121 results about "Fluorinated ether" patented technology

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.

Embodiments relate to an electrolyte composition including a cyclic fluorinated ether diluent configured to configured to control reactions between a metal anode of a metal ion battery and the electrolyte composition. Embodiments further relate to a solid electrolyte interphase (SEI) bilayer formed on a surface of the metal anode and to a metal ion battery including the cyclic fluorinated ether diluent and / or the SEI bilayer.

The present invention pertains to an anode-less lithium ion battery comprising a) a cathode comprising a cathode current collector and a cathode electro-active material on the cathode current collector; b) an anode current collector; c) a liquid electrolyte composition between the a) cathode and the b) anode current collector; and d) a separator, wherein the c) liquid electrolyte composition comprises i) at least 70% by volume (vol %) of a solvent mixture with respect to the total volume of the electrolyte composition, comprising at least one fluorinated ether compound and at least one non-fluorinated ether compound, and ii) at least one lithium salt.

An electrolyte includes a salt, a first fluorinated diether having a degree of fluorination of 10% to 25%, and a second fluorinated ether having a degree of fluorination of 40% to 100%, wherein the degree of fluorination is determined by dividing a total number of carbon atoms in the first fluorinated diether or the second fluorinated ether, which is substituted with at least one fluoro by a total number of carbon atoms in the corresponding first fluorinated diether or the second fluorinated ether, and wherein the first fluorinated diether and the second fluorinated ether have a volume ratio of 1:4 to 4:1.

The application provides a kind of sodium ion battery with flame-retardant electrolyte, it includes the following components: base electrolyte and functional additives;Wherein, the base electrolyte includes solvent and sodium salt;The solvent includes main solvent and optional secondary solvent;The sodium salt includes main sodium salt and optional secondary sodium salt;The main solvent is phosphorus-containing flame-retardant solvent, the secondary solvent is selected from at least one of carbonate solvent, carboxylic acid ester solvent and ether solvent of non-fluorinated ether;The molar ratio of the phosphorus-containing flame-retardant solvent and sodium salt is 4.2-17:1;The mass fraction of the main sodium salt in sodium salt is 70%-100%;The volume fraction of the main solvent in the solvent is 80%-100%;The mass fraction of the functional additives in the electrolyte is greater than 0 and less than or equal to 5%.The application also provides a kind of sodium ion secondary battery, which includes positive electrode material, negative electrode material and the sodium ion battery with flame-retardant electrolyte of the application.The electrolyte of the application is low in cost, high in safety, and can be compatible with carbon negative electrode.

The application provides a fluorinated ether solvent and an electrolyte applied to energy storage batteries, especially lithium metal batteries, and the fluorinated ether solvent has a structure shown in formula I. By introducing at least one fluorine atom at both ends of an ether molecular chain, the fluorinated ether molecule has excellent salt solubility, the introduction of the fluorine atom can effectively reduce the electron cloud density of ether oxygen to improve the oxidation stability of the ether molecule, and excellent cycle stability of the high-voltage lithium metal battery is achieved; meanwhile, the locally strong polar fluorinated end group can interact with the cation of the salt to improve the ionic conductivity of the electrolyte, and the rapid charge-discharge performance of the high-voltage lithium metal battery is improved.

To provide a method capable of separating a monofunctional species, bifunctional species, etc. of a fluorinated ether compound having a polyfluoropolyether chain and a predetermined functional group in good yield and with high separation performance.A separation method for separating a compound represented by the formula (1) and a compound represented by the formula (2) from a mixture containing them by chromatography using a stationary phase and a mobile phase, wherein the mobile phase contains at least one type of specific solvent selected from a hydrofluoroolefin, a hydrochlorofluoroolefin, a chlorofluoroolefin, a cyclic hydrofluoroolefin, a cyclic hydrochlorofluoroolefin, a cyclic chlorofluoroolefin, a cyclic hydrofluorocarbon, a cyclic hydrochlorofluorocarbon, a cyclic chlorofluorocarbon and a perfluoroketone:A-(OX)m—O—Z—(R)n1  Formula (1)(R)n2—Z—(OX)m—O—Z—(R)n3  Formula (2)

A battery cell, a vehicle having a battery cell, and a method for forming a battery cell are provided. The battery cell includes: a cathode electrode including a cathode active material, where the cathode active material includes lithium sulfide (Li2S); an anode current collector serving as an anode electrode; solvating an ionic liquid (SIL) electrolyte; and a fluorinated ether diluent.

