196 results about "Carbonate ester" patented technology

This invention discloses a cross-linked copolymer coating for negative electrodes, its preparation method, and its application, relating to the field of solid-state battery negative electrode protection technology. The coating is formed by in-situ copolymerization of a precursor composition consisting of carbonate monomers with unsaturated double bonds, hydroxyl-rich natural polymer derivatives, lithium salts, and an initiator. The rigid cellulose skeleton in the copolymer regulates the degree of polymerization of the carbonate monomers through a hydrogen bond network, forming a protective layer with a rigid-flexible block structure, resulting in a uniform and dense SEI film. The hydrogen bond anchoring effect of high-density hydroxyl and carbonyl groups inhibits polycarbonate segment degradation and improves interfacial chemical stability. The three-dimensional hydrogen bond network endows the coating with excellent mechanical strength and flexibility, synergistically buffering volume changes and inhibiting lithium dendrite growth. This preparation process is simple and controllable, effectively reducing the probability of battery short circuits and improving safety performance and cycle stability.

Chemical processing techniques for removing colorant from polyester materials for recycling are described. According to an embodiment, a method for producing a purified polyester material, can comprise contacting a heated solution comprising a solvent to a polyester material as positioned within a vessel, wherein the polyester material comprises one or more additive components, and removing at least some of the one or more additive components from the polyester material as a result of the contacting, resulting in a transformation of the polyester material into the purified polyester material. In an example, the solvent comprises a ketone, an ether, an ester, an alcohol and / or a carbonate. The one or more additive components can include a colorant and / or other contaminates.

This invention belongs to the field of lithium-ion battery flame retardant technology, specifically relating to a flame-retardant electrolyte, its preparation method, and its application. The electrolyte comprises: lithium salt, carbonate organic solvent, co-solvent, and flame-retardant additive; the concentration of lithium salt in the electrolyte composed of lithium salt and carbonate organic solvent is 0.5–5 mol / L; the volume ratio of carbonate electrolyte to flame-retardant additive is 100:(1–30); the volume ratio of co-solvent to flame-retardant additive is (4–120):(1–5); the co-solvent is a solvent capable of dissolving the flame-retardant additive, and the flame-retardant additive is a perfluorohexane derivative. This invention proposes introducing a co-solvent that does not interact with lithium ions into the electrolyte. Through the bridging effect of the co-solvent, the insoluble flame retardant is introduced into the conventional electrolyte. The flame-retardant electrolyte prepared by this method does not deteriorate its electrochemical performance due to the addition of the flame retardant, thus solving the problem of incompatibility between the flame-retardant performance and electrochemical performance of lithium-ion battery electrolytes.

This invention relates to a method for preparing a capped polycarbonate resin, comprising the steps of: a) reacting a dihydroxy compound and a carbonate in a melt, optionally in the presence of an transesterification catalyst, thereby forming a polycarbonate in a molten phase having free hydroxyl terminal groups; and b) reacting the polycarbonate in the molten phase with a capping agent to produce a capped polycarbonate resin, wherein the capping agent comprises an anhydride, and wherein the polycarbonate in the molten phase is subjected to at least partially vacuum after being combined with the capping agent. The invention also relates to capped polycarbonate resins obtained or obtainable by this method. Furthermore, the invention relates to molding articles comprising or composed of such capped polycarbonate resins, and methods for manufacturing such molding articles.

Provided is a polymerizable composition including (a) a polymerizable component comprising a diol bis(allyl carbonate) and / or a pre-polymer thereof; and (b) a polymerization initiator component including: (i) a di(C6-C10 alkyl) peroxydicarbonate, and (ii) an organic peroxide having one peroxy, one peroxycarbonate, or one peroxybenzoate group and a 1,1-dimethylalkyl group bonded to a peroxy oxygen, where (ii) comprises a molecular weight ranging from 200 to 250 g / mole, the polymerization initiator (b) is free of diisopropyl peroxydicarbonate, (i) comprises an amount ranging from 4.87% to 7.90% by weight relative to the total solids of the polymerizable composition and (ii) comprises an amount within the range defined by the following formula: (4.406X2−0.592X+0.021)≤Y≤(0.726X2−0.121X+0.009) where X corresponds to the weight fraction of (i) and Y corresponds to the weight fraction of (ii). Also provided is a method of making an optical article from the polymerizable composition.

