60 results about "Methyl carbonate" patented technology

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.

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.

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.

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.

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a composition of a positive electrode active material and an electrolyte for a lithium ion battery, which comprises lithium iron phosphate positive electrode active material particles and a non-aqueous electrolyte, the lithium iron phosphate positive electrode active material particles comprise a lithium iron phosphate matrix with an olivine structure, a conductive carbon phase dispersed in the lithium iron phosphate matrix and an inorganic lithium ion conductor shell layer continuously wrapping the outer surface of the lithium iron phosphate matrix; the inorganic lithium ion conductor shell layer comprises one or more of Li3PO4, Li2SiO3, LiAlPO4 and a solid solution of Li3PO4, Li2SiO3 and LiAlPO4; the non-aqueous electrolyte comprises an organic carbonate solvent, a lithium salt and a high-temperature stable additive; the organic carbonate solvent comprises ethylene carbonate, ethyl methyl carbonate and fluoroethylene carbonate; the lithium salt comprises lithium hexafluorophosphate and lithium difluorophosphate and / or lithium difluoro (oxalato) borate; the high-temperature stable additive is an organophosphate compound.

The invention discloses an alkali metal secondary battery electrolyte easy to store at normal temperature and a battery containing the electrolyte, the electrolyte comprises a main salt, a non-aqueous solvent and an additive composition, the main salt is selected from a main lithium salt or a main sodium salt; the additive composition comprises a silyl dicarboxylate compound which is used as a first additive and at least comprises a structure shown in (I) and a compound which is used as a second additive and has a structure shown in (II-A), (II-B) or (II-C), and the specific structure is shown in the specification. The electrolyte prepared from the additive composition disclosed by the invention can be used for inhibiting a polymerization reaction caused by attacking solvent molecules such as ethylene carbonate (EC) and methyl ethyl carbonate (EMC) by a byproduct PF5 generated after the reaction of a silane-based dicarboxylate compound and Li / NaPF6; and meanwhile, the effective effect generated by the main reaction of the silyl dicarboxylate compound and Li / NaPF6 in the electrolyte is not influenced, the problem of color change after the electrolyte is stored can be solved, and meanwhile, the high-temperature storage and cycle performance of the battery is improved.

The application discloses a kind of composite solid-state polymer electrolyte and preparation method and application thereof.A kind of composite solid-state polymer electrolyte, preparation raw material includes trifluoromethanesulfonylimide lithium, polyvinylidene fluoride-hexafluoropropylene and modified cellulose derivative;Modified cellulose derivative is obtained by modification of organic modifier to cellulose derivative;Organic modifier includes at least one of N, N-dimethylformamide, dimethyl sulfoxide, ethylene carbonate, propylene carbonate, dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate, 1,2-dimethoxyethane.The composite solid-state polymer electrolyte of the application has high ionic conductivity, wide electrochemical window, excellent cycle performance of solid-state polymer electrolyte, and the highest stable value of electrochemical window can reach 4.8V.The interaction between modified cellulose derivative and LiTFSI, PVDF-HFP is stronger under high salt system, and the obtained system has higher electrochemical stability.

This disclosure provides a battery cell, a battery device, and an electrical device. The battery cell includes a casing and an electrode assembly located within the casing. The electrode assembly includes a positive electrode, a negative electrode, and a separator. The separator is located between the positive and negative electrode. The negative electrode includes a negative current collector and a negative electrode film layer located on at least one side of the negative current collector. The porosity of the negative electrode film layer is 20-35%. The negative electrode film layer includes a negative electrode active material, which includes silicon-based materials and carbon-based materials. The mass percentage of Si element in the negative electrode film layer is 1-10%, and the volume distribution particle size Dv50 of the negative electrode active material is 10-20 μm. The battery cell includes an electrolyte, which includes an organic solvent and an electrolyte salt. The organic solvent includes ethyl methyl carbonate, and the mass percentage of ethyl methyl carbonate in the organic solvent is greater than or equal to 55% and less than 100%. The battery cell exhibits both high energy density and good low-temperature cycling performance.

An electrolyte. The electrolyte comprises a fluorine-containing ester additive. The ratio of the fluorine-containing ester additive in the electrolyte is 2-9% by mass percentages. The fluorine-containing ester additive comprises 2,2-difluoroethyl acetate, difluoroethylene carbonate and trifluoroethyl methyl carbonate.

