34 results about "Zirconium doping" patented technology

The present application relates to a kind of high-temperature-resistant inductive angle sensor, belong to angle sensor technical field.The sensor includes: gradient composite ceramic substrate Al2O3-ZrO2-Al2O3, realize thermal expansion coefficient gradient matching by intermediate layer zirconium oxide doped yttrium oxide, reduce thermal stress cracking risk;Substrate surface is formed with micro-arc oxidation porous layer in turn titanium nitride nanocrystalline layer, improve surface bonding force;Atomic layer deposition process is used to prepare TiN or TiN / Ag composite film coil, improve temperature resistance;Through electron beam welding and transient liquid phase bonding composite process coil and circuit;Insulating encapsulation layer is made of boron nitride nanosheet and high-temperature-resistant resin, improve thermal conductivity and breakdown field strength.The present application is through gradient substrate design, thin film coil integration and composite process optimization, solves the thermal stress failure of traditional inductive sensor under high temperature, coil oxidation and insulation aging problem, suitable for angle measurement under extreme environment.

The application relates to the development and technical field of electrocatalysts, and discloses a benzothiadiazole modified single-atom zirconium-doped metal copper electrode material and a preparation method and application thereof. The preparation method comprises the following steps: dissolving inorganic copper salt and inorganic zirconium salt, adding the inorganic copper salt and the inorganic zirconium salt into an alkaline solution, and performing hydrothermal reaction to obtain a single-atom zirconium-doped copper oxide precursor; dissolving benzothiadiazole, adding the benzothiadiazole into a dispersion solution of the single-atom zirconium-doped copper oxide precursor to obtain a mixed solution; spraying the mixed solution on a polytetrafluoroethylene film substrate loaded with copper nanoparticles to obtain a benzothiadiazole modified single-atom zirconium-doped copper oxide precursor electrode material; and performing electrochemical reduction treatment on the benzothiadiazole modified single-atom zirconium-doped copper oxide precursor electrode material to obtain a benzothiadiazole modified single-atom zirconium-doped metal copper electrode material. The electrode material is applied to an electro-reduction carbon dioxide reaction as a working electrode, exhibits excellent electro-reduction CO2 performance in an acidic environment, and realizes high-value-added C 2+ product with high selectivity.

The invention discloses a high-strength diaphragm for a fast-charging lithium ion battery and a preparation method of the high-strength diaphragm, and belongs to the technical field of battery diaphragms.The preparation method comprises the