139results about How to "Small volume change" patented technology

The invention discloses a lithium ion battery negative electrode with low expansion and low impedance. The lithium ion battery negative electrode comprises a composite current collector and a negative electrode active material coating coated on at least one surface of the composite current collector, the negative electrode active material coating comprises a negative electrode active material, graphene and lithium polyacrylate; the mass ratio of the negative electrode active material to the graphene to the lithium polyacrylate is (90-99): (0.5-5): (0.5-5), the negative electrode active material comprises a silicon carbon material and a coating material layer arranged on the outer surface of the silicon carbon material, and the coating material layer comprises a polypyrrole layer and single-walled carbon nanotubes uniformly distributed in the polypyrrole layer. Compared with the prior art, the lithium ion battery negative electrode provided by the invention has the advantages of low expansion and low impedance, and can effectively inhibit the expansion of silicon particles, reduce the internal resistance of the battery and maintain the structural stability of the electrode.

The invention relates to the technical field of electronic ceramic materials, and particularly discloses a microwave dielectric ceramic material and a preparation method thereof.The microwave dielectric ceramic material is prepared from, by mass, 75-95 parts of a first main material, 0-18.4 parts of a second main material, 0.03-3.9 parts of B2O3 and 0-13.5 parts of other components, and the first main material is SiO2. When the mass ratio of the B2O3 to the SiO2 is within a specific range, the crystal phase of the SiO2 can be stably converted into a quartz crystal phase, so that the cracking possibility of the microwave dielectric ceramic material is effectively reduced.

The invention discloses a sodium ion battery positive electrode material with high cycle performance and a preparation method of the sodium ion battery positive electrode material. According to the sodium ion battery positive electrode material, magnesium, titanium, nickel and aluminum are doped in a layered transition metal oxide matrix, so that the electrochemical performance of the material can be optimized; wherein the doping of magnesium and titanium improves the structural stability and thermal stability of the material, the introduction of nickel enhances the conductivity, the doping of aluminum reduces the volume change of the material, and the rate capability and cycling stability of the material are effectively improved; meanwhile, corrosion and side reaction of electrolyte are further reduced through surface coating of the conductive polymer, the service life of the battery is remarkably prolonged, the cycle performance of the battery is remarkably improved, and particularly, a good capacity retention rate can be kept under the high-rate charge-discharge condition.

The invention belongs to the technical field of sodium ion batteries, and discloses a preparation method of an ion-doped low-nickel layered oxide sodium ion battery positive electrode material. The chemical formula of the sodium ion battery positive electrode material is Na < 0.95-x > Ca < x > (Ni < 0.2 > Fe < 0.4 > Mn < 0.4 >) < 1-y-z > Li < y > Mg < z > O < 2 >. The preparation method comprises the following steps: weighing a sodium source, a nickel-iron-manganese hydroxide, a calcium source, a lithium source, a magnesium source and a certain amount of a dispersing agent in a ball-milling tank, and carrying out ball-milling mixing to obtain a sodium-ion battery positive electrode material precursor; and placing the sodium ion battery positive electrode material precursor in a corundum crucible, transferring the corundum crucible to a box-type atmosphere furnace for segmented sintering, naturally cooling to room temperature after sintering is completed, and grinding and sieving to obtain the ion-doped low-nickel layered oxide sodium ion battery positive electrode material. The positive electrode material has the advantages of low cost, low strain, high capacity, good cycle stability, simple preparation process, high repeatability and great potential of large-scale production.

