71 results about "Fluorosulfonate" patented technology

The embodiment of the invention provides an electrolyte, a battery and a power utilization device, the electrolyte comprises a lithium salt, a first additive and a second additive, the lithium salt comprises lithium hexafluorophosphate, the second additive is lithium fluorosulfonate, and the first additive has a structure as shown in a formula (1). The first additive and the second additive have a synergistic effect, an organic-inorganic composite CEI film is formed on the positive electrode, meanwhile, an inorganic SEI film with high ionic conductivity is formed on the negative electrode, and the CEI film and the SEI film can reduce side reactions between the electrode and an electrolyte, so that damage to the surface structure of the electrode and decomposition gas production of the electrolyte are reduced, and the service life of the electrolyte is prolonged. The cycle performance of the battery is improved; and the inorganic SEI film with high ionic conductivity can improve the transmission rate of conductive ions, so that the power performance of the battery is improved, and the battery has relatively good cycle performance and power performance.

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, the electrode assembly comprises a positive pole piece, an isolating membrane and a negative pole piece, the positive pole piece comprises a positive current collector and a positive active material layer arranged on at least one side of the positive current collector, the negative electrode piece comprises a negative electrode current collector and a negative electrode active material layer arranged on at least one side of the negative electrode current collector, the positive electrode active material layer comprises lithium-containing phosphate with an olivine structure, the electrolyte comprises a carboxylic ester solvent, fluorine-containing lithium sulfimide, lithium fluorosulfonate and phosphorus oxyfluoride, the mass content of the carboxylic ester solvent in the electrolyte is 8-30%, and the mass content of the fluorine-containing lithium sulfimide in the electrolyte is 10-30%. The mass content of the fluorine-containing lithium sulfimide in the electrolyte is 3%-8%, the mass content of the lithium fluorosulfonate in the electrolyte is 0.05%-0.5%, and the mass content of the phosphorus oxyfluoride in the electrolyte is 0.05%-0.5%. According to the invention, rapid charging and use reliability of the single battery can be considered.

The invention belongs to the technical field of electrochemical energy storage, and particularly relates to a battery capable of supplementing lithium or sodium in situ, which comprises a positive plate, a negative plate and an electrolyte, and is characterized in that the electrolyte contains a component A, and a positive electrode and / or a negative electrode contains a component B; the structural general formula of the component A is X-Y, and X is lithium fluorosulfonate, sodium fluorosulfonate, lithium difluorophosphate or sodium difluorophosphate; y is boron trifluoride or phosphorus pentafluoride; the component B is at least one of lithium oxalate, sodium oxalate, lithium fluoride and sodium fluoride. Compared with the prior art, the component A and the component B are simultaneously added into the battery disclosed by the invention, so that the battery shows more excellent cycle performance and high-temperature performance. The combination mode has better performance compared with the mode that the component B is independently used in the electrode material or the component A is independently used in the electrolyte.

The invention provides a secondary battery and a power utilization device, in the secondary battery, the CB value of the secondary battery is A, electrolyte contains lithium fluorosulfonate and / or lithium tetrafluoroborate as an additive, the weight of the lithium fluorosulfonate and / or lithium tetrafluoroborate accounts for B% of the total weight of the electrolyte, and the secondary battery meets the following relational expression: A is less than 1.05; and 0.008 < = B / A < = 0.5. The secondary battery provided by the invention has a low CB value, high energy density and excellent high-rate cycle performance.

The invention belongs to the technical field of chemical engineering, and provides a purification method of imidodisulfuryl fluoride, purified imidodisulfuryl fluoride and imidodisulfuryl fluoride salt. The purification method provided by the invention comprises the following steps: reacting to-be-purified imidodisulfuryl fluoride with an impurity removal agent to obtain a mixture; the impurity removing agent comprises resin with nitrogen-containing aromatic ring groups; the bis (fluorosulfonyl) imide to be purified comprises fluorosulfonic acid; and separating the mixture to obtain the purified bis (fluorosulfonyl) imide. The impurity removal agent provided by the invention contains the resin with the nitrogen-containing aromatic ring group, the resin with the nitrogen-containing aromatic ring group can react with the fluorosulfonic acid to finally form the ammonium fluorosulfonate salt, and the fluorosulfonic acid is chemically adsorbed on the resin with the nitrogen-containing aromatic ring group, so that the separation of the fluorosulfonic acid and the bis (fluorosulfonyl) imide is conveniently realized, and the impurity removal efficiency is improved. New anion impurities are not introduced.

