48 results about "Fluorosulfonate" patented technology

The invention belongs to the technical field of batteries, and particularly relates to a battery. Compared with the prior art, the lithium fluorosulfonate is added into the electrolyte to promote dissociation and migration of lithium ions, so that the interface impedance of the negative electrode is reduced, meanwhile, by controlling the content of secondary particles in the negative electrode active material and the viscosity of the electrolyte, the side reaction between the negative electrode plate and the electrolyte is reduced, the gas production of the battery is reduced, and the service life of the battery is prolonged. The dynamic performance of the battery is improved.

The present application provides a lithium ion battery, comprising an electrode assembly and an electrolyte comprising a fluorosulfonate and / or difluorophosphate substance. The lithium ion battery has a gas generation area coefficient during formation, defined as α, with α=M×S / 200; wherein M is in the range of 5 mg / cm2-100 mg / cm2; S is the specific surface area of the negative electrode material on the negative electrode current collector and is in the range of 0.1 m2 / g-10 m2 / g; the lithium ion battery has a gas venting path coefficient defined as β, with β=100 / L, wherein L is in the range of L≥50 mm; the mass percentage content w % of the fluorosulfonate and / or difluorophosphate substance in the electrolyte and α and β meet the equation 0.01≤w×β / α≤20.

The present application relates to a battery cell, a battery device and an electrical device. The battery cell includes an electrode assembly and an electrolyte. The electrode assembly includes a positive electrode sheet, a separator and a negative electrode sheet. The positive electrode active material layer includes an olivine-structured lithium-containing phosphate. The single-side coating weight of the positive electrode active material layer is 250 mg / 1540.25 mm 2 Up to 320mg / 1540.25mm 2 The electrolyte includes a carboxylate solvent, with the mass content of the carboxylate solvent in the electrolyte ranging from 8% to 30%. The electrolyte also includes a lithium salt additive, including lithium difluorooxalatoborate and lithium fluorosulfonate, with the mass content of the lithium salt additive in the electrolyte ranging from 0.2% to 1.5%. The electrode assembly has a laminated structure. The thickness of the positive electrode current collector is 10μm to 13μm. This application can balance the energy density, fast charging, and reliability of the battery cell.

This application provides an electrolyte, an electrochemical apparatus, and an electronic apparatus. The electrolyte includes at least two of an additive I, an additive II, or an additive III. The additive I is at least one additive selected from a group consisting of a compound represented by the following formula 1a, a compound represented by the following formula 1b, and lithium difluorophosphate; and The additive II is at least one additive selected from a group consisting of lithium fluorosulfonate, difluorosulfonimide, and bistrifluoromethane sulfonimide. The additive III is at least one additive selected from a group consisting of lithium difluorooxalate borate, lithium bisoxalate borate, and lithium tetrafluoroborate. The electrolyte provided in this application can improve the low-temperature performance and reduce the resistance and thickness swelling rate of electrochemical apparatuses.

The invention provides a modified electrolyte of a rechargeable magnesium battery as well as a preparation method and application of the modified electrolyte. The modified electrolyte comprises a phenoxy magnesium-aluminum halide complex, an organic ether solvent and a lithium salt additive, the lithium salt additive is selected from at least one of lithium fluorosulfonate, lithium trifluoromethanesulfonate, lithium bis (fluorosulfonyl) imide and lithium bis (trifluoromethanesulfonyl) imide. The lithium salt additive does not contain chloride ions, corrosion to a current collector is inhibited, and a solvation structure of magnesium ions in the electrolyte is effectively regulated and controlled, so that the lithium salt additive has a wide electrochemical window, high ionic conductivity, low overpotential and high reversibility. The invention further provides a preparation method of the magnesium battery electrolyte, the preparation process is simple, convenient and efficient, raw materials are low in price, and industrial large-scale production is facilitated.

