153 results about "Dimethoxyethane" patented technology

The invention provides a gel-state polymer electrolyte as well as a preparation method and application thereof, and belongs to the field of batteries. The gel-state polymer electrolyte provided by the invention comprises the following preparation raw materials: a polar organic solvent, a lithium salt, a lithium salt additive, a liquid flame retardant, a liquid monomer and an initiator, the polar organic solvent comprises 1, 3-dioxolame and ethylene glycol dimethyl ether; the dosage ratio of the lithium salt to the polar organic solvent is 1 mmol: (0.5-2) mL; the mass of the lithium salt additive is 1.5-5% of the total mass of the lithium salt and the polar organic solvent; the volume of the liquid flame retardant is 10-20% of the volume of the polar organic solvent; the volume of the liquid monomer is 10-20% of the volume of the polar organic solvent; the mass of the initiator is 0.5-2% of the total mass of the lithium salt, the polar organic solvent and the monomer. And Li < + > in the lithium salt is released after the type of the solvent is adjusted, so that the Li < + > transference number and the ionic conductivity are improved.

The invention belongs to the technical field of organic synthesis of ethers, and particularly relates to a method for continuously synthesizing ethylene glycol dimethyl ether. The method comprises the following steps that ethylene glycol, sodium hydroxide and methane chloride serve as raw materials, multi-stage continuous reaction is carried out in liquid membrane reactors to synthesize ethylene glycol dimethyl ether, ethylene glycol, sodium hydroxide and methane chloride are introduced into the first-stage liquid membrane reactor, sodium hydroxide and methane chloride are introduced into the subsequent stages of liquid membrane reactors, and the first-stage liquid membrane reactor and the second-stage liquid membrane reactor are connected with the second-stage liquid membrane reactor. A byproduct sodium chloride is separated from a reaction product in the previous-stage liquid membrane reactor and then enters the next-stage liquid membrane reactor, a byproduct sodium chloride is separated from a reaction product in the last-stage liquid membrane reactor and then clear liquid is obtained, and ethylene glycol dimethyl ether is obtained through rectification treatment. The invention develops a novel process mode for continuously synthesizing an ethylene glycol dimethyl ether product, and provides a new idea for large-scale continuous production of ethylene glycol dimethyl ether.

Described herein are lithium-metal rechargeable electrochemical cells comprising a lithium-metal negative electrode, a positive electrode, and a liquid electrolyte. The liquid electrolyte comprises a core mixture and a diluent. The diluent comprises a fluorinated ether. The core mixture comprises a set of salts and a set of solvents. The set of solvents comprises a pyrrolidinium-containing ionic liquid and a molecular solvent. The molecular solvent is a non-fluorinated ether, for example including but not limited to 1,2-dimethoxyethane. In some examples, the electrolyte further comprises an electrolyte additive, for example including but not limited to tris(trimethylsilyl)phosphate. In some examples, the set of salts comprises one or more imide-containing lithium salts. In some examples, the set of salts comprises lithium bis(fluorosulfonyl)imide and an additional salt and the mole fraction of lithium bis(fluorosulfonyl)imide in the set of salts is 0.5 or greater.

The present invention belongs to the technical field of fabric color fixing agents and provides a novel acidic color fixing agent free of bisphenol S and a preparation method thereof; the acidic color fixing agent is composed of the following components in parts by weight: 15-25 parts of water, 10-15 parts of phenol, 15-25 parts of dimethylacetamide, 2-5 parts of sodium sulfite, 10-15 parts of acetic acid, 5-7 parts of concentrated sulfuric acid, 15-20 parts of acrylic acid, 2-5 parts of ethylene glycol dimethyl ether, and 1-3 parts of sorbitol; the preparation method comprises the following steps: mixing a formula amount of phenol, dimethylacetamide, acrylic acid, acetic acid, and sodium sulfite, heating, adding concentrated sulfuric acid to react, cooling, adding a formula amount of water, and adding a formula amount of ethylene glycol dimethyl ether and sorbitol to obtain the product. Compared with the prior art, the present invention does not contain bisphenol S, has a good color fixing effect, can effectively improve various fastnesses such as water fastness, perspiration fastness, and seawater resistance, has little effect on the color change of the fabric after treatment, and has good tolerance to hardness ions.

