33results about How to "Fine surface" patented technology

The invention provides an asphalt-based closed-pore carbon material, a preparation method thereof and a sodium ion battery, the preparation method of the asphalt-based closed-pore carbon material comprises the following steps: S1, pre-oxidizing an asphalt-based carbon source in an oxidizing gas atmosphere at 200-350 DEG C to obtain a pre-oxidized product; s2, carrying out low-temperature carbonization on the pre-oxidized product in an inert atmosphere at 300-800 DEG C to obtain a first precursor; s3, performing gas activation on the first precursor in an activated gas atmosphere to obtain a second precursor; s4, performing chemical activation on the second precursor by adopting a chemical activating agent to obtain a porous carbon material; s5, dipping the porous carbon material in an asphalt solution, and then separating and drying to obtain a blank; and S6, carbonizing the blank under the protection of inert gas to obtain the asphalt-based closed-cell carbon material. The asphalt-based closed-cell carbon material has the advantages of high capacity, high first efficiency and high stable circularity.

The utility model provides electronic component automatic sleeve equipment which comprises a shell installed above a conveying belt, a sleeve used for sleeving electronic components on the conveying belt is inserted in the shell, the shell is fixedly assembled with the conveying belt through a fixing frame on the shell, conveying wheels are arranged on the two sides, located on the sleeve, in the shell, and the conveying wheels are fixedly assembled on the conveying belt through a fixing frame on the shell. And a driving assembly is jointly arranged on the surfaces of the two conveying wheels and used for rotating the conveying wheels to convey the pipe sleeves. According to the device, through the arranged conveying wheels, the conveying wheels are driven above the conveying belt, so that the two driving wheels rotate relatively to achieve downward moving conveying of the pipe sleeve and enable the pipe sleeve to be arranged on the surface of an electric component in a sleeving mode, and meanwhile, the cutting knives are relatively close to achieve cutting of the pipe sleeve in cooperation with starting of an electric push rod; due to the fact that the conveying wheels, the auxiliary wheels and the auxiliary rollers are matched with one another, the whole pipe sleeve can be kept straighter during insertion, the pipe sleeve can be inserted more easily, and protection of the pipe sleeve is facilitated.

The invention discloses a high-oxygen steel submerged nozzle as well as a preparation method and a use method thereof. A nozzle body comprises the following components: 31%-35% of C, 49%-54% of Al2O3 and 13%-16% of SiO2; the composite layer comprises the following components in percentage by weight: 26%-30% of MgO and 70%-74% of Al2O3; a coating is attached to the surface of the composite layer and comprises the following components: more than or equal to 99% of MgO; and the slag line part is made of a zirconium carbon material. The preparation method of the water gap comprises the steps of burdening, mixing, forming and firing. The obtained submersed nozzle product is preheated and cast-on for use, continuous casting of 1600-2000 tons of molten steel can be achieved for steel with the oxygen activity controlled to be 1.5 * 10 <-4 >-3.0 * 10 <-4 >, the inner surface of the refractory material is good, the situation that small pieces of the refractory material enter the molten steel after being eroded to form inclusions is avoided, meanwhile, the situation that after the submersed nozzle is eroded, the structural size in the nozzle changes can be prevented, and the service life of the submersed nozzle is prolonged. And therefore, the quality of the continuous casting billet is ensured.

The invention discloses a sanitary ceramic and a preparation method thereof, and belongs to the technical field of ceramics, the sanitary ceramic comprises a ceramic body and a glaze layer, the glaze layer is prepared from the following raw materials in parts by weight: 30 to 35 parts of feldspar, 23 to 26 parts of quartz, 10 to 15 parts of calcite, 5 to 8 parts of dolomite, 6 to 9 parts of zirconium silicate, 3 to 6 parts of zinc oxide, 2 to 3 parts of aluminum oxide, 1 to 3 parts of frit, 0.5 to 2 parts of modified silicon carbide whisker and 0.05 to 0.1 part of dispersing aid. The preparation method comprises the following steps: 1, preparing a sanitary ceramic green body; step 2, carrying out ball milling on the frit in advance according to parts by weight, then adding the rest raw materials, mixing, adding water, continuously carrying out ball milling, and then removing iron and sieving to obtain glaze slip; step 3, uniformly spraying the glaze slip on a sanitary ceramic green body to obtain a glazed green body; and step 4, performing glaze firing on the glazed green body to obtain the sanitary ceramic which is smooth and glossy in appearance and has good anti-pollution and antibacterial effects.