The invention provides a preparation method of fluorosulfonate, which comprises the following steps: 1) mixing bis (fluorosulfonyl) bisphenol phenyl ester, an organic solvent and alkali metal salt for hydrolysis reaction, and separating reaction liquid to obtain a water phase and an oil phase; 2) concentrating the oil phase obtained in the step 1) to obtain a bisphenol compound; and concentrating the water phase obtained in the step 1) to obtain a solid, and adding a poor solvent into the solid to purify and crystallize to obtain the fluorosulfonate. The method is simple to operate, the obtained bisphenol compound can be recycled, less three wastes are generated, the production cost is low, the yield and purity of a target product are high, and the requirements on production conditions are low, so that large-scale production and application are facilitated.

The invention relates to the technical field of batteries, and discloses a lithium ion battery monomer, a lithium ion battery and a power utilization device. The lithium ion battery monomer comprises an electrolyte and a positive pole piece, the positive pole piece comprises a positive active material, and the positive active material comprises a compound with a molecular formula of LicNixCoyMdNeOfAg; the electrolyte comprises additives, and the additives comprise lithium fluorosulfonate and lithium tetrafluoroborate. According to the present invention, the positive electrode material of the lithium ion battery monomer contains the Co element, and has good positive electrode dynamic performance, the lithium fluorosulfonate and the lithium tetrafluoroborate are further matched to be used as the electrolyte of the additive, and the use amounts of the lithium fluorosulfonate and the lithium tetrafluoroborate are optimized so as to improve the charge-discharge performance of the lithium ion battery at the low temperature.

This application belongs to the field of chemical technology. It provides a method for purifying bis(fluorosulfonyl)imide, as well as the purified bis(fluorosulfonyl)imide and its salt. The purification method includes: reacting the bis(fluorosulfonyl)imide to be purified with a decontaminating agent to obtain a mixture; the decontaminating agent includes a resin with a nitrogen-containing aromatic ring group; the bis(fluorosulfonyl)imide to be purified includes fluorosulfonic acid; and separating the mixture to obtain purified bis(fluorosulfonyl)imide. The decontaminating agent provided in this application contains a resin with a nitrogen-containing aromatic ring group. This resin reacts with fluorosulfonic acid to ultimately form an ammonium fluorosulfonate salt. The fluorosulfonic acid is chemically adsorbed onto the resin with the nitrogen-containing aromatic ring group, thus facilitating the separation of fluorosulfonic acid and bis(fluorosulfonyl)imide without introducing new anionic impurities.

The application provides a lithium ion battery, which comprises an electrode assembly and an electrolyte containing fluorosulfonate and / or difluorophosphate substances. The formation gas production area coefficient of the lithium ion battery is α, α=M×S / 200, M is the loading amount of the negative electrode material on the negative electrode current collector per unit area, M ranges from 5 mg / cm 2 ~100 mg / cm 2 , S is the specific surface area of the negative electrode material on the negative electrode current collector, S ranges from 0.1 m 2 / g to 10 m 2 / g; the exhaust path coefficient of the lithium ion battery is β, β=100 / L, L is the width of the coating area of the negative electrode material on the surface of the negative electrode current collector, L ranges from L≥50 mm; the mass percentage content w% of the fluorosulfonate and / or difluorophosphate substances in the electrolyte and α and β satisfy 0.01≤w×β / α≤20. The lithium ion battery provided by the application can balance high energy density and low formation gas production.

This invention relates to the field of battery technology, and more particularly to a non-aqueous electrolyte, a lithium-ion battery, a battery module, a battery pack, and an electrical device. The non-aqueous electrolyte comprises a lithium salt, a non-aqueous organic solvent, and functional additives. The functional additives include compounds with the structure shown in Formula I and other additives; R1 and R2 are each independently selected from carbonyl, amide, and dimethylacetamide groups; R3, R4, R5, and R6 are each independently selected from hydrogen and fluorine; n is selected from 1 to 3; other additives are selected from one or more combinations of lithium difluorosulfonylimide, lithium trifluoromethanesulfonate, lithium fluorosulfonate, 2-propynyl methanesulfonate, methanedisulfonate methylene, fluoroethylene carbonate, spiroethylene sulfate, vinylene carbonate, and 1,3-propanesulfonate lactone. This invention, through the synergistic effect of compounds with the structure shown in Formula I and other additives, improves the low-temperature performance, rate performance, and cycle performance of lithium batteries.

