52 results about "Trimethyl phosphate" patented technology

The invention discloses a special gradient flame-retardant explosion suppressant for a high-energy-density ternary lithium battery, and relates to the technical field of safety protection of new energy batteries, the gradient flame-retardant explosion suppressant comprises the following components by mass: 30% of trimethyl phosphate, 16% of dimethyl methylphosphonate, 13% of triphenyl phosphate, 32% of a solvent, and 9% of a composite stabilizer; the compound stabilizer is prepared from 2, 6-di-tert-butyl-4-methylphenol, diisooctyl adipate and dibutyl sebacate according to the mass ratio of 2 to 1 to 1. The invention also provides a preparation method of the gradient flame-retardant explosion suppressant. Through formula optimization, especially adjustment of the composite stabilizer and reinforcement of a raw material pretreatment process, the explosion suppressant can be stably stored and operated within the range of-40 DEG C to 50 DEG C, the application limitation in extremely cold and high-temperature areas is solved, and the explosion suppressant is suitable for most of extreme temperature environments in the world.

The invention relates to a composite solid electrolyte and a preparation method thereof, the composite solid electrolyte comprises: a lithium zirconium phosphate (LZP) oligomer: a chain nanocluster with a polymerization degree of 5-10, the surface of which is modified by trimethyl phosphate (TMP) to form a phosphate group; a polymer matrix, namely PVDF-HFP; the lithium salt is lithium bis (trifluoromethanesulfonimide) LiFSI or LiDFOB, and the molar ratio of the lithium salt to the polymer repeating unit is (1: 8)-(1: 12); wherein the LZP oligomer and a-CF2 group of the PVDF-HFP form a hydrogen bond through a phosphate group of the TMP, and the LZP oligomer and the-CF2 group of the PVDF-HFP interact with each other through a dipole, so that molecular-level interface bonding is realized; the LZP oligomer constructs a continuous three-dimensional ion channel in the electrolyte, and the dielectric constant is 60-80; the electrolyte forms a film at 60 DEG C or below by a solution casting method.

The invention relates to a sodium ion battery and a phosphate flame-retardant electrolyte thereof. The electrolyte solution includes: a solvent including trimethyl phosphate (TMP) and hydrofluoroether; a sodium salt; and an additive containing sodium tetrakis (3, 5-bis (trifluoromethyl) phenyl) borate. The electrolyte is low in cost, high in safety, good in interface compatibility and excellent in electrochemical performance.

The invention discloses a sodium-ion battery electrolyte and a preparation method thereof, and relates to the technical field of sodium-ion batteries, the electrolyte comprises a sodium salt, a composite solvent, an additive and an auxiliary agent, the sodium salt is formed by compounding sodium bis (fluorosulfonyl) imide, sodium bis (trifluoromethanesulfonyl) imide and modified sodium bis (oxalato) borate, and the composite solvent is formed by compounding sulfolane, 1, 3-butanediol, 1, 3-butanediol, 1, 3-butanediol, 1, 3-butanediol, 1, 3-butanediol, 1, 3-butanediol, 1, 3-butanediol, 1, 3-butanediol and 1, 3-butanediol. The auxiliary agent is nano-scale ZIF-8, the additive is 1, 3-propylene glycol dimethyl ether, dimethyl carbonate, fluoroethylene carbonate and ethyl acetate, the additive is modified 1, 3-propane sultone, trimethyl phosphate and hydroquinone dimethyl ether, and the auxiliary agent is nano-scale ZIF-8. According to the electrolyte, sodium bis (oxalato) borate is modified after being treated by hydrogen peroxide and has efficient hydrofluoric acid resistance, meanwhile, hydrofluoric acid generated by the reaction of fluorine-containing sodium salt and water in the electrolyte can be specifically removed by utilizing an auxiliary agent of the nano ZIF-8 and a synergistic effect formed by the sodium salt and the auxiliary agent, and damage of the hydrofluoric acid to a negative electrode SEI film is avoided; and the cycle life of the sodium ion battery is prolonged.

