16895 results about "Organic solvent" patented technology

Nucleic acid hybridization buffer formulations and uses thereof are described that yield improvements in hybridization specificity, rate, and efficiency. The buffer formulation composition includes a target nucleic acid; at least one polar, aprotic, organic solvent, and a pH buffer system, wherein the target nucleic acid is attached to the surface via hybridization to a surface bound nucleic acid tethered to the surface, and wherein the hybridization of the target nucleic acid and surface bound nucleic acid has a high stringency and annealing rate.

The invention relates to the technical field of immunology, and discloses a QS-21 composite adjuvant as well as a preparation method and application thereof, and the QS-21 composite adjuvant comprises the following components in parts by weight: 0.1-0.5 part of QS-21; 4 to 6 parts of liposome; 0.05 to 0.1 part of CpG oligonucleotide; 0.1 to 0.3 part of a freeze-drying protective agent; 0.2 to 0.5 part of a stabilizing agent; 3 to 5 parts of propylene glycol; 1-2 parts of ethanol; 5-15 parts of an organic solvent chloroform; the liposome is prepared from the following components in parts by weight: 3 to 4 parts of phospholipid distearate; and 1-2 parts of amino lipid. By compounding the liposome carrier and the QS-21, adding the CpG oligonucleotide and optimizing the freeze-drying protective agent, the loading efficiency of the immunologic adjuvant, the immune effect stability and the restorability after freeze-drying are improved, and the durability and efficacy of immune response are enhanced.

The invention provides a method for enhancing interface bonding and corrosion resistance of a basalt fiber composite material, and belongs to the field of fiber surface modification chemical methods. The method is realized through the following steps: firstly, treating basalt fibers by utilizing an organic solvent through high-temperature reflux to prepare desized basalt fibers; then, the desized basalt fibers are immersed in a dopamine solution to be subjected to auto-polymerization, and basalt fibers with a polydopamine coating are prepared; sequentially immersing the basalt fiber coated with the polydopamine into a zinc salt solution and a 2-methylimidazole solution, so as to prepare a ZIF-8 modified basalt fiber; and finally, mixing the ZIF-8 modified basalt fiber with resin through electrostatic coating, and molding by adopting a segmented hot-pressing method to obtain the basalt fiber composite material. According to the method, a composite structure formed by the synergistic effect of a dopamine self-polymerization layer and ZIF-8 is introduced into the surface of the basalt fiber, so that the interface bonding force between the fiber and resin and the corrosion resistance of the composite material are greatly enhanced.

The invention relates to a battery monomer, a battery device and a power utilization device, the battery monomer comprises an electrode assembly and an electrolyte, the electrode assembly comprises a positive pole piece and a negative pole piece, the positive pole piece comprises a positive current collector and a positive film layer, the positive film layer comprises a positive active material, the positive active material comprises lithium-containing phosphate of an olivine structure, and the electrolyte is a lithium-containing lithium-containing phosphate of a lithium-containing lithium-containing lithium-containing lithium-containing lithium-containing lithium-containing lithium-containing lithium-containing lithium-containing lithium-containing lithium-containing lithium-containing lithium-containing electrolyte. The resistance of the positive pole piece is 0.1 ohm to 30 ohm, the negative pole piece comprises a negative current collector and a negative film layer, the resistance of the negative pole piece is 0.001 ohm to 0.01 ohm, the electrolyte comprises an organic solvent, the organic solvent comprises a chain ester solvent, and the mass content of the chain ester solvent in the organic solvent is 5% to 75%; the conductivity of the electrolyte at room temperature is 13 mS / cm to 20 mS / cm. The heat production amount of the battery monomer can be reduced, and the use reliability and the cycle performance of the battery monomer can be improved.