The present invention relates to a process for producing lithium fluorosulfonate, which comprises a step of reacting a lithium salt and fluorosulfonic acid in a non-aqueous solvent, wherein the lithium salt is a lithium salt which does not produce water as a result of the reaction step.

The invention discloses a synthesis method of 1, 1-diarylethene, which comprises the following steps: by taking aryl fluorosulfonate and sulfonyl hydrazone as raw materials, in the presence of a palladium catalyst, a ligand, alkali and an organic solvent, heating to carry out coupling reaction, and after the reaction is finished, carrying out post-treatment to obtain a 1, 1-diarylethene compound. The method has the advantages that the aryl fluorosulfonate reagent is easy to prepare and store, the reaction selectivity is high, the functional group compatibility is good, the substrate application range is wide and the like, and the yield is as high as 91%. As the 1, 1-diarylethene compound is an important functional molecular skeleton structure, the 1, 1-diarylethene compound has very wide application in the fields of fine chemical engineering and pharmacy; therefore, the method has great application value and social and economic benefits.

The invention discloses a secondary battery and an electric device, and belongs to the technical field of batteries. According to the secondary battery provided by the invention, the positive electrode active material with a proper Dv50 range and the fluorine-containing polymer with a specific swelling ratio range are selected as the positive electrode binder, and the lithium fluorosulfonate is added into the electrolyte, so that the technical characteristics have a mutual synergistic effect, pole piece structure collapse caused by electrolyte permeation can be effectively reduced, and the service life of the secondary battery is prolonged. Side reaction at high temperature and electrolyte decomposition gas production are reduced, and the high-temperature cycle performance of the secondary battery is improved; and meanwhile, the lithium ion diffusion time can be reduced, the contact resistance is reduced, and the rate capability of the secondary battery is improved.

A lithium secondary battery electrolyte solution includes an organic solvent and a first additive, a second additive, and an electrolyte salt that are dissolved in the organic solvent. The organic solvent includes a carboxylate solvent. A mass percent W1 of the carboxylate solvent in the organic solvent is 20% to 80%. The first additive includes one or more of monofluorophosphate, difluorophosphate, tetrafluoroborate, fluorosulfonate, oxalate borate, malonate borate, oxalate phosphate, or malonate phosphate. The second additive includes one or more of vinylene carbonate or a derivative thereof, or ethylene carbonate or a derivative thereof. The mass percent of the first additive and the mass percent of the second additive in the electrolyte solution are W2 or W3 respectively, satisfying: 0.035≤(W2+W3) / W1≤0.15.

The present application relates to a battery cell, a battery device, and an electrical device. The battery cell includes an electrode assembly and an electrolyte. The mass content of lithium fluorosulfonate in the electrolyte is 0.05% to 0.5%; the mass content of a silane-based additive is 0.05% to 1%; the mass content of an unsaturated ester additive is 0.05% to 3%; the mass content of a carboxylic acid ester solvent in the electrolyte is 8% to 30%; the mass content of a cyclic carbonate solvent is 25% to 35%; and the mass content of a linear carbonate solvent, including dimethyl carbonate, is 18% to 45%. The battery cell includes a housing that accommodates the electrode assembly and the electrolyte. The housing includes a shell and an end cap. The shell includes an opening, and the end cap is engaged with the opening. The length of the shell along the length of the battery cell is 190 mm to 650 mm. The present application can take into account both fast charging and reliable use of the battery cell.

