120 results about "Methyl carbonate" patented technology

The application belongs to the technical field of regenerated polyester, and particularly relates to a recycling method of waste polyester textiles, which comprises the following steps: decolorizing colored waste polyester textiles by using a decolorizing agent, wherein the decolorizing agent is one or more of dimethyl carbonate, diethyl carbonate and methyl ethyl carbonate; depolymerizing the decolorized polyester textiles by using a depolymerizing agent to obtain terephthalate, wherein the depolymerization rate of the decolorized polyester textiles is 98.0-100%; converting the terephthalate into DMT first, and then performing a re-polymerization reaction on the DMT, ethylene glycol, a catalyst and a functional additive to obtain regenerated PET. The application adopts a process of decolorizing first and then depolymerizing, and the decolorizing and depolymerizing are coordinated, so that the process is simplified, the energy consumption and pollution are reduced, and the economy and sustainability of the recycling of waste polyester textiles are improved.

The invention relates to a preparation method of a lithium difluoro-bis (oxalate) phosphate concentrated solution, the lithium difluoro-bis (oxalate) phosphate concentrated solution is composed of lithium difluoro-bis (oxalate) phosphate and an aprotic solvent, the aprotic solvent comprises any one or a combination of at least two of diethyl carbonate, ethyl methyl carbonate, ethylene carbonate or propylene carbonate, the concentration of the lithium difluoro-bis (oxalate) phosphate in the lithium difluoro-bis (oxalate) phosphate concentrated solution is 10-35 wt%. The lithium difluoro bis (oxalate) phosphate concentrate provided by the invention exists in a non-proton electrolyte state, so that an evaporative crystallization process is omitted, and the production cost is reduced; the product transportation cost can be reduced through pipeline transportation; and compared with a lithium phosphate solid difluoro bis (oxalate), the process of re-dissolution during use is omitted, the risk of impurity introduction is avoided, and the use cost is reduced.

Embodiments described herein relate generally to semi-solid electrodes, and methods of producing the same. In some embodiments, a method of forming a semi-solid electrode can include mixing an active material, a conductive material, and an electrolyte solvent to produce a semi-solid material. The electrolyte solvent is free of electrolyte salt. The method further includes dispensing the semi-solid material onto a current collector and wetting the semi-solid material with an electrolyte solution to form the semi-solid electrode. In some embodiments, the wetting can be via spraying. In some embodiments, the electrolyte salt can have a concentration in the electrolyte solution of at least about 1 M, at least about 2 M, or at least about 3 M. In some embodiments, the solvent can include ethyl methyl carbonate (EMC), ethylene carbonate (EC), propylene carbonate (PC), dimethyl carbonate (DMC), gamma-Butyrolactone (GBL), or any combination thereof.

The invention discloses a PET screen cloth roughing-free treating agent for the shoe making industry and a preparation method thereof, and belongs to the technical field of treating agents. The high-temperature-resistant and corrosion-resistant coating is prepared from the following components in parts by weight: 20 to 25 parts of hydroxyl-terminated polyester resin, 8 to 12 parts of silane modified TPU, 5 to 8 parts of PDMS-g-acrylate, 3 to 5 parts of monoethyl fumarate, 0.05 to 0.16 part of an antioxidant DHOP / 168, 0.2 to 0.5 part of ZrO2-CeO2, 0.04 to 0.06 part of a metal ion passivator, 30 to 40 parts of ethyl acetate / dimethyl carbonate and 0.15 to 0.3 part of TCCA. The treatment agent prepared by the preparation method disclosed by the invention has high peel strength, low yellowing and excellent hydrolysis resistance while realizing no roughing of the PET screen cloth, solves the problem that adhesion and weather resistance of a traditional treatment agent are difficult to consider at the same time, and remarkably improves the efficiency of a shoemaking process and the durability of a product.

