87results about How to "Improve electronic conductivity" patented technology

The invention relates to the field of lithium ion batteries, and discloses a lithium titanate composite material and a preparation method thereof, a negative pole piece and a preparation method thereof, a lithium battery and a battery pack. The surfaces of lithium titanate particles are sequentially coated with the nitrogen-doped carbon intermediate layer and the two-dimensional MXene material outer layer, and the MXene material outer layer is formed by bridging adjacent particles through hydrogen bonds, so that a'core-shell-bridge 'three-dimensional conductive network structure is constructed, the electronic conductivity of the lithium titanate composite material is remarkably improved, the electron / ion transmission efficiency of the lithium titanate negative electrode is improved, and the lithium titanate negative electrode has a good application prospect. The lithium ion battery has excellent rate capability and cycle performance; and through collaborative optimization of the three-dimensional composite material and the electrolyte, the interface impedance is reduced, and polarization is inhibited, so that the lithium battery still keeps high capacity and long cycle stability under ultrahigh rate, and meanwhile, the problems of discontinuous conductive network and high interface impedance in the prior art are solved. And excellent rate capability and cycle performance can be achieved under ultrahigh rate.

The application provides a high-nickel ternary material modification method and a high-nickel positive electrode material with a nitrogen-oxygen coating layer, and relates to the field of lithium ion batteries. In the high-nickel ternary material, surface lattice oxygen is gradually replaced by nitrogen atoms in a high-temperature long-time calcination process in a nitrogen-oxygen mixed atmosphere, so that a nitrogen-oxygen layer is formed on the surface, which is beneficial to the delocalization of electrons, thereby endowing the material with excellent electronic conductivity; meanwhile, the presence of the nitrogen-oxygen layer inhibits the transformation of the surface layer structure into a rock salt phase structure, which is beneficial to realizing efficient ion transport. The formation of the nitrogen-oxygen layer on the surface of the high-nickel ternary material can simultaneously improve the electronic and ionic conduction of the surface of the high-nickel positive electrode material, inhibit the interface side reaction, relieve the volume change, and thereby improve the cycle stability of the battery.

The application discloses a preparation method of nitrogen-doped carbon-silicon nanofibers and application of the nitrogen-doped carbon-silicon nanofibers in a lithium ion battery negative electrode material, and belongs to the technical field of lithium ion battery negative electrode materials. The method comprises the following steps: mixing silicon nanoparticles and a carbon source, performing electrostatic spinning, stabilization treatment and carbonization treatment, and obtaining carbon-silicon nanofibers; and then mixing the carbon-silicon nanofibers with a nitrogen source, performing heat treatment under an inert atmosphere, making nitrogen elements doped into a carbon skeleton, and obtaining nitrogen-doped carbon-silicon nanofibers. The material obtained by the application is a one-dimensional nanofiber structure, silicon particles are uniformly wrapped in carbon fibers, and nitrogen elements are uniformly distributed in the carbon skeleton. The method can realize uniform nitrogen doping while maintaining the microstructure of the material, and significantly improves the electronic conductivity and interface stability of the material. The material obtained by the application is used as a lithium ion battery negative electrode, and exhibits high reversible capacity and excellent cycle stability.

The application relates to the technical field of battery materials. Disclosed are a lithium nickel-manganese acid positive electrode material, a preparation method thereof, a positive electrode and a battery. The lithium nickel-manganese acid positive electrode material comprises a base material and a first coating layer and a second coating layer successively coated on the surface of the base material; the chemical general formula of the base material is Li(Li a Ni b Mn c Fe d Sb e )O 4‑x , wherein a+b+c+d+e=2, 0<=x<=0.2, 0<=a<=0.1, 0.4<=b<=0.5, 1<=c<=1.5, 0.1<=d+e<=0.4; the first coating layer comprises NbTi(PO4)3, and the mass ratio of the first coating layer to the base material is 0.1-5:100; the second coating layer comprises a carbon material, and the mass ratio of the second coating layer to the base material is 0.1-5:100. The lithium nickel-manganese acid positive electrode material provided by the embodiment of the application has excellent electrochemical performance.