The invention discloses a preparation method of a lithium manganese iron phosphate battery positive electrode material, and belongs to the technical field of battery positive electrode material preparation. The preparation method of the lithium manganese iron phosphate battery positive electrode material comprises the following steps: (1) adding a lithium source, a manganese source, an iron source, a phosphate radical source and polyacrylonitrile into a container, then adding N, N-dimethylformamide as a solvent, stirring under a water bath heating condition to obtain a spinning solution, stirring and mixing the spinning solution with a composite organic matter, and then, carrying out ultrasonic treatment to obtain a precursor solution; carrying out ultrasonic treatment, and then carrying out electrostatic spinning to obtain a positive electrode material precursor; (2) after aging the positive electrode material precursor, transferring the positive electrode material precursor into a tubular furnace for heat treatment to obtain a carbonized positive electrode material; and (3) carrying out ball-milling mixing on the composite carbon nanotube and the carbonized positive electrode material, and pressing to obtain the lithium manganese iron phosphate battery positive electrode material. The positive electrode material prepared by the method has excellent cycle performance, structural stability and rate capability.

The invention relates to the technical field of electrode materials, in particular to a composite silicon negative electrode material suitable for a sulfide-based all-solid-state battery and a preparation method and application thereof, and the preparation method comprises the following steps: (1) generating a metal organic framework material on the surface of a nano silicon material through an in-situ growth method; (2) carbonizing the metal organic framework material on the surface of the nano silicon material through calcination treatment to form a nitrogen-doped porous carbon material, so as to obtain a Si-NC material; and (3) generating a sulfide solid electrolyte on the surface of the Si-NC material through an in-situ growth method to obtain the Si-NC-SE composite silicon negative electrode material. According to the invention, the surface of the Si material is coated with the nitrogen-doped porous carbon material (NC) through an in-situ generation technology, and the sulfide solid electrolyte is generated in situ, so that the conductivity of the composite silicon negative electrode material and the cycling stability of the sulfide-based all-solid-state battery adopting the composite silicon negative electrode material are improved.

The invention relates to a preparation method and application of a Zr-doped high-entropy Prussian blue sodium-ion battery positive electrode material, and belongs to the technical field of sodium-ion batteries. The preparation method comprises the following steps: carrying out ball milling reaction on MnSO4. H2O, FeSO4. 7H2O, ZnSO4. 7H2O, NiSO4. 6H2O, Zr (SO4) 2.4 H2O, sodium citrate and C6FeN6. 4Na. 10H2O; and adding a ball-milling reaction product into deionized water for ultrasonic treatment, washing with deionized water and ethanol, and carrying out vacuum drying to obtain the Zr-doped high-entropy Prussian blue sodium-ion battery positive electrode material. The Zr-doped high-entropy Prussian blue sodium-ion battery positive electrode material disclosed by the invention is used as a positive electrode active material of a sodium-ion battery, and has the properties of high energy density, high power density and long cycle life.

The invention discloses a high-rate-performance sodium ion battery positive electrode material and a preparation method and application thereof.The preparation method comprises the steps that a Na source, a Ni source, a Mn source, a Sn source, a Li source and a Ti source are mixed to be uniform, and a first substance is obtained; and sintering the first substance in an air atmosphere at 900-1000 DEG C for 1-12 hours, and cooling along with a furnace to obtain the high-rate-performance sodium ion battery positive electrode material. The high-rate-performance sodium-ion battery positive electrode material is a Li and Ti co-doped nickel-manganese-tin layered oxide positive electrode material, and the rate performance and the cycling stability of the sodium-ion battery are remarkably improved through the Li and Ti co-doping synergistic effect. The sodium-ion battery prepared from the high-rate-performance sodium-ion battery positive electrode material has high rate performance and high cycle stability, and has potential application value in sodium-ion batteries, especially fast-charging solid-state sodium-ion batteries.

The invention relates to the technical field of fastener preparation, in particular to a high-temperature-resistant zirconium oxide fastener and a manufacturing method thereof.The manufacturing method comprises the following steps that high-purity zirconium oxide powder is selected as a raw material, the zirconium oxide powder is pretreated, and uniform and fine powder particles are obtained; pressing the zirconium oxide powder into a fastener blank in a required shape by adopting a hot press molding process; sintering the fastener blank into a compact zirconium oxide fastener by adopting an electric furnace sintering process according to the phase change characteristic and sintering kinetics of zirconium oxide; the sintered zirconia fastener is subjected to polishing and sand blasting surface treatment until the surface smoothness of zirconia meets the requirement, and the volume change of zirconia in the phase change process is successfully reduced by precisely controlling sintering process parameters and combining with pretreatment of a hot press molding process, so that the surface smoothness of the zirconia fastener is improved. Therefore, generation of internal cracks and overall deformation of the fastener are effectively restrained.