The invention provides a battery monomer, a battery device and a power utilization device, the battery monomer comprises an electrode assembly and an electrolyte, the electrode assembly comprises a first pole piece and a second pole piece, each of the first pole piece and the second pole piece comprises a coating part and a tab, the coating part is coated with an active material layer, and the tab is not coated with the active material layer; one of the first pole piece and the second pole piece is a positive pole piece, and a positive active material of the positive pole piece comprises lithium-containing phosphate with an olivine structure; the coating part of the first pole piece comprises a first straight section, the coating part of the second pole piece comprises a second straight section, the first straight section and the second straight section are stacked in the thickness direction of the electrode assembly, and the ratio of the number of the tabs of the first pole piece to the number of the first straight sections of the first pole piece is 0.5-2; an organic solvent of the electrolyte comprises a chain carboxylic ester solvent, and the mass content of the chain carboxylic ester solvent in the organic solvent is 8-90%. The use reliability and the cycle performance of the battery monomer can be improved.

The invention discloses a phosphonic acid-based metal organic framework solid electrolyte as well as a preparation method and application thereof, and belongs to the technical field of solid electrolyte materials. The method comprises the following steps: mixing a metal salt, an organic phosphonic acid ligand and an organic solvent, carrying out a coordination reaction, and treating to obtain MOF powder; heating and activating the MOF powder to obtain activated MOF powder; the method comprises the following steps: mechanically grinding lithium salt and MOF powder to form a mixture, heating to enable the molten lithium salt to permeate and fill MOF channels, and cooling to obtain solid electrolyte powder. The ionic conductivity of the solid electrolyte at 30 DEG C reaches 1.01 * 10 <-4 > S cm <-1 >, and the solid electrolyte is kept stable in a 4.4 V high-voltage window. The symmetrical battery based on the phosphonic acid-based MOF solid electrolyte can stably operate, and shows excellent compatibility and stability of the electrolyte and a lithium metal negative electrode. The method has the advantages of simple operation, cheap and easily available components, and is expected to be suitable for large-scale preparation.

The invention discloses an electrolyte with a temperature switch function and a preparation method and application thereof, and relates to the technical field of lithium ion batteries. The electrolyte provided by the invention comprises the following components: lithium salt, a first organic solvent and a polymer, the lithium salt is at least one of lithium bis (trifluoromethylsulfonyl) imide, lithium bis (fluorosulfonyl) imide, lithium hexafluorophosphate, lithium tetrafluoroborate, lithium difluoro (oxalato) borate and lithium bis (oxalato) borate; the polymer is polymethacrylate, and the first organic solvent is [Cnmim] [TFSI]. According to the electrolyte, the reversible phase transformation process is realized, the electrode reaction can be closed at high temperature, and the lithium battery is prevented from being out of control due to overheating; and when the temperature is reduced to normal temperature, the battery can work normally. The phase transition temperature of the electrolyte is flexible and controllable, and the phase transition temperature can be regulated and controlled to a reasonable interval by optimizing the composition of the electrolyte and the dosage (concentration) of each component, that is, the phase transition temperature is higher than the normal working temperature of the battery and lower than the initial temperature of the heat release side reaction.

The invention provides a three-dimensional network polymer gel electrolyte, a positive plate and a solid-state lithium battery. The three-dimensional network polymer gel electrolyte comprises 80-98% of an organic solvent, 5-15% of a lithium salt, 2-8% of lignosulfonate, 2-10% of a polymeric monomer and 2-8% of an ionic liquid, and the polymeric monomer is selected from acrylamide, polyethylene glycol dimethacrylate, 3-(methacryloyloxy) propyl trimethoxy silane or tetrahydrofurfuryl acrylate and the like. Under ultraviolet light, lignosulfonate can spontaneously generate quinonyl photochemical free radicals and hydroxyl photochemical free radicals in a mixed solution of ionic liquid and specific polymer monomers, and under the action of the photochemical free radicals, the lignosulfonate reacts with unsaturated double bonds on a polymer through phenolic groups, so that the photochemical free radicals are formed. The gel electrolyte with a three-dimensional network structure is formed, the mechanical strength can be improved, the growth of lithium dendrites in a lithium metal battery can be inhibited, and the metal lithium battery containing the gel electrolyte has excellent cycle life and safety performance.