Battery cell, characterized in that it comprises the following: a cathode foil and an anode foil arranged in a cascade; wherein the cathode foil comprises a cathode collector and a cathode film layer arranged on the surface of at least one side of the cathode collector; wherein the cathode film layer comprises a lithium-containing phosphate with an olivine structure, wherein the lithium-containing phosphate with an olivine structure comprises a carbon-coated lithium iron phosphate material, wherein the carbon-coated lithium iron phosphate material comprises a lithium iron phosphate substrate and a carbon coating layer arranged on the surface of the substrate; wherein the carbon-coated lithium iron phosphate material has a carbon coating factor η = BET 1 BET 2 exhibits, wherein BET1 is the specific surface area of ​​a mesopore and macropore structure of the carbon-coated lithium iron phosphate, and wherein BET2 is the total specific surface area of ​​the carbon-coated lithium iron phosphate material, satisfying η 0.81 ≤ η ≤ 0.95. wherein the battery cell comprises an electrolyte solution, wherein the electrolyte solution comprises a solvent, wherein the solvent comprises ethylene carbonate and dimethyl carbonate.

The invention discloses a preparation method of methanesulfonic acid-2-propyn-1-ol, which comprises the following steps: adding propargyl alcohol, methylsulfonyl chloride and triethylamine into an organic solvent, reacting to generate a reaction solution containing a methanesulfonic acid-2-propyn-1-ol crude product, the organic solvent comprising diester carbonate and acetate; or propargyl alcohol, methylsulfonyl chloride and triethylamine are added into an organic solvent to react to generate a reaction solution containing a methanesulfonic acid-2-propargyl-1-alcohol crude product, and the organic solvent comprises any one or any combination of more than one of dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate or ethyl acetate; filtering and concentrating the reaction liquid to obtain a crude product of the methanesulfonic acid-2-propyn-1-ol; and carrying out molecular distillation on the methanesulfonic acid-2-propyn-1-ol crude product, so as to obtain the methanesulfonic acid-2-propyn-1-ol.

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

The invention relates to the related technical field of lithium batteries, and particularly discloses a high-entropy electrolyte of a lithium metal battery, a preparation method and application, the high-entropy electrolyte comprises lithium fluoride and an organic solvent, and the organic solvent comprises high-polarity ethylene carbonate. The lithium ion battery also comprises lithium bis (oxalato) borate, lithium hexafluorophosphate, lithium bis (trifluoromethanesulfonyl) imide, lithium bis (fluorosulfonyl) imide, lithium difluoro (oxalato) borate and lithium nitrate, wherein the total molar concentration of lithium ions is 1 mol / L; the solvent further comprises methyl ethyl carbonate and dimethyl carbonate. Compared with a low-entropy electrolyte, the high-entropy electrolyte shows excellent regulation and control capability in interface chemistry and solvation chemistry and is compatible with high ionic conductivity and low desolvation potential barrier, the cycling stability of the lithium metal battery is remarkably improved, and the service life of the lithium metal battery is remarkably prolonged.

The application provides a high-safety high-conductivity electrolyte as well as a preparation method and application thereof, and relates to the technical field of lithium batteries.The raw materials of the electrolyte include a lithium salt, an organic solvent and a flame retardant, the flame retardant includes hexa (2, 2, 2-trifluoroethoxy) cyclotriphosphazene and 2, 2, 3, 3-tetrafluoropropyl methyl carbonate with a mass ratio of 1:2-3, and the mass percentage of the flame retardant in the raw materials is 5-12%. The electrolyte can not only solve the flammable problem of traditional electrolytes, improve the flame retardant performance and safety of the electrolyte, but also improve the ionic conductivity, prolong the cycle life of the battery under high temperature, and improve the high-temperature stability of the battery.

The application provides a wide-temperature lithium ion battery electrolyte and a lithium ion battery thereof, wherein the lithium ion battery electrolyte comprises a lithium salt, a nonaqueous organic solvent and an additive; the nonaqueous organic solvent comprises a first carbonate, a second carbonate, a third carbonate, a fourth carbonate and a carboxylic acid ester; the first carbonate is dimethyl carbonate and the volume percentage is 39-51%; the second carbonate is propylene carbonate and the volume percentage is 10-15%; the third carbonate is ethylene carbonate and the volume percentage is 8-15%; the fourth carbonate is methyl ethyl carbonate and / or diethyl carbonate and the volume percentage is 8-10%; and the carboxylic acid ester is one or more of propyl acetate, propyl propionate and ethyl propionate and the volume percentage is 19-26%. On the basis of the synergistic effect of dimethyl carbonate and propylene carbonate, the addition of ethylene carbonate, the fourth carbonate and the linear carboxylic acid ester can make the lithium ion battery have better high and low temperature performance.

