30results about How to "Reduce the probability of reunion" patented technology

The invention provides an all-solid-state electrolyte and a preparation method thereof, and a lithium ion battery. The all-solid-state electrolyte comprises a first functional layer, an intermediate functional layer and a second functional layer, the first functional layer is arranged on a lower surface of the intermediate functional layer, and the second functional layer is arranged on an upper surface of the intermediate functional layer; the intermediate functional layer comprises a composite electrolyte layer and modified layers, the composite electrolyte layer is filled with the modifiedlayers, the modified layers cover a whole upper surface and a whole lower surface of the composite electrolyte layer, and the composite electrolyte layer comprises an inorganic electrolyte, a polymerand lithium salt; and the first functional layer and the second functional layer include the polymer and the lithium salt. The all-solid-state electrolyte is good in interface stability and interfacecompatibility, high in mechanical strength and capable of well coping with a volume strain, a risk of short circuit in battery manufacturing is reduced, meanwhile, a lithium dendrite inhibiting capacity of the electrolyte is enhanced, and therefore cycle performance and a charging and discharging capacity of the lithium ion battery can be effectively improved.

The invention relates to the technical field of lithium ion batteries, and discloses a single crystal type multi-element positive electrode material and a preparation method and application thereof. The positive electrode material meets the following conditions: the single crystal sizes DPS90, DPS10 and DPS50 of the positive electrode material measured by SEM meet the following relation: 0.1 < = B90 = (DPS90-DPS10) / DPS50 < = 1.5; the agglomeration rate of the positive electrode material is less than or equal to 20%; wherein 90% of the single crystal size of the DPS90 positive electrode material is smaller than that of DPS90; the single crystal size of the DPS50 positive electrode material is 50% smaller than that of DPS50; the single crystal size of the DPS10 positive electrode material is 10% smaller than that of DPS10. The single crystal type multi-element positive electrode material is round and full in morphology, uniform in particle size, less in agglomeration, less in adhesion, high in compaction density and good in structural stability, and when the single crystal type multi-element positive electrode material is applied to the lithium ion battery, the energy density, the rate capability, the cycling stability and the safety of the lithium ion battery can be improved.

The invention provides a coordination method of quantum dots, the quantum dots and a display device. The coordination method of the quantum dots includes the steps: providing quantum dots and a polymer, wherein a first ligand is arranged on the surface of the quantum dots, and the polymer is provided with coordination groups; and dissolving the quantum dots and the polymer in a solvent so as to achieve re-coordination of the coordination groups of the polymer with the quantum dots and form a second ligand on the surface of the quantum dots, and achieving separation of the first ligand from thesurface of the quantum dots so as to obtain the re-coordinated quantum dots. According to the technical scheme, the agglomeration rate of the quantum dots is reduced through re-coordination of the quantum dots with the polymer.

The invention provides a superhard material electroplated grinding wheel abrasive rearrangement and uniform distribution sanding device and method. The superhard material electroplated grinding wheelabrasive rearrangement and uniform distribution sanding device comprises supporting plates and cover plates which are correspondingly arranged up and down, a sanding shaft is arranged between the supporting plates, a grinding wheel base body is fixedly arranged on the sanding shaft, sand covers are arranged between the supporting plates and the cover plates, superhard abrasives are arranged between the sand covers, and the grinding wheel base body is arranged in the superhard abrasives. According to the device, the abrasive density consistency can be improved, quantitative addition of the abrasives is achieved by stipulating the amount of the abrasives, the consistency of pressure in a jig during each time of sanding is guaranteed, a grinding wheel rotates and moves downwards through the characteristic of screw-thread fit, the abrasives attached to the surface of the grinding wheel base body are rearranged, the distribution uniformity of the abrasives is guaranteed, and on the premiseof keeping the total electric quantity unchanged, the consistency of the abrasive density of each grinding wheel is controlled. Meanwhile, the method can achieve one-time sand feeding success, meet the requirement for one-time sand feeding of the electroplated grinding wheel profile, completely eradicate the influence of sand supplementation on the size of the plated grinding wheel and effectivelyreduce the jerk value of the profile of the plated grinding wheel.