The invention discloses preparation of an ionic porous nitrogen-rich molecular cage and application of the ionic porous nitrogen-rich molecular cage in purification of iodine-containing nuclear medical waste, and the preparation method comprises the following steps: taking an ammonia or amine reagent as a bridge, taking an aldehyde or ketone reagent as a reaction monomer, adopting a Schiff base reaction principle, and utilizing a polydentate coordination mode to carry out imine condensation reaction on substances through a one-pot method to obtain the ionic porous nitrogen-rich molecular cage. Generating a porous nitrogen-rich molecular cage; then adding a reducing agent to further reduce the porous nitrogen-rich molecular cage, then combining with alkyl halide and an organic solvent, stirring, and carrying out rotary evaporation to obtain the ionic porous nitrogen-rich molecular cage. The method has the beneficial effects that a porous organic cage material with an ionic nitrogen-rich ligand is selected as an adsorbent, so that the physical and chemical properties are stable; the preparation method is simple in synthesis and high in yield, and the nitrogen-rich ligand is stable in structure, can adsorb iodine in a gas phase and iodine in a water phase, and can be recycled; the ion interference resistance is high, and the method adapts to iodine adsorption under the water phase condition that the pH is 3-11; the method can be applied to treatment of iodine in nuclear medical wastewater.

The invention relates to the technical field of dielectric material preparation, in particular to a preparation method of a polymer dielectric film. The preparation method comprises the following steps: in an inert atmosphere, mixing a diamine monomer, a dianhydride monomer and an organic solvent, and carrying out condensation polymerization to obtain a precursor solution; wherein one of the diamine monomer and the dianhydride monomer contains benzyl groups; and carrying out imidization reaction and benzyl free radical cross-linking reaction on the precursor solution to obtain the polymer dielectric film. The glass transition temperature (Tg) of the polymer dielectric film prepared by the preparation method is improved, the modified film has excellent breakdown electric field and energy storage density in a high-temperature environment of 250 DEG C, and other complicated and high-technical-content processes are not added on the basis of a process for synthesizing a commercial polymer dielectric film; vacuum environment crosslinking is not needed, environmental protection and energy saving are achieved, the reaction degree is controllable, the surface of the prepared polymer dielectric film is smooth, and the cross section has no obvious defects.

The invention discloses a graphdiyne multilayer composite membrane and a preparation method thereof, and belongs to the technical field of membrane separation. A porous base membrane with an alkynyl layer is obtained by adopting a two-step modification method, then the porous base membrane is soaked in a solution containing a graphdiyne monomer and a catalyst, and a reaction is performed at a certain temperature, so that a graphdiyne material fully grows on the surface of the porous base membrane. Adding a membrane casting solution formed by mixing an organic polymer, a cross-linking agent, a catalyst and an organic solvent to the surface of the graphdiyne-loaded porous base membrane, volatilizing the organic solvent, and curing at 80 DEG C to form the membrane. The ethanol permselective membrane has a three-layer membrane structure, namely the organic polymer layer, the ultrathin graphdiyne transition layer and the porous support layer, so that the problems of agglomeration and pore permeation of a nano material are effectively avoided, and the adsorption process of ethanol is further enhanced. The membrane prepared by the invention has higher pervaporation alcohol permeation performance, can efficiently and stably recover alcohols, and provides reference for the development of a novel pervaporation membrane structure with preferential alcohol permeation.

The invention discloses a preparation method of a silicon-carbon material for a negative electrode of a lithium ion battery, and relates to the technical field of lithium ion batteries, and the preparation method comprises the following steps: (1) selecting a specific silicon source solute and an organic solvent to prepare an organic silicon source solution; (2) selecting porous carbon as a substrate, and carrying out vacuum impregnation treatment in a silicon source solution; (3) carrying out solvothermal silicon deposition reaction on the porous carbon impregnated with the silicon source solution in a high-pressure reaction kettle; (4) carrying out vacuum impregnation on the deposited silicon porous carbon subjected to solvent heat treatment in a carbon source organic solvent; and (5) cracking and carbonizing the deposited silicon porous carbon impregnated with the carbon source solvent at a high temperature to form the composite silicon carbon material with carbon-coated silicon crystal particles. According to the present invention, the energy density of the lithium ion battery negative electrode material is improved while the cycle life and the rate capability are significantly improved, such that the prepared silicon-carbon material has excellent electrochemical performance, and can well meet the application requirements of the lithium ion battery on the aspects of high energy density, long cycle life, high-rate charge-discharge and the like.