The present disclosure provides a "battery electrolyte". In one aspect of the present disclosure, an electrode assembly is presented. The electrode assembly includes: a positive electrode; a negative electrode; a separator positioned between the positive electrode and the negative electrode; and an electrolyte. The electrolyte comprises lithium hexafluorophosphate, lithium bis (fluorosulfonyl) imide, fluoroethylene carbonate, vinylene carbonate and an additive which are dissolved in a solvent of ethylene carbonate and ethyl methyl carbonate. The electrolyte saturates the negative electrode, the positive electrode, and the separator. In particular, the present invention relates to an electrode assembly for a lithium ion secondary battery, the electrode assembly comprising an electrode assembly comprising an electrolyte and an additive, the additive being (S)-N-(1-(2-((4-(3-(trifluoromethyl) phenyl) piperazin-1-yl) methyl) pyrrolidin-1-yl)-3, 3-dimethyl-1-oxobutan-2-yl)-3-methyl-2-(2-oxo-1, 3-diazaspiro [4.5] decane-1-yl) butyramide, thereby facilitating improved performance and stability of the electrode assembly.

In one aspect of the disclosure, an electrode assembly is presented. The electrode assembly includes a positive electrode, a negative electrode, a separator positioned between the positive and negative electrodes, and an electrolyte. The electrolyte comprises lithium hexafluorophosphate, lithium bis(fluorosulfonyl)imide, fluoroethylene carbonate, vinylene carbonate, and an additive, dissolved in a solvent of ethylene carbonate and ethyl methyl carbonate. This electrolyte saturates the negative electrode, the positive electrode, and the separator. The additive is (S)-N-(1-(2-((4-(3-(Trifluoromethyl)phenyl)piperzin-1-yl)methyl)pyrrolidin-1-yl)-3,3-dimethyl-1-oxobutan-2-yl)-3-methyl-2-(2-oxo-1,3-diazaspier[4.5]decan-1-yl)butanamide, which contributes to improved performance and stability of the electrode assembly.

The invention discloses a preparation process of trimethylene carbonate, which comprises the following steps: reacting PDO with DMC under the catalysis of lipase to generate 3-hydroxypropyl methyl carbonate and C, C '-1, 3-propanediyl, C, C'-dicarboxylic acid carbonate; or reacting PDO with DMC under the catalysis of a molecular sieve to generate C, C '-1, 3-propanediyl and C, C'-dicarboxylic acid carbonate; then, the C, C '-1, 3-propanediyl and C, C'-dicarboxylic acid carbonate is converted into 3-hydroxypropyl methyl carbonate under enzyme catalysis or non-enzyme catalysis, and trimethylene carbonate is prepared through thermal cyclization of the 3-hydroxypropyl methyl carbonate. The method has the obvious advantages of wide raw material source, low price and the like. Compared with a technology for preparing trimethylene carbonate by catalyzing reaction of PDO and DMC by using lanthanum 2-ethylhexanoate as a catalyst, the method disclosed by the invention has higher safety and economical efficiency and has very important industrial application prospects.

Battery cell comprising an electrode assembly and an electrolyte, wherein the electrode assembly comprises a positive electrode and a negative electrode; wherein the positive electrode comprises a positive current collector and a positive electrode coating arranged on at least one side of the positive current collector; wherein the positive electrode coating contains a positive active material and the one-sided coating weight of the positive electrode coating is 0.36 g / 1540.25 mm² 2 up to 0.43 g / 1540.25 mm 2 amounts; wherein the negative electrode comprises a negative current collector and a negative electrode coating arranged on at least one side of the negative current collector, wherein the negative electrode coating comprises a negative active material and the one-sided coating weight of the negative electrode coating is 0.17 g / 1540.25 mm 2 up to 0.21 g / 1540.25 mm2 amounts; wherein the electrolyte comprises carbonate solvents, wherein the carbonate solvents contain ethyl methyl carbonate, and wherein the mass fraction of ethyl methyl carbonate is 24% to 51% based on the mass of the electrolyte.