Lithium-ion battery, characterized in that it consists of a cathode, an anode and a non-aqueous electrolyte; wherein the cathode comprises a cathode material layer containing an active cathode material, wherein the active cathode material comprises a compound represented by formula (A): Li x Ni a Co b M' 1-a-b O 2-y A y Formula (A) where in formula (A) -0.1 ≤ x ≤ 0.2, 0.8 ≤ a < 1, 0 ≤ b < 0.2, 0.8 ≤ a + b < 1, 0 ≤ y < 0.2 hold; where M' comprises one or both of the elements Mn or Al and zero, one or more of the elements Sr, Mg, Ti, Ca, Zr, Zn, Si, Fe, B, Ga, Cr, W, V, Nb and Ce; where A comprises one or more of S, N, F, B, Cl, Br and I; wherein the anode comprises an anode material layer containing an active anode material, wherein the active anode material comprises a silicon-based material; wherein the non-aqueous electrolyte comprises a lithium salt and an organic solvent, wherein the organic solvent comprises cyclic carbonate, and wherein the cyclic carbonate comprises fluorinated ethylene carbonate and propylene carbonate; where the lithium-ion battery meets the following conditions: 0.2 ≤ S / F ≤ 2 ,0 ,2 ≤ P / F ≤ 3 ,5 and 3 ≤ S ≤ 15 ,2 ≤ F ≤ 15 ,2 ≤ P ≤ 25 , 15 ≤ C ≤ 40; where S denotes the mass fraction of silicon in the anode material layer, expressed in wt.%; where F denotes the mass fraction of fluorinated ethylene carbonate in the non-aqueous electrolyte, expressed in wt.%; where P denotes the mass fraction of propylene carbonate in the non-aqueous electrolyte, expressed in wt.%; where C denotes the mass fraction of cyclic carbonate in the non-aqueous electrolyte, expressed in wt.%.

This invention discloses an axially chiral 1,4'-biquinolinone and its derivatives, and a synthetic method thereof. The method uses MBH carbonate and quinoline-2(1 H Using β-ketones as raw materials, (DHQD)₂PYR as catalyst, and DME as solvent, a centrally chiral β-substituted allyl intermediate was synthesized; then, using iron powder as a reducing agent and acetic acid as solvent, enantiomeric enriched centrally chiral γ-lactam compounds were obtained; finally, using DBN as a base and DME as solvent, enantiomeric enriched compounds were obtained. (S) -Axial chiral 1,4'-biquinolinone or its derivatives. The method of this invention has mild reaction conditions, readily available raw materials, high enantioselectivity of the product, and excellent yield. The synthesized 1,4'-biquinolinone or its derivatives can be further used to synthesize novel substituted quinolinone phosphonate compounds, and to synthesize drugs with antibacterial, antimalarial, anticancer, antitumor, or herbicidal activities, showing broad application prospects.

A polycarbonate composition includes particular amounts of a bisphenol A homopolycarbonate, a polycarbonate including repeating units derived from a substituted or unsubstituted cyclohexylidene-bridged bisphenol, and a polyester-carbonate. The composition can exhibit a combination of desirable properties, including low haze and good scratch resistance. Methods for the manufacture of the composition and articles including the composition are also disclosed.

The present application relates to a kind of lithium ion battery electrolyte and secondary lithium battery.For improving the cycle performance at room temperature and high temperature cycle performance of high-voltage secondary lithium battery, the present application provides a kind of lithium ion battery electrolyte, it includes base electrolyte and additive, base electrolyte includes organic solvent and lithium salt, organic solvent includes carbonate solvent and fluorinated carbonate solvent, and the mass ratio of carbonate solvent and fluorinated carbonate solvent is 1 :(1-3), additive includes potassium salt additive.The present application improves the cycle performance of conventional base electrode liquid under high voltage by adding special potassium salt additive, the present application further further with the appropriate amount of special film-forming additive is used with the appropriate amount of potassium salt additive, prevents the further decomposition of electrolyte, also can keep better cycle performance under the high voltage of 5V, improved lithium ion battery electrolyte can be applied to high-voltage spinel lithium nickel manganese oxide secondary lithium battery.