The invention relates to the technical field of lithium ion batteries, and discloses a high-safety semi-solid lithium battery, which comprises a positive electrode, a negative electrode, a diaphragm and a semi-solid electrolyte, the electrolyte is prepared from trimethyl phosphate, lithium bis (fluorosulfonyl) imide, cyanoethyl cellulose, a cation competitive coordination agent and an optional interface regulator; the solvation structure is regulated and controlled by utilizing a cation competitive coordination mechanism, the activity of a free solvent is reduced, and the problem of poor compatibility of phosphate and a negative electrode is solved; based on thermal reversible physical crosslinking characteristics of cyanoethyl cellulose and cations, the problem of large contact impedance between solid phases and solid phase interfaces is solved by adopting a process of high-temperature low-viscosity liquid injection infiltration and room-temperature in-situ curing molding; meanwhile, uniform deposition of lithium is induced by virtue of an electrostatic shielding effect of multivalent cations, dendritic crystal growth is inhibited, the battery has intrinsic flame-retardant characteristic, interface stability and long cycle life, and the technical problem of a high-energy battery is solved.

The invention relates to the technical field of plastic film production and processing, in particular to a flame-retardant BOPET film which comprises a BOPET base film. The BOPET base film is prepared from the following raw materials: a flame-retardant toughening agent; the flame-retardant toughening agent is prepared by taking terephthalic acid, ethylene glycol, antimony trioxide, trimethyl phosphate and a functional flame-retardant polymer as raw materials; the functional flame-retardant polymer is phosphate with a composite phosphorus structure. According to the flame-retardant BOPET film provided by the invention, the flame-retardant toughening agent is introduced into the base film, so that the flame-retardant property of the BOPET film can be remarkably improved under the condition of keeping good mechanical properties, and the requirements of high-end electronic and electrical and new energy automobile interior lamp scenes on safety materials are met.

The invention discloses a surface protection layer of an ultrathin lithium strip as well as a preparation method and application of the surface protection layer, and belongs to the technical field of lithium batteries. The surface protection layer is formed after lithium metal reacts with a composite additive, and the composite additive is composed of solid powder and an organic solvent; wherein the solid powder is selected from one or more of dialkyl dithiophosphate or metal fluoride; the organic solvent is selected from any one of dimethyl sulfoxide, formamide, butyrolactam, acetone, 1, 4-dioxane, tetrahydrofuran, trimethyl phosphate, triethyl phosphate and propylene carbonate. The electrochemical performance of the produced lithium strip with the surface protection layer is remarkably improved, large-scale production can be achieved on the premise that existing equipment is not transformed and technological processes are not increased by means of the preparation method, the technical advantages in cost and technology are achieved, and therefore the lithium strip with the surface protection layer has a good application prospect. The surface protection layer of the ultrathin lithium strip and the preparation method of the surface protection layer have good application prospects.

The application discloses a kind of sodium ion battery electrolyte and preparation method thereof, it is related to sodium ion battery technical field, the electrolyte includes: sodium salt, composite solvent, additive and auxiliary agent, the sodium salt is sodium difluorosulfurylimide, sodium bis-trifluoromethanesulfonimide and modified sodium borate dihydroxide dioxalate compound composition, composite solvent is sulfolane-1,3-propanediol dimethyl ether, dimethyl carbonate, fluoroethylene carbonate and ethyl acetate, additive is modified 1,3-propane sulfone lactone, trimethyl phosphate and hydroquinone dimethyl ether, auxiliary agent is nano ZIF-8.This electrolyte sodium borate dihydroxide dioxalate is modified after hydrogen peroxide treatment, with high-efficiency anti-hydrofluoric acid capacity, while using the auxiliary agent of nano ZIF-8, sodium salt and auxiliary agent form synergistic effect can be targeted to remove hydrogen fluoride sodium salt and moisture reaction generated in electrolyte hydrofluoric acid, avoid the damage of hydrofluoric acid to negative electrode SEI film, and then improve the cycle life of sodium ion battery.

