6 results about "Propanesultone" patented technology

The application belongs to the technical field of all-vanadium redox flow battery separators, and specifically discloses a sulfonated polyether ether ketone / polyaniline composite membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing polyether ether ketone with concentrated sulfuric acid, heating and reacting in a water bath, and preparing sulfonated polyether ether ketone solids; mixing molybdenum disulfide with toluene, ultrasonicating, adding 1,3-propanesultone, and heating in an oil bath to prepare sulfonated molybdenum disulfide powder; mixing the sulfonated molybdenum disulfide powder, polyaniline and a DMF solution, stirring and ultrasonicating, adding sulfonated polyether ether ketone solids, stirring to obtain casting membrane slurry, coating on a glass plate, drying into a film, sequentially immersing in a sulfuric acid solution and deionized water, and obtaining the sulfonated polyether ether ketone / polyaniline composite membrane. The application discloses a sulfonated polyether ether ketone / polyaniline composite membrane as well as a preparation method and application thereof. The sulfonated polyether ether ketone / polyaniline composite membrane has high proton conductivity, can maintain a low vanadium ion permeability, and improves the electrochemical performance of an all-vanadium redox flow battery.

In order to solve the deficiency of 1,3-propanesultone as an additive, the application provides a lithium battery electrolyte and a lithium battery. The electrolyte comprises an organic solvent, a lithium salt and an additive, and the additive comprises a thiophene compound as shown in general formula (I), wherein R1 is a non-hydrogen group, R2-R3 are H or an organic group, and at least one of R1-R3 is a halogen-substituted or unsubstituted pinacol borate group. The thiophene compound in the electrolyte of the application can replace 1,3-propanesultone, and can participate in the film formation of the positive and negative electrodes, improve the electrode kinetic and thermodynamic properties, reduce the impedance of the interface film, reduce the gas production during battery formation and storage, improve the voltage drop of the battery during full charge storage, and improve the stability of the electrolyte.

Lithium-ion battery, characterized in that the filling coefficient a of the lithium-ion battery satisfies the following condition: 2.2 g / Ah ≤ a ≤ 2.8 g / Ah; the lithium-ion battery comprises an electrolyte, wherein the electrolyte contains a first solvent and an additive; The viscosity η of the first solvent meets the condition: η ≤ 0.6 mPa / s; The additive contains at least one of the following substances: vinylene carbonate, fluoroethylene carbonate, vinylethylene carbonate, ethylene sulfate and 1,3-propanesultone, and the mass fraction m of the additive in the electrolyte meets the condition: 5% ≤ m ≤ 12%.

An electrolyte, a lithium-ion battery, and a vehicle. The electrolyte comprises an organic solvent, a fluorine-containing lithium salt, and a first additive. The organic solvent comprises a carboxylic acid ester and a carbonate ester. The first additive comprises a combination of 1,3-propanesultone and methylene methanedisulfonate. Based on the total mass of the electrolyte being 100%, the content of the carboxylic acid ester is S1, the content of 1,3-propanesultone is W1, and the content of methylene methanedisulfonate is W2; and S1, W1, and W2 satisfy (S1 / 120)<(W1+W2)<(S1 / 20). By means of the synergistic effect of the organic solvent, the fluorine-containing lithium salt, and the additive, low-temperature conductivity is greatly improved, effectively shortening the battery charging time at a low temperature. A prepared lithium-ion battery exhibits both excellent fast-charging performance and low-temperature performance without compromising high-temperature performance.

The present invention aims to solve the above-mentioned problems and to provide a large-capacity cylindrical lithium secondary battery that excels in various performance aspects such as output characteristics, lifespan characteristics, and rapid charging characteristics. [Solution] The present invention relates to a cylindrical lithium secondary battery comprising a jelly-roll type electrode assembly in which a positive electrode plate, a negative electrode plate, and a separator interposed between the positive electrode plate and the negative electrode plate are wound in one direction, a battery can in which the electrode assembly is housed, an electrolyte poured into the battery can, and a seal that seals the open end of the battery can, wherein the electrolyte comprises a lithium salt, an organic solvent, and as additives lithium difluorophosphate, vinylene carbonate, and 1,3-propanesultone, and satisfies the following formula (1). Formula (1): 3.5≦W LiDFP / (W VC +W PS ) × Φ / H × 100 ≤ 20

The invention discloses a demulsifier for crude oil and a preparation method thereof. The demulsifying agent is prepared from the following components in parts by mass: 590 to 610 parts of beet sulfonate alkalized hyperbranched polyether, 180 to 220 parts of aromatic solvent oil and 180 to 220 parts of cosolvent, the sulfonic acid beet alkalized hyperbranched polyether is prepared by taking pentaerythritol as a core and carrying out ring opening polymerization of epoxypropane / ethylene oxide, epoxidation of an epoxy chloropropane end, ring opening of dimethylamine, sequential grafting of 1, 2-epoxybutane / epoxypropane / ethylene oxide and reaction of 1, 3-propane sultone. The demulsifier is suitable for demulsification and dehydration treatment of a high-salinity polymer-containing extracted crude oil system, and high dehydration rate, low dehydrated water turbidity and low dehydrated oil residual water content can be obtained under the condition of low dosage.