The present application relates to a battery cell, a battery device, and an electrical device. The battery cell includes an electrode assembly and an electrolyte. The electrode assembly includes a positive electrode sheet, a separator, and a negative electrode sheet. The positive electrode sheet includes a positive current collector and a positive electrode active material layer disposed on at least one side of the positive current collector. The negative electrode sheet includes a negative current collector and a negative electrode active material layer disposed on at least one side of the negative current collector. The positive electrode active material layer includes a lithium phosphate with an olivine structure. The electrolyte includes a carboxylate solvent, a fluorinated lithium sulfonyl imide, lithium fluorosulfonate, and phosphorus oxyfluoride. The mass content of the carboxylate solvent in the electrolyte is 8% to 30%, the mass content of the fluorinated lithium sulfonyl imide in the electrolyte is 3% to 8%, the mass content of lithium fluorosulfonate in the electrolyte is 0.05% to 0.5%, and the mass content of phosphorus oxyfluoride in the electrolyte is 0.05% to 0.5%. The present application can achieve both fast charging and reliable operation of the battery cell.

The invention belongs to the technical field of photoacid generators, and particularly relates to a fluorine-containing sulfonate photoacid generator and a synthesis method thereof, the fluorine-containing sulfonate photoacid generator has a structural formula shown in the specification, the solubility of the fluorine-containing sulfonate photoacid generator in propylene glycol monomethyl ether acetate is 2.5% (w / w), and the solubility of the fluorine-containing sulfonate photoacid generator in gamma-butyl lactone is 14.0% (w / w). The synthesis method comprises the following steps: firstly, carrying out Friedel-Crafts reaction, carbonyl protection, addition condensation, deprotection, salification and other reactions on anisole and 3, 3-dimethylbutyryl chloride serving as starting materials to obtain a cationic intermediate M3, then carrying out substitution sulfonation, reduction, carbonation and other reactions on ethyl bromofluoroacetate serving as a starting material to obtain an anionic intermediate M6; according to the synthesis method, the yield is high, the purity is 99% or above, the synthesis process is easy and convenient to operate, safe and environmentally friendly, the single-batch mass production reaches the kilogram level, and photoresist supply can be met.

The application discloses an esterification method of aryl fluorosulfonate and aryl formate, and belongs to the technical field of organic compound synthesis. In the method, aryl fluorosulfonate and aryl formate are reacted in a solvent under the action of a catalyst, a ligand and a base in a one-pot method, and corresponding esters with good functional group tolerance can be obtained in a medium to good yield. The preparation method uses aryl fluorosulfonate as a coupling substrate, which is cheap and easy to obtain, and uses aryl formate instead of toxic, flammable and difficult-to-handle CO gas, so that the danger of reagent toxicity and potential explosion in the operation process is avoided. The preparation method has the characteristics of simple reaction condition, convenient post-treatment, green step, low pollution and high economic benefit.

The application provides a lithium ion battery, comprising: an electrode assembly and an electrolyte; the electrode assembly comprises a negative electrode sheet, a separator and a positive electrode sheet, and is wound into a winding structure along a winding direction; the winding structure comprises a circular-arc-shaped bending part, and the circular-arc-shaped bending part at least comprises: a first bending part and a second bending part; a corner lithium precipitation coefficient β of the lithium ion battery satisfies 0.015 ≤ β = R / (R+L) ≤ 0.95, R is the minimum radius of curvature of the convex surface of the negative current collector of the first bending part, L is the shortest distance between the convex surface of the negative current collector of the first bending part and the concave surface of the positive current collector of the second bending part, the electrolyte contains fluorosulfonate and / or difluorophosphate substances, and the mass percentage content w% of the fluorosulfonate and / or difluorophosphate substances in the electrolyte and the corner lithium precipitation coefficient β satisfy 0.01 ≤ w*β ≤ 20. According to the lithium ion battery, high energy density and the problem of negative electrode lithium precipitation under high energy density can be considered.