This invention relates to a safety control method and system for the preparation of ethyl methyl carbonate (EMC). The method involves feeding dimethyl carbonate into an EMC purification tower, monitoring the pressure within the tower, and adjusting the pressure if it falls outside a preset range. The purity of the output dimethyl carbonate is also monitored. The output dimethyl carbonate, a sodium methoxide / methanol solution, and anhydrous ethanol are mixed in a specified ratio in a raw material mixing unit to achieve the required homogeneity. Pressure and temperature are monitored in an EMC reaction tower; if these requirements are not met, pressure or temperature is adjusted. The bottom liquid from the EMC reaction tower is transferred to a waste catalyst concentration tank for further processing, and then to an EMC light-weight removal tower for further treatment. Temperature and pressure are monitored within the EMC light-weight removal tower; if the pressure falls outside a preset range, pressure or temperature is adjusted. After cooling, the final EMC product is obtained. This process ensures safe and stable production of ethyl methyl carbonate.

The invention discloses an electrolyte for a lithium battery, which comprises an organic solvent, a lithium salt and an additive, and the mass percentage ratio of the organic solvent to the lithium salt to the additive is (70-90): (5-20): (0.2-10); the organic solvent is composed of cyclic carbonate and chain carbonate in a mass ratio of (10-30): (70-90); the lithium salt is one or more of lithium hexafluorophosphate, lithium perchlorate and lithium tetrafluoroborate; the additives comprise a high-temperature stabilizer, an antioxidant and a film-forming accelerant, the cyclic carbonate is one or two of ethylene carbonate and propylene carbonate, and the chain carbonate is one or more of dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate, dipropyl carbonate and methyl propyl carbonate. By optimizing the components of the electrolyte, the stability of the electrolyte at a high temperature is improved, and decomposition and side reactions are reduced, so that the performance of the battery in a high-temperature environment is improved, and the cycle life of the battery in a high-temperature environment is prolonged.

An electrolyte for a battery cell, a battery cell for a vehicle and a method of forming a battery cell. The electrolyte includes a combination of lithium ion salts including lithium hexafluorophosphate (LiPF6), lithium bis(fluorosulfonyl)imide, and lithium difluoro(oxalato)borate. The electrolyte also includes a carbonate solvent including fluoroethylene carbonate, ethyl methyl carbonate, and a carboxylic acid ester exhibiting the following formula:wherein R1 and R2 are individually an unsubstituted alkyl group including in the range of 1 carbon to 2 carbons, wherein the combination of lithium ion salts is dispersed in the carbonate solvent. The electrolyte further includes vinylene carbonate. The electrolyte does not include ethyl carbonate.

A lithium-ion battery with an electrode assembly is shown. The electrode assembly has a current collector and a positive active material layer on the current collector. The electrode assembly also has an electrolyte containing lithium hexafluorophosphate and lithium bis(fluorosulfonyl)imide in a ratio of 0.8 M to 0.2 M and a fluorinated phosphazene additive at 7 wt.% dissolved in a mixed solvent of ethylene carbonate, ethyl methyl carbonate, and sulfolane in a volume ratio of 25 / 73 / 2. The electrolyte permeates a surface of the positive active material layer to suppress electrochemical oxidation of the positive active material layer.

The invention relates to the technical field of batteries, and discloses an electrolyte and application thereof, and a lithium carbon fluoride battery. The electrolyte comprises a lithium salt and an organic solvent; wherein the lithium salt is lithium bis (fluorosulfonyl) imide; the organic solvent is selected from one of ethylene glycol dimethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, ethylene glycol diethyl ether, ethylene carbonate, propylene carbonate, dimethyl carbonate, ethyl methyl carbonate, dimethylformamide, dimethylacetamide and dimethyl sulfoxide. The electrolyte can be applied to preparation of a lithium primary battery. The invention also relates to a lithium carbon fluoride battery comprising the electrolyte. The electrolyte system provides an optimized solution for the preparation of the high-energy-density lithium carbon fluoride battery, has a wide application prospect, can remarkably improve the performance of the battery, reduces the production cost, and promotes the further development of the lithium carbon fluoride battery technology.

The invention relates to the technical field of degradable films, and particularly discloses a long-acting antibacterial degradable film material and a preparation method thereof. The long-acting antibacterial degradable film material is prepared from the following raw materials in parts by weight: 40 to 80 parts of matrix resin, 15 to 35 parts of hydrophobic modified chitosan, 5 to 10 parts of antibacterial agent master batch and 5 to 10 parts of reinforcing agent, the hydrophobic modified chitosan is stearaldehyde grafted chitosan at polylactic acid, and the antibacterial agent master batch is siloxane modified dioctadecyl dimethyl ammonium methyl carbonate at polylactic acid. The material can be well compatible with a hydrophobic polymer matrix, migration and loss of antibacterial components can be inhibited, long-acting stable antibacterial performance is achieved, good mechanical performance and barrier performance are kept, meanwhile, environment degradability of the whole life cycle is ensured, and therefore the urgent requirement of modern green packaging for high-performance, multifunctional and sustainable materials is met.

