolyte is Y%; the mass percentage content of the positive electrode additive in the positive electrode active material layer is W%; the specific surface area of the positive electrode additive is A m < 2 > / g. According to the scheme provided by the invention, the lithium ion battery can present excellent first coulombic efficiency, high-temperature cycle performance, high-temperature storage performance and low-temperature cycle performance.

The invention discloses a preparation method of propargyl alcohol ether sodium propanesulfonate, which comprises the following steps: mixing propargyl alcohol, solid sodium hydroxide and methyl tert-butyl ether in a reaction container connected with a water segregator, carrying out primary heating reaction under a vacuum condition to obtain a sodium propargyl alcohol crude product, continuously dropwise adding 1, 3-propanediol into the reaction container under a normal pressure condition, and carrying out secondary heating reaction under a vacuum condition to obtain a sodium propargyl alcohol ether sodium propanesulfonate product. Adding 1, 3-propane sultone, and carrying out secondary heating reaction to obtain a propargyl alcohol ether sodium propanesulfonate crude product; and adding water to dissolve the propargyl alcohol ether sodium propanesulfonate crude product, layering, dehydrating the obtained water phase, and recrystallizing to obtain the propargyl alcohol ether sodium propanesulfonate. The methyl tert-butyl ether is utilized to carry water in vacuum, the reaction is promoted to proceed forward, the conversion rate of the sodium propargyl alcohol is improved, the reaction temperature is reduced, the yield and quality of the product sodium propargyl alcohol ether propane sulfonate are improved, amplified production is facilitated, the production cost is reduced, and the risk of the reaction process is reduced.

Provided are a secondary battery and an electrical device, relating to the technical field of secondary batteries. The secondary battery comprises a negative electrode sheet and an electrolyte; a negative active material in the negative electrode sheet has a graphitization degree of G; the electrolyte comprises 1,3-propane sultone and fluoroethylene carbonate; and based on the mass of the electrolyte, the mass percentage of 1,3-propane sultone is X%, and the mass percentage of fluoroethylene carbonate is Y%, wherein X>0.2×G+Y and 1.2≤Y≤4.2. The secondary battery can ameliorate the problem of low-temperature lithium precipitation, and the cycle performance of the battery is improved.

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.