The invention discloses a secondary battery and a power utilization device, and belongs to the technical field of batteries, the thickness and the ventilation value of a diaphragm, the single-side surface density of a negative electrode active material layer, the viscosity of an electrolyte and the mass percent of lithium fluorosulfonate in the electrolyte are controlled to meet the condition that Y is more than or equal to 0.037 and less than or equal to 3.1; the impedance of the secondary battery is effectively reduced, and the cycle performance of the secondary battery is improved.

The present application relates to the field of lithium ion battery electrolyte additives, and particularly relates to a manufacturing method of lithium fluorosulfonate concentrate, comprising the following steps: (1) reacting chlorosulfonic acid with lithium fluoride in a non-aqueous solvent to generate lithium fluorosulfonate, and hydrogen chloride gas is generated in the reaction; (2) performing vacuum degassing on the reaction solution to remove hydrogen chloride and other gases remaining in the solution, and then filtering to remove the insoluble substances such as lithium fluoride contained therein. The present inventors use chlorosulfonic acid and lithium fluoride to prepare lithium fluorosulfonate, and chlorosulfonic acid belongs to a bulk raw material, which is easy to obtain as a raw material. In addition, there is no other side reaction problem in the reaction process, and the generated product is single. The purity and yield of the obtained product are very high, and it is very suitable for large-scale production in the industry of preparing electrolyte of lithium batteries.

A non-aqueous electrolyte solution comprises additives, wherein the additives comprise a first additive and a second additive, the first additive is any one or more cyclic sulfate compounds having a structure represented by general formula (I), and the second additive comprises one or more of lithium monofluorophosphate, lithium difluorophosphate, lithium tetrafluoroborate, a compound represented by general formula (II), and fluorosulfonates.

The present application discloses an electrolyte solution, a battery and an electrical device. The electrolyte solution includes a first additive, a second additive and a third additive. The first additive includes a sulfate ester compound. The second additive includes:where Z1-Z4 each independently include an oxygen atom or a sulfur atom. The third additive includes at least one of fluorosulfonate, tetrafluoroborate, difluorophosphate, difluoro(oxalato)borate, bis(oxalato)borate and difluorobis(oxalato)phosphate. Based on the total mass of the electrolyte solution, content W1 of the first additive, content W2 of the second additive and content W3 of the third additive satisfy W1:W2:W3=1:(0.1-1.5):(0.02-2.5).

The application discloses a sodium-ion battery electrolyte containing a multi-DTD structure additive, a sodium-ion battery and a preparation method thereof. The electrolyte comprises a composite sodium salt, a non-aqueous solvent and an additive. The composite sodium salt comprises a first sodium salt and a second sodium salt, and the additive comprises a film-forming additive, a sulfur-containing additive and a multi-DTD structure additive. The second sodium salt is sodium fluorosulfonate. In the electrolyte, the content of the first sodium salt is 0.01-15% by mass percentage, the content of the second sodium salt is 0.01-15% by mass percentage, the content of the film-forming additive is 0.01-5% by mass percentage, the content of the sulfur-containing additive is 0.01-5% by mass percentage, the content of the multi-DTD structure additive is 0.01-5% by mass percentage, and the content of the non-aqueous solvent is 40-90% by mass percentage. By introducing the combination system of sodium fluorosulfonate and the multi-DTD structure additive, the electrode interface characteristics are improved, so that the cycle performance, interface stability and temperature adaptability of the sodium-ion battery containing the combination system are improved.

This invention belongs to the field of battery technology, and particularly relates to a battery. Compared with the prior art, the battery provided by this invention reduces the interfacial impedance of the negative electrode by adding lithium fluorosulfonate to the electrolyte to promote the dissociation and migration of lithium ions. At the same time, by controlling the content of secondary particles in the negative electrode active material and the viscosity of the electrolyte, the side reactions between the negative electrode and the electrolyte are reduced, gas production in the battery is reduced, and the kinetic performance of the battery is improved.