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.

An electrolyte solution, an electrochemical device and an electronic device. The electrolyte solution comprises at least two of an additive I, an additive II and an additive III. The additive I is selected from at least one additive in a group consisting of a compound as represented by formula 1a below, a compound as represented by formula 1b, and lithium difluorophosphate; the additive II is selected from at least one additive in a group consisting of lithium fluorosulfonate, bis(fluorosulfonyl)imide, and bis(trifluoromethanesulfonyl)imide; and the additive III is selected from at least one additive in a group consisting of lithium difluoro(oxalato)borate, lithium bis(oxalato)borate and lithium tetrafluoroborate. The electrolyte solution can improve the low-temperature characteristics, impedance and thickness swelling rate of an electrochemical device.

The present application provides an electrolyte, a sodium secondary battery and an electric device. The electrolyte comprises a first additive and a second additive, the first additive comprises a cyclic ester compound containing a sulfur element, and the second additive comprises one or more of fluorosulfonate and difluorophosphate. The combination use of the first additive and the second additive is beneficial to improving the stability of an SEI film, so that the degree of gas production during circulation and storage of the sodium secondary battery is reduced, and the storage performance, the quick charging performance and the storage performance of the sodium secondary battery are 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 provides a preparation method and application of perfluorosulfonate. The structural formula of perfluoroether sulfonate is CF2 = CFOCF2CF2SO3M, and M = Li, Na, K or Ca; the preparation method comprises the following steps: adding alkoxide and a hydrofluoroether solvent into a cyclic compound as shown in a formula I in # imgabs0 # to obtain a reaction solution, and heating the reaction solution to obtain CF2 = CFOCF2CF2SO3M. According to the preparation method of the perfluorosulfonate, provided by the invention, the selectivity of the alkoxide and cyclic combination reaction is improved, so that the generation of byproducts is reduced, and the reaction yield is improved.

The invention discloses a purification method of bis (fluorosulfonyl) imide, which specifically comprises the following steps: mixing a bis (fluorosulfonyl) imide crude product with perfluorosulfonate, and carrying out ion exchange reaction; after the reaction, rectifying and separating to obtain purified bis (fluorosulfonyl) imide; the bis (fluorosulfonyl) imide crude product contains 1 ppm to 30 wt% of fluorosulfonic acid, preferably 10 ppm to 5 wt% of fluorosulfonic acid, and more preferably 0.01 to 1 wt% of fluorosulfonic acid. The method comprises the following steps: adding perfluorosulfonate, carrying out an ion exchange reaction on a difluorosulfonyl imide crude product containing fluorosulfonic acid to obtain a mixture of difluorosulfonyl imide, fluorosulfonate and high-boiling-point perfluorosulfonic acid, and carrying out rectification separation to obtain a difluorosulfonyl imide pure product.

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.

An electrolyte, a sodium secondary battery and an electrical apparatus. The electrolyte comprises a first additive and a second additive, the first additive comprising difluoro(oxalato)borate, and the second additive comprising one or more of fluorosulfonate and difluorophosphate. The combined use of the first additive and the second additive facilitates improving the stability of an SEI membrane, such that the amount of gas produced by the sodium secondary battery during a cycle process and a storage process is reduced, thereby improving the fast charging performance and storage performance of a sodium secondary battery.

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 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 mass content of lithium fluorosulfonate in the electrolyte is 0.05-0.5%; the mass content of the silane-based additive is 0.05%-1%; the mass content of the unsaturated ester additive is 0.05%-3%, the mass content of the carboxylic ester solvent in the electrolyte is 8%-30%, the mass content of the cyclic carbonate solvent is 25%-35%, the linear carbonate solvent comprises dimethyl carbonate, the mass content of the linear carbonate solvent is 18%-45%, the battery monomer comprises a shell, the shell accommodates the electrode assembly and the electrolyte, the shell comprises a shell body and an end cover, and the end cover is arranged in the shell body. The shell comprises an opening, the end cover covers the opening, and the size of the shell in the length direction of the battery monomer is 190-650 mm. According to the invention, rapid charging and use reliability of the single battery can be considered.