34 results about "Fluorosulfonate" patented technology

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.

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 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 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 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 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.

The invention relates to the technical field of batteries, in particular to an electrolyte additive, an electrolyte and a secondary battery. The electrolyte additive disclosed by the invention comprises a fluorosulfonate compound and an ionic liquid, the fluorosulfonate compound has a structural formula shown in (I), and the ionic liquid has a structural formula shown in (II). Wherein R1, R2 and R3 are respectively and independently selected from same or different hydrogen atoms, halogen atoms, cyano groups, substituted or unsubstituted alkyl groups, substituted or unsubstituted alkoxy groups, substituted or unsubstituted unsaturated alkyl groups and substituted or unsubstituted aryl groups; x <-> is selected from any one of fluorine-containing anions. According to the electrolyte additive disclosed by the invention, through mutual cooperation of the fluorosulfonate compound and the ionic liquid in the electrolyte additive, stable operation of the battery in a wide temperature range can be effectively improved, and low-temperature discharge performance and high-temperature cycle performance are both considered.

To provide a nonaqueous electrolyte secondary battery having well-balanced overall performance in terms of durability, capacity, resistance, and output characteristics.SOLUTION: The nonaqueous electrolyte battery includes a positive electrode and a negative electrode capable of storing and releasing metal ions, and a nonaqueous electrolytic solution, wherein the nonaqueous electrolytic solution contains an electrolyte, a nonaqueous solvent, and at least one compound selected from the group consisting of lithium fluorosulfonate, lithium bis (fluorosulfonyl) imide, and lithium difluorophosphate, and the negative electrode contains a negative electrode active material containing Si or a Si metal oxide and graphite particles.SELECTED DRAWING: None

The invention provides a lithium ion battery and a power utilization device. The lithium ion battery at least comprises an electrolyte and a negative plate, the electrolyte comprises a lithium salt and an additive, the lithium salt comprises lithium bis (fluorosulfonyl) imide, and the additive comprises lithium fluorosulfonate; the negative plate comprises a current collector and a negative electrode material layer coated on the surface of at least one side of the current collector; in the lithium ion battery, the lithium bis (fluorosulfonyl) imide, the lithium fluorosulfonate and the negative plate meet the following relation: (b * c) / a is more than or equal to 4 * 10 <-5 > and less than or equal to 0.01554. According to the lithium ion battery provided by the invention, the lithium bis (fluorosulfonyl) imide is added into the electrolyte as a lithium salt, the quick charge capacity of the lithium ion battery is improved through the lithium bis (fluorosulfonyl) imide, and meanwhile, the lithium bis (fluorosulfonyl) imide, the additive lithium fluorosulfonate and the characteristic inorganic SEI component content of the negative plate are cooperatively regulated and controlled, so that the quick charge capacity and the cycling stability of the lithium ion battery are improved at the same time.

The application belongs to the technical field of batteries, and particularly relates to a battery. Compared with the prior art, the battery provided by the application promotes the dissociation and migration of lithium ions by adding lithium fluorosulfonate into electrolyte, thereby reducing the interface impedance of the negative electrode, and reducing the side reaction of the negative plate and the electrolyte by controlling the content of secondary particles in the negative electrode active material and the viscosity of the electrolyte, thereby reducing the gas production of the battery and improving the kinetic performance of the battery.

The application discloses a secondary electrolyte injection method and an alkali metal ion battery thereof, and the secondary electrolyte injection method comprises the following steps: injecting a first electrolyte into a semi-finished product battery cell and sealing, aging, standing and forming, wherein the first electrolyte comprises an electrolyte salt, a non-aqueous solvent and a basic additive; continuously injecting a second electrolyte, and obtaining an alkali metal secondary battery after secondary sealing and capacity distribution; the second electrolyte comprises the first electrolyte, a first additive and a second additive; the first additive is lithium fluorosulfonate or sodium fluorosulfonate, and the second additive is at least one of a fluorine-containing pyridine compound shown in the following formula (I) or a fluorine-containing imidazole compound shown in the following formula (II), and the specific structure is referred to the description. Through the secondary injection of the first additive and the second additive, the high-temperature cycle performance, the high-temperature storage performance and the low-temperature cycle performance of the battery can be improved, the rate discharge performance of the battery is improved, and the power of the battery is improved.