The utility model discloses a glass fiber wiredrawing coiling device which comprises a rotating disc installed on the front side of a glass fiber wiredrawing machine body, the rotating disc is rotationally connected to the front side of the glass fiber wiredrawing machine body, two yarn coiling column base plates are rotationally connected to the front side of the rotating disc, and a center column is welded to the front side of each yarn coiling column base plate. An air cylinder is fixedly installed on the front side of the center column, the output end of the air cylinder is fixedly connected with an installation block, and eight winding drum clamping plates are slidably connected to the front side of the yarn winding column base plate. The mounting block is driven by the air cylinder to slide back and forth, so that the winding drum clamping plate is driven to slide on the front side of the yarn winding column base plate, winding drums with different diameters are clamped, the winding efficiency of glass fiber filaments is improved, meanwhile, due to the arrangement of the recycling drawer, the falling glass fiber filaments can be recycled, and waste is avoided.

The invention provides lithium strip preparation equipment and a preparation method thereof, relates to the technical field of battery material processing, and is used for improving the preparation efficiency of a surface alloying lithium strip. The lithium strip preparation equipment comprises a rolling device used for pressing a to-be-processed lithium strip; the heating device comprises a heating box body, an input roller and an output roller, the heating box body is provided with a heating space, the input roller and the output roller are both located in the heating space, the input roller is used for feeding a lithium strip to be processed into the heating space, and the heating box body is used for heating the lithium strip located in the heating space into a lithium alloy strip; the output roller is used for sending the lithium strip to be processed out of the heating space; the stripping device comprises a first stripping roller, a second stripping roller and a third stripping roller, the first stripping roller is used for stripping the first release film, the second stripping roller is used for stripping the first metal belt, and the third stripping roller is used for stripping the second release film; and the winding device is used for winding the lithium alloy strip.

The invention belongs to the technical field of axial flow fans, and mainly relates to a compact, efficient and low-noise closed axial flow fan and an impeller of the compact, efficient and low-noise closed axial flow fan. The chord length of the blades, the projection of the blade stacking line on the meridian plane and the projection of the blade stacking line on the plane perpendicular to the rotating shaft of the impeller are restrained. The axial flow fan comprises a plurality of guide vanes and the impeller, the guide vanes are distributed in a circumferential array mode, a motor is fixed to the guide vanes, and the motor is in transmission connection with the hub to drive the impeller to rotate. Through the constraint of a chord length equation of the blade, the maximum chord length of the blade is located in the middle, acting is prevented from being concentrated on the blade top, turbulent kinetic energy of air is reduced, noise can be reduced, meanwhile, the surface, the front edge and the tail edge of the blade are optimized, and the blade is more suitable for air flowing.

This application relates to the field of communication technologies, and discloses a captive elastic assembly, a heat dissipation apparatus, an electronic device, and a circuit module and an assembly method thereof. After a connecting component and a fastening component in the captive elastic assembly have been mounted, an anti-stripping spacing for preventing a second member from being stripped from a first member can be formed by a nail body, an elastic element, and an anti-stripping member in the connecting component, then a fixed spacing for fastening the second member to a third member can be formed by the fastening component and the nail body in the connecting component, and finally an elastic spacing for elastically combining the first member to the second member, that is, elastically combining the first member to the third member is formed by the fastening component and the nail body and the elastic element in the connecting component. When the captive elastic assembly implements the foregoing three functions, a quantity of holes on a circuit board for mounting the foregoing connecting pieces is reduced maximally, thereby improving utilization of a surface of the board and improving flexibility of high-density layout of the board.

The present invention relates to a production method for improving the surface and edge quality of silicon steel, comprising: 1) preparing a protective coating; the protective coating is composed of material A and material B, material A is plastic particles, and material B is continuous casting crystallizer protective slag; 2) spraying the protective coating evenly onto the surface of the silicon steel slab before loading the furnace; 3) heating the silicon steel slab in the furnace; 4) descaling the silicon steel slab with high-pressure water after it is taken out of the furnace. The present invention sprays the protective coating before heating the silicon steel slab, heats the slab under a corresponding heating system, reduces burn loss and heating quality defects, and can especially improve the surface and corner decarburization problems of high-silicon products, improve the subsequent processing capacity of the steel plate, reduce edge cutting, and reduce the occurrence of broken belt accidents, thereby producing high-quality and high-yield cold-rolled non-oriented silicon steel products.