The application belongs to the technical field of all-solid-state lithium-sulfur battery materials, and relates to a lithium sulfide nano composite positive electrode material with high reaction kinetics and a preparation method and application thereof. The application aims to solve the deficiencies of the lithium sulfide positive electrode material in ion and electron conductivity, reduce the activation barrier of the lithium sulfide positive electrode material, improve the battery redox kinetics, and further improve the rate performance and cycle capacity of the battery. The lithium sulfide nano composite positive electrode material is prepared by using an in-situ synthesis method, the obtained composite material has rich metal atom crystals embedded in the lithium sulfide matrix, and a layer of amorphous carbon is uniformly coated on the surface. The finally obtained lithium sulfide nano composite positive electrode material exhibits high reversible capacity and excellent rate performance. The application has the characteristics of uniform coating and simple process, is suitable for large-scale production, and has a wide application prospect in the field of all-solid-state lithium-sulfur batteries.

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.

This invention belongs to the field of lithium battery material technology, specifically relating to a metal oxide / mesoporous manganese dioxide / conductive polymer composite material, its preparation method, and its application. The preparation method includes the following steps: 1) ball milling a commercial metal oxide; 2) mixing the metal oxide powder with an organic polymer monomer and a methyl orange solution and ultrasonically dispersing the mixture to obtain a liquid mixture; 3) adding a potassium permanganate solution to the liquid mixture and performing a high-pressure hydrothermal reaction under stirring to obtain the composite material; 4) subjecting the composite material to alkali treatment, filtering, washing with water, and drying to obtain the metal oxide / mesoporous manganese dioxide / conductive polymer composite material. This metal oxide / mesoporous manganese dioxide / conductive polymer composite material can be used to prepare lithium battery cathode materials with high specific capacity, high conductivity, and high stability in a simple, efficient, and low-cost manner. It is easy to industrialize and solves the problems of low conductivity and poor rate discharge performance of traditional metal oxide cathode materials.

The application provides a silicon-carbon composite negative electrode material and a preparation method and application thereof, and belongs to the technical field of new energy materials and electrochemistry. Silicon powder and metal oxide are tightly combined through sand milling to build a continuous and stable structure, the volume expansion of the silicon powder and the metal oxide is inhibited, the stress of the silicon powder is released, then the sand-milled composite slurry is mixed with carbon material, and spray drying granulation and carbonization treatment are performed to prepare the negative electrode material. Based on the mutual stability effect, the application can accommodate and relieve the large volume expansion of the silicon material, and the stability of the material is maintained. The prepared composite negative electrode shows extremely low volume expansion (<20%). The metal oxide in the application has the ability to stabilize the SEI film and improve the conductivity. In combination with the addition of the carbon material, the conductivity of the composite material is synergistically improved, and the electrochemical performance is improved. Therefore, the prepared composite material has high sphericity, high tap density and excellent electrochemical performance.

This invention belongs to the field of sodium-ion battery cathode material technology, and its purpose is to provide a new synthetic technique and process for preparing sodium iron pyrophosphate composite cathode materials using an anhydrous precursor, as well as its application. This patented technology aims to overcome several key problems existing in traditional preparation processes, including the reduction in material crystallinity caused by the evaporation of water of crystallization during calcination, the poor thermal stability of sodium iron sulfate, and the low electronic conductivity of sodium iron pyrophosphate. To effectively address these challenges, this patented technology innovatively proposes a method for preparing bio-carbon-coated Na2Fe2P2O7SO4 composite cathode materials using an anhydrous precursor. This preparation method utilizes iron phosphate as a raw material, optimizes the material synthesis process, and has high feasibility and operability. Experimental results show that this composite material exhibits excellent discharge specific capacity and cycle stability, indicating its promising application prospects in the future energy storage field.

The invention discloses an organic phosphorus wastewater degradation and phosphorus recovery experimental device and method, and particularly relates to the field of organic phosphorus wastewater treatment.The organic phosphorus wastewater degradation and phosphorus recovery experimental device comprises an electric reaction box, a recovery reaction unit capable of performing electrochemical reaction is arranged in the electric reaction box, and a water inlet pipe and a water outlet pipe are arranged between the two sides of the recovery reaction unit and the electric reaction box respectively; the recovery reaction unit comprises a water storage reaction box, a Fe3O4-coated N-GO negative plate and a titanium platinum positive plate are arranged in the water storage reaction box, the Fe3O4-coated N-GO negative plate is used for preparing Fe3O4-coated N-GO by adopting a one-step hydrothermal method, the Fe3O4-coated N-GO is loaded on an electrode, and the Fe3O4-coated N-GO negative plate has excellent electron transfer efficiency and catalytic activity. The organic phosphorus wastewater can be completely degraded within 40 minutes, and the PO4 < 3-> conversion rate is 35%; by constructing a continuous operation system for electrochemical degradation and recovery of the organophosphorus wastewater, efficient degradation and detoxification of the organophosphorus wastewater are realized, released phosphorus is recovered, and the method has practical significance of reducing treatment cost and increasing economic benefits.