The invention relates to a lithium-sulfur secondary battery. The present invention provides a lithium-sulfur secondary battery comprising a positive electrode, a negative electrode, a separator, and an electrolyte. The positive electrode has an SC factor value of 0.45 or more. The electrolyte includes a solvent and a lithium salt, and the solvent includes a first solvent having a DV2 factor value of 1.7 or less and a second solvent as a fluorinated ether-based solvent.

The present disclosure provides an electrolyte and a lithium battery, the electrolyte comprising a fluorinated ether solvent; wherein the fluorinated ether solvent comprises at least one compound of formula (I): wherein R2 is a C4 alkylene or a C4 fluoroalkylene, wherein the number of fluorine atoms in the C4 fluoroalkylene is 1; R1 and R3 are each independently methyl or fluoromethyl, and the total number of fluorine atoms in R1 and R3 is 1-4; such an electrolyte can improve the cycle performance of a medium-nickel high-voltage lithium battery, reduce the direct current resistance growth rate under high-temperature storage conditions, and is conducive to long-term stable operation of the lithium battery.

A lithium ion battery includes a cathode including a cathode active material; an anode including silicon, a conductive carbon, lithium metal, or a combination of any two or more thereof; a separator; and an electrolyte including a lithium sulfonylimide salt, a dicarbonyl solvent, and a fluorinated ether solvent.

The invention discloses a new lithium battery material and a preparation method thereof, and relates to the technical field of lithium ion batteries, the new lithium battery material comprises an electrolyte, and the electrolyte comprises a solvent, a composite lithium salt and a functional additive; the solvent comprises fluoro-carbonate, ionic liquid and fluoro-ether; the composite lithium salt comprises lithium bis (fluorosulfonyl) imide (LiFSI), lithium bis (trifluoromethyl) sulfonyl imide (LiTFSI) and lithium bis (oxalato) borate (LiBOB); the functional additive comprises silane modified vinylene carbonate and tris (trimethylsilyl) phosphate. The composite lithium salt is matched with the functional additive and the solvent, so that the battery has relatively good discharge performance and cycle performance in a temperature range of-30 DEG C to 70 DEG C, and has good wide-temperature applicability.

The invention discloses a triazine perfluoroether rubber secondary vulcanization atmosphere control method and a product thereof, the triazine perfluoroether rubber secondary vulcanization atmosphere control method comprises the following steps: S1, triazine perfluoroether rubber subjected to primary vulcanization is subjected to secondary vulcanization in an inert gas atmosphere, the moisture content in the inert gas atmosphere is less than 20 ppmv, and the product is subjected to secondary vulcanization; the vulcanization temperature is 275 to 295 DEG C; and S2, replacement air is introduced, passivation is conducted in the air atmosphere, then the triazine perfluoroether rubber product is obtained, and the passivation temperature ranges from 275 DEG C to 295 DEG C. The method solves the problem of unstable product performance caused by improper atmosphere control in the secondary vulcanization process of the triazine perfluoroether rubber, the compression deformation rate of the perfluoroether rubber product prepared by the method is less than or equal to 10%, and the perfluoroether rubber product can be used in the high-end sealing fields of semiconductors, aerospace and the like.

The present invention relates to the use of a heat transfer composition comprising at least one refrigerant selected from the group consisting of halogenated hydrocarbons, perhalogenated hydrocarbons, fluorinated ketones, fluorinated ethers, and combinations thereof, and at least one dielectric fluid, said heat transfer composition having a volume resistivity greater than or equal to 10 6 Ω.cm at 25°C, for cooling devices, such as batteries of electric or hybrid vehicles.