In order to provide artificial leather having both strength (in particular, tensile strength and tear strength), surface appearance, and a dense feeling in artificial leather including a fiber-entangled body containing a nonwoven fabric made of ultrafine fibers containing a large amount of inorganic particles (in particular, metal compounds) as a constituent element, and an elastic polymer, the artificial leather of the present invention is artificial leather including a fiber-entangled body containing a nonwoven fabric made of ultrafine fibers having an average single fiber diameter of 1.0 um or more and 10.0 um or less as a constituent element and an elastic polymer, and satisfies the following requirements: (1) the ultrafine fibers include a polyester-based resin containing a manganese-based compound; (2) an average particle diameter of the manganese-based compound is 0.01 um or more and 0.20 um or less; and (3) the ultrafine fibers contain a manganese element in an amount of 0.1 ppm or more and 50.0 ppm or less in 100 mass% of the ultrafine fiber.

The invention discloses a glue-free PET (Polyethylene Terephthalate) composite PVC (Polyvinyl Chloride) film and a preparation method thereof. The glue-free PET composite PVC film is prepared from the following components in parts by mass: 100 parts of PVC resin, 16 to 50 parts of plasticizer, 2 to 8 parts of stabilizer, 0.5 to 2 parts of processing aid, 0.5 to 2 parts of anti-ultraviolet agent and 2 to 10 parts of anti-impact modifier. According to the adhesive-free PET composite PVC film and the preparation method thereof provided by the invention, the polyester plasticizer with high molecular weight is adopted, and the anti-ultraviolet agent is compounded and added, so that the weather resistance and the ultraviolet resistance of the PVC film can be improved; and the acrylate impact modifier is adopted, so that the processability of the product and the toughness of the finished product can be improved. The PET is directly compounded in the PVC calendering production process, so that the double-sided highlight effect of the PVC film is realized, the transparency of the product is high, and the extinction problem in the industry is solved.

The present invention relates to a thermoplastic polyester elastomer resin composition, a method of preparing the same, and a molded article including the same. More particularly, the present invention relates to a thermoplastic polyester elastomer resin composition including 89 to 96 % by weight of a thermoplastic polyester elastomer resin (A); 1.5 to 5.5 % by weight of a glycidyl group-modified olefin-based rubber polymer (B); and 1.5 to 5.5 % by weight of an ionomer resin (C), a method of preparing the thermoplastic polyester elastomer resin composition, and a molded article including the thermoplastic polyester elastomer resin composition. The present inventor has an effect of providing a high-quality thermoplastic polyester elastomer resin composition having excellent mechanical properties and moldability; being capable of suppressing occurrence of flow marks on the inner surface of a molded article; and thus being applicable to a constant velocity joint boot, a method of preparing the thermoplastic polyester elastomer resin composition, and a molded article including the thermoplastic polyester elastomer resin composition.

There is provided a laminate having a layer A on at least one side of a base material, in which the layer A contains at least aluminum (Al) and oxygen (O), and when a site corresponding to 5.0 to 25.0%, a site corresponding to 40.0 to 60.0%, and a site corresponding to 75.0 to 95.0%, in terms of length in a depth direction in the layer A, are defined as an X portion, a Y portion, and a Z portion, respectively, there are sites having a different composition ratio O / Al of aluminum (Al) and oxygen (O). There are provided a laminate that exhibits high productivity and less variation in gas barrier properties even with a thin film configuration, and a method for manufacturing a laminate.

The invention relates to a hot-dip galvanized aluminum magnesium coated steel plate with a fine surface and a preparation method thereof, and belongs to the technical field of coating and plating. The coated steel plate comprises a steel substrate and a zinc-aluminum-magnesium coating attached to at least part of the surface of the steel substrate, and the zinc-aluminum-magnesium coating comprises the following chemical components in percentage by mass: 2-7% of Mg, 5-14% of Al, 0.05-1% of Si, 0.05-0.5% of Fe and Zn; the surface of the zinc-aluminum-magnesium coating contains alpha-Al dendritic crystals, and the average length of primary dendritic crystal arms of the alpha-Al dendritic crystals is smaller than or equal to 50 micrometers. By accurately controlling the contents of main elements such as Mg, Al, Si and Fe in the zinc-aluminum-magnesium coating and adding trace elements such as Sr, Zr, Ce, La, B, Ti, Ca and Y when necessary, the chemical composition of the coating can be optimized, so that the primary dendritic arm length of alpha-Al dendritic crystals in the forming process of the coating is obviously reduced, and the finally obtained steel plate has excellent properties such as fine surface, high flatness and high corrosion resistance.