The invention provides lithium sulfide as well as a preparation method and application thereof. The preparation method of the lithium sulfide comprises the following steps: providing a mixed solution containing a lithium-containing compound and liquid sulfur which are uniformly mixed, and enabling the mixed solution to be in contact with a reducing gas so as to carry out a lithium sulfide synthesis reaction, after the synthesis reaction of the lithium sulfide is finished, at least removing part of sulfur in the obtained reaction mixture to obtain a crude finished product; and calcining the crude finished product to convert lithium polysulfide in the crude finished product into lithium sulfide to obtain a lithium sulfide product. According to the preparation method provided by the invention, the high-purity lithium sulfide is prepared by a one-pot method, the liquid sulfur is used as a reaction raw material and a reaction solvent, and the whole reaction process does not need to use an organic solvent; according to the method, the lithium salt conversion rate can reach 99% or above, and the purity of the obtained lithium sulfide can reach 99.99% or above; compared with the prior art, the reaction temperature is lower, and low energy consumption and high conversion rate are both considered.

The invention discloses a nano imbibition oil displacement agent as well as a preparation method and application thereof. The preparation method of the nano imbibition oil-displacing agent comprises the following steps: reacting citric acid, glucose, long-chain amine, a surfactant, an organic solvent, short-chain alcohol and water at 140-200 DEG C under 0.4-0.5 MPa for 6-16 hours to obtain the nano imbibition oil-displacing agent. The method disclosed by the invention is simple, convenient, environment-friendly and low in cost, and the prepared nano imbibition oil displacement agent has good surface and interface activity at high temperature and high salt, can be used as an imbibition oil recovery agent for an ultra-low permeability reservoir, and can remarkably improve the oil recovery rate.

The invention discloses pressureless sintered aluminum nitride ceramic as well as a preparation method and application thereof. The preparation method comprises the following steps: ball-milling and mixing micron-sized aluminum nitride, a sintering aid, nano-sized molybdenum powder, a dispersing agent, a binder and an organic solvent to prepare slurry; and drying the slurry, granulating, forming, dumping and sintering to obtain the pressureless sintered aluminum nitride ceramic. Wherein the sintering aid is a combination of samarium fluoride and yttrium fluoride. According to the preparation method, oxygen is removed at a low temperature by virtue of strong affinity of the nanoscale molybdenum powder and oxygen, the nanoscale molybdenum powder and the sintering aid jointly play a role in liquid-phase sintering assistance at a high temperature, densified sintering is realized and grain growth is inhibited by adopting pressureless sintering at a relatively low sintering temperature, the aluminum nitride ceramic with both heat conduction and strength is obtained, and meanwhile, a low-resistance second phase is generated; the resistivity of the aluminum nitride ceramic is adjusted while the heat conduction characteristic of the aluminum nitride ceramic is improved, the electrical conductivity of the aluminum nitride material is improved, and finally the aluminum nitride ceramic with high heat conduction and bending strength and moderate resistivity is obtained to meet the use requirements of electrostatic chucks.

Disclosed in the present specification are a two-dimensional MXene surface-modified with a metal-organic network, a method of preparing the same, a MXene organic ink containing the same, and uses (e.g., an electromagnetic wave shielding material). In one aspect, the two-dimensional MXene surface-modified with a metal-organic network according to the present invention can use various organic ligands by linking the surface with the organic through the metal, and can be stably dispersed in various organic solvents, especially in industrial non-polar organic solvents as well as polar organic solvents, thereby being applied to a more general-purpose technologies, and securing stability against chemical oxidation to improve long-term stability.

The invention discloses silver-coated copper powder and a preparation method thereof, and creatively provides a technology for preparing the silver-coated copper powder by combining a chemical reduction method and a replacement method through process innovation and optimization aiming at the defects in the prior art, namely, copper powder is pretreated by acid and ammonia water and then is mixed with a reducing agent; and then the reducing agent is adsorbed on the surface of the copper powder, so that the reduction reaction is limited on the surface of the copper powder, and a uniformly-coated compact silver layer is formed on the surface of the copper powder. And in the replacement and reduction process, the organic solvent is used as a medium for dispersing the copper powder, the situation that a large amount of reducing agent exists in a dispersion medium can be effectively avoided, and then the phenomenon that pure silver powder particles are formed due to independent nucleation of the silver powder is well avoided. The technological process is simple and easy to operate, and the comprehensive performance of the prepared silver-coated copper powder is basically equivalent to that of pure silver powder conductive silver paste.