The invention discloses a wide-voltage wide-temperature-range sodium-ion battery electrolyte and a preparation method and application thereof, and belongs to the technical field of sodium-ion battery electrolytes.The wide-voltage wide-temperature-range sodium-ion battery electrolyte comprises sodium salt, an organic solvent and an additive, the organic solvent is selected from one or more of ethylene carbonate, propylene carbonate, ethyl methyl carbonate, dimethyl carbonate, diethyl carbonate, ethylene glycol dimethyl ether, diethylene glycol dimethyl ether and triethylene glycol dimethyl ether, and the additive is selected from one or more of fluoroethylene carbonate, allyl-1, 3-propane sultone, 1, 3-propylene sultone, 1, 3-propylene sultone and 1, 3-propylene sultone. The additive is one or more of 1, 3-propyl sultone, methylene methane disulfonate, ethylene sulfate, trifluoromethanesulfonic anhydride, pentaerythritol bicyclic sulfate, tri (trimethylsilane) phosphate, tri (trimethylsilane) phosphite, tri (trimethylsilane) borate, acesulfame sodium and aluminum trifluoromethanesulfonate, and the additive is one or more of 2, 3-propylene sultone, methylene methane disulfonate, ethylene sulfate, trifluoromethanesulfonic anhydride, pentaerythritol dicyclosulfate, tri (trimethylsilane) phosphate, tri (trimethylsilane) phosphite, tri (trimethylsilane) borate, tri (trimethylsilane) phosphate and tri (trimethylsilane) borate. The electrolyte provided by the invention not only keeps high coulombic efficiency at low temperature, but also has good cycle stability at high temperature.

In one example of a method for improving the performance of a silicon-based negative electrode, the silicon-based negative electrode is pre-lithiated in an electrolyte containing a lithium salt dissolved in a solvent mixture of dimethoxyethane (DME) and fluoroethylene carbonate (FEC). DME and FEC are present in a volume-to-volume ratio of 10:1 to 1:10. The pre-lithiation forms a solid electrolyte intermediate phase on an exposed surface of the negative electrode.

An electrolytic solution for a lithium metal battery, including an electrolyte salt and an organic solvent, the electrolyte salt including lithium bis-fluorosulfonylimide (LiFSI); the organic solvent including 1,2-dimethoxyethane (DME) and 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether (TTE); the electrolytic solution further including a first compound that is a polyethylene glycol compound having an average molecular weight of 200 to 1200 and that is included in the electrolytic solution for a lithium metal battery at 0.015% by mass or more and less than 0.3% by mass, and a second compound that is at least one selected from the group consisting of diglyme, triglyme, and tetraglyme and that is included in the electrolytic solution for a lithium metal battery at 0.1% by mass or more and less than 1.0% by mass.

The invention discloses an aluminum alloy complex cavity diffusion welding method, which is characterized in that a uniform and compact organic molecule adsorption protection layer is formed on the surface of aluminum by completely immersing a cleaned blank in a diethylene glycol dimethyl ether solution for ultrasonic-assisted treatment. The protective film can effectively isolate air at normal temperature and prevent the oxidation film from regenerating; and in the initial stage of diffusion welding temperature rise, the aluminum alloy can be completely decomposed and volatilized, no impurity is left, and the high-activity clean aluminum surface is exposed. According to the method, diffusion welding is carried out under the conditions that the vacuum degree is high, the temperature is 500-560 DEG C and the pressure is 5-15 MPa in cooperation with a positioning tool system matched with the thermal expansion coefficient, aluminum atoms are fully diffused under the condition that no oxidation film hinders exist, and high-quality metallurgical bonding is formed. By means of the technical scheme, the problem that the welding rate is low due to an oxidation film on the surface of the aluminum alloy is successfully solved, meanwhile, the defects of ultrahigh vacuum equipment input and middle layer material introduction are overcome, and the manufacturing quality and production efficiency of complex aluminum alloy components are greatly improved.