This invention provides a carbon coating layer for dry-process electrodes, a dry-process electrode, and a lithium-ion battery. The carbon coating layer includes a binder and a conductive agent, and the binder includes an acrylic resin material. The carbon coating layer for dry-process electrodes provided by this invention has good electronic conductivity, excellent adhesion to dry-process membranes, and good resistance to organic electrolyte corrosion. The dry-process electrode obtained by combining the carbon-coated foil containing the carbon coating layer with the dry-process membrane has good conductivity, the carbon-coated foil and the dry-process membrane are tightly bonded, and it is resistant to organic electrolyte corrosion.

The application belongs to the technical field of iodine-containing wastewater treatment, and specifically provides a method for treating iodine-containing wastewater, which comprises the following steps: mixing a metal-doped bismuth tungstate material for treating iodine-containing wastewater with a binder and a conductive agent to prepare a slurry, coating the slurry on a conductive substrate, and drying to obtain a membrane electrode, and using the obtained membrane electrode to treat iodine-containing wastewater; and a preparation method of the metal-doped bismuth tungstate material for treating iodine-containing wastewater, which comprises the following steps: 1) dissolving bismuth salt and iron salt in a solvent to prepare a mixed solution; 2) adding a tungstate solution to the mixed solution to form a suspension, and then performing a hydrothermal reaction, collecting the precipitate after cooling, and washing and drying to obtain the product. The metal-doped bismuth tungstate material prepared by the application has the advantages of high specific surface area and good photo-assisted electric adsorption performance.

The invention relates to the technical field of negative electrode materials, in particular to a negative electrode material and a battery, the negative electrode material comprises a base material and a silicon material, at least part of the silicon material is located in the base material, and the silicon material comprises a first phase and a second phase; wherein the negative electrode material is measured by a precession electron diffraction method: based on the region where the silicon material is located, the area proportion of the region where the silicon material of the first phase is located is A which is greater than or equal to 70%, and the area proportion of the region where the silicon material of the second phase is located is B which is greater than 0 and less than or equal to 30%. The negative electrode material provided by the invention has low expansion, high capacity and excellent cycle performance.

This invention provides a cathode material, its preparation method, and a lithium-ion battery. The preparation method includes: (1) mixing an organic ligand, a magnesium source, and a solvent, and reacting to obtain a magnesium-based MOF; wherein the molar ratio of the organic ligand to the magnesium source is (1.8-2.3):1; (2) mixing carbon-coated lithium vanadium oxyphosphate, a solvent, and the magnesium-based MOF, and sintering to obtain the cathode material. In the preparation method of this invention, a carbon layer and a magnesium-based MOF layer are sequentially coated on the surface of lithium vanadium oxyphosphate, which can effectively reduce the contact between the cathode material and the electrolyte, suppress its side reactions with the electrolyte, and improve the cycle stability of the material; and can improve the surface porosity, ionic conductivity, electronic conductivity, and Li-ion battery of the material. + The insertion and extraction speed is increased, thereby improving the polarization phenomenon at high magnification and effectively enhancing the rate performance of the material.

This invention discloses a multi-level carbon-coated ternary composite material and its preparation method, comprising the following steps: S1: Nanoscale wet grinding of single-crystal NCM and expanded graphite, allowing NCM to be inserted between the expanded graphite layers, followed by drying to obtain mixture 1; S2: Mixing mixture 1 from S1 with medium-temperature pitch to obtain mixture 2; S3: Low-temperature sintering of mixture 2 obtained in S2, followed by crushing to obtain the multi-level carbon-coated ternary composite material. This invention embeds single-crystal NCM into the expanded graphite layers through grinding, improving the electronic conductivity of NCM and enhancing rate performance. The expanded graphite adapts to the volume expansion of single-crystal NCM during charge and discharge, maintaining close contact between materials, thereby improving cycle life. The secondary coating of the material with low-softening-point medium-temperature pitch further reduces the contact area between single-crystal NCM and the electrolyte, improving cycle stability. The medium-temperature pitch can complete carbonization at a lower temperature, avoiding the collapse of the NCM structure during high-temperature carbonization.