This invention discloses a method for preparing interface-reinforced niobium pentoxide / porous graphene and its energy storage application. The method involves adding porous graphene oxide during the solvothermal synthesis of a niobium pentoxide precursor to obtain a composite precursor of niobium pentoxide and porous graphene oxide. This precursor is then annealed under a protective atmosphere to obtain the interface-reinforced niobium pentoxide / porous graphene composite material. The composite material obtained by this invention exhibits excellent performance as an electrochemical energy storage material. Furthermore, the preparation method of this invention is simple to operate, requires no complex equipment, and is easily controlled, making it suitable for mass production.

The invention provides a double-carbon-layer-coated silicon-carbon negative electrode material and a preparation method and application thereof.According to the method, a nano silicon material can be preliminarily and uniformly coated with an amorphous carbon precursor material to form an inner carbon layer by means of a spray drying method; the preparation method comprises the following steps: preparing a nanometer silicon material, uniformly coating asphalt by using a liquid phase coating method to form an outer carbon layer so that the surface of the nanometer silicon material is uniformly coated with a double-carbon-layer material, carbonizing the nanometer silicon material coated with the double-carbon-layer material in inert gas by stages, gradually removing volatile substances from the double-carbon-layer material by gradually increasing the carbonization temperature, and preparing the nanometer silicon material with the double-carbon-layer material. And finally, the silicon-carbon negative electrode material with the double-carbon-layer-coated micro-nano spherical structure is obtained, and the double-carbon-layer-coated silicon-carbon negative electrode material shows excellent performance in the aspects of initial capacity, reversible capacity and residual capacity retention rate after circulation.

The invention relates to the technical field of hydrogen storage materials, and particularly discloses a slurry-like hydrogen storage material and a preparation method thereof.The slurry-like hydrogen storage material is prepared by mixing metal hydride, a liquid organic hydrogen carrier and an additive, and the preparation method includes the steps that one of magnesium hydride (MgH2), sodium-aluminum hydride (NaAlH4) and calcium hydride (CaH2) is selected as the metal hydride, and the other one of magnesium hydride (MgH2), sodium-aluminum hydride (NaAlH4) and calcium hydride (CaH2) is selected as the additive; one of methyl cycloolefin (MCH) and tetrahydronaphthalene is selected as a liquid organic hydrogen carrier, and polyvinyl alcohol (PVA) or polyurethane (PU) is selected as an additive. According to the preparation method disclosed by the invention, by optimizing the compounding ratio of the metal hydride to the liquid organic hydrogen carrier, enhancing interface contact, improving the stability of the material and strictly controlling storage and operation conditions, the problems of hydrogen storage capacity, hydrogen storage efficiency, stability and the like of a traditional slurry hydrogen storage material are solved, and the hydrogen storage material has relatively good performance and relatively high hydrogen storage capacity.

The invention relates to a synthesis method and application of a double-layer thermochromic deformation hydrogel, according to the double-layer thermochromic deformation hydrogel, CMC is adopted to perform mechanical enhancement on original PNIPAm, LAP is adopted to perform photo-initiation on a monomer, and the price of CMC and LAP is far lower than that of functionalized silicon dioxide nanoparticles and AIBA in the prior art under the same usage amount. Meanwhile, drugs used in the process are free of volatility and corrosivity, and the safety degree is higher than that of acrylic monomers used in the prior art. Besides, the use temperature of a hydrogel device in the prior art is 60 DEG C and is high, while the double-layer temperature-sensitive hydrogel in the invention can be curled only at 40 DEG C, so that the hydrogel has more advantages in temperature. By adding CMC, the volume change of the hydrogel in the heating process is remarkably reduced, meanwhile, the mechanical property of the hydrogel is greatly improved, the mechanical property of the hydrogel is further improved through impregnation of zirconium ions, and the hydrogel has a wider application scene.