The invention discloses a SiO2-TiO2 composite metamaterial structure photocatalyst and a preparation method thereof. The preparation method comprises the following steps: preparing a SiO2 inverse opalstructure by taking PS colloidal crystals as a template, and growing TiO2 in the SiO2 inverse opal structure by adopting a hydrothermal method to prepare the SiO2-TiO2 composite metamaterial structure photocatalyst. The method is simple in process, short in period, simple in equipment and low in cost, and the obtained composite material shows high photocatalytic performance due to the change of curved surface composite morphology.

The invention discloses a sun-proof and heat-insulating coating for buildings and a preparation method thereof. The blend is obtained by mixing water-based acrylic resin, modified silica airgel, zinc phosphate, organic fluorine epoxy resin and silicone resin , put the blend into the mixing tank, stir evenly and then filter, and mix the boric acid microparticles and inorganic fillers into the SiO 2 In the sol precursor, it fills the defects in the nonlinear optical crystal, and then regulates the infrared radiation performance, and undertakes the function of enhancing the infrared radiation performance of the atmospheric window band. Adding a dispersant makes the molecular chain of the dispersant fully stretch in the aqueous solution. In SiO 2 A surface adsorption layer of a certain thickness is formed on the surface of the airgel particles, which produces a steric hindrance effect, thereby achieving the promotion of the development of high-grade green buildings and the improvement of SiO 2 The purpose of dispersion stability of airgel system.

The invention relates to a polyimide composite material, a composite film and a preparation method thereof. Polyimide composite materials include polyimide, noble metal Au, Ag or Pt nanoparticles and TiO 2 nanotubes, noble metal nanoparticles grown in situ on the TiO 2 on the inner and outer walls of the nanotubes. Photoreduction process on TiO 2 In-situ growth of noble metal nanoparticles on the inner and outer walls of nanotubes, and then adding them to dianhydride and diamine precursors for in-situ polymerization to obtain polyimide precursor composite materials, and then imidization to obtain the described Polyimide composite material. On the upper and lower surfaces of the ordinary polyimide intermediate layer, the polyimide precursor composite material is coated at the same time, and then imidized to obtain a polyimide composite film. The polyimide composite film of the invention has obviously improved corona resistance while maintaining excellent mechanical properties.

The invention relates to a method for recovering organic tin acetate from waste floccules in sucralose production, which comprises the steps of distillation, neutralization, centrifugation, water separation, acylation and extraction, and is characterized in that between the distillation step and the neutralization step, a black brown floccule obtained by distillation is mixed with and dissolved in a protonic solvent according to a volume ratio of 10: (1-5); and crude dibutyltin oxide obtained through centrifugation in the neutralization step is dried at 40-100 DEG C to obtain dried crude dibutyltin oxide. The method has the advantages that the black brown floccule is dissolved with the protic solvent, the dispersion effect of the dibutyltin oxide in water can be promoted, the treated dibutyltin oxide powder is uniform in particle, the appearance of the product is similar to that of a pure product in color, the impurity content is low, and the production efficiency can reach the standard of a normal catalyst and is relatively stable; and the method is easy to operate, the reaction efficiency and the material utilization rate of the whole production process are optimized, and the economic benefits of enterprises are obviously increased.

The invention provides a preparation method of a nano hard alloy, which comprises the following steps: providing a ball mill, adding powdered tungsten carbide, powdered cobalt, a nucleation inhibitor, absolute ethyl alcohol, a dispersing agent and paraffin into the ball mill, dissolving the dispersing agent in the absolute ethyl alcohol, adding the mixture into the ball mill, and uniformly stirring; the dispersing agent comprises fatty alcohol-polyoxyethylene ether, polyglycerol-6 laurate and stearic acid, and continuously ball-milling to obtain a first nano hard alloy mixture; the first nano hard alloy mixture is dried to remove absolute ethyl alcohol, and a second nano hard alloy mixture is obtained; and the second nano hard alloy mixture is placed in a mold, dewaxing is conducted on the second nano hard alloy mixture to remove the paraffin and the dispersing agent, and then sintering is conducted to obtain the nano hard alloy.