A lithium-ion battery having excellent high-temperature storage and high-temperature cycling performance. The lithium-ion battery comprises a positive electrode, a negative electrode, and a non-aqueous electrolyte solution. The negative electrode comprises a negative electrode material layer containing a silicon-based material. The non-aqueous electrolyte solution comprises a lithium salt, an organic solvent, and an additive, the organic solvent comprising fluoroethylene carbonate, and the additive comprising a silane compound containing at least one carbon-carbon double bond. The lithium-ion battery satisfies the following conditions: 5≤(S*R) / (F*T)≤35, 5≤f≤15, 1.4≤R≤1.68, 9≤S≤18, and 0.01≤T≤0.5. According to the lithium-ion battery, the mass percentage content of the organic solvent and the additive in the non-aqueous electrolyte solution are controlled, and the mass percentage content of elemental silicon in the negative electrode material layer is controlled and the compaction density of the negative electrode material layer is controlled to be within a certain range, such that the lithium-ion battery has excellent high-temperature storage performance and an excellent high-temperature cycle life, while also taking into account high energy density.

The invention provides a temporary bonding adhesive and a preparation method and application thereof, and the preparation raw materials of the temporary bonding adhesive comprise the following components by weight: 60-80% of an organic solvent; 20-35% of base resin; 0.1 to 1% of tackifying resin; 0.1%-1% of an antioxidant; and 0.1-1% of a wetting leveling agent. The temporary bonding adhesive provided by the invention has the properties of high hardness, smooth film surface, high adhesive strength, high chemical corrosion resistance and the like, and can be widely applied to wafer processing.

The invention discloses a synthesis method of vitamin C ethyl ether, and belongs to the technical field of vitamin derivative synthesis. The synthesis method comprises the following steps: adding vitamin C, benzaldehyde and a catalyst into a first organic solvent, carrying out an aldolization reaction, adding an organic alkali after the aldolization reaction is finished, carrying out a neutralization reaction, adding an alkylation reagent, carrying out an alkylation reaction, and removing the first organic solvent after the alkylation reaction is finished, so as to obtain the vitamin C benzaldehyde. The preparation method comprises the following steps: adding a first organic solvent into a first organic solvent, pulping, filtering, collecting filter residues, washing and drying to obtain 5, 6-O-benzyl-3-O-ethyl-L-ascorbic acid, carrying out hydrogenation deprotection on the 5, 6-O-benzyl-3-O-ethyl-L-ascorbic acid, filtering after hydrogenation deprotection, collecting filtrate, crystallizing, collecting precipitate, washing and drying to obtain the 5, 6-O-benzyl-3-O-ethyl-L-ascorbic acid. The vitamin C ethyl ether is obtained. The synthesis method provided by the invention is simple to operate and high in production efficiency, and the obtained vitamin C ethyl ether is high in yield and purity.

The present invention relates to the field of solar cells. Specifically disclosed are a front silver-aluminum paste for a TOPCon solar cell, a preparation method therefor, and the use thereof. The conductive silver-aluminum paste contains 80-95 wt% of conductive powder, 0.1-7 wt% of glass powder and 1.5-15 wt% of an organic vehicle paste composition, the organic vehicle paste composition comprising a compound resin, a compound dispersant, an organic solvent and an additive. The compound resin and the compound dispersant can effectively solve the problems of low mass production yield and conversion efficiency of cells on narrow-linewidth screen printing plates due to the high solid content and viscosity and the poor ink permeability of conductive silver-aluminum paste.