The invention discloses a tube nest type paraffin heat storage device, and relates to the technical field of heat storage devices, the tube nest type paraffin heat storage device comprises an outer shell, a mounting shell and a plurality of groups of tube nest assemblies, each tube nest assembly comprises a fixing frame, a plurality of heat storage tubes and tube hoops used for fixing the heat storage tubes, and each heat storage tube comprises a tube body, a heat storage medium and a heat exchange promoting mechanism. The heat exchange promoting mechanism is arranged in the pipe body and used for removing solid paraffin solidified on the inner wall of the pipe body in the heat release process and pushing the solid paraffin towards the inner wall of the pipe body in the heat absorption process so as to promote heat exchange. The heat exchange promoting mechanism is arranged in the heat storage pipe, solid paraffin solidified on the inner wall of the pipe body can be effectively removed in the heat release stage, heat resistance is reduced, it is ensured that heat is smoothly transmitted to liquid paraffin, and heat release is completed; and the contact area between the paraffin and the pipe wall is increased, and efficient absorption of heat is promoted.

The invention discloses a nitrogen-doped carbon / V2O3 integrated hierarchical pore composite energy storage material and a preparation method thereof, and belongs to the technical field of energy storage materials. According to the method, NaCl is adopted as a template agent, ammonium metavanadate, urea and carboxymethyl cellulose are adopted as raw materials to prepare a mixture sol, and the sol is changed into xerogel through a freeze-drying technology. And then preparing the nitrogen-doped carbon / V2O3 integrated hierarchical porous composite material in situ by adopting a one-step simple thermal decomposition and thermal reduction strategy. The composite material prepared by the invention is composed of nitrogen-doped carbon and V2O3 without obvious morphology, and presents an integrated three-dimensional hierarchical pore structure. The pore diameter of the internal micropores is 0.6-3.5 nm; the aperture of the mesopores is 5.3 to 20 nm; and the specific surface area is 208-999 m < 2 > g <-1 >. Excellent electrochemical performance is shown in the storage process of sodium ions and potassium ions. The hierarchical porous composite energy storage material prepared by the method is high in universality, simple to operate, low in cost, high in yield and suitable for industrial production.

The present invention discloses a preparation method and application of pre-magnesium silicon oxide, belonging to the technical field of lithium ion batteries. The steps of the preparation method include: S1, weighing silicon oxide, magnesium source and carbon source according to the mass ratio, grinding and mixing to obtain a precursor; S2, placing the precursor on a carrier of a Joule heating device, connecting the power supply of the electrode in the Joule heat treatment device under a protective atmosphere, performing thermal shock treatment, and obtaining pre-magnesium silicon oxide. Rapid heating is achieved by Joule heating, and the reaction of magnesium source and silicon oxide is precisely controlled, so that the reaction is more sufficient and efficient, and the initial charge and discharge efficiency, charge and discharge rate performance and cycle stability of the battery capacity of the lithium battery are improved.

The application provides a flaky flower-like single-crystal sodium vanadium oxyfluorophosphate / carbon composite material, a preparation method thereof and a sodium ion battery. The flaky flower-like single-crystal sodium vanadium oxyfluorophosphate material is prepared through a hydrothermal reaction. A surfactant is used to control the crystal face growth direction in the material synthesis process, so that the sodium vanadium oxyfluorophosphate grows to form a flaky flower-like single-crystal structure, and then the ion transmission distance is shortened, the ion kinetic characteristics of the material can be effectively improved, and on the basis of ensuring the structural stability of the material, that is, the cycle performance, the rate characteristics of the material are effectively improved. Through carbon coating, the electronic conductivity of the surface of the material particles is improved, and the capacity rate performance of the material is effectively improved.