The application discloses a lithium ion battery. It comprises a positive electrode sheet, a negative electrode sheet, a diaphragm and an electrolyte; wherein the positive electrode sheet comprises a positive electrode active material, the positive electrode active material is lithium iron phosphate; the electrolyte comprises a fluorinated ether solvent, a cyclic carbonate and a vinylene carbonate; the fluorinated ether solvent is a compound shown in formula I; R2 and R3 are each independently selected from an alkylene or a fluorinated alkylene, and the total number of carbon atoms of R2 and R3 is 4, the total number of fluorine atoms in R2 and R3 is m, m>0; R1 and R4 are each independently methyl or fluorinated methyl, and the total number of fluorine atoms in R1 and R4 is n, n>1; and m+n=4; the content of the cyclic carbonate is 0.5wt%-7wt%, the percentage is the percentage of the mass of the cyclic carbonate in the mass of the electrolyte. The lithium ion battery provided by the application has good high-temperature cycle performance.

The invention relates to a process for preparing TEMTP through turntable extraction, and belongs to the technical field of organic annular peroxides. According to the process, a rotating disc reactor is adopted to integrate a photocatalysis-enzyme catalysis-chemical catalysis triple synergistic system, and the problem of cross inactivation of a catalyst is solved through partition design and nano sieve membrane isolation. A peptide-guided magnetic MOF photocatalytic carrier is adopted as a core, a Fe3O4 magnetic core of the peptide-guided magnetic MOF photocatalytic carrier achieves magnetic field driving, a ZIF-8 frame loads a TiO2-Ag photocatalyst, PNIPAM temperature-sensitive hydrogel fixes halogenase, and the intelligent enzyme control characteristic is achieved. According to the method, TEMTP is taken as a raw material, a reaction is carried out under light source irradiation and magnetic field driving, extraction and purification are carried out through fluoroether HFE-7500 at normal pressure, a high-purity TEMTP product is finally obtained, and unification of reaction efficiency, selectivity and green production is achieved.

The invention discloses a lithium carbon fluoride battery electrolyte, a preparation method thereof and a lithium carbon fluoride battery, and belongs to the technical field of lithium / carbon fluoride primary batteries. The lithium carbon fluoride battery electrolyte comprises a lithium salt and a monofluoro-substituted short-chain ether solvent. Compared with a non-fluorinated ether solvent, the monofluoroether solvent has good compatibility with a carbon fluoride positive electrode and a metal lithium negative electrode, so that the battery has good discharge performance. Compared with a polyfluoro-substituted ether solvent, the monofluoro substituent group (-CH2F) obviously improves the ionic conductivity of the lithium carbon fluoride battery electrolyte at low temperature, and meanwhile, the monofluoro substituent group (-CH2F) has weak solvation energy at low temperature, so that the discharge platform of the battery at low temperature is obviously improved, and the discharge capacity of the battery is improved.

A slurry for a positive electrode, which contains a sulfur-containing positive electrode active material, a sulfide-based solid electrolyte, a binder, a first solvent and a second solvent, and wherein: the first solvent is one or more types selected from the group consisting of fluorinated ethers and fluorinated alkanes; the second solvent is one or more solvents selected from the group consisting of solvents in which values of a dispersion term [delta] d, a polarity term [delta] p, and a hydrogen bond term [delta] h in Hansen Solubility Parameters (HSP values) satisfy 14.8 < = [delta] d < = 17.5, 1.0 < = [delta] p < = 7.0, and 1.0 < = [delta] h < = 7.0, respectively.

The invention discloses a fluorinated ether electrolyte capable of being used for a magnesium metal negative electrode. The fluorinated ether electrolyte comprises magnesium salt, an organic solvent and a fluorinated ether additive, the organic solvent is an ether compound, and the volume ratio of the ether compound in the electrolyte is 80%-97%; the preparation method of the electrolyte comprises the following steps: dissolving a magnesium salt in an ether compound under the protection of inert gas, and then adding a fluorinated ether additive to obtain the electrolyte, the fluorinated ether electrolyte is applied to the magnesium ion battery. According to the electrolyte, the ether compound is adopted as the organic solvent to effectively dissolve magnesium salt and weaken the reaction of the organic solvent and magnesium ions, so that an electrode / electrolyte interface is stabilized, a solid electrolyte interface film is formed at the interface by adopting the fluorinated ether additive, and the interaction between the magnesium ions and the ether organic solvent is weakened, so that the electrolyte is more stable. The cycling stability of the magnesium battery using the material is improved; the electrolyte is simple in preparation method and high in operability.