This invention relates to a non-flammable and safe electrolyte for high-voltage positive / silicon-carbon negative lithium-ion batteries and the lithium-ion battery itself. The electrolyte comprises a main solvent, a lithium salt, a flame retardant, and additives; the main solvent comprises fluoroethylene carbonate and linear carbonates or linear carboxylic acids. The lithium salt is lithium hexafluorophosphate. The flame retardant is (ethoxy)pentafluorocyclotriphosphazene. The concentration of the lithium salt in the electrolyte is 0.8–1.6 mol·L⁻¹. ‑1 The flame retardant has a mass percentage content of 1-10%, and each additive has a mass percentage content of 1-5%. The lithium-ion battery includes a positive electrode, a negative electrode, and a high-voltage positive electrode / silicon-carbon negative electrode. The lithium-ion battery uses a non-flammable and safe electrolyte. Compared with existing technologies, this invention has advantages such as being non-flammable, having good safety, high conductivity, good oxidation stability, compatibility with silicon-carbon negative electrodes, and promising application prospects.

This invention provides a method for synthesizing dimethyl carbonate, belonging to the field of carbonate compound synthesis technology. The synthesis method of this invention does not require high temperature and high pressure conditions, and can be carried out at room temperature and pressure, significantly reducing energy consumption and equipment requirements. By coupling the reduction and oxidation reactions of photoelectrochemical carbon dioxide conversion, the synthesis energy barrier of dimethyl carbonate is lowered, improving energy utilization efficiency. Using greenhouse gas carbon dioxide as the main raw material, waste resource utilization is achieved, and the energy used is clean energy such as solar or electrical energy, avoiding pollution at the source. This invention couples the carbon dioxide conversion and dimethyl carbonate synthesis steps, realizing the recycling of the reactant methanol within the system, simplifying the process flow. The combined use of light and electrical energy produces a synergistic effect, improving the reaction rate and the selectivity of dimethyl carbonate.

The application relates to the field of polyurethane foaming materials, and discloses a low-VOC polyurethane foaming compound and a preparation method thereof; the low-VOC polyurethane foaming compound comprises A component and B component which are mutually packed, the A component comprises low-aldehyde polyether polyol, polyether carbonate polyol, functionalized polyurethane oligomeric polyol, reactive tertiary amine catalyst, foam stabilizer and water, and the B component comprises a low-free-monomer isocyanate component; the functionalized polyurethane oligomeric polyol is prepared by reacting polyether carbonate polyol, diisocyanate and a hydroxyl compound containing a 1,3-dicarbonyl structure and having two or more hydroxyl groups. The preparation method comprises the steps of functionalized polyurethane oligomeric polyol preparation, A component dispensing, B component dispensing and packing. By introducing the reactive oligomeric polyol with the 1,3-dicarbonyl structure into the foaming system, the volatile components brought by raw materials can be reduced, and the continuous control ability of aldehyde components in the foaming process and the post-maturation process can be improved.

This invention relates to a method for producing flame-retardant polycarbonate resin composition granules, the polycarbonate resin composition granules comprising: 30-95% by mass of resin granules (A), wherein the resin granules (A) contain more than 40% by mass of polycarbonate resin; 5% by mass and more than but less than 25% by mass of a phosphate ester flame retardant (B) which is liquid at room temperature, etc. The method includes: a first step of placing (A), (C), (D), and (E) in a twin-screw extruder and kneading them in a first kneading section; a second step of adding (B) to a downstream portion of the first kneading section and kneading it in a second kneading section; and a third step of depressurizing the vent in the downstream portion of the second kneading section to devolatilize and extrude, wherein the first kneading section has a specific screw configuration in which its length is 3.5-5.5D, and the second kneading section has a specific screw configuration in which its length is 2.0-4.0D.

The application provides a method for in-situ preparation of a solid-state electrolyte based on carbonates, comprising: S1 mixing a first monomer A, a second monomer B and a lithium salt C uniformly to obtain a precursor solution; S2 adding an initiator D to the precursor solution, and stirring and dissolving to obtain an electrolyte solution; and S3 assembling the electrolyte solution with a positive electrode and a negative electrode to form a lithium ion battery, and the electrolyte solution is in-situ polymerized in the battery to form a solid-state electrolyte. A low-molecular-weight ether monomer with good film-forming property is used as a flexible matrix, and a cyclic carbonate monomer or a linear carbonate monomer with high mechanical strength is introduced as a functional monomer, and the carbonate groups are grafted onto the ether-based polymer chain through in-situ polymerization. By introducing groups with different steric hindrance effects, the packing state of the polymer chain and the charge distribution in the electrolyte are effectively controlled, and the long-term cycle stability, rate performance, thermal stability and high-voltage resistance of the all-solid-state battery are significantly improved.