An electrolyte and a lithium-ion battery using same. The electrolyte comprises a first additive; the mass ratio of the first additive in the electrolyte is 2.5-5.5%; the first additive comprises trimethyl phosphate and pentafluoro ethoxy cyclotriphosphazene; upon calculation, the mass ratio of trimethyl phosphate to pentafluoro ethoxy cyclotriphosphazene is equal to 0.5-2:2-3.5.

The invention provides a cationic epoxy adhesive for electronic three-proofing and a preparation method thereof, and belongs to the technical field of adhesives. According to the invention, alicyclic epoxy resin is fluorinated and modified with silane, so that moisture resistance, corrosion resistance and mechanical properties are enhanced; 3-mercaptopropyltrimethoxysilane is grafted to polydimethylsiloxane through ultraviolet, so that the compatibility of the polydimethylsiloxane is improved, and the toughness of the polydimethylsiloxane is improved; hyperbranched polyester reacts with trimethyl phosphate to endow the material with flame retardance and metal adhesion; the microencapsulated slow-release curing agent solves the problem of insufficient ultraviolet curing deep layer, and realizes uniform curing of the surface layer and the deep layer; according to the invention, ultraviolet and natural curing are combined, rapid shaping and deep curing are considered, the processing efficiency, mechanical properties and chemical stability of the material are obviously optimized, and various requirements of electronic three-proofing and high-performance materials are met.

The application provides a polyester fiber composite hot melt batting, a preparation method thereof and a quilt. The preparation method comprises the following steps: S1. mixing diacid, dihydric alcohol and antimony trioxide, and performing esterification reaction in a protective gas atmosphere, dehydration, adding trimethyl phosphate, and performing polycondensation reaction; the diacid comprises terephthalic acid, isophthalic acid and adipic acid, and the dihydric alcohol comprises diethylene glycol and ethylene glycol; the melt is extruded, cooled, and cut into pieces; the modified polyester piece is vacuum dried and then melt-spun and stretched; S2. the modified polyester fiber is made into a fiber web together with polyester fiber and cotton fiber; S3. three layers of the fiber web are stacked and hot-pressed, and the molten modified polyester fiber bonds the three layers of the fiber web together to form a batting. The batting is safe and environmentally friendly, and the problem of environmental pollution caused by the use of adhesive in the preparation process of the synthetic batting in the prior art is avoided.

The application provides a reaction device and method for continuously synthesizing trimethyl phosphite, and belongs to the technical field of trimethyl phosphite synthesis. The reaction device comprises a raw material tank group, a composite reaction kettle, a solvent tank, a pre-cooler, a water washing kettle, an alkali liquid buffer tank, a layered system and a rectification system. The raw material tank group comprises a methanol tank and a phosphorus trichloride tank. The raw material tank group and the solvent tank are connected with the composite reaction kettle through pipelines via the pre-cooler, and the composite reaction kettle is connected with the water washing kettle through a pipeline. The phosphorus trichloride drop-like feed is efficiently converted into a uniform liquid film by a centrifugal disc, and then the liquid film is converted into a fine jet flow by a spraying ring. The fine jet flow is instantaneously and highly intensively sheared with a strong vortex-shaped methanol / solvent flow formed through a tangential feeding pipe. The secondary intensified mixing mode replaces the macroscopic mixing limitation of a traditional stirred tank, realizes instant and uniform mixing of materials at a micro level, thereby inhibiting a side reaction and effectively improving a reaction rate.

The invention discloses a PEST-SUS304 composite material as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. The preparation method comprises the following steps: mixing terephthalic acid, isophthalic acid and antimony trioxide to prepare slurry I, and mixing ethylene glycol and trimethyl phosphate to prepare slurry II; introducing nitrogen into a reaction kettle for replacement, respectively adding the slurry I and the slurry II, stirring, and carrying out esterification reaction to obtain an esterification primary product; heating the esterification reaction product for pre-polycondensation, then adding pretreated sodium terephthalate sulfonate for final polycondensation, and then granulating to obtain the PEST polyester chip. The preparation method comprises the following steps: performing crystallization drying, melt extrusion, sheet casting, longitudinal stretching and transverse stretching on PEST polyester chips to prepare a PEST polyester film; and the PEST polyester film and the 304 stainless steel foil are subjected to heat sealing to prepare the PEST-SUS304 composite material. Compared with a traditional laminated iron composite material formed by compounding PET, the heat sealing strength of the PEST-SUS304 composite material is remarkably improved.