The application discloses a lithium ion battery. The lithium ion battery comprises a positive electrode sheet, a negative electrode sheet, a diaphragm and an electrolyte; wherein the positive electrode sheet comprises a positive electrode active material, the positive electrode active material is lithium iron phosphate; the electrolyte comprises an ether solvent, the ether solvent comprises a fluorinated ether solvent and a non-fluorinated ether solvent; the fluorinated ether solvent is a compound shown in the following formula I; wherein R2 is C4 alkylene or C4 fluorinated alkylene, the number of fluorine atoms in R2 is m, m >= 0; R1 and R3 are each independently methyl or fluorinated methyl, and the total number of fluorine atoms in R1 and R3 is n, n >= 1; and m + n = 4. The lithium ion battery provided by the application has good high-temperature cycle performance and a wide electrochemical window.

This disclosure provides a method for efficiently purifying difluoromethane (HFC-32).Specifically, the present disclosure provides a method for producing a purified HFC-32, the method including:an extractive distillation step of contacting a composition containing difluoromethane (HFC-32) and a component X with a solvent A to obtain a composition containing a reduced component X from the composition,wherein the component X is at least one selected from the group consisting of pentafluoroethane (HFC-125), 1, 1, 1-trifluoroethane (HFC-143a), and dichlorodifluoromethane (CFC-12), andwherein the solvent A is at least one of an amine and a fluorinated ether.

The embodiment of the invention provides an electrolyte, a battery and a power utilization device, the electrolyte comprises a lithium salt and a non-aqueous organic solvent, the non-aqueous organic solvent comprises fluorinated carbonate and fluoro-ether, the lithium salt comprises a sulfimide lithium salt, a boron-based coordination anion lithium salt and a phosphorus-containing inorganic lithium salt, and the non-aqueous organic solvent comprises fluorinated carbonate and fluoro-ether. The electrolyte can solve the problems of high-voltage compatibility, lithium metal stability, current collector corrosion and the like under the condition of conventional lithium salt concentration, avoids the inherent problems of high cost, high viscosity, poor low-temperature performance and the like of a high-concentration electrolyte or a local high-concentration electrolyte, and has excellent compatibility with a lithium metal negative electrode.

The invention discloses a high-voltage-resistant flame-retardant electrolyte and a lithium metal battery, the high-voltage-resistant flame-retardant electrolyte comprises a lithium salt, a nitrile-based plastic crystal solvent, a diluent and an additive, the diluent is a fluorinated ether solvent and / or a fluorinated phosphazene flame retardant, and the additive comprises a fluorocarbonate solvent. According to the invention, the fluorinated / or phosphazene diluent is introduced into the nitrile electrolyte to form a solvation structure rich in anions, so that the stability of the nitrile electrolyte to a lithium metal negative electrode is improved, and meanwhile, the intrinsic characteristic of high voltage resistance and the characteristic of high safety are maintained; the problems of high viscosity and poor wettability of a high-concentration plastic nitrile electrolyte are effectively solved, the advantage of high energy density of a lithium metal battery can be effectively exerted, and meanwhile, the safety of the lithium metal battery is improved. The fluorinated solvent is used as the lithium protection additive, so that the cycle life of the lithium metal battery can be prolonged.

The object of the present invention is to provide a means capable of improving ion conductively in an electrolyte solution for lithium secondary battery.This object can be solved by an electrolyte solution for lithium secondary battery containing a lithium salt, a carbonate-based first solvent and a fluorinated ether-based second solvent, wherein the ratio of the number of moles of the fluorinated ether-based second solvent to the number of moles of the lithium atoms in the lithium salt is 0.4 or more and 2.0 or less, and the electrolyte solution for lithium secondary battery exhibits a specific profile in its Raman spectrum measured by micro-Raman spectroscopy.