The application provides a low-temperature electrolyte, a positive electrode slurry and a low-temperature sodium ion battery, and belongs to the technical field of battery materials.The low-temperature electrolyte comprises sodium hexafluorophosphate, propylene carbonate, ethylene carbonate, dimethyl carbonate, methyl ethyl carbonate, fluoroethylene carbonate, 2,2,3,4,4,4-hexafluorobutyl acrylate and 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether.The battery comprises the low-temperature electrolyte.The low-temperature electrolyte and the low-temperature sodium ion battery can not only be compatible with blended positive electrode materials, but also take into account the low-temperature performance, ensure that the prepared low-temperature sodium ion battery has good reaction kinetics and cycle performance, and can also improve the energy density of the electrode and reduce the powder resistivity.

The invention discloses an all-component recovery method and application of a waste lithium ion battery electrolyte, and belongs to the technical field of resource utilization of lithium ion batteries. The method comprises the following steps: disassembling the waste battery in a light mineral oil environment to realize safe and efficient electrolyte collection; then adding a weak base solution into the electrolyte for reaction, selectively precipitating and recovering high-purity lithium salt; and finally, separating and purifying the organic solvent component through two-step reduced pressure distillation to obtain dimethyl carbonate, methyl ethyl carbonate and ethylene carbonate. The method does not need inert gas protection, is simple in process flow, low in cost and high in safety, effectively solves the problems that the electrolyte is easy to volatilize, inflammable and easy to pollute, wastes resources and the like in the traditional recovery process, realizes efficient recovery and high-valued utilization of valuable components in the electrolyte, can be used for preparation of regenerated electrolyte, and is suitable for industrial production. The method has good economic benefits and environmental benefits.

The present invention provides a manufacturing method for a positive electrode for a lithium secondary battery, including: a step of preparing a positive electrode in which a positive electrode active material layer containing lithium iron phosphate is formed on a current collector; and a step of adsorbing an organic solvent into the positive electrode active material layer, the organic solvent including one or more selected from the group consisting of N-methyl-2-pyrrolidone (NMP), acetone, ethanol, propylene carbonate, methyl ethyl carbonate, ethylene carbonate, and dimethyl carbonate.

The invention belongs to the technical field of lithium ion battery electrolyte, and particularly relates to high-voltage electrolyte for a fast-charging lithium ion battery as well as a preparation method and application of the high-voltage electrolyte. Comprising the following substances: a main solvent, which comprises diethyl carbonate (DEC), dimethyl carbonate (DMC) and ethylene carbonate (EC); the diluent is 1, 1, 2, 2-tetrafluoroethyl-2, 2, 3, 3-tetrafluoropropyl ether (HFE), and the diluent is 1, 1, 2, 2-tetrafluoroethyl-2, 2, 3, 3-tetrafluoropropyl ether (HFE); lithium hexafluorophosphate (LiPF6); the film-forming additive is LiDFOB lithium difluoro (oxalato) borate; a film forming additive tri (trimethylsilyl) phosphate TMSP; and lithium nitrate LiNO3. The method provided by the invention is simple and easy to implement and low in cost, and the obtained electrolyte shows excellent specific capacity, charge-discharge cycle stability and rate capability as an electrode material of a lithium ion battery and a sodium ion battery.

The invention discloses a high-voltage sodium ion battery electrolyte for a high-specific-energy O3 type layered oxide positive electrode, and relates to the technical field of sodium ion battery electrolyte preparation. Comprising sodium salt, an organic solvent and an additive, the sodium salt is sodium hexafluorophosphate; the organic solvent is propylene carbonate, diethyl carbonate and ethyl methyl carbonate; the additive comprises a self-cleaning additive and a film-forming additive. The electrolyte is suitable for an O3 type layered oxide positive electrode system with the working voltage as high as 4.2 V. The system has good interface stability, oxidation inhibition capability and whole-process protection mechanism, so that side reaction and gas generation are effectively inhibited, the safety of the sodium ion battery under high voltage is improved, and the cycle life of the sodium ion battery under high voltage is prolonged. And meanwhile, the constructed electrolyte system is reasonable in formula, raw materials are easy to obtain, and good cost control and commercialization amplification prospects are achieved. The problem that an interface of an existing traditional electrolyte is unstable under the high-voltage condition is solved.