The invention discloses a bamboo-based derived nitrogen-doped hard carbon negative electrode material and a preparation method and application thereof.The preparation method creatively utilizes the characteristic that bamboo wood is rich in natural phenolic hydroxyl groups and comprises the steps that bamboo powder and an aldehyde group compound are subjected to in-situ phenol-aldehyde polycondensation under the alkaline condition, and a cross-linked network precursor is constructed; then adjusting the pH to weak acidity, and carrying out in-situ amination doping with a nitrogen-containing compound; and finally, carbonizing to obtain the nitrogen-doped hard carbon material. According to the method, structural reconstruction and uniform nitrogen doping of the bamboo-based precursor are synchronously realized through two-step continuous molecular-level reaction of'alkaline polycondensation-acidic amination '. When the obtained material is used as a sodium ion battery negative electrode, high reversible specific capacity (greater than 304 mAh / g), high first coulombic efficiency (greater than 92%) and excellent cycling stability (300-week capacity retention rate at 0.5 C is greater than 92%) are shown. The method is simple in process, green, low in cost and suitable for large-scale production.

The invention discloses a preparation method of a carbon-silicon negative electrode material and application of the carbon-silicon negative electrode material in a lithium ion battery. The preparation method comprises the following steps: (1) coating a silicon surface with polybenzoxazine resin; (2) coating the surface of the material obtained in the step (1) with silicon dioxide to obtain a precursor; (3) carrying out confinement pyrolysis on the precursor powder obtained in the step (2) in an argon atmosphere, and naturally cooling; and (4) soaking the sample obtained in the step (3) in an etching solution, and etching the silicon dioxide on the outer layer to obtain the carbon-silicon negative electrode material. According to the obtained carbon-silicon negative electrode material, the problem of a silicon-based negative electrode material of a lithium ion battery is well solved, the latticed porous carbon constructed on the silicon surface provides a buffer space due to huge volume expansion during lithium intercalation, and the conductivity of the material is improved due to a three-dimensional network. The grid carbon structure can synchronously improve the mechanical stability and the ion / electron transmission capability of the silicon-carbon negative electrode material, so that the cycling stability and the rate capability of the silicon-carbon negative electrode material are improved.

This invention provides a battery anode composite material, its preparation method, and its application. The preparation method includes: mixing a bismuth salt, a first metal salt, a carbon source, a template agent, and deionized water to obtain a mixed solution, wherein the first metal is selected from copper, silver, iron, zinc, gold, molybdenum, tungsten, titanium, and vanadium; spray-drying the mixed solution to obtain a precursor; removing the template agent from the precursor; and sintering at high temperature in a protective atmosphere to obtain a bismuth-first metal-carbon composite material or a bismuth-first metal oxide-carbon composite material. The composite material prepared by this invention can significantly alleviate the volume expansion problem of bismuth-based materials during charge and discharge, maintain the structural integrity of the electrode material, prevent the aggregation of bismuth nanoparticles, and thus improve the cycle stability of the anode material.

The invention belongs to the technical field of new energy, and particularly relates to a coated lithium-rich manganese-based positive electrode material as well as a preparation method and application thereof. The preparation method comprises the following steps: S1, mixing an acrylamide polymer and a metal coating agent, and performing spray drying to obtain a mixture; and S2, coating the surface of the lithium-rich manganese-based positive electrode material with the mixture, and sintering to obtain the coated lithium-rich manganese-based positive electrode material. The coated lithium-rich manganese-based positive electrode material provided by the invention has high capacity, high magnification and high cycle performance.