The invention belongs to the technical field of organic synthesis. The invention particularly relates to a synthesis method of chiral beta-diaryl ethanol. The physiological activity, the pharmacological action and the material performance of the chiral molecule are directly determined by the spatial configuration of the chiral molecule. Therefore, efficient construction of chiral compounds is always the core research direction of organic synthesis and medicinal chemistry. Wherein the chiral beta-diaryl ethanol is a kind of key intermediates with irreplaceable application value. According to the invention, the Suzuki-Miyaura type asymmetric ring-opening coupling reaction of nickel catalyzed aryl epoxy and aryl boric acid with high stereoselectivity is realized, and the asymmetric ring-opening coupling reaction is used for synthesizing chiral beta-diaryl alcohol compounds. The method is wide in substrate compatibility and raw material source, mild in reaction condition, free of exogenous alkali and convenient to operate. An aryl epoxy compound and arylboronic acid are used as raw materials, diethylene glycol dimethyl ether nickel bromide is used as a catalyst, chiral biimidazoline is used as a ligand, under the promotion of sodium iodide, reaction is performed in an ethanol solvent according to the following reaction formula at the temperature of 50 DEG C for 10 hours, and the chiral beta-diaryl ethanol compound with the high ee value is obtained.

This invention relates to the field of electrochromic thin film technology, and more particularly to a dithiophene derivative, its preparation method, and its application, as well as an electrochromic thin film and its preparation method. This invention involves reacting dithiophene with tributyltin chloride to generate tin-modified dithiophene, reacting dithiophene with isopropanol pinacol boronic acid ester to generate boron-modified dithiophene, and then reacting the tin-modified or boron-modified dithiophene with 1,4-diiodo-2,5-bis-(6-hexynyl)-benzene to generate 1,4-dithiophene-2,5-bis-(6-hexynyl)-benzene. This product is then reacted with dimethylboron hydride generated from lithium aluminum hydride and dimethoxyethane to finally obtain the dithiophene derivative. This derivative can be applied in electrochromic thin films. This invention successfully prepares an electrochromic thin film with fast response and fluoride ion detection capability by electrochemically polymerizing the dithiophene derivative.

The application discloses a developing etching process for producing a PCB (Printed Circuit Board), and belongs to the field of PCB processing, which comprises the following steps: S1, using a pre-etching agent to pre-etch the PCB; S2, using an etching-resistant agent to etching-resistantly treat the line sidewall of the PCB after pre-etching; S3, using a main etching agent to etch the PCB after pre-etching after etching-resistant treatment; the pre-etching agent comprises the following components in parts by weight: 30-40 parts of citric acid, 5-8 parts of EDTA, 3-5 parts of a non-ionic or anionic surfactant, and 1-3 parts of a coupling agent; the main etching agent comprises the following components in parts by weight: 40-50 parts of ferric chloride, 10-15 parts of maleic acid, 10-15 parts of an amino acid, 3-5 parts of hydrogen peroxide, 1-3 parts of a pH regulator, and 1-2 parts of a rare earth oxide; the etching-resistant agent is a resin containing a double bond and ethylene glycol dimethyl ether, and the mass ratio of ethylene glycol dimethyl ether to the resin containing a double bond is 1:10. The application can guarantee high-quality etching effect and solve the problem of etching measurement.

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 present application relates to an electrolyte composition for a lithium secondary battery and a lithium secondary battery comprising the same, the electrolyte composition comprising a lithium salt and an organic solvent. The organic solvent includes a first ether solvent (R-O-R ') having a fluorinated alkyl group, and a second ether solvent. The first ether solvent may be 5-ethoxy-1, 1, 2, 2, 3, 3, 4, 4-octafluoropentane, 1, 1, 2, 2, 3, 3, 4, 4-octafluoro-5-methoxypentane, or a mixture thereof, and the second ether solvent may be selected from the group consisting of dimethoxyethane, diethyl ether, and similar ethers. The lithium salt includes a compound such as LiTFSI, LiFSI, or LiPF6. The first ether solvent accounts for 30% to 90% by volume of the electrolyte, wherein the concentration of the lithium salt ranges from 0.1 M to 3.0 M. The electrolyte composition enhances battery stability and makes it suitable for use in lithium secondary batteries and lithium metal secondary batteries.

The problem to be solved by the present invention is to provide an electrolyte solution for a lithium metal battery, which can easily improve the durability of the lithium metal battery and can suppress an increase in battery resistance. In order to solve the problem, the present invention provides an electrolyte solution for a lithium metal battery, in which an electrolyte salt contains lithium bis-fluorosulfonyl imide (LiFSI), an organic solvent contains 1, 2-dimethoxyethane (DME), and 1, 1, 2, 2-tetrafluoroethyl-2, 2, 3, 3-tetrafluoropropyl ether (TTE), the electrolyte solution for a lithium metal battery further comprises: a polyethylene glycol compound having an average molecular weight of 200-1200, wherein the electrolyte solution for a lithium metal battery contains 0.015% by mass or more and less than 0.3% by mass of a first compound; and at least one compound selected from the group consisting of diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, and tetraethylene glycol dimethyl ether. The electrolyte solution for a lithium metal battery contains 0.1% by mass or more and less than 1.0% by mass of a second compound.