The present application provides a silicon negative electrode material with a porous coating layer, including a silicon-based material, a conductive carbon layer and a fast ion conductor layer, characterized in that the conductive carbon layer is coated on the surface of the silicon-based material, and the fast ion conductor layer is coated on the surface of the conductive carbon layer; the fast ion conductor layer is a porous structure. The physical position of the porous fast ion conductor layer is an excellent conductor of lithium ions and stabilizes the SEI film, thereby improving the cycle performance of the material; the pore position exposes the inner carbon layer, increasing the electronic conductivity; at the same time, the pore position reserves expansion space, which is conducive to buffering the expansion of the silicon-based core. The above-mentioned negative electrode material can be used to prepare lithium-ion batteries with high energy density and rapid charge and discharge.

The invention provides an aqueous cadmium ion-vanadium dioxide battery as well as a preparation method and application thereof, and relates to the field of ocean energy storage. The battery comprises a negative electrode, a positive electrode, a diaphragm and an aqueous electrolyte, the negative electrode is metal cadmium or cadmium-based alloy; the active material of the positive electrode is metastable monoclinic phase vanadium dioxide; the diaphragm is a glass fiber diaphragm; the aqueous electrolyte is an aqueous solution containing cadmium salt; the total concentration of the cadmium salt in the aqueous electrolyte is 1-4 mol / L. The aqueous vanadium dioxide-cadmium metal secondary battery disclosed by the invention has the advantages of safe aqueous electrolyte system, high rate capability, ultra-long cycle life and the like, and has remarkable advantages when being applied to ocean energy storage.

The invention discloses special steel sand for a 3D printing metal casting mold and a preparation method of the special steel sand, belongs to the technical field of steel sand processing, and aims to solve the technical problems of poor dimensional stability of a sand mold at a high temperature and poor collapsibility of the sand mold added with the steel sand due to thermal expansion coefficient difference between the steel sand and standard sand in the prior art. The method comprises the following steps that steel grit, absolute ethyl alcohol and KH-560 are added into a reaction kettle to be stirred, the temperature of the reaction kettle is increased to 50-55 DEG C, and a sodium hydroxide solution is added into the reaction kettle. After the element composition and particle size distribution of the steel grit are optimized and the steel grit is subjected to surface modification, the modified steel grit is enhanced by using a mixed modification solution, and the strength of the steel grit is improved; and special steel sand is prepared and mixed with standard sand for 3D sand mold printing, so that the normal-temperature compressive strength and dimensional stability of the sand mold are effectively enhanced, and the collapsibility of the sand mold is also improved.

Nitrogen-doped hollow mesoporous carbon nanosheets and their preparation methods and applications in potassium ion batteries, the nitrogen-doped hollow mesoporous carbon nanosheets include a carbon shell and a reduced graphene oxide wrapped therein; the carbon shell is covered with mesopores vertically connecting the inner and outer walls. The preparation method is as follows: tetrapropoxysilane is subjected to a hydrolysis and polycondensation reaction in a graphene solution to obtain a silicon dioxide nanosheet template, resorcinol and formaldehyde are used as carbon source precursors, ammonia water is used as an alkaline catalyst and a nitrogen source, and tetrapropoxysilane is used as a pore-forming agent to carry out a resorcinol-formaldehyde resin coating reaction, the product is subjected to high-temperature calcination, and finally etching is performed to remove the silicon dioxide nanosheets. The nitrogen-doped hollow mesoporous carbon nanosheets provide a considerable mass specific capacity and exhibit excellent rate performance and cycle stability, and can be used as an ideal carbon-based current collector material for potassium ion negative electrodes, and then used to construct safe, high mass specific capacity and long cycle life potassium ion batteries.

The invention relates to the technical field of lithium batteries, and provides a lithium ion secondary battery. In the lithium ion secondary battery, a negative plate comprises a silicon carbon material; the silicon-carbon material comprises a porous carbon substrate and a silicon material distributed in pores of the porous carbon substrate; the open pore volume of the silicon carbon material is recorded as V cm < 3 > / g; the electrolyte comprises a first additive and a second additive, the first additive comprises ethyl 2, 2-difluoroacetate and / or a derivative thereof, and the second additive comprises 1, 1, 2, 2-tetrafluoroethyl-2, 2, 3, 3-tetrafluoropropyl ether and / or a derivative thereof; the mass ratios of the first additive and the second additive are respectively recorded as A1% and A2%; a1 and A2 satisfy 5 < = A1 + A2 < = 30; and V is more than or equal to 0.0001 and less than or equal to 0.1, so that the low-temperature performance of the battery can be effectively improved, the high-temperature performance of the battery is considered, and the cycle performance of the battery is improved.