Carbonate compounds are excellent additives of oxygen-containing fuel, and play an important role in improving the oxygen content of fuel. The present application mainly relates to a preparation method of a catalyst for synthesizing carbonate additives. The catalyst is used for catalyzing the preparation of a mixture of methyl ethyl carbonate and diethyl carbonate by means of an ester exchange reaction with dimethyl carbonate and ethanol as raw materials. The mixture obtained after the reaction is used as an oxygen-containing fuel additive. The catalyst is characterized in that the catalyst is a high-efficiency ester exchange catalyst with a multistage-pore ZSM-5 molecular sieve as a carrier, a double-molecule as a connecting agent and an alcohol salt as an active component. In the preparation process of the catalyst, the connecting agent is added. The connecting agent has the advantages of increasing the stability of the sodium alcoholate active component and increasing the loading capacity by using a molecular connecting agent with multiple active groups. The performance of the catalyst is evaluated by using a tank reactor, and the stability of the prepared catalyst in the ester exchange reaction is investigated. The performance evaluation shows that the catalyst prepared by using the connecting agent has higher product yield and more excellent product yield. This has important significance for improving the combustion performance of the oxygen-containing fuel and reducing the fuel cost.

In a process according to the invention for producing a lithium-ion battery cell, a cell structure having two complementary electrodes for the lithium-ion battery cell, separated by a separator, is provided and a first electrolyte is introduced at least into the cell structure, the first electrolyte comprising ethyl methyl carbonate (EMC) as solvent and lithium hexafluorophosphate (LiPF6) as conductive salt and being free of ethylene carbonate (EC). The cell structure with the first electrolyte introduced is then subjected to forming and then the cell structure is degassed. Before cycling, a second electrolyte is introduced into the cell structure, the second electrolyte comprising ethylene carbonate (EC) as solvent and lithium hexafluorophosphate (LiPF6) as conductive salt.

This invention discloses a continuous production process for ethyl methyl carbonate (EMC), belonging to the field of organic carbonate synthesis technology. It aims to solve the problems of low conversion rate, poor selectivity, difficulty in catalyst separation and recovery, high energy consumption, and difficulty in stably preparing electronic-grade products in traditional batch processes. This invention uses dimethyl carbonate and ethanol as raw materials, employing a continuous reactive distillation coupled with a multi-stage distillation integrated process. Under the action of a solid base catalyst, a continuous transesterification reaction is achieved, simultaneously completing the discharge of the target product, online catalyst circulation, continuous separation of light and heavy components, and product purification. By precisely controlling the raw material ratio, reaction temperature, pressure, reflux ratio, and residence time, the entire process can operate continuously and stably. This invention features strong process continuity, high ethanol conversion rate, high EMC selectivity and yield, recyclable catalyst, low energy and material consumption, and the obtained product purity can reach electronic grade. It is suitable for the production of lithium-ion battery electrolyte solvents and is easy to scale up industrially and manage continuously.

An electrolyte, a battery cell, and a vehicle with a vehicle battery is provided. The electrolyte includes a ternary salt, dual-cyclic solvents, a linear carbonate solvent, and quaternary additives. The ternary salt includes lithium hexafluorophosphate (LiPF6), lithium bis(fluorosulfonyl)imide (LiFSI), and lithium difluoro(oxalate)borate (LiDFOB). The dual-cyclic solvents include ethylene carbonate (EC) between 0-30% by volume and fluoroethylene carbonate (FEC) between 0-30% by volume. The linear carbonate solvent includes at least one of ethyl methyl carbonate (EMC), dimethyl carbonate (DMC), or diethyl carbonate (DEC). The linear carbonate solvent is between 60-80% by volume. The quaternary additives include vinylene carbonate (VC) between 0.5-2% by weight, trimethylsilyl (TMSi) between 0.25-1% by weight, bis(2,2,2-trifluoroethyl) carbonate (DFDEC) between 0.5-2% by weight, and succinic anhydride (SA) between 0.25-1% by weight.