The invention relates to a polyimide composite material, a composite film and preparation methods of thepolyimide composite material and the composite film. The polyimide composite material comprises polyimide, noble metal Au, Ag or Pt nanoparticles and a TiO2 nanotube, wherein the noble metal nanoparticles grow on the inner wall and the outer wall of the TiO2 nanotube in situ. The preparation method of the polyimide composite material comprises the following steps of: performing in-situ growth of noble metal nanoparticles on the inner wall and the outer wall of a TiO2 nanotube through a photoreduction process; adding the TiO2 nanotube with the noble metal nanoparticles into dianhydride and diamine precursors for in-situ polymerization to obtain a polyimide precursor composite material; and performing imidization to obtain the polyimide composite material. The upper and lower surfaces of a common polyimide intermediate layer are coated with the polyimide precursor composite material on at the same time, and then imidization is performed to obtain the polyimide composite film. The polyimide composite film disclosed by the invention has obviously improved corona resistance under the condition of keeping excellent mechanical properties.

The invention relates to the technical field of thermally conductive silicone rubber, in particular to a silicone rubber material with high thermal conductivity. The thermal conductivity of silicone rubber is the same as that of most polymers. The thermal conductivity is poor, and the thermal conductivity is only 0.2w / m·k. Graphene is simply dispersed into the silicone rubber material system. The compatibility of graphene and silicone rubber is not Too good, and the graphene particles are easy to agglomerate, which is very unfavorable for improving the thermal conductivity of silicone rubber. Based on the above problems, the present invention provides a silicone rubber material with high thermal conductivity, which uses a special titanate coupling agent to connect graphene and graphite to form a larger heat conduction network, and adds graphene or graphite and silicone rubber material The compatibility between them reduces the probability of agglomeration of graphene or graphite particles themselves. In the present invention, spherical alumina and tetrapod zinc oxide with different particle sizes are added to the silicone rubber system, and the thermally conductive fillers work synergistically. Greatly improved the thermal conductivity of the silicone rubber material.

The invention provides an industrial production method of N-ethylpyrrolidone, which belongs to the technical field of preparation of fine chemical products, and comprises the following steps: Step 1, adding γ-butyrolactone into a stirred tank, and a tube is welded on the stirrer, The catalyst is filled in the tube, and the solvent flows out through the holes on the tube and fully mixed with γ-butyrolactone; step 2, the material flowing out of the stirred tank is fully mixed with monoethylamine and then sent to the tube reactor, and the feeder has Atomizing nozzle, after the solvent is atomized, it is fully mixed with the material from the upper reaction section, collected, and evenly enters the tubes of the lower reaction section after passing through the distributor; step 3, the product flowing out of the tube-and-tube reactor is sent to the stirring In the jacket of the kettle, after exchanging heat with the material in step 1, it flows out from the outlet of the jacket and enters the refining stage. The invention solves the shortcomings of high reaction temperature, high reaction pressure, high equipment requirements and low environmental protection benefit existing in the existing N-ethylpyrrolidone production.

The invention relates to a method for extracting a nanometer second phase by using a non-aqueous solution electrolysis system and its application. The invention uses a unique design of the electrolysis system to make the electrolyte form overflow and eddy current during the electrolysis process, and the overflow and eddy current electrolyte continuously washes the electrodes and the electrolytic cell, which can effectively prevent the second nano-phase from forming in the electrode and the electrolytic cell. Surface adsorption and agglomeration of nanosecond phases. Through the design of electrolyte composition, especially the combined use of electrolyte, thickener and complexing agent, the selective electrolysis reaction of ferromagnetic alloy can be realized, the effective separation of matrix and second phase in ferromagnetic alloy can be realized, and the Fe 3+ Settling and covering on the surface of the second phase; effectively increasing the second phase settling resistance and inhibiting the second phase settling. The use of the electrolyte solution and electrolysis system is beneficial to improving the efficiency of the electrolysis reaction, improving the collection rate of the second phase with a size smaller than 20nm, especially smaller than 15nm, and realizing the extraction and characterization of the nanometer second phase in the ferromagnetic alloy.