This invention provides a low-temperature electrolyte, its preparation method, and its application, belonging to the field of sodium battery technology. The low-temperature electrolyte provided by this invention comprises a basic electrolyte and NaPO₂F₂. The basic electrolyte includes NaPF₆, trimethyl phosphate (trimethyl silyl) ester, ethylene carbonate, propylene carbonate, and methyl ethyl carbonate; the mass ratio of NaPO₂F₂ to the basic electrolyte is 0.5:100 to 1.5:100; by mass percentage, ethylene carbonate accounts for 25-45%, propylene carbonate for 5-25%, methyl ethyl carbonate for 40-65%, and trimethyl phosphate (trimethyl silyl) ester for 0.5%-5%; the concentration of NaPF₆ in the basic electrolyte is 0.5 mol / L to 1 mol / L. The low-temperature electrolyte provided by this invention improves upon the slow desolvation process and unstable interfacial film formed by traditional carbonate-based electrolytes at low temperatures, and significantly improves the low-temperature discharge efficiency of sodium-ion batteries.

The invention discloses a preparation method of a flame-retardant electrolyte-containing electrolyte for a lithium ion battery, a commercial electrolyte is taken as a core, and a phosphorus flame retardant is added, so that the safety and reliability of the lithium ion battery in the use process are improved. The flame-retardant electrolyte comprises the following raw materials: triphenyl phosphate, triethyl phosphate and a commercial electrolyte. The preparation method comprises the following steps: respectively adding phosphorus flame retardants triphenyl phosphate and trimethyl phosphate into a commercial electrolyte according to different proportions, adding the composite electrolyte material to prepare a complete lithium ion battery, and carrying out electrochemical performance detection and safety performance detection on the lithium ion battery. According to the flame-retardant electrolyte provided by the invention, the flammability of the electrolyte of the lithium ion battery is reduced, the safety performance of the lithium ion battery is improved, and the flame-retardant electrolyte is suitable for the production environment of most lithium ion batteries.

The invention relates to the technical field of tail gas treatment, and discloses a tail gas deodorization device for trimethyl phosphate production, the tail gas deodorization device comprises a reaction tower, the reaction tower is internally provided with a plurality of catalytic reaction assemblies, the upper side of each catalytic reaction assembly is provided with a spray pipe, each catalytic reaction assembly comprises a fixed seat, and the fixed seat is provided with a spray pipe; the fixed seat is fixedly connected with the reaction tower, and a first catalyst storage seat and a second catalyst storage seat which are through up and down are arranged in the fixed seat; and the first catalyst storage seat is positioned on the upper side of the second catalyst storage seat. According to the invention, the first catalyst storage seat is provided with the vent hole with a larger diameter, correspondingly, the second catalyst storage seat is provided with the plurality of vent pipes which have smaller diameters and are staggered with the vent hole, and the exhaust gas can more conveniently pass through the plurality of catalytic reaction components to reach the gas outlet due to the existence of the vent hole and the vent pipes.

The invention provides a flame-retardant electrolyte additive for a power battery and a preparation process, and relates to the technical field of material processing, the additive comprises trimethyl phosphate, fluorinated phosphate, ethylene carbonate, a borate compound, a surfactant, a silane coupling agent and nano oxide particles, the addition proportion of trimethyl phosphate is 8-20%, the addition proportion of fluorinated phosphate is 10-20%, and the addition proportion of fluorinated phosphate is 10-20%. The addition proportion of the trimethyl phosphate is 12%-28%, the addition proportion of the ethylene carbonate is 18%-32%, the nano oxide particles account for 1%-4% of the total mass of the additive, and the particle size is 20-40 nanometers. According to the invention, the specific proportioning relation of the trimethyl phosphate and the fluorinated phosphate and the specific proportioning relation of the ethylene carbonate and the boric acid ester compound are accurately regulated and controlled; the high-purity flame-retardant component raw materials are matched, so that the synergistic flame-retardant effect of the flame-retardant components is ensured, the flame-retardant effect of the electrolyte is remarkably improved, and the viscosity of the additive can be strictly controlled within a reasonable range.