A positive electrode active material for a secondary battery according to an embodiment of the present invention comprises a lithium composite oxide represented by chemical formula 1 and containing a layer-structured lithium excess oxide, wherein the lithium composite oxide comprises a secondary particle; the secondary particle comprises at least one primary particle; the primary particle comprises at least one crystallite; at least one selected from the secondary particle, the primary particle, and the crystallite comprises a core and a shell occupying at least a portion of the surface of the core; and when the number of moles of at least one element having an oxidation number, selected from among nickel (Ni), cobalt (Co) and manganese (Mn) relative to the total number of moles of M1 and M2 in chemical formula 1 is Mp+ / M, the Mp+ / M in the core differs from that in the shell in the secondary particle: [Chemical formula 1] rLi2M1O3·(1-r)LiaM2O2.

Provided is a sliding component capable of suppressing a rise in sliding surface temperature. Sliding components 10 and 20 have sliding surfaces 11 and 21 sliding relative to each other. A base material 22 of the sliding component 20 is directly coated with a thin film 30 mainly made of glassy carbon, and the sliding surface 21 is formed by the thin film 30.

There is provided an aluminum-ceramic bonded substrate in which an aluminum plate comprising aluminum alloy is directly bonded to one surface of a ceramic substrate and an aluminum base plate comprising aluminum alloy is directly bonded to the other surface of the ceramic substrate, wherein the aluminum alloy is the aluminum alloy containing 0.05% by mass or more and 3.0% by mass or less of at least one element selected from nickel and iron in total amount, containing 0.01% by mass or more and 0.1% by mass or less of at least one element selected from titanium and zirconium in total amount, and containing 0% by mass or more and 0.05% by mass or less of at least one element selected from boron or carbon in total amount, with a balance being aluminum.

The invention discloses an electrolyte of a lithium iron phosphate battery and the lithium iron phosphate battery, belongs to the technical field of power batteries, and overcomes the defect that the lithium iron phosphate battery in the prior art is relatively poor in multiplying power and rapid charging performance. The electrolyte of the lithium iron phosphate battery comprises an electrolyte, a solvent and a first additive, the solvent comprises an organic solvent I; and based on the total mass of the electrolyte, the content of the organic solvent I is more than 30%. According to the electrolyte, the rate capability and the cycle performance of the lithium iron phosphate battery can be remarkably improved, and meanwhile, the lithium iron phosphate battery has good high-temperature performance and low-temperature performance.

The present invention provides a platinum-based alloy protective sleeve and a preparation method thereof, comprising the steps of vacuum melting, hot forging, plate rolling, tube making, precision drawing, head sealing, calendering and the like. By improving the chemical composition of the dispersant in the raw material and the process, the precision drawing and head sealing processes are improved, so that the surface of the precious metal protective sleeve is bright, the sealing is excellent, the dimensional accuracy of the inner and outer diameters and the wall thickness is high, the service life is long, etc.

The invention discloses an injectable hydroxyapatite filler and a preparation method thereof, and belongs to the field of biological materials. The preparation method of the injectable hydroxyapatite filler comprises the following steps: calcining and crushing animal-derived bones to obtain natural hydroxyapatite, mixing and stirring the natural hydroxyapatite and a pore-foaming agent in a thickening solution to form hydroxyapatite slurry, spray-drying and granulating the hydroxyapatite slurry to obtain hydroxyapatite microspheres, and drying the hydroxyapatite microspheres to obtain the injectable hydroxyapatite filler. Then, the hydroxyapatite microspheres are calcined, and porous hydroxyapatite is obtained; then carrying out epoxidation to obtain epoxidized hydroxyapatite; the preparation method comprises the following steps: cross-linking polyethylene glycol and guar gum to obtain a polyethylene glycol-guar gum prepolymer, and then carrying out amination to obtain an aminated polyethylene glycol-guar gum prepolymer; the epoxidized hydroxyapatite, the aminated polyethylene glycol-guar gum prepolymer and the collagen aqueous solution are mixed and oscillated, and the injectable hydroxyapatite filler is obtained. The preparation method has the advantage that the mechanical property and biocompatibility of the hydroxyapatite are improved.