This invention relates to the field of energy storage electronic components, specifically to a lithium-ion battery. The lithium-ion battery includes a positive electrode, a negative electrode, and a separator. The negative electrode includes a negative electrode current collector and a negative electrode active material layer disposed on the surface of the current collector. The non-aqueous electrolyte includes a lithium salt, an organic solvent, and a first additive. The organic solvent includes dimethyl carbonate and a low-viscosity solvent, wherein the low-viscosity solvent is composed of at least one of methyl acetate, ethyl acetate, and ethyl propionate. The lithium-ion battery satisfies the following conditions: 0.05 ≤ 4, 0.01 ≤ a ≤ 2, 25 ≤ b ≤ 55, 4 ≤ c ≤ 30, 10 ≤ d ≤ 30. The lithium-ion battery of this invention can fully utilize the advantages of carboxylic acid ester solvents in increasing battery power, while greatly suppressing their degradation of high-temperature performance and thermal runaway, achieving a balance between high power performance and high safety performance.

Electrolyte composition for batteries, the electrolyte composition comprising: ethylene carbonate; Diethyl carbonate; Ethyl methyl carbonate; vinylethylene carbonate; vinyl carbonate; Propane-1,3-sultone; ethylene sulfate; and lithium difluorophosphate; and wherein the ethylene carbonate, the diethyl carbonate and the ethyl methyl carbonate are each present in the electrolyte composition in an amount of 10 parts by weight to 50 parts by weight based on 100 parts by weight of the electrolyte composition; wherein the ethylene carbonate, the diethyl carbonate and the ethyl methyl carbonate are present in a ratio of 1:1:1; wherein the vinylethylene carbonate is present in the electrolyte composition at 0.5 parts by weight based on 100 parts by weight of the electrolyte composition; wherein the vinyl carbonate is present in the electrolyte composition at 1.0 part by weight based on 100 parts by weight of the electrolyte composition; and wherein the propane-1,3-sultone is present in the electrolyte composition at 1.5 parts by weight based on 100 parts by weight of the electrolyte composition.

The application belongs to the technical field of new energy batteries, and particularly relates to a lithium ion battery. The lithium ion battery comprises a positive electrode, a negative electrode and a non-aqueous electrolyte; the positive electrode comprises a positive electrode active material comprising a lithium nickel manganese oxide material doped with a phosphorus element and / or coated with a phosphorus-containing compound; the non-aqueous organic solvent in the non-aqueous electrolyte comprises a first solvent and a second solvent; the first solvent comprises at least one of methyl trifluoroethyl carbonate, di(2,2,2-trifluoroethyl) carbonate, 2,2-difluoroethyl acetate and 1,1,2,2-tetrafluoroethyl 2,2,3,3-tetrafluoropropyl ether; the second solvent comprises one or both of dimethyl carbonate and methyl ethyl carbonate; the lithium ion battery satisfies 0.1 <= 100E x (F / L) <= 12, 0.005 <= E <= 0.045, 5 <= F <= 50 and 10 <= L <= 60. The lithium ion battery provided by the application can realize the synergistic optimization of material structure stability and electrolyte performance, and has high conductivity and high oxidation resistance.

This invention proposes a lithium-ion battery electrolyte and its application. The electrolyte comprises at least the following components: a fluorocarbonate solvent, including 2,2,2-trifluoroethyl methyl carbonate and fluoroethylene carbonate; a lithium salt, including a first lithium salt, the first lithium salt including lithium hexafluorophosphate; and an additive, including a first additive, the first additive having the following general structural formula: wherein R1 and R2 are each independently selected from substituents having 1-6 carbon atoms, an unsaturation degree of 0-4, and a heteroatom number of 0-3, wherein the heteroatom is selected from at least one of oxygen, nitrogen, or sulfur. Through the lithium-ion battery electrolyte and its application proposed in this invention, the high-voltage resistance of the electrolyte can be improved, the high-temperature cycle stability of the battery can be significantly enhanced, and the impedance growth and gas generation during high-temperature storage can be suppressed.