This invention relates to a method for preparing a vanadium selenide / vanadium oxide heterojunction photo-assisted zinc-ion battery, belonging to the technical field of vanadium selenide / vanadium oxide heterojunction photo-assisted electrochemical energy storage and zinc-ion battery. The method includes the following steps: mixing a selenium source solution and a vanadium source solution to obtain a reaction precursor solution; subjecting the reaction precursor solution to a hydrothermal reaction and washing to obtain vanadium selenide material; annealing the vanadium selenide material to form a vanadium oxide layer on its surface, obtaining a vanadium selenide / vanadium oxide heterojunction composite material; mixing the vanadium selenide / vanadium oxide heterojunction composite material, a conductive agent, and a binder, adding a solvent to prepare a slurry, coating the slurry onto the surface of a current collector, and drying to obtain a photocathode. The material and its application system described in this invention exhibit good specific capacity, rate performance, and cycle stability, and demonstrate good energy storage performance under illumination conditions; this invention is beneficial for further reducing electrode polarization and promoting the synergistic enhancement of electron transport and zinc-ion storage.

The invention relates to a step special-shaped battery cell and a preparation method thereof and a step special-shaped lithium ion battery, the step special-shaped battery cell comprises a first battery cell unit and a second battery cell unit which are arranged in a stacked mode, and in the length direction and the width direction, the size of the first battery cell unit is larger than that of the second battery cell unit; the first battery cell unit and the second battery cell unit respectively comprise a first positive pole piece, a second positive pole piece, a first negative pole piece, a second negative pole piece and a diaphragm; the first positive pole piece and the second positive pole piece respectively and independently comprise a first positive active material, and the first negative pole piece and the second negative pole piece respectively and independently comprise a first negative active material; the second positive pole piece further comprises a second positive active material, and the second negative pole piece further comprises a second negative active material. According to the step special-shaped battery cell provided by the invention, by adding the high-rate second positive electrode active material and the high-rate second negative electrode active material, the current bearing capacity of the small second battery cell unit is effectively improved, and the current distribution between the small second battery cell unit and the high-rate second negative electrode active material is improved, so that the capacity retention ratio and the safety performance of the step special-shaped battery are greatly improved.

This application provides a lithium-rich manganese-based cathode material, its preparation method, and an electrochemical device. The lithium-rich manganese-based cathode material includes a substrate material and a coating layer. The coating layer includes a lithium hexafluorozirconate coating layer located on the surface of the substrate material and a fluoride coating layer located on the side of the lithium hexafluorozirconate coating layer away from the substrate material. The chemical formula of the substrate material is Li(Li₂)₃. x Mn a Ni 1‑a‑ b Al b )O 2‑δ Where 0.05≤x≤0.33, 0

The application relates to a tungsten carbonitride substrate-based coherent heterostructure catalyst material and a preparation method thereof, and belongs to the field of catalysts. A solution containing platinum and doped metal salt, namely A solution, is prepared; a reducing agent solution containing a surfactant, namely B solution, is prepared. A WCN substrate sheet is placed in the B solution, the B solution is heated to 220-250 DEG C, then the A solution is gradually added dropwise into the B solution, constant-temperature reaction is carried out until the dropping is completed, stirring and cooling to room temperature, in-situ Pt-based nano-catalyst particles with coherent heterostructure are generated on the WCN nano structure; the catalyst and the substrate material form a coherent interface structure, promote interface charge distribution and transfer, and further improve the activity and stability of the nano catalyst.

The invention relates to the technical field of display, in particular to an organic compound and application thereof. The organic compound provided by the invention has the structure as shown in the formula (1), so that the organic electroluminescent device containing the organic compound has relatively low driving voltage, relatively high current efficiency and relatively long service life.

The invention relates to a titanium dioxide negative pole piece, a preparation method thereof and an aqueous lithium ion battery, and belongs to the field of electrochemical materials. And at least one of the problems of low conductivity, easy agglomeration of nano-particles, poor rate capability caused by serious hydrogen evolution in an aqueous battery, fast cycle capacity fading and the like of the negative plate in the aqueous lithium ion battery in the prior art is solved. The preparation method of the titanium dioxide negative pole piece comprises the following steps: performing electrochemical expansion treatment on graphite paper to obtain expanded graphite paper; carrying out fluorination treatment on the expanded graphite paper; loading titanium dioxide on the fluorinated expanded graphite paper to obtain an active precursor; and combining the active precursor with a current collector to obtain the titanium dioxide negative pole piece. By improving the conductivity of the negative plate, the phenomena of nanoparticle aggregation and hydrogen evolution are reduced, and the rate capability and the cycle capacity retention ratio of the aqueous lithium ion battery are improved.