The invention relates to the field of sodium ion batteries, in particular to a hard carbon negative electrode material of a fast-charging sodium ion battery and a preparation method of the hard carbon negative electrode material, which are used for solving the problem that the popularization of the sodium ion battery in practical application is limited due to the defects of low capacity and poor cycle performance of the existing hard carbon negative electrode material of the fast-charging sodium ion battery. The nickel-cobalt metal oxide is doped into the nitrogen-containing hard carbon microspheres, so that the conductivity and reaction kinetics of the material can be improved, the theoretical capacity of the material is further improved, the charge-discharge rate of the sodium-ion battery can be remarkably improved, and the electrochemical performance of the battery is enhanced; and after being coated by the composite gel structure, the composite gel structure can effectively improve the structural stability of the material, reduce the volume change of the material in the cycle process, remarkably improve the cycle stability of the sodium-ion battery, and maintain longer cycle life and higher capacity retention rate while realizing quick charging. The service life of the battery is prolonged.

This invention provides a silicon-based anode composite material, its preparation method, and its application. The silicon-based anode composite material comprises a silicon-based core, a boronoxy lattice stabilizer, and an inert material. At least a portion of the boronoxy lattice stabilizer is embedded in the lattice structure of the silicon-based core, and the inert material coats the surface of the silicon-based core. This invention helps improve the initial coulombic efficiency and cycle performance of the silicon-based anode composite material.

The invention relates to the field of sodium-ion battery positive electrode materials, in particular to a sodium-ion battery layered oxide positive electrode material and a preparation method thereof, and aims to solve the problem that the battery performance is remarkably reduced due to the fact that an existing sodium-ion battery layered oxide positive electrode material is prone to phase change and cracks in the circulation process. The layered oxide positive electrode material of the sodium-ion battery is composed of a composite layered oxide and a polycarbazole protective layer, the composite layered oxide is composed of more than two metal ions, the electrochemical performance is excellent, after polycarbazole is wrapped as the protective layer, direct contact between the composite layered oxide and electrolyte can be effectively isolated, and the service life of the sodium-ion battery is prolonged. According to the present invention, the polycarbazole can be used as the positive electrode material, the volume change caused by the non-uniform intercalation and deintercalation of sodium ions during the charge-discharge process can be inhibited, and the fluorine atoms in the polycarbazole protection layer can provide the excellent high-temperature stability and the excellent chemical stability, such that the protection effect is good, and the cycle stability of the positive electrode material is further improved.

This invention relates to the field of solid-state electrolyte battery technology, specifically to a 4D-printed gel solid-state electrolyte, a printing method, and a solid-state battery. This application utilizes 3D printing technology to pre-construct a solid-state electrolyte composed of an insoluble polymer framework and a soluble polymer functional phase. When a trace amount of electrolyte is introduced, this structure undergoes a predetermined, controllable evolution over time—the soluble components rapidly dissolve and gel in situ, dynamically coating the surface and pores of the insoluble framework, thereby forming a gel electrolyte that combines a stable three-dimensional framework with a high ionic conductivity gel interface layer. This achieves a 4D-printed gel solid-state electrolyte. This 4D-printed gel solid-state electrolyte effectively buffers volume changes and significantly reduces interfacial impedance. Simultaneously, its insoluble framework ensures mechanical strength and dimensional stability, while the extremely low electrolyte usage fundamentally improves battery safety and cycle performance.