The invention discloses a polymer gel electrolyte, a preparation method and application. According to the invention, 1, 3-dioxolame and a hexa-(epoxypropyl) cyclotriphosphazene cross-linking agent are subjected to in-situ polymerization under the initiation of lithium bis (trifluoromethanesulfonimide) and lithium difluoro (oxalato) borate to form a cross-linked polymer network structure, and ethylene carbonate, dimethyl carbonate and ethyoxyl (pentafluoro) cyclotriphosphazene liquid phase components are anchored in the polymer network. The polymer gel electrolyte prepared by the invention not only has the advantage of intrinsic flame retardance, but also has the performance of high ionic conductivity, and the service life of a lithium battery is prolonged.

Provided is a novel secondary battery binder or slurry containing said secondary battery binder, the same being capable of suitably contributing to the manufacturing of a battery and / or to the battery characteristics due to the use of the secondary battery binder in which: an aqueous polymer is contained; the Na concentration of an aqueous solution obtained when the aqueous polymer is dissolved in water at a concentration of 2 mass% is 0.05-0.25 mass%; the electrolyte absorption rate of the aqueous polymer (at 25°C) is 8.0% or less; the composition of the electrolyte is such that the ratio of ethylene carbonate to dimethyl carbonate is 1:1 v / v%; and the pH of the aqueous solution obtained when the aqueous polymer is dissolved in water at a concentration of 2 mass% is, at 25°C, 6.5-8.5.

An electrode is presented. The electrode has a current collector and a positive active material layer deposited on it. The electrode includes an electrolyte. The electrolyte composition includes 1M lithium hexafluorophosphate and 0.5 wt. % vinylene carbonate, dissolved in a solvent mixture of ethylene carbonate and ethyl methyl carbonate in a 25 / 75 volume ratio. This electrolyte permeates the surface of the positive active material layer, effectively suppressing electrochemical oxidation during the electrochemical cycling process, thus increasing the stability and performance of the electrode assembly.

The present invention improves charge / discharge characteristics. This secondary battery comprises a positive electrode, a negative electrode, and an electrolyte solution. The positive electrode is provided with a positive electrode current collector containing aluminum. The electrolyte solution contains an electrolyte and a solvent. The electrolyte contains a bis(fluorosulfonyl) imide salt. The solvent contains at least one compound selected from a first group consisting of ethylene carbonate, propylene carbonate, fluoroethylene carbonate, dimethyl carbonate, and γ-butyrolactone. The intrinsic molar ratio of the solvent to lithium ions, calculated from the vibrational spectrum of the electrolyte, is greater than 0 and not greater than 1.76.

The invention relates to the technical field of organic synthesis, in particular to a method for co-producing methyl ethyl carbonate and diethyl carbonate through homogeneous catalysis, which comprises the following steps: by taking organic sulfonate of 0.5-10% bordering acid metal ions as a catalyst, reacting for 6-9 hours at 73-80 DEG C according to the molar ratio of dimethyl carbonate to ethanol being 1: (5-12); and carrying out atmospheric distillation on the reacted material, and collecting a fraction at 64-130 DEG C to obtain a mixed fraction containing the ethyl methyl carbonate and the diethyl carbonate. According to the technical scheme, the catalyst is superior to an existing catalyst in the aspects of catalytic activity, compatibility and stability, ester exchange can be efficiently catalyzed to co-produce ethyl methyl carbonate and diethyl carbonate, it is ensured that the yield of ethyl methyl carbonate is higher than that of diethyl carbonate, and a series of problems existing in the existing catalyst can be solved.

A lid body includes a terminal member of at least one of a positive electrode and a negative electrode, a sealing plate including an attachment hole for attaching the terminal member, and a sealing material containing a thermoplastic resin and an inorganic filler. The terminal member is inserted into the attachment hole and attached to the sealing plate in a state in which the sealing material is joined to a peripheral portion of the attachment hole. Here, as the inorganic filler, an inorganic substance having a volume change rate of 20% or less after being immersed for 7 days in a test electrolyte, which is prepared at 65° C., and which contains 1200 ppm of water and 1 M of LiPF6, and moreover in which a volume ratio of a solvent thereof satisfies a relationship of ethylene carbonate:diethyl carbonate:dimethyl carbonate=1:1:1, is used.