8 results about "Difluoride" patented technology

This application relates to the field of synthesis technology of lithium-ion battery electrolyte additives, specifically to a synthesis process of 1,3-propanedisulfonyl fluoride. The synthesis process includes the following steps: S1. Adding 1,3-propanedisulfonyl chloride and potassium fluoride to a reaction vessel; S2. Adding distilled water as a reaction solvent to the reaction vessel and refluxing under stirring; S3. After the reaction solution has settled and separated into layers, separating and collecting the oil phase, adding toluene and activated carbon to the oil phase, and refluxing for decolorization; S4. Performing a first crystallization treatment on the decolorized solution, followed by filtration, and washing the filter cake obtained from the filtration; S5. Collecting the filtrate obtained after the first washing and performing a second crystallization treatment, followed by filtration again; S6. Vacuum drying the filter cake obtained in steps S4 and S5 to obtain 1,3-propanedisulfonyl fluoride. This application features mild reaction conditions, simple operation, low cost, and environmental friendliness.

The present invention relates to a binder solution for a secondary battery, comprising at least one non-aqueous solvent and at least one fluoropolymer comprising recurring units derived from a) vinylidene difluorides and b) at least one fluorinated olefin monomer containing at least one —SO2X functional group, X being selected from X′ and OM, X′ being selected from the consisting of F, Cl, Br, and I; and M being selected from the group consisting of H, an alkaline metal and NH4, wherein b) the fluorinated olefin monomer is present in an amount from 0.1 to 10.0 mol %, the mol % being relative to the total moles of recurring units; to a solid composite electrolyte comprising at least one fluoropolymer according to the present invention and at least one sulfide-based solid ionic conducting inorganic particle; to a slurry for manufacturing a solid composite electrolyte comprising a binder solution according to the present invention and at least one sulfide-based solid ionic conducting inorganic particle, optionally further comprising at least one electroactive material and / or at least one conductive agent; and to an electrode comprising at least one fluoropolymer according to the present invention and at least one electroactive material, optionally further comprising at least one conductive agent and / or at least one sulfide-based solid ionic conducting inorganic particle. The present invention also relates to a secondary battery comprising a positive electrode, a negative electrode, and a membrane that is positioned between the positive electrode and the negative electrode, wherein at least one of the positive electrode, the negative electrode and the membrane comprises at least one fluoropolymer according to the present invention, optionally further comprising at least one sulfide-based solid ionic conducting inorganic particle, at least one electroactive material and / or at least one conductive agent.

A solution comprises a solvent, a fluorinated polymer and an alkali or alkaline earth metal salt wherein the fluorinated polymer is a partially unsaturated poly(alkylene) polymer. Preferably, the fluorinated polymer is a co-polymer comprising first alkylene repeat units and second alkylene repeat units, wherein at least some of the first alkylene repeat units are unsaturated and the second alkylene repeat units are saturated. Preferably, the first alkylene repeat units are vinylene difluoride repeat units, at least some of which are dehydrofluorinated, and the second alkylene repeat units are saturated hexafluoropropene repeat units. The metal salt is preferably a Li salt, such as LiPF6, LiBF4, LiClO4, LiBOB, LiTFSI or Li(M(OR)4), where M is Al or B. The solvent may be selected from alkylene carbonates (e.g. propylene carbonate), dialkyl carbonates (e.g. DMC) or ethers (e.g. DME). A method of forming a gel electrolyte comprises deposition of this solution and evaporation of the solvent. This can be used to form a battery with a gel layer disposed between first and second current collectors.