The invention provides a preparation method of p-tert-butylphenyl sulfide cyclopentane trifluorosulfonate, and belongs to the technical field of photoacid synthesis. Comprising the following steps: S1, adding 5-bromo-1-pentanol, triethylamine and a first solvent into a reaction container, uniformly stirring, then adding p-tert-butylthiophenol, fully reacting, and spin-drying the solvent to obtain a compound 1; and S2, directly adding a second solvent and triethylamine into the compound 1, fully stirring, adding trifluoromethanesulfonic anhydride at room temperature, fully reacting, and performing post-treatment to obtain a white powdery compound 2, namely p-tert-butylphenyl vulcanized cyclopentane trifluorosulfonate. According to the invention, 5-bromo-1-pentanol and p-tert-butylthiophenol are used as reaction raw materials, a compound 1 is obtained under base catalysis, and then esterification and ring closing are carried out to obtain a target product. The synthesis method provided by the invention is simple to operate, high in reaction yield and high in product purity (the yield is greater than or equal to 80%, and the HPLC purity is gt; 99.1%).

The invention provides a secondary battery and electric equipment. The secondary battery comprises a positive pole piece and an electrolyte, the positive pole piece comprises a positive current collector and a positive active material layer arranged on at least one surface of the positive current collector, the positive active material layer comprises a positive active material, the positive active material comprises lithium iron phosphate, and the lithium iron phosphate comprises secondary particles formed by gathering primary particles. The average particle size of the primary particles is D nm, the specific surface area of the lithium iron phosphate is BET m < 2 > / g, and D / BET is greater than or equal to 2 and less than or equal to 30; the electrolyte comprises an additive and an organic solvent, the additive comprises lithium fluorosulfonate, the mass percentage of the lithium fluorosulfonate in the electrolyte is a%, 0.05 < = a < = 0.5, the organic solvent comprises ethyl propionate, and the mass percentage of the ethyl propionate in the organic solvent is greater than or equal to 30%. The low-temperature discharge performance, the high-temperature storage performance and the high-temperature cycle performance of the secondary battery are improved by matching the proper positive electrode active material and the electrolyte.

A lithium secondary battery and an electrical apparatus. The lithium secondary battery includes a positive electrode plate and an electrolyte solution, where the positive electrode plate includes a positive electrode active material layer containing a positive electrode active material, and the positive electrode active material includes at least one doping element selected from aluminum, zirconium, boron, magnesium, zinc, calcium and titanium; the electrolyte solution includes a silane-based first additive containing C2-C8 alkenyl and a second additive, and the second additive is selected from at least one of lithium fluorosulfonate, lithium bis(fluorosulfonyl)imide and lithium tetrafluoroborate; and the ratio of the mass percentage content W1 of the first additive in the electrolyte solution to the mass percentage content W2 of the second additive in the electrolyte solution to the mass percentage content W3 of the doping element in the positive electrode active material satisfies 1:(0.2-2):(0.1-0.5).

The invention discloses a method for catalyzing cyclization reaction of a 2-biphenyl fluorosulfonate compound and alkyne by palladium, which comprises the following steps: by taking 2-biphenyl fluorosulfonate as a raw material, adding alkyne as shown in a formula (II), a palladium catalyst, a ligand, alkali and a solvent into a reactor to prepare a phenanthrene compound as shown in a formula (III), substituent groups R1 and R2 are respectively and independently selected from hydrogen, chlorine group, fluorine group, methyl group, methoxyl group, trifluoromethyl group, isopropyl group, phenyl group, cyano group, tert-butyl group or naphthyl group; substituent groups R3 and R4 are respectively and independently selected from methyl, ethyl, n-butyl, phenyl, 4-methylphenyl, 4-methoxyphenyl, 4-chlorophenyl or 4-ketophenyl. According to the invention, the simple and easily available 2-biphenyl fluorosulfonate compound is used as a raw material, and the corresponding phenanthrene compound can be obtained at a relatively high yield.

The present invention provides a method for efficiently preparing, in an environmentally friendly manner, high-purity lithium fluorosulfonate from raw materials that are easy to handle without concern for exposure to harmful substances.