This invention relates to the field of sodium-ion battery technology, specifically disclosing a sodium iron pyrophosphate (NFPP) cathode material, its preparation method, and its application. The preparation method includes: using iron phosphate as the iron source, mixing it with a specific sodium source, phosphorus source, and composite carbon source; adjusting with deionized water; and then performing precision sand milling to control the slurry particle size D50 within 0.30~0.35 μm to ensure uniform elemental mixing; subsequently, spray drying is performed to obtain a precursor with high sphericity and narrow particle size distribution; finally, programmed sintering is carried out under an inert atmosphere to obtain the final product. This invention solves the problems of uneven elemental distribution, impurity phase formation, low material compaction density, and poor electrochemical performance in existing technologies through synergistic optimization of the entire process chain of sand milling-spray drying-sintering. The obtained NFPP material has a high-purity phase structure. The sodium iron pyrophosphate cathode material prepared by the method of this invention can achieve a 0.1C discharge specific capacity of 101 mA·hg. ‑1 The 1C discharge specific capacity can reach 93 mA·hg ‑1 It is suitable for the preparation of high-performance sodium-ion batteries.

This invention relates to an electroactive porphyrin-based conjugated microporous polymer material, its preparation method, and its applications. The porphyrin-based conjugated microporous polymer is obtained from raw materials containing porphyrin-based monomers and aromatic amine monomers through a coupling reaction. The electroactive porphyrin-based conjugated microporous polymer material of this invention exhibits excellent electrochemical performance as an electrode material. Lithium-ion capacitors constructed using this material possess characteristics such as high specific capacitance, high energy density, fast charging rate, and long cycle life. This invention has good application potential in lightweight, high-specific-energy, fast-charging energy storage devices.

The invention discloses a PEM electrolyzed water catalyst carrier and a preparation method and application thereof. The PEM electrolyzed water catalyst carrier is of a nano needle-shaped structure, the length of the nano needle-shaped structure is 50-200 nm, the diameter of the nano needle-shaped structure is 5-20 nm, and the length-diameter ratio of the nano needle-shaped structure is (10-20): 1; the molecular formula is AxTi (1-x) O2, x is 0.01-0.05, and A is a metal. The catalyst carrier disclosed by the invention is simple in process, low in cost and easy for large-scale production, and the nanostructure and crystalline phase composition of the carrier can be accurately controlled; the catalyst carrier is in a nanoneedle shape, and is high in conductivity, large in specific surface area and excellent in stability; the carrier has the advantages of high catalytic activity, low precious metal consumption and long service life when being applied to a PEM electrolyzed water catalyst.

The application discloses a kind of porous graphite, preparation method and application of silicon-carbon composite material, belong to battery material technical field.The preparation method is: metal, petroleum coke and its dopant are mixed uniformly, pre-carbonization, graphitization, obtain graphite material, then it is etched to pore by plasma technology, then activation, obtain porous graphite;Finally by silane cleavage method, pass in silane mixed gas and carry out nanometer silicon deposition, passivation, then the obtained material is added to the solution of lithium molybdate and lithium sulfonate and coated, spray drying, obtain double lithium compound coated silicon-carbon composite material.The obtained material utilizes the characteristics that porous graphite itself electronic conductivity is high, and the outer layer coated double lithium salt structure improves ionic conductivity and its first efficiency, and plays the synergistic effect between the two, reduces expansion, improves cycle performance.

The present application relates to the technical field of new energy battery, in particular to a coated ternary material mixed with different particle sizes, a preparation method thereof and a battery; the preparation method comprises the following steps: mixing a nickel-cobalt-manganese precursor and a lithium salt, and then mixing the mixture with a gel solution to obtain a premix; mixing a metal oxide with the gel solution to obtain an oxide coating agent; mixing a carbon source with the gel solution to obtain a carbon coating agent; coating the oxide coating agent on the outside of the premix by using an electrospinning method to obtain an oxide-coated ternary material; coating the carbon coating agent on the outside of the premix by using an electrospinning method to obtain a carbon-coated ternary material; sintering the oxide-coated ternary material and the carbon-coated ternary material; mixing and sintering the sintered oxide-coated ternary material and the sintered carbon-coated ternary material; wherein the particle size of the oxide-coated ternary material is larger than that of the carbon-coated ternary material. The preparation method is simple, has fewer processes, and can shorten the preparation time.