The application provides a diaphragm and a preparation method thereof, a secondary battery and an electric device, wherein the diaphragm comprises a base film and a ceramic coating arranged on at least one surface of the base film, the ceramic coating comprises a binder and inorganic particles, and the swelling degree of the diaphragm is 0.1% to 6% after being soaked in an organic solvent for 24 hours, the organic solvent is a mixed solvent of ethylene carbonate, dimethyl carbonate and diethyl carbonate, and the mass ratio of ethylene carbonate, dimethyl carbonate and diethyl carbonate in the mixed solvent is 2:2:1. The diaphragm has the characteristics of good thermal stability, low impedance and ceramic coating not easy to fall off, and has a wide application prospect.

The invention discloses a sodium metal battery electrolyte used under high voltage and a preparation method and application thereof, and belongs to the technical field of sodium metal batteries. The sodium metal battery electrolyte comprises sodium salt, cyclic carbonate, chain carbonate and fluorocarboxylate, wherein the concentration of the sodium salt is 0.5-1.5 mol / L, and the mass ratio of the cyclic carbonate to the chain carbonate to the fluoro carboxylic ester is (0.3-0.35): (0.4-0.55): (0.1-0.3); the sodium salt is one of sodium hexafluorophosphate and sodium bis (fluorosulfonyl) imide, the cyclic carbonate is fluoroethylene carbonate, the chain carbonate is ethyl methyl carbonate (EMC), and the fluorocarboxylic ester is one of ethyl 2, 2-trifluoroacetate, methyl 3, 3, 3-trifluoropropionate, ethyl 3, 3, 3-trifluoropropionate, methyl 4, 4, 4-trifluorobutyrate, ethyl 4, 4, 4-trifluorobutyrate and methyl perfluorobutyrate. Through the combined design of fluoroethylene carbonate (FEC), chain carbonate and fluorocarboxylate, an advanced electrolyte system is constructed together, and the electrolyte has excellent performance of high rate performance and long-term cycle stability at the same time under high voltage.

This application provides a method for efficient alkaline separation of low-grade tungsten-tin ore, comprising: placing a mixture of sodium hydroxide solution and low-grade tungsten-tin ore in a high-pressure reactor for pressurized and heated leaching; after leaching, cooling and filtering to obtain detungsten-removed slag and leachate; performing countercurrent extraction of the leachate using an extractant, wherein the oil-water ratio of the leachate to the extractant is 1 / 10 to 1 / 1; and obtaining a loaded organic phase and raffinate after phase separation, wherein the extractant comprises: 10-40 wt% methyl carbonate quaternary ammonium salt, 5-15 wt%... Isooctyl alcohol or 2-octanol (wt%) was used as a phase modifier and kerosene as a diluent. The loaded organic phase was first washed countercurrently with 5-30 g / L sodium hydroxide solution, and after phase separation, the washed organic phase and washing solution were obtained. The washed organic phase was back-extracted with a mixed solution of 1-4 mol / L ammonium bicarbonate and 0.5-3 mol / L ammonia water to obtain a back-extraction solution, wherein the oil-water ratio was 10 / 1-30 / 1. The back-extraction solution was de-oiled using resin. The de-oiled back-extraction solution was directly evaporated and crystallized to obtain ammonium paratungstate product and crystallization mother liquor.

This application relates to a battery and an electrical device. The battery includes a positive electrode, a negative electrode, a separator, and an electrolyte; the positive electrode active material layer includes aluminum; the separator includes an oxide solid electrolyte coating; the electrolyte includes a solvent, an additive, and a lithium salt; the solvent includes a first solvent and a second solvent; the additive includes a first additive and a second additive; the first solvent includes propylene carbonate and / or ethylene carbonate, and the second solvent includes ethyl 2,2-difluoroacetate and / or trifluoroethyl methyl carbonate; the first additive includes mannitol sulfate, and the second additive includes ethylene sulfate; 0.08≤(A+C+D)×10000 / X≤0.77; 0.05≤(C+D)×100 / (B+W)≤2.77; 3.23≤(C+H) / B≤63.97. The solution provided in this application results in a battery exhibiting excellent thermal shock safety and high and low temperature cycling performance.