The invention discloses a dianion salt-based magnesium fuel cell electrolyte and a preparation method, and belongs to the technical field of magnesium fuel cells, the electrolyte is composed of dianion composite magnesium salt, propylene carbonate (PC), tetrahydrofuran (THF), magnesium fluoride (MgF) nanoparticles, 1, 3-dioxolane (DOL), diethylene glycol dimethyl ether (G2) and trimethyl phosphate (TMP) according to a specific mass percentage, and the dianion salt-based magnesium fuel cell electrolyte is prepared from dianion composite magnesium salt, propylene carbonate (PC), tetrahydrofuran (THF), magnesium fluoride (MgF) nanoparticles, 1, 3-dioxolane (DOL), diethylene glycol dimethyl ether (G2) and trimethyl phosphate (TMP) according to a specific mass percentage. The mass ratio is 1: (1.6-2.0). The preparation method comprises the four steps of composite salt preparation, solvent dehydration, salt dissolution and additive mixing, and the ionic conductivity and thermal stability of the electrolyte are improved through specific ultrasonic parameters, dehydration conditions and annealing treatment.

The invention provides a method for reducing moisture of an addition liquid in glyphosate synthesis. The method comprises the following steps: carrying out a depolymerization reaction on paraformaldehyde and a catalyst A in methanol to obtain a depolymerization liquid; adding glycine, methanol and triethylamine into the depolymerization liquid for catalytic reaction to obtain addition liquid; trimethyl phosphite is added into the addition liquid, a hydrolysis reaction is carried out, and water in addition is consumed; after reacting for a period of time, supplementing dimethyl phosphite and triethylamine to obtain a condensation solution; and adding hydrochloric acid into the condensation liquid for acidolysis to remove chloromethane, hydrogen chloride, water or other light components, cooling, adding alkali to adjust pH, crystallizing, filtering and drying to obtain glyphosate. Hydrolyzate dimethyl phosphite and methanol can be applied to the next step of reaction, so that the consumption of dimethyl phosphite and methanol in the condensation reaction is reduced; the side reaction is reduced, the glyphosate yield is increased by 6% compared with that of the prior art, and the glyphosate content reaches 98.5% or above.

The invention relates to the technical field of electrolytes, in particular to a dianion salt magnesium fuel cell non-aqueous electrolyte which is composed of the following components: composite salt, a mixed solvent, magnesium fluoride (MgF) nanoparticles, 1, 3-dioxolane (DOL), diethylene glycol dimethyl ether (G2) and trimethyl phosphate (TMP). According to the invention, a composite salt system composed of magnesium trifluoromethanesulfonate and magnesium bis (trifluoromethanesulfonyl) imide is adopted, and the ion transmission capability of the electrolyte is significantly improved through a dianion synergistic effect.

The invention relates to a low-temperature disinfectant and a production method thereof. The production method comprises the following steps: (1) preparing a sodium chloride aqueous solution with the concentration greater than or equal to 20wt%; (2) preparing a ruthenium iridium titanium electrode; (3) electrolysis: electrolyzing the sodium chloride aqueous solution in an electrolytic bath by adopting a ruthenium-iridium-titanium electrode; (4) mixing: adding an organic solvent and trimethyl phosphate into the liquid storage tank, and uniformly mixing with the disinfectant to form a mixed solution; and (5) cooling: reducing the temperature of the mixed solution to-20 DEG C to-40 DEG C by using a refrigerator, so that the sodium chloride salt is separated out from the mixed solution, and the low-temperature disinfectant is obtained. The low-temperature disinfectant provided by the invention can not be frozen for a long time under extremely cold conditions in winter in northern areas; a large number of crystals can be separated out in the preparation process, the corrosion probability of disinfected objects is reduced, and the low-temperature disinfectant saves cost and is suitable for industrial large-scale production.