In order to solve the problems that the high-temperature cycle life and the low-temperature cycle life of the battery are short due to the fact that an electrolyte used by an existing lithium metal battery contains a strong-strong solvent pair or a strong-anti-solvent pair in LHCE, the invention provides a high and low temperature resistant electrolyte and a lithium metal battery. The high and low temperature resistant electrolyte comprises an organic solvent, the organic solvent comprises a strong solvating solvent and a weak solvating solvent, the weak solvating solvent is 4-methyl-1, 3-dioxane, and the strong solvating solvent is ethylene glycol dimethyl ether. At low temperature, due to the dipole interaction of MeDX-DME, a layered solvation structure is formed, and the interaction of Li < + >-DME is weakened, so that the Li < + > desolvation energy is reduced, the Li < + > transmission kinetics is increased, and the low-temperature cycle life of the battery is prolonged; and at high temperature, due to the dipole interaction of MeDX-DME, a layered solvation structure is formed, so that the ring-opening reaction of MeDX is slowed down, the generation of side reactions is reduced, the high-temperature stability of the electrolyte is improved, and the high-temperature cycle life of the battery is prolonged.

This invention relates to the field of organic synthesis technology, specifically to a highly efficient and stable Grignard preparation and its green preparation method. By weight, it comprises 8-18 parts of a magnesium source, 40-92 parts of a halogenated hydrocarbon, 150-200 parts of a green solvent, 15-20 parts of ethylene glycol dimethyl ether, and 2.3-3.2 parts of a synergistic stabilizer. The green solvent is 2-methyltetrahydrofuran, or a composite solvent with a weight ratio of 2-methyltetrahydrofuran:methyl tert-butyl ether of 150-160:40-50. The synergistic stabilizer is composed of 1.5-2.0 parts of N,N,N',N'-tetramethylethylenediamine and 0.8-1.2 parts of butylated hydroxytoluene, or composed of 1.5-2.0 parts of N,N,N',N'-tetramethylethylenediamine and 1.0 part of phenothiazine. This invention uses a green solvent system to replace traditional toxic and harmful solvents, and combines it with a solvent recovery process to achieve solvent recycling, which greatly reduces waste emissions and makes the production process safer and more environmentally friendly, in line with the development direction of green chemical industry.

The invention relates to a novel lithium metal battery ether electrolyte and a preparation method thereof, the electrolyte comprises the following components: a non-aqueous organic solvent system, a lithium salt and an additive, the non-aqueous organic solvent system is preferably selected from ethylene glycol dimethyl ether and 1, 1, 2, 2-tetrafluoroethyl-2, 2, 3, 3-tetrafluoropropyl ether; the additive is preferably selected from lithium nitrate, lithium difluoro (oxalato) borate, tris (pentafluorophenyl) borane and pentafluorophenoxy cyclotriphosphazene; the lithium salt comprises at least one of lithium bis (fluorosulfonyl) imide, lithium bis (trifluoromethylsulfonyl) imide, lithium difluoro (oxalato) borate, lithium hexafluorophosphate and lithium tetrafluoroborate; the invention also provides a preparation method of the electrolyte and a battery formed by the electrolyte. The electrolyte provided by the invention realizes low impedance, high conductivity and long cycle life while maintaining high energy density, and provides an effective solution for safe and reliable operation of a metal lithium battery under harsh working conditions of high surface capacity, high current density and the like.

The application relates to the technical field of batteries, in particular to an electrolyte suitable for primary lithium-manganese batteries and a preparation method thereof. The electrolyte comprises propylene carbonate, ethylene carbonate, lithium bisfluorosulfonylimide, lithium perchlorate, lithium bisoxalate borate, terminal bisdifluorophosphorylated oligomeric trimethylene carbonate, ethylene glycol dimethyl ether, lithium difluorooxalate borate and 1,3-propane sultone. The electrolyte is prepared through a pre-coordination and segmented dilution process with specific timing. The electrolyte system can synergistically optimize the electrode interface film forming process, has high discharge capacity retention rate and low direct current resistance at low temperature (-20 DEG C), and has high capacity retention rate after high-temperature storage (60 DEG C), thereby significantly improving the comprehensive performance of the primary lithium-manganese battery in a wide temperature range.