Additives that decompose during charging of alkali-metal battery and alkali-ion battery cells such that the additives form part of the SEI layer and the CEI layer are provided for adding to electrolytes in such cells. Sulfonamide-based compounds may be used as additives into baseline electrolytes for alkali metal and alkali-ion batteries. As electrolyte additives, these compounds promote the formation of inorganic-rich solid electrolyte interphases and passivates electrode interfaces, resulting in improved battery performance. Solvents for the baseline electrolyte may include carbonate-based, ether-based, ester-based, sulfone-based, sulfonated-based, nitrile-based, sulfonamide-based, phosphate-based, ionic liquids, and mixtures thereof. These solvents may be non-fluorinated or fluorinated. The percent weight of solvent with respect to the total weight of the electrolyte may be from 0.05 wt % to 99 wt %, and preferably from 10 wt % to 90 wt %.

The application provides a fluorine-free ester-based electrolyte, a preparation method and a high-voltage lithium ion battery. The fluorine-free ester-based electrolyte comprises a lithium salt, a fluorine-free solvent and a fluorine-free additive; the fluorine-free solvent is a methylated linear carbonate and / or a methylated linear carboxylate, and the fluorine-free additive is a cyclic boroxine or a cyclic siloxane with 3-5 carbon-carbon double bonds; the methylated linear carbonate has a general structural formula as shown in formula (1); wherein R1 and R2 are independently alkyl groups with 1-4 carbon atoms, and the carbon atom number of at least one of R1 and R2 is greater than or equal to 3; the methylated linear carboxylate has a general structural formula as shown in formula (2); wherein R3 is a hydrogen atom or an alkyl group with 1-4 carbon atoms, R4 is an alkyl group with 2-4 carbon atoms, and the carbon atom number of at least one of R3 and R4 is greater than or equal to 3. The fluorine-free ester-based electrolyte can significantly prolong the cycle life of the lithium ion battery.

The present invention relates to a polycarbonate-polyorganosiloxane copolymer including: a polycarbonate block containing a structural unit (A-1) represented by the following formula (1); and a polyorganosiloxane block containing a structural unit (A-2) represented by the following formula (2), the polycarbonate-polyorganosiloxane copolymer satisfying the following conditions (I) and (II), and to a polycarbonate-based resin composition including the polycarbonate-polyorganosiloxane copolymer and a molded body including the polycarbonate-based resin composition.

To provide a mixed cement composition that exhibits excellent compressive strength while using blast furnace slag, which has a low basicity. [Solution] The mixed cement composition contains Portland cement, blast furnace slag, and carbonate ester. The basicity calculated from formula (1) below based on the chemical composition of the blast furnace slag is 1.79 or less, and the gypsum content is 4.0% by mass or less in terms of SO3, based on the total amount of Portland cement, blast furnace slag, and gypsum. Basicity = (CaO + MgO + Al2O3) / SiO2 ... Equation (1) [In formula (1), CaO represents the content (mass%) of calcium oxide in the blast furnace slag, MgO represents the content (mass%) of magnesium oxide in the blast furnace slag, Al2O3 represents the content (mass%) of aluminum oxide in the blast furnace slag, and SiO2 represents the content (mass%) of silicon dioxide in the blast furnace slag.]

The present application provides a solid electrolyte containing an electrolyte solution containing a lithium salt and a carbonate-based solvent, and metal oxide particles. In the solid electrolyte, the lithium salt is at least one selected from lithium bis(fluorosulfonyl)imide and lithium fluoroborate, the carbonate-based solvent is at least one selected from dimethyl carbonate and propylene carbonate, the molar ratio of the lithium salt to the carbonate-based solvent (lithium salt / carbonate-based solvent) is 1 / 4 or more and 1 / 1 or less, the mass ratio of the electrolyte solution to the metal oxide particles (electrolyte solution / metal oxide particles) is 72 / 28 or more and 93 / 7 or less, and the specific surface area of the metal oxide particles, measured based on the BET method, is 160 m 2 / g or more and 700 m 2 / g or less.

The present invention provides an electrolyte composition for a lithium secondary battery and a lithium secondary battery comprising the same. The electrolyte composition includes a lithium salt and a non-aqueous organic solvent composed of a first carbonate-based solvent and a second carbonate-based solvent, wherein the second solvent includes a compound of Chemical Formula 1. By adjusting the volume ratio of these solvents and the content of the compound of Chemical Formula 1, the electrolyte achieves improved flame retardancy, prolonged cycle life and high decomposition voltage stability. A lithium secondary battery using such an electrolyte exhibits strong capacity retention, has excellent durability at high temperatures, and has stable performance during high-voltage operation.