An embodiment provides: a composition for manufacturing a semiconductor device, comprising acetylene and a solvent for dissolving the acetylene therein, the solvent being at least one selected from the group consisting of triethyl phosphate, trimethyl phosphate, tris(N,N'-tetramethylene)phosphonic acid triamide, and γ-butyrolactone; a semiconductor device manufacturing apparatus comprising the composition for manufacturing a semiconductor device; and a method for manufacturing a semiconductor device by using the composition for manufacturing a semiconductor device.

The invention belongs to the technical field of flame-retardant fibers, and particularly relates to a flame-retardant polyester fiber, a preparation method thereof, a drainage material and application of the drainage material. The preparation method of the flame-retardant polyester fiber comprises the following steps: mixing a phthalic acid isomer, polyol, a flame-retardant monomer and a catalyst, and sequentially carrying out esterification reaction and polycondensation reaction to obtain a copolymer; wherein the flame-retardant monomer comprises at least one of 2-carboxyethyl phenyl hypophosphorous acid, tricarboxyethyl phosphine, p-carboxyphenyl phosphonic acid, trimethyl phosphate and triphenyl phosphate; and carrying out spinning treatment on the copolymer to obtain the flame-retardant polyester fiber. Esterification and condensation polymerization are sequentially completed in a one-pot method, separation and transfer of intermediate products are not needed, continuous conversion from raw materials to polymers is achieved, the preparation process of the flame-retardant polyester fiber is simplified, and the preparation efficiency is improved. The prepared flame-retardant polyester fiber is not easy to paste in the application process, the raw materials are green and environment-friendly, the safety is high, and the flame-retardant polyester fiber can be applied to industries such as food and medical treatment.

The invention belongs to the technical field of high polymer material additives, and particularly relates to a composite antioxidant stabilizer composition as well as a preparation method and application thereof, in particular to the composite antioxidant stabilizer composition and a one-pot preparation process thereof. According to the preparation method, 3, 5-methyl ester or meta-3, 5-methyl ester, octadecanol, pentaerythritol, trimethyl phosphite and absolute methanol are taken as raw materials, a zinc-containing compound is added as a catalyst, transesterification is catalyzed, and the composite antioxidant stabilizer composition containing an antioxidant 1076, an antioxidant 1010 and a phosphite antioxidant 618 at the same time can be prepared through a one-pot method. The antioxidant composition prepared by the method has the advantages that the antioxidant effect of the ABS resin can be obviously improved and the comprehensive performance of the ABS resin can be improved when the antioxidant composition prepared by the method is applied to the ABS resin as compared with the antioxidant composition prepared by the traditional method after auxiliaries such as the acid acceptor are added into the composition.

The invention relates to a synthetic method of methyl diphenyl phosphate, which comprises the following steps: mixing triphenyl phosphite, trimethyl phosphite, phenate and metal oxide, and carrying out transesterification to obtain the methyl diphenyl phosphate. According to the preparation method provided by the invention, by adopting the compound catalyst, the use of alkyl halide can be avoided, the reaction temperature is relatively mild, the purity is not lower than that in the prior art, and the problems of more byproducts, higher reaction temperature and safety risk caused by taking alkyl halide as a catalyst in the existing preparation method are solved.

The invention relates to the technical field of electrochemical energy storage, in particular to an acid-free tin ion electrolyte and application thereof. The acid-free tin ion electrolyte is characterized by comprising divalent tin salt, a solvent and an organic cosolvent, the divalent tin salt is tin methanesulfonate and / or tin fluoborate, and the organic cosolvent is triethyl phosphate and / or trimethyl phosphate. The cosolvent is added into the electrolyte, so that the electrolyte has the advantages of simple components and low cost. Organic cosolvent molecules reduce the water activity, so that hydrogen evolution and corrosion can be effectively inhibited. The organic cosolvent molecules and the tin salt cooperatively regulate and control the solvation structure of tin ions, so that the electrolyte effectively prevents oxidation and hydrolysis of divalent tin ions and keeps chemical stability under the condition of not additionally adding acid, tin deposition grains can be refined, the growth direction of deposited metal tin can be regulated and controlled, compact tin deposition is realized, the surface capacity of the battery is improved, and the service life of the battery is prolonged. Therefore, the tin electrode can stably operate under high current density.