A non-aqueous electrolyte power storage element according to one aspect of the present invention comprises: a positive electrode containing a sulfur-based active material; and a non-aqueous electrolyte containing an electrolyte salt, an ionic liquid, and a fluorinated solvent. The fluorinated solvent is at least one selected from the group consisting of a fluorinated ether and a fluorinated carboxylic acid ester. The total content of the ionic liquid and the fluorinated solvent with respect to all components other than the electrolyte salt in the non-aqueous electrolyte is 90 mol% or more.

This invention discloses a high-performance polymer electrolyte based on a functionalized fluorinated ether diluent and its preparation method, relating to the field of electrochemical energy storage materials technology. The high-performance polymer electrolyte comprises: a polymer matrix, a lithium salt, an organic dispersion solvent, and a functionalized fluorinated ether diluent. By introducing a fluorinated ether diluent with a specific structure, this invention synergistically regulates the crystallization behavior of the polymer matrix and the lithium-ion solvation structure, solving core problems in traditional polymer electrolytes such as low ionic conductivity, poor interfacial stability, and lithium dendrite growth. The resulting electrolyte possesses high ionic conductivity, high lithium-ion transference number, and excellent interfacial stability, making it suitable for high-energy-density lithium metal batteries.

The invention discloses a dispersion medium composition of a perfluoropolyether lithium salt electrolyte. The dispersion medium composition comprises a carbonate solvent, fluorinated ether modified multi-branched carbonate, a cosolvent and fluorobenzene modified carbonate. The dispersion medium composition of the perfluoropolyether lithium salt electrolyte is jointly formed by the substances, so that the temperature range of the electrolyte can be widened, the cold and hot safety boundary of a lithium battery is improved, and the high temperature (gt; 70 DEG C) and low temperature (lt; the out-of-control risk at-40 DEG C is reduced, the state or phase change of the battery in the use and storage process is reduced, the long-term stability is improved, and the flame-retardant safety is realized.

The object of this invention is to provide a fluorinated ether compound, a fluorinated ether composition, a coating liquid, and an article having a surface layer with excellent fingerprint removal and finger slipperiness, and a method for manufacturing the same. A fluorinated ether compound is represented by formula (1) or formula (2). {(R f1 -A 1 -) p1 Si(-R) 1 ) 3‑p1} q1 -Q 1 (-T) n1 (-R) f2 ) r1 Equation (1). {(R) f1 -A 1 -) p2 Si(-R) 1 ) 3‑p2} q2 -Q 2 (-T) n2 -R f3 -Q 3 (-T) n3 {-Si(-R) 2 ) 3‑p3 (-A) 2 -R f1 ) p3} q3 Equation (2). The symbols in the equation are as described in the instruction manual.

Localized high-salt concentration electrolytes, each containing a salt, an ethylene glycol ether as a solvent, and a fluorinated diluent. In certain embodiments, the ethylene glycol ether has the chemical formula R1-(O-CH2-CH2) n -O-R2, where n = 1 to 4 and at least one of R1 and R2 is a hydrocarbon side chain having at least 2 carbon atoms and where the salt is soluble in the ethylene glycol ether. In certain embodiments, the fluorinated diluent is selected from the group consisting of fluorinated ethylene glycol ethers and fluorinated ethers. In certain embodiments, the salt includes an alkali metal salt. In certain embodiments, the salt includes an alkaline earth metal salt. The salt may include a perfluorosulfonimide salt. Also disclosed is an electrochemical device including the localized high-salt concentration electrolyte of the present disclosure.

[Problem] The purpose of the present invention is to provide a means capable of improving ionic conductivity in an electrolyte solution for a lithium secondary battery. [Solution] An electrolyte solution for a lithium secondary battery, which contains a lithium salt, a carbonate-based first solvent, and a fluorinated ether-based second solvent, and which is characterized in that: the ratio of the number of moles of the fluorinated ether-based second solvent to the number of moles of lithium atoms contained in the lithium salt is 0.4-2.0 (inclusive); the electrolyte solution for a lithium secondary battery shows a predetermined profile in a Raman spectrum measured by microscopic Raman spectroscopy.