An aqueous ultraviolet-absorbing resin emulsion, and an aqueous resin emulsion composition containing the emulsion is provided, wherein the emulsion is excellent in compatibility with a synthetic resin and light resistance. Also, the emulsion improves stability in blending with an aqueous emulsion of the synthetic resin, and prevents bleed out of the ultraviolet-absorbing resin on the surface of a coating film. Further, the aqueous ultraviolet-absorbing resin emulsion imparts excellent alkali or solvent resistance to a synthetic resin poor in alkali or solvent resistance. More specifically, an aqueous resin emulsion composition comprising (I) an aqueous ultraviolet-absorbing resin emulsion and (II) an other aqueous resin emulsion is provided, wherein the emulsion (I) is obtained by urethanizing (A) a polyol component having an ultraviolet-absorbing group {e.g., 1,1-bis[3-(2H-benzotriazol-2-yl)-4-hydroxy-benzeneethanol]methane}, (B) a polyol if necessary, (C) an alkyl or aryl dialkanolamine compound, and (D) an organic polyisocyanate in (E) an organic solvent, diluting the reaction mixture with (F) an organic solvent having a boiling point lower than 100° C. to give a resin solution, neutralizing the resin solution with (G) a neutralizing agent, and dispersing the resultant in water.

The invention discloses a solvent-resistant foaming material and a preparation method thereof, and relates to the technical field of high-molecular compound rubber foaming materials. The solvent-resistant foaming material is prepared from the following raw materials in parts by mass: 90 parts of a basic polymer, 5-25 parts of a chemical foaming agent, 0.5-5 parts of a cross-linking agent, 0.5-8 parts of a foaming aid, 5-40 parts of filler, 10-30 parts of a solvent-resistant modifier, 0.5-5 parts of a processing aid and 0.5-1.5 parts of an anti-aging agent. Through the synergistic effect of the base polymer (the nitrile rubber and the butadiene rubber are mixed according to the ratio of 1: 1) and the solvent-resistant modifier (such as polytetrafluoroethylene powder), the problem that a traditional foaming material is easy to swell and deform in an organic solvent environment is solved. On the trend, the volume swelling rate and the mass change of the material in a solvent are effectively reduced, the infiltration resistance is enhanced, the structural integrity of the material is kept when the material is in contact with lubricating oil or an alcohol solvent for a long time, and therefore the service life of a sealing piece is prolonged.

The present application provides a method for recovering waste electrolyte of lithium-ion batteries, wherein the waste electrolyte contains lithium hexafluorophosphate, comprising the following steps: S1: adding a saline solution as an extractant to the collected waste electrolyte for extraction, separating a lower organic solution and an upper aqueous solution, and recovering the lower organic solution to obtain an organic solvent; S2: adding a water-soluble carbonate and / or a water-soluble phosphate to the upper aqueous solution in step S1, filtering, and separating to obtain a lithium precipitate. The recovery method can achieve efficient separation and recovery of organic solvents and lithium elements in waste electrolytes, is simple and easy to operate, is economical and environmentally friendly, has strong applicability, and can be prepared and produced on a large scale.

The invention belongs to the technical field of oilfield chemistry, and discloses a cross-linking agent for degradable gel and a preparation method and application thereof.The preparation method comprises the steps that a compound A is dissolved in an organic solvent and stirred to be uniform, and a first solution is obtained; adding a polymerization inhibitor and a compound B into the first solution, and uniformly stirring at room temperature to obtain a second solution; the second solution is sequentially subjected to heating stirring, diethyl ether washing, ethanol recrystallization, suction filtration and drying, and the cross-linking agent for gel is obtained. According to the invention, a non-conjugated aromatic system is added into a cross-linking agent structure, so that the prepared gel can be automatically degraded under a certain temperature condition; ammonium ions and halide ions are added into a cross-linking agent structure, so that the anti-pollution performance of the gel is enhanced, and the problems that existing gel is difficult to degrade and poor in anti-pollution performance are solved.

The invention relates to the technical field of lithium batteries, and provides a lithium ion secondary battery. The battery comprises a positive plate, a negative plate and electrolyte, the positive plate comprises lithium iron phosphate particles, and the Dv50 of the lithium iron phosphate particles is 5-15 [mu] m; the electrolyte comprises an organic solvent, and the organic solvent comprises a linear organic solvent and an annular organic solvent; the linear organic solvent comprises linear carbonic ester and linear carboxylic ester, and the cyclic organic solvent comprises cyclic carbonic ester; based on the total mass of the electrolyte, the mass ratio of the cyclic carbonate is recorded as S1, the mass ratio of the linear carbonate is recorded as S2, and the mass ratio of the linear carboxylic ester is recorded as S3; s = (S2 + S3) / S1; s satisfies 1.5 < = S < = 20; the electrolyte comprises lithium bis (fluorosulfonyl) imide and lithium hexafluorophosphate; the mass ratio of the lithium bis (fluorosulfonyl) imide to the lithium hexafluorophosphate is recorded as L, Lgt; 1. The battery provided by the invention has relatively good low-temperature discharge performance and high-temperature cycle performance.