The invention discloses polyester resin for indoor powder coating as well as preparation and application thereof, and belongs to the technical field of polyester resin. The polyester resin comprises the following raw material components in percentage by mass: 32.0-45.0% of linear aliphatic dihydric alcohol with a side group; 1.0 to 2.5 percent of a branching agent; 0 to 1.5 percent of aliphatic cyclic dihydric alcohol; 45 to 58 percent of aromatic polybasic acid; 0 to 1.5 percent of alicyclic polybasic acid; 1.0-6.0% of an end-capping reagent A saturated long straight chain single fatty acid; 4.0 to 8.0 percent of end-capping reagent B isophthalic acid; 1.0-3.0% of an auxiliary agent A hydroxyl acrylic resin; 0.03 to 0.5 percent of an auxiliary agent B; and 0.05 to 0.15% of an esterification catalyst. According to the polyester resin for the indoor powder coating, a main chain structure, a branched structure and an end-capping structure of the polyester resin are improved, and the hydroxyl acrylic resin is added, so that the polyester resin can be cured with a TGIC (or HAA) curing agent, a cured coating film has the advantages of excellent leveling property, excellent boiling resistance, fine surface and the like, and can replace a polyester / epoxy powder coating system; therefore, the residues of bisphenol A and trimellitic anhydride in the powder coating are avoided.

The invention belongs to the field of preparation of 3D printing ceramic materials, and particularly relates to a storage method of a high-solid-content electrolyte material photocuring 3D printing green body. The high-solid-content ceramic slurry is subjected to photocuring 3D printing to prepare an electrolyte diaphragm green body, and the compact electrolyte diaphragm is obtained through post-treatment processes such as coating protection, drying, degreasing and sintering. By adopting the post-treatment protection method disclosed by the invention, isolation protection is formed on the surface of the electrolyte diaphragm green body, and cracks caused by volatilization of the electrolyte diaphragm green body are reduced. The method disclosed by the invention is beneficial to intact preservation of the ceramic green bodies in different temperature and humidity environments so as to prepare the ceramic electrolyte membrane with low deformation, high precision and controllable microstructure, so that the preparation elasticity of the photocuring 3D printing ceramic green bodies is improved, and a good preservation effect of the ceramic green bodies can also be achieved when printing parameters are not good.

The invention relates to the technical field of photovoltaics, and discloses a passivation contact solar cell and a preparation method thereof. The preparation method comprises the following steps: providing a substrate layer with a first surface and a second surface which are opposite; forming an oxide layer on the first surface of the substrate layer; performing laser sintering treatment on the surface of the oxide layer; forming a first doping layer on the oxide layer after laser sintering treatment; forming a second doping layer on the second surface of the substrate layer; and forming a first electrode connected with the first doping layer on one side of the first surface of the substrate layer, and forming a second electrode connected with the second doping layer on one side of the second surface of the substrate layer. According to the invention, the laser sintering treatment is carried out on the oxide layer to realize accurate optimization of the surface of the oxide layer and improve the surface and interface characteristics, so that the surface recombination rate of the oxide layer and the substrate layer and the first doping layer is reduced, the service life of a carrier is prolonged, the photoelectric conversion efficiency and stability of the cell are improved, and the power generation efficiency is improved.

The embodiment of the invention provides a three-clamping-piece preparation method which comprises the steps that a stainless steel band serves as a base material, and the three-clamping-piece is obtained through nickel electroplating, heat treatment, copper electroplating, heat treatment, flattening, slitting and cleaning. Wherein the three clamping pieces are of a three-layer structure, namely a nickel layer, a stainless steel layer and a copper layer in sequence; wherein the thicknesses of the nickel layer, the stainless steel layer, the nickel layer and the copper layer are respectively 1-10 microns, 80-210 microns and 10-30 microns, and the total thickness is 90-250 microns; the prepared three-clamping piece has excellent surface and interface stability, specifically, the bending resistance is good, cracks and defects are not generated on the surface after the three-clamping piece is bent by 90 degrees and 180 degrees, the consistency of the surface and the bent position can be kept after the three-clamping piece is stamped into a battery shell, and then bubbles cannot be generated due to the reaction with a test solution in a gas production experiment; in practical application, the stability of chemical reaction in the battery is guaranteed, and the electrochemical performance and safety of the battery are improved.