The invention discloses a linear ether and cyclic ether mixed electrolyte for a wide-temperature-range sodium-ion battery as well as a preparation method and application of the linear ether and cyclic ether mixed electrolyte, and relates to a wide-temperature-range electrolyte as well as a preparation method and application of the wide-temperature-range electrolyte. The invention discloses a linear ether and cyclic ether mixed electrolyte for a wide-temperature-range sodium-ion battery. The linear ether and cyclic ether mixed electrolyte comprises sodium salt and an ether-based solvent, the sodium salt is sodium trifluoromethanesulfonate; the ether-based solvent is a mixed solution of straight-chain ether and cyclic ether; the straight-chain ether is diethylene glycol dimethyl ether; the cyclic ether is tetrahydrofuran or dimethyl tetrahydrofuran. The straight-chain ether and cyclic ether mixed electrolyte of the wide-temperature-range sodium-ion battery provided by the invention has a low freezing point, low viscosity, high ionic conductivity and high sodium ion transference number in a wide temperature range, and low desolvation energy, and can reduce the interface charge transfer impedance of an electrode-electrolyte, so that the performance of the battery is improved. Sodium ions can be quickly embedded and separated when reaching the electrode, so that the wide-temperature-range performance of the sodium ion battery is improved, and the sodium ion battery has excellent wide-temperature-range charge-discharge specific capacity, cycling stability and high-rate performance.

The present invention relates to a process for preparing a double metal cyanide (DMC) catalyst, comprising the reaction of an aqueous solution of a cyanide-free metal salt, an aqueous solution of an alkaline metal cyanide salt, an organic complex ligand and optionally a complex-forming component, wherein the metal cyanide salt is one or more compound(s) and is selected from the group consisting of potassium hexacyanocobaltat(III), potassium hexacyanoferrate(II), potassium hexacyanoferrate(III), calcium hexacyanocobaltate(III) and lithium hexacyanocobaltat(III), where the organic complex ligand is one or more compound(s) and is selected from the group consisting of dimethoxyethane, tert-butanol, 2-methyl-3-buten-2-ol, 2-methyl-3-butyn-2-ol, ethylene glycol mono-tert-butyl ether and 3-methyl-3-oxetanemethanol, and wherein the alkaline metal cyanide salt used has an alkalinity by the titration method disclosed in the Experimental of between 0.700% and 3.000% by weight of sodium hydroxide (NaOH) based on the total weight of the alkaline metal cyanide salt used. The invention further relates to double metal cyanide (DMC) catalysts obtainable by the process according to the invention and to the use of DMC catalysts for preparation of polyoxyalkylene polyols.

The invention discloses a low-temperature high-ionic-conductivity ether-ester composite sodium ion electrolyte and a preparation method thereof, and belongs to the technical field of energy storage battery materials, the electrolyte comprises ethylene glycol dimethyl ether, ethylene carbonate and methyl ethyl carbonate as basic solvents, and two brand-new modified compounds, namely methyl-2-(2, 2, 3, 3-tetrafluoropropoxy)-1, 2, 3, 4, 4-tetramethyl-1, 3, 4, 4-tetramethyl-1, 3, 4-tetramethyl-1, 3, 4-tetramethyl-1, 3, 4-tetramethyl-1, 3, 4-tetramethyl-1, 3, 4-tetramethyl-1, 3, 4-tetramethyl-1, 3, 4- According to the invention, 2, 3-dioxolane-4-yl phosphonate and cyclo (2-hydroxypropyl-2 '-hydroxyethyl) sulfate are used as auxiliary materials, and fluoroethylene carbonate, sodium bis (fluorosulfonyl) imide and sodium perchlorate are used as auxiliary materials. Wherein the freezing point of fluoroether phosphonate is reduced through a fluorinated chain segment, and a phosphonic acid group promotes ion dissociation and stabilizes an interfacial film; the cyclic hydroxyl sulfonate inhibits molecular association through a cyclic structure, hydroxyl reduces the viscosity of a solvent, and sulfonate groups optimize the conductivity of an interfacial film. The prepared low-temperature high-ionic-conductivity ether-ester composite sodium ion electrolyte is high in ionic conductivity at low temperature, stable in interfacial film and long in cycle life.