The invention is applied to the technical field of lithium ion batteries, and discloses a non-aqueous electrolyte for a lithium ion battery, which comprises the following substances in percentage by weight: 1-20% of electrolyte lithium salt, 70-90% of organic solvent and 0.1-10% of functional additive, the electrolyte lithium salt is composed of a lithium salt A and a lithium salt B, and the weight fraction of the lithium salt A is greater than that of the lithium salt B; the organic solvent is composed of a solvent C and a solvent D, the weight fraction of the solvent C is 3%-20%, and the weight fraction of the solvent D is 50%-88%. According to the non-aqueous electrolyte for the lithium ion battery, the lithium fluorosulfonyl difluoroacetate is adopted as the main lithium salt to prepare the non-aqueous electrolyte, so that the electrolyte has the advantages of high ionic conductivity, stability in air and good thermal stability, and the performance of the lithium battery is more excellent.

The invention relates to the technical field of fine chemical engineering preparations, in particular to an environment-friendly non-silicon defoaming agent as well as a preparation method and application thereof. 3.6 to 5.1 parts of a defoaming aid; 0.24 to 0.35 part of a thickening agent; 2-3 parts of a dispersing agent; 2.6 to 3.5 parts of an emulsifier; 18 to 25.3 parts of an organic solvent; 65 to 82 parts of deionized water; wherein the polyether ester A and the polyether ester B with amphiphilic structures in the polyether ester can be quickly spread on the surface of foam, carry hydrophobic components to permeate a liquid membrane and accelerate foam breakage, and the defoaming assistant A and the defoaming assistant B further promote the defoaming and foam inhibition performance of the defoaming agent by reducing competitive adsorption to the defoaming agent and delaying release of active molecules. Compared with the prior art, the method has a wide application prospect.

According to the device and method for controlling the connection void rate of the large-area thermal interface of the power electronic device provided by the invention, the device part ensures that an organic solvent and water vapor in a soldering paste layer can be smoothly discharged by optimizing the grid structure shape design of a steel mesh printing module, so that the void rate in the welding process is effectively reduced; according to the method, through optimization of the reflow soldering technology, temperature control and vacuum degree optimization of all stages such as the heating process, the heat preservation process, the pre-reflow process and the reflow process are included, the gas escape time is properly prolonged, the voidage is controlled to be 1% or below, the interface thermal resistance is reduced, and the heat dissipation performance is improved. Through optimization design and process, the production process is simplified, the operation is more convenient, the cost is low, and the method is suitable for large-scale production; and meanwhile, the voidage is effectively controlled, so that the product quality consistency in the production process is guaranteed, the heat dissipation efficiency of the power electronic device is improved, and the service life of the power electronic device is prolonged.

The invention belongs to the technical field of diaphragms, and particularly relates to an organic-inorganic composite spongy porous diaphragm as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing a polyarylether high polymer material, a pore-foaming agent, metal oxide nanoparticles and an organic solvent, and carrying out defoaming treatment to obtain a membrane casting solution; preparing the membrane casting solution into a liquid membrane; the liquid film is placed in a wet air atmosphere for pre-phase inversion, in the pre-phase inversion process, water vapor in wet air and an organic solvent in the liquid film are subjected to preliminary exchange, a through spongy porous structure is induced to be formed in the liquid film, and a spongy porous liquid film is obtained; and placing the spongy porous liquid membrane in an extracting agent for phase inversion to obtain the organic-inorganic composite spongy porous diaphragm. The preparation method provided by the invention not only overcomes the defects of the existing diaphragm in pore channel connectivity and pore diameter control, but also remarkably improves the hydrophilic performance of the diaphragm, and greatly reduces the resistance at the same time.