The invention discloses a safe silicon-carbon negative electrode lithium ion battery and a preparation method thereof, and belongs to the technical field of lithium ion batteries. The lithium ion battery comprises a positive plate, a negative plate, a diaphragm, electrolyte and a shell, the positive plate comprises a positive current collector, a prime coating and a positive active coating; the prime coating comprises ceramic powder, a single-walled carbon nanotube and a binder; the negative plate comprises a negative current collector and a negative active coating; the diaphragm comprises a base membrane and a ceramic coating coated on the surface of the base membrane, wherein oil coatings composed of aramid fibers, PVDF and an organic solvent are coated on the two surfaces of the ceramic coating; the electrolyte comprises a lithium salt, an organic solvent and a flame retardant additive composed of trimethyl phosphate, trimethyl borate and chloroethylene carbonate. According to the lithium ion battery disclosed by the invention, the puncture resistance and the safety can be greatly improved under the condition that the performance of the battery is kept unchanged, the qualified rate of a needling test is high, and the daily use high-safety requirement of the battery with a wearable silicon-carbon negative electrode within 2Ah can be met.

The invention discloses a sodium-ion battery electrolyte of a low-fluoro phosphate system and a sodium-ion battery, the sodium-ion battery electrolyte comprises sodium salt, a solvent and an electrolyte additive, the solvent is a low-fluoro phosphate solvent, the low-fluoro phosphate ester solvent is one or more than two of trimethyl phosphate, triethyl phosphate and / or tripropyl phosphate, wherein the trimethyl phosphate, the triethyl phosphate, the triethyl phosphate and the tripropyl phosphate are 1, 2, 3, 4, 5, 6-hexafluoro respectively. The sodium-ion battery electrolyte of the low-fluorophosphate system and the sodium-ion battery have the characteristics of high conductivity, strong compatibility and good safety.

The invention belongs to the technical field of lithium ion batteries, and provides an aluminum alkoxide-phosphate / phosphite electrolyte as well as a preparation method and application thereof. The aluminum alkoxide-phosphate ester / phosphite ester electrolyte comprises aluminum triethoxide, a phosphate ester / phosphite ester compound, an electrolyte solute and a non-aqueous solvent; the phosphate ester / phosphite ester compound is trimethyl phosphate, triethyl phosphate, triisobutyl phosphate, triphenyl phosphate, tripropargyl phosphate, tris (trimethylsilyl) phosphate, dimethyl methylphosphonate, diethyl ethylphosphonate, trimethyl phosphite, triethyl phosphite and triisopropyl phosphite, and the solvent is a solvent. The catalyst is one or more of triphenyl phosphite and tri (trimethylsilyl) phosphite. The electrolyte has good thermal stability and flame retardance under high voltage, and the safety of the battery is greatly improved; in addition, the electrolyte additive composition can inhibit the corrosion of the aluminum current collector, so that the side effect of the corrosion of the current collector on the battery is reduced.

The invention discloses photocuring 3D printing copper slurry and a preparation method and application thereof. Relates to the technical field of 3D printing. The photocuring 3D printing copper paste comprises the following components: urethane acrylate; copper powder; a photoinitiator; a thermal polymerization inhibitor; an anti-copper agent; the copper-resistant agent is selected from at least one of benzotriazole, a benzotriazole derivative, 3-mercaptopropionic acid, triphenyl phosphate, triphenyl phosphate and trimethyl phosphate; the copper powder is composed of copper particles with the average particle size of 0.3-1 micron, 3-5 microns and 10-20 microns. The photocuring 3D printing copper paste has the advantages of being good in stability, free of spontaneous curing, long in quality guarantee period, high in forming precision and the like, and obvious sedimentation and self-curing phenomena are achieved when the photocuring 3D printing copper paste is stored for 60 days under the normal-temperature dark condition; and no obvious sedimentation and self-curing phenomena exist after the coating is stored for 180 days under the low-temperature dark condition of 0-4 DEG C.