The present application relates to a synthesis method of deuterium-labeled substances containing deuterium atom structural units, which comprises mixing aryl chloride with deuterium water in an organic solvent, adding a catalyst of ethylene glycol dimethyl ether-nickel dichloride and a ligand of 2,9-dimethyl-1,10-phenanthroline, and then reacting under the condition of zinc powder and nitrogen protection to obtain the deuterium element labeled compound. The present application uses ethylene glycol dimethyl ether-nickel dichloride as a catalyst, and aryl chloride can react with deuterium water to generate deuterium atom substitution products under the condition of nitrogen at normal temperature and pressure. The reaction condition is simple and mild. Meanwhile, the range of alternative substrates is more extensive, and the use of inexpensive nickel as a catalyst has higher economic value compared with the previous reports.

This invention relates to a method for preparing a bimetallic cyanide (DMC) catalyst, comprising a reaction of an aqueous solution of a cyanide-free metal salt, an aqueous solution of a basic metal cyanide salt, an organic complexing ligand, and optionally a component forming a complex, wherein the metal cyanide salt is one or more compounds selected from potassium hexacyanocobalt(III), potassium hexacyanoferrate(II), potassium hexacyanoferrate(III), calcium hexacyanocobalt(III), and lithium hexacyanocobalt(III), wherein the organic complexing ligand is one or more compounds selected from dimethoxyethane, tert-butanol, 2-methyl-3-buten-2-ol, 2-methyl-3-butyn-2-ol, ethylene glycol mono-tert-butyl ether, and 3-methyl-3-oxetane-methanol, and wherein the basic metal cyanide salt used has an alkalinity between 0.700 wt% and 3.000 wt% sodium hydroxide (NaOH) based on the total weight of the basic metal cyanide salt used, determined by titration as disclosed in the experimental section. Another subject of the invention includes a bimetallic cyanide catalyst (DMC) obtainable by the method according to the invention, and the use of said DMC catalyst in the preparation of polyoxyethylene polyols.

The invention belongs to the technical field of lithium battery electrolytes, and relates to a wide temperature range electrolyte for a lithium metal battery, a preparation method and application thereof, the electrolyte comprises a lithium salt, N, N dimethyl-trifluoromethyl sulfonamide, an ether cosolvent, a hydrofluoroether diluent and a film-forming additive; the ether cosolvent comprises ethylene glycol dimethyl ether, ethylene glycol diethyl ether, cyclopentyl methyl ether, tetrahydrofuran and 2-methyltetrahydrofuran; the hydrofluoroether diluent comprises the following components: 1, 1, 2, 2-tetrafluoroethyl-2, 2, 3, 3-tetrafluoropropyl ether, 1, 1, 2, 2-tetrafluoroethyl-2, 2, 2-trifluoroethyl ether, and 2, 2, 2-trifluoroethyl ether, and the hydrofluoroether diluent comprises the following components: 1, 1, 2, 2-tetrafluoroethyl-2, 2, 3, 3-tetrafluoropropyl ether, 1, 1, 2, 2-tetrafluoroethyl-2, 2, 2-trifluoroethyl ether; the film-forming additive comprises lithium nitrate, vinylene carbonate and fluoroethylene carbonate; the working temperature range of the electrolyte is-40-60 DEG C, negative ions can be promoted to enter a lithium ion solvation sheath, construction of inorganic component-rich SEI in a wide temperature range is realized, and the wide temperature range cycle stability of the battery is improved.

The present invention addresses the problem of providing an electrolyte solution for a lithium metal secondary battery, which, when using 1, 2-dimethoxyethane (DME) as a solvent, is capable of simultaneously suppressing an increase in the resistance of the lithium metal secondary battery, suppressing the generation of gas, and suppressing an increase in the thickness of the negative electrode. The present invention is an electrolyte solution for a lithium metal secondary battery, the electrolyte solution comprising an electrolyte salt, an organic solvent, and a first additive, the electrolyte salt comprising lithium bis (fluorosulfonyl) imide (LiFSI), the organic solvent comprising 1, 2-dimethoxyethane (DME), the first additive being N, N-dimethyltrifluoromethanesulfonamide (DMTMSA), or N, N-dimethylformamide (DMTMSA), and the electrolyte solution comprising lithium bis (fluorosulfonyl) imide (LiFSI), the organic solvent comprising 1, 2-dimethoxyethane (DME), and the second additive comprising N, N-dimethyltrifluoromethanesulfonamide (DMTMSA), or N, N-dimethyltrifluoromethanesulfonamide (DMTMSA). The electrolyte solution for a lithium metal secondary battery contains at least one of N, N-dimethylaminosulfonyl fluoride (DMSF), and the first additive is contained in an amount of 0.2 parts by mass or more when the total mass of the electrolyte salt and the organic solvent is taken as 100 parts by mass.