The invention relates to the technical field of aluminum hydroxide manufacturing, and especially relates to a method for preparing non-metallurgical alumina by an electrolysis process. Reasonable control of the caustic-to-alumna molar ratio of a sodium aluminate solution and electrolysis, washing and microwave radiation treatments make the sodium oxide content of the prepared alumina greatly reduced to 0.1% or less, so the method has the advantages of low cost and high yield; the alumina product has a high purity and a high yield, and a byproduct sodium hydroxide is obtained, so the recyclingof the sodium hydroxide is achieved.

The invention provides an all-solid electrolyte, a preparation method thereof, and a lithium-ion battery. The all-solid electrolyte includes: a first functional layer, an intermediate functional layer, and a second functional layer. The first functional layer is arranged on the lower surface of the intermediate functional layer. The second functional layer is arranged on the upper surface of the intermediate functional layer; wherein, the intermediate functional layer includes a composite electrolyte layer and a modified layer filled inside the composite electrolyte layer and covers the entire upper and lower surfaces of the composite electrolyte layer. The composite electrolyte layer includes an inorganic electrolyte, a polymer substance, lithium salt; the first functional layer and the second functional layer include polymer and lithium salt. The all-solid electrolyte not only has good interfacial stability and interfacial compatibility, but also has high mechanical strength, can well cope with volume strain, reduces the risk of short circuit in battery preparation, and enhances the ability of the electrolyte to suppress lithium dendrites, so it can Effectively improve the cycle performance and charge and discharge capacity of lithium-ion batteries.

The invention relates to a graphene composite powder material, which comprises a graphene material and a micro-nano structure material attached to the surface of the graphene material. The micro-nano structure material is uniformly dispersed in the graphene material and composited with the graphene material through chemical bonds or physical effects. The graphene composite powder material has the advantages of better dispersibility and less agglomeration. The invention also relates to a preparation method of the graphene composite powder material.

The invention provides a device and method for rearranging and evenly distributing sand on super-hard material electroplated grinding wheel abrasives, which includes support plates and cover plates correspondingly arranged up and down, upper sand shafts are arranged between the support plates, and the upper sand shafts are fixed A grinding wheel base is provided, a sand cover is provided between the supporting plate and the cover plate, superhard abrasives are arranged between the sand covers, and the grinding wheel base is placed in the superhard abrasives. The invention can improve the consistency of the abrasive density, realize the quantitative addition of abrasives by specifying the amount of abrasives, ensure the consistency of the pressure in the jig each time the sand is applied, and realize the rotation and downward movement of the grinding wheel through the characteristics of thread matching, so that it will be close to the surface of the grinding wheel base The abrasives are rearranged to ensure the uniformity of abrasive distribution, and the consistency of the abrasive density of each grinding wheel is controlled under the premise that the total power remains unchanged. At the same time, the method can realize the success of one-time sanding, realize the single-time sanding requirement of the electroplated grinding wheel profile, eliminate the impact of sand filling on the plated size of the grinding wheel, and can effectively reduce the runout of the plated profile of the grinding wheel.

The invention provides a method for increasing the dielectric constant of a polypropylene film, the method comprising placing a high dielectric constant composite filler in a spheroidizing device fed with a direct current arc plasma flame flow, under the surface tension Under the effect of spheroidization, the average particle size is 95-270nm, and the average pore size is 350-650nm. The composite filler with high dielectric constant is spheroidized; the composite filler with high dielectric constant is assisted by microwave After surface treatment and pre-dispersion treatment, it is added to the process of preparing polypropylene film. On the premise of ensuring the mechanical properties of polypropylene film, it can not only solve the problem that fillers are prone to agglomeration, but also improve the dielectric strength of polypropylene film. Electric constant, and low dielectric loss, the breakdown field strength is greater than 430KV / mm, and better application reliability can be obtained in practical applications.