The invention discloses a P-BN rod-like catalyst for oxidative dehydrogenation of propane as well as a preparation method and application of the P-BN rod-like catalyst, and belongs to the technical field of preparation and application of catalysts. According to the catalyst, melamine is used as a nitrogen source, boric acid is used as a boron source, red phosphorus is used as a phosphorus source, and the P-BN rod-like catalyst is prepared through a two-step method of in-situ self-assembly and high-temperature pyrolysis. Under the conditions of normal pressure and 520 DEG C, the obtained P-BN rodlike catalyst is used for propane oxidative dehydrogenation reaction, and corresponding unsaturated olefin can be prepared with high selectivity. The catalyst prepared by the invention has the characteristics of rod-like structure, high olefin selectivity and long catalytic life, the synthesis method of the catalyst is simple, the raw materials are cheap and easy to obtain, no pollution is caused, and the catalyst has industrial application prospects.

A surface treatment composition of the present invention is a surface treatment composition that are supplied as a vapor to a surface of a wafer having an uneven pattern on the surface and used to form a water-repellent protective film on the surface, the surface treatment composition containing a silylating agent and a solvent, in which the silylating agent contains a trialkylsilylamine, the solvent contains at least one or more selected from the group consisting of glycol ether acetate and glycol acetate, and a total content of the glycol ether acetate and the glycol acetate is 50% by mass or more in 100% by mass of a total amount of the solvent.

The application discloses a sludge brick blank drying method and relates to the technical field of drying. The method comprises the following steps: obtaining a surface evaporation rate and an internal moisture migration rate in a brick blank drying process; comparing the two rates with a preset matching relation algorithm; adjusting and controlling drying conditions according to a comparison result to make the two rates tend to match; and starting a fault-tolerant mechanism to maintain the drying process when data is abnormal or the adjustment and control fails. The application can solve product quality problems caused by the fact that the surface evaporation rate and the internal moisture migration rate do not match in the drying process.

The invention relates to the technical field of concrete preparation, and discloses a concrete preparation device for optimizing steel slag aggregate performance based on laser micropores and magnetic potential control. Comprising a central control module, and a circulating module, a laser micropore module, a screening and weak magnetic supplementing module, an instantaneous pressure dust removal module and a magnetic force position control mixing module which are controlled to work by adopting the central control module. The expansion problem possibly caused by the steel slag is effectively relieved. The distribution uniformity of the steel slag aggregate in the steel slag concrete can be improved, and the uniformity of the steel slag aggregate in the mixing process of the steel slag concrete is optimized, so that the performance of the steel slag concrete is improved. The instant negative pressure effect is generated through rapid pressure relief, dust and fine particles generated by laser drilling are rapidly sucked away, and therefore the purposes of cleaning the surfaces of micropores of the steel slag aggregate and cleaning the micropores are achieved.

The invention discloses a hot-rolled pickled steel plate for a spinning belt pulley and a manufacturing method of the hot-rolled pickled steel plate. The technical problems that an existing hot-rolled pickled steel plate for the spinning belt pulley is large in anisotropy and large in springback amount are mainly solved. According to the technical scheme, the hot-rolled pickled steel plate for the spinning belt pulley comprises chemical components in percentage by weight as follows: 0.008%-0.023% of C, 0.001%-0.034% of Si, 0.1%-0.2% of Mn, smaller than or equal to 0.015% of P, smaller than or equal to 0.0105% of S, 0.015%-0.055% of Al, 0.01%-0.02% of Ti, 0.0005%-0.0020% of B and the balance of Fe and inevitable impurity elements. The metallographic structure of the hot-rolled pickled steel plate is ferrite and a small amount of pearlite, and the hot-rolled pickled steel plate with the thickness of 3.0-5.0 mm | r | is less than or equal to 0.15; the method is mainly used for manufacturing high-precision spinning belt wheels and other components.

The invention belongs to the field of battery materials, and particularly relates to a preparation method of an M2TeO3 internal infiltration heat modified lithium-containing positive electrode active material, which comprises the following steps: mixing the lithium-containing positive electrode active material and M2TeO3, and carrying out heat preservation heat modification at 200-800 DEG C to prepare a modified positive electrode active material; m in the M2TeO3 is at least one of Na, K and Rb. The invention also discloses the material prepared by the preparation method and application thereof. Through combined control of internal infiltration heat modification and parameter conditions, the high-temperature and low-temperature performance of the modified active material can be enhanced based on double-phase exchange migration of components, so that the active material is suitable for wide-temperature-range application requirements, and moreover, the tap density and air-resistant stability of the material can be effectively improved.