The invention discloses an epoxy adhesive for a semiconductor cutting spliced rod and a preparation method of the epoxy adhesive, and relates to the technical field of epoxy adhesives. According to the epoxy glue for the semiconductor cutting splicing rod, under the compounding of the component A (mainly comprising POSS-epoxy and phenolic epoxy) and the component B (mainly comprising POSS-sulfydryl curing agent and modified amine curing agent), all the components have a synergistic effect, the structure of the obtained glue is similar to that of a semiconductor silicon wafer or silicon carbide after curing, and the adhesive has the advantages that the adhesive has a good adhesive force; the compatibility of the epoxy glue and a semiconductor material can be improved; the POSS-sulfydryl epoxy curing agent and the modified amine curing agent are selected to be matched with the epoxy resin, so that a bonding interface can be better filled, the hardness and strength of the cured adhesive are close to those of a semiconductor material and crystal characteristics, the cured adhesive has higher glass transition temperature, the hardness is slightly influenced by temperature in the cutting process, and the service life of the adhesive is prolonged. And the tungsten filament steel wire can pass through more smoothly, the wire bow is reduced, and the cutting yield is improved.

The invention relates to the field of new energy, in particular to a negative pole piece, a preparation method of the negative pole piece and a battery. The negative pole piece comprises a current collector and a negative active material layer arranged on the surface of the current collector; the negative electrode active material layer comprises a porous material and an alloy material filled in pores of the porous material; the alloy material comprises a Na-K-M ternary alloy, and a metal element M contained in the Na-K-M ternary alloy is selected from one of the IIA family and the IIIA family. When the negative pole piece is applied to the lithium ion battery, the electrochemical performance is remarkably improved.

The invention belongs to the technical field of lithium ion battery negative electrode materials, and particularly relates to a nanometer silicon inlaid silicon monoxide / carbon composite negative electrode material and a preparation method thereof. The preparation method comprises the following steps: by taking hydrophobic nano silicon dioxide and asphalt as main raw materials, dissolving the asphalt in carbon tetrachloride, mixing the nano silicon dioxide with an asphalt solution, and carrying out heat treatment to prepare carbon-coated silicon dioxide powder; mixing the carbon-coated silicon dioxide powder with aluminum powder, potassium chloride and anhydrous aluminum chloride, and reducing to obtain carbon-coated nano silicon inlaid silicon monoxide powder; mixing the carbon-coated nano-silicon inlaid silicon monoxide with the asphalt carbonization product, and carrying out ball milling; and mixing the ball-milled product with asphalt, styrene and imidazoline, carrying out ball milling in a carbon tetrachloride medium, and carrying out heat treatment on the ball-milled product to prepare the nano silicon inlaid silicon monoxide / carbon composite negative electrode material. The method disclosed by the invention is simple in process, relatively low in cost, environment-friendly and easy to realize large-scale production, and the prepared negative electrode material has excellent electrochemical performance.

The invention relates to a preparation method and application of a binary formula Dai pottery pug. The preparation method comprises the following steps: taking Dai pottery clay in the HongRiver basin, Wuhua soil in the HongRiver county and charcoal dust, and exposing and weathering the Dai pottery clay and the Wuhua soil for at least three months; the mass content of SiO2 in the Dai clay in the HongRiver basin is not less than 50%, the mass content of Al2O3 is not less than 15%, the mass content of Fe2O3 is not less than 10%, and the ignition loss is less than 10%; the content of SiO2 in the Wuhua soil in the Honghe county is 72%-82%, the content of Al2O3 is 9%-12%, and the content of Fe2O3 is 3%-5%; the preparation method comprises the following steps: adding water into the Dai pottery clay and the Wuhua soil according to the mass ratio of the Dai pottery clay to the Wuhua soil to the charcoal powder of (100-120): (40-50): (8-10), fully soaking, then carrying out ball milling, sieving slurry, then adding the charcoal powder, uniformly stirring, squeezing mud, draining, pugging and exhausting. According to the invention, the throwing and compression molding performances of the Dai pottery clay can be improved, the sintering temperature and the compactness and strength of the structure of the Dai pottery clay can be improved, and the burn out rate can be reduced.