Chemical processing techniques for removing colorant from polyester materials for recycling are described. According to an embodiment, a method for producing a purified polyester material, can comprise contacting a heated solution comprising a solvent to a polyester material as positioned within a vessel, wherein the polyester material comprises one or more additive components, and removing at least some of the one or more additive components from the polyester material as a result of the contacting, resulting in a transformation of the polyester material into the purified polyester material. In an example, the solvent comprises a ketone, an ether, an ester, an alcohol and / or a carbonate. The one or more additive components can include a colorant and / or other contaminates.

The present invention relates to an electrolyte for a sodium secondary battery and a sodium secondary battery comprising same. More specifically, when an electrolyte comprising a solvent combining a cyclic carbonate solvent, a linear carbonate-based solvent, and / or an ester-based solvent is applied to a sodium secondary battery, the output performance of the sodium secondary battery can be improved.

This invention belongs to the field of lithium metal battery technology, specifically relating to an isocyanate-containing in-situ gel electrolyte, its preparation method, and its application. The in-situ gel electrolyte uses methacrylate compounds containing coordinating functional groups as monomers and lithium salts containing carbonate solvents as electrolytes. After mixing, the mixture undergoes in-situ polymerization under the action of a crosslinking agent to form a composite gel system. The methacrylate compounds contain isocyanate groups, or the methacrylate compounds undergo crosslinking polymerization to form isocyanate-derived structures. This invention uses methacrylate compounds to undergo in-situ polymerization to form strongly coordinated polymers, which serve as a continuous backbone to selectively anchor Li at the molecular scale with strong coordination sites. + Carbonate-based solvents reduce the binding of anions and strong solvents at the solvation level, thereby forming a synergistic effect of "strong coordination framework + weak coordination solvent", resulting in a gel electrolyte with high lithium-ion mobility, stable interface and high voltage adaptability.

This invention discloses a chlorinated polycarbonate-based polyurethane for lithium-ion battery binders and its preparation method. The polyurethane is prepared from carbon dioxide-based polycarbonate diols with chlorine-containing side groups through chain extension with diisocyanate and small-molecule diols. This polyurethane possesses excellent mechanical properties, outstanding heat resistance, and low-temperature flexibility. As a binder for lithium-ion batteries, it contains numerous polar carbonate groups and chlorine groups, facilitating lithium-ion migration and exhibiting high ionic conductivity. The chlorine atoms in the side groups also impart good flame retardancy to the binder, enhancing battery safety. Because the soft segments are carbon dioxide-based copolymers, compared to commonly used PVDF binders, this polyurethane binder also offers advantages such as biodegradability, low cost, and easier recycling of electrode materials.

This application provides a non-aqueous electrolyte, a secondary battery, and a power consumption device. The non-aqueous electrolyte includes an additive, which includes a first additive and a second additive, wherein the first additive is one or more cyclic sulfate ester compounds having the structure shown in general formula (I), and the second additive is one or more cyclic carbonate ester compounds having the structure shown in general formula (III) or general formula (IV). JPEG2026518245000061.jpg74170

The present disclosure relates to novel polyvinyl chloride compositions comprising a polyvinyl chloride resin, a polycarbonate resin, and a copolyester resin. More particularly, the present disclosure relates to polyvinyl chloride compositions comprising a blend of a polycarbonate and a high glass transition temperature (Tg) copolyester to increase the Tg and heat distortion temperature under load (HDTUL) of the polyvinyl chloride composition.

The present invention relates to a cleaning agent composition which is excellent in cleaning property and does not corrode plastic substrates such as polycarbonate and polystyrene which are not resistant to solvents. The cleaning agent composition of the present invention comprises the following (A) to (C) components, the mass ratio of the (A) component and the (B) component being 11:89 to 99:1, (A) cis-1-chloro-3,3,3-trifluoropropene, (B) one or more compounds selected from the group consisting of hydrofluoroolefins, hydrofluorocarbons and hydrofluoroethers which do not contain a chlorine atom, and (C) a hydrocarbon solvent.

A polycarbonate composition includes particular amounts of a linear polycarbonate, a first poly(carbonate-siloxane) copolymer, a second poly(carbonate-siloxane) copolymer and optionally, one or more of a branched polycarbonate, a highly branched polycarbonate, or a second linear polycarbonate. Methods for the manufacture of the composition are also disclosed. The compositions can be particularly useful in the preparation of various articles, particularly thin-walled articles for application where a high degree of chemical resistance is desired.