The invention provides a lithium ion battery electrolyte, a battery and an electrochemical device, and relates to the technical field of energy storage and power batteries, the electrolyte comprises a lithium salt, an organic solvent and a film-forming additive, the organic solvent comprises at least one of carboxylic ester, ethers and nitriles; the ethers comprise ethylene glycol dimethyl ether, diethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, tetrahydrofuran or 1, 3-dioxolane; the nitrile comprises at least one of acetonitrile and butyronitrile. According to the invention, the electrolyte can maintain the physical characteristics of low viscosity and high conductivity in a low-temperature environment, so that the migration and diffusion rate of the electrolyte in the low-temperature environment of-60 DEG C is effectively improved; the low-temperature discharge capacity retention ratio at the temperature of minus 60 DEG C reaches 65.23%-68.71%, and the cycle capacity retention ratio at the temperature of minus 40 DEG C reaches 70.12%-73.83%.

The invention belongs to the technical field of organic synthesis, and discloses a preparation method for trifluoromethylation of a 1, 6-enyne substrate. The preparation method comprises the following steps: in a protective gas atmosphere, mixing a 1, 6-eneyne substrate, NaSO2CF3, an oxidant, N-bromosuccinimide and an organic solvent, heating to react, cooling, separating an organic phase, drying and purifying to obtain a product after trifluoromethylation of the 1, 6-eneyne substrate, the organic solvent is selected from any one of dimethoxyethane and 1, 2-dichloroethane. The preparation method is mild in reaction condition, simple and convenient to operate, good in substrate applicability, good in substrate selectivity in reaction and high in target product yield, and a new way is provided for trifluoromethylation of the 1, 6-eneyne compound.

The present invention discloses a low-corrosive phase-change absorbent and its application in carbon dioxide capture, belonging to the field of carbon dioxide capture and separation technology. The low-corrosive phase-change absorbent comprises the following components by weight: 10-30% of a main absorbent, 1-10% of an activator, 30-60% of a phase separator, and the balance being water. The phase-change absorbent of the present invention uses 3-aminopropanol (MPA) as the main absorbent, 3-dimethylaminopropylamine (DMAPA) as the activator, and polyethylene glycol dimethyl ether (NHD) as the phase separator, and has the advantages of low energy consumption and low corrosivity.

This invention relates to the fields of materials science and chemistry, and discloses a method for preparing a metal ion-doped defective FER molecular sieve. The method includes a molecular sieve using Cu and Co as doping ions, with a basic framework of a defective FER molecular sieve having a silicon-to-aluminum ratio of 30-40. The molecular sieve is based on the mass of the defective FER molecular sieve, and the mass percentage of the doping ions is 3-5%. This invention employs a two-step synthesis method. The first step involves hydrothermal crystallization to synthesize a pre-crystallized FER molecular sieve. The second step increases the hydrothermal crystallization temperature, causing the unstable molecular sieve structure to transform into a high silicon-to-aluminum ratio defective crystal form under high temperature and pressure, while simultaneously introducing heteroions into the molecular sieve framework. Compared to traditional techniques, this method can achieve a larger doping amount and is simpler with readily available raw materials. Its application in the catalytic synthesis of ethylene glycol dimethyl ether from ethylene glycol and methanol can achieve high conversion rates and high selectivity, demonstrating significant economic value and market potential.

The present application belongs to the field of activators, and particularly relates to an activator for improving the adhesion of yarn and rubber and the use thereof. The activator is composed of 38-68wt% component A: alkyl silane, 24.2-41.2wt% component B: fatty acid polyoxyethylene ester, 5.5-13wt% component C: triethylene glycol dimethyl ether and 0.6-4.7wt% component D: alkyl phenol polyoxyethylene ether. The activator of the present application can improve the adhesion of yarn and rubber.