Provided are a battery cell, a battery apparatus, and an electric device. The battery cell comprises: a positive electrode sheet, the positive electrode sheet comprising a positive electrode film layer, and the positive electrode film layer comprising a lithium iron phosphate material and a lithium supplementing agent; a negative electrode sheet, the negative electrode sheet comprising a negative electrode film layer, the negative electrode film layer comprising a negative electrode active material, and the negative electrode active material comprising graphite; a separator, the separator being located between the positive electrode sheet and the negative electrode sheet; and an electrolyte, the electrolyte comprising a lithium salt, the lithium salt comprising an organic lithium salt and an inorganic lithium salt, the organic lithium salt comprising at least one of lithium bis(fluorosulfonyl)imide, lithium difluoro(oxalato)borate, and lithium difluoro(oxalato)phosphate, the inorganic lithium salt comprising at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, and lithium fluorosulfonate, and the mass ratio of the inorganic lithium salt to the organic lithium salt being (6-2):1. Therefore, battery cells having long service life and high power can be obtained.

The present application relates to a kind of fluorosulfonate compounds and its application, sodium-ion battery electrolyte and sodium-ion battery, belong to sodium-ion battery electrolyte technical field.The fluorosulfonate compound of the present application is used as electrolyte additive, can improve the stability of existing sodium-ion battery electrolyte, avoid the decomposition of effective ingredient in electrolyte under high pressure, and then improve the electrochemical performance of battery under high pressure, improve discharge voltage platform, so that the energy density of battery cell increases.Fluorosulfonate compound has excellent antioxidant property, can prevent electrolyte from a large amount of oxidative decomposition on the surface of positive electrode, and then improve the high-pressure stability of electrolyte.

This application provides a non-aqueous electrolyte, a secondary battery, and a power consumption device. The non-aqueous electrolyte includes an additive, the additive includes a first additive and a second additive, the first additive is one or more cyclic sulfate ester compounds having a structure represented by general formula (I), and the second additive includes one or more of lithium monofluorophosphate, lithium difluorophosphate, lithium tetrafluoroborate, a compound represented by general formula (III), and a fluorosulfonate. JPEG2026518244000045.jpg51170

This invention relates to an electrolyte for lithium iron phosphate batteries and a lithium-ion battery, belonging to the field of lithium-ion battery technology. The electrolyte includes lithium salt, a non-aqueous solvent, and additives. The non-aqueous solvent is characterized by comprising one or more asymmetric fluorosulfonate compounds; the additives are carbonate additives and / or nitrile additives. This invention addresses the capacity decay problem caused by manganese leaching at high temperatures in lithium iron phosphate batteries by using LiFSI to prevent HF generation at the source, thus inhibiting manganese leaching. Simultaneously, a fluorosulfonate is introduced as a co-solvent. On the one hand, it decomposes at the positive electrode to form a protective film rich in sulfur components, effectively inhibiting the corrosion of aluminum foil by LiFSI. On the other hand, the fluorosulfonate can participate in the regulation of lithium-ion solvation structure and synergistically construct a stable positive and negative electrode interface film, significantly improving the battery's high-temperature cycle stability and high-temperature storage performance.

A non-aqueous liquid electrolyte secondary battery including a positive electrode, a negative electrode, and a non-aqueous electrolyte, in which the positive electrode includes a positive electrode active material, and a carbon nanotube, the positive electrode active material includes a lithium-transition metal composite oxide containing Ni, a proportion of Ni in metal elements other than Li in the lithium-transition metal composite oxide is 80 atm % or more, and the non-aqueous electrolyte includes a fluorosulfonic acid salt.

The invention provides a secondary battery and electric equipment. The secondary battery comprises a negative electrode plate and an electrolyte, the negative electrode plate comprises a negative electrode current collector and a negative electrode active material layer arranged on at least one surface of the negative electrode current collector, the negative electrode active material layer comprises a negative electrode active material, the negative electrode active material comprises artificial graphite, and the negative electrode active material comprises an electrolyte. The ratio of Dv50 to Dn50 of the artificial graphite is a, and a is greater than or equal to 1 and less than or equal to 4; the electrolyte comprises an additive, the additive comprises lithium fluorosulfonate, the mass percentage content of the lithium fluorosulfonate in the electrolyte is b%, and b is larger than or equal to 0.05 and smaller than or equal to 0.5. The ratio of the artificial graphite Dv50 to the artificial graphite Dn50 and the content of lithium fluorosulfonate in the electrolyte are controlled to be within a certain range, and the artificial graphite Dv50 and the artificial graphite Dn50 have a synergistic effect, so that the low-temperature discharge performance, the high-temperature storage performance and the high-temperature cycle performance of the secondary battery are improved.