The present disclosure provides a dry cathode composite comprising: 95.6 to 97% by weight of an active material; 1.2 to 1.5% by weight of a first conductive carbon having a surface area in a range of 250 m2 / g to 1800 m2 / g; 0.35 to 0.5% by weight of a second conductive carbon having a surface area in a range of 10 m2 / g to 50 m2 / g; 0.8 to 1.2% by weight of a fibrillating binder; and 0.7 to 1.2% by weight of an adhesive binder selected from polyvinylidene fluoride (PVDF), polyvinylidene fluoride-co-hexafluoropropylene (PVDF-HFP), polyethylene oxide, vinylidene fluoride, polyacrylic acid (PAA), high molecular weight polyethylene (HMWPE), polyvinylidene fluoride-vinylidene difluoride copolymers (PVDF-VF2), or combinations thereof. The present disclosure also provides a process for preparation of the dry cathode composite and a cathode comprising the dry cathode composite as disclosed herein.

The present invention relates to a solid composite electrolyte comprising a) at least one fluoropolymer and b) at least one sulfide-based solid ionic conducting inorganic particle, wherein a) the fluoropolymer comprises recurring units derived from i) at least 50.0 mol % of vinylidene difluorides, the mol % being relative to the total moles of recurring units; ii) at least one C2-C8 chloro and / or bromo and / or iodo fluoroolefin; and iii) at least one C2-C8 fluoroolefin, wherein i), ii) and iii) are different from each other; to a slurry for manufacturing a solid composite electrolyte comprising a) at least one fluoropolymer according to the present invention and b) a sulfide-based solid ionic conducting inorganic particle, and c) at least one non-aqueous solvent; to an electrode comprising a solid composite electrolyte according to the present invention, d) at least one electroactive material, and optionally e) at least one conductive agent; and to a solid state battery comprising a positive electrode, a negative electrode and a membrane, at least one among which comprises a solid composite electrolyte according to the present invention. The present invention also relates to a binder solution for a solid state battery comprising a) at least one fluoropolymer according to the present invention and c) at least one non-aqueous solvent.

Provided is a novel method for producing a fluorinated organic compound that facilitates removal or separation of an auxiliary agent and that is advantageous in terms of production costs. The production method is a method for producing a difluoride which is a compound represented by formula (1) (in the formula, R1, R2, and n have the same definitions as the symbols described in the specification). The method involves a step for reacting the compound represented by formula (1) with (A) at least one fluorine source selected from hydrogen fluoride, hydrogen fluoride salts, and fluoride salts, (B) at least one iodine source selected from iodine and ammonium iodide, and (C) a compound having at least one fluorinated quaternary nitrogen atom in the molecule to difluorinate the compound represented by formula (1), wherein the amount of the iodine source (B) used is less than 1.0 mol with respect to 1 mol of the compound represented by formula (1).

The application discloses a synthesis method of a functionalized carbon glycoside, and belongs to the technical field of organic synthesis. The application takes a coupling reagent (aryl bromide, alkenyl bromide, alkenyl geminal difluoride, alkynyl bromide, electron-deficient olefin) and a glycoside as substrates, is catalyzed by a photocatalyst, or is cooperatively catalyzed by a photocatalyst and a metal catalyst, and is completely reacted under the irradiation of purple light to obtain a functionalized (arylated, alkenylated, alkenyl monofluorinated, alkynylated and alkylated) carbon glycoside. The application realizes the stereoselective functionalization reaction of a C(sp 3 )‑H bond of the glycoside by using the strategy of photocatalysis or light-metal cooperative catalysis, the method has the advantages of mild conditions, wide substrate adaptability, low cost, high atom utilization rate and economic steps, and the synthesized functionalized carbon glycoside can realize the synthesis of various natural products and commercially available drugs through subsequent conversion, and has great synthetic value.

The present invention relates to a method for the extraction of vinylidene difluoride (VDF) polymers from a solid composition the method comprising: i) providing a solid composition comprising one or more VDF polymer ii) contacting said solid composition comprising one or more VDF polymer with a supercritical fluid in the presence of one or more polar aprotic co-solvent within a pressurized vessel at a pressure P above 120bar, preferably between 150 and 1500bar thereby dissolving said one or more VDF polymer and forming a VDF polymer solution and an extracted solid residue. The method can be used as a part of a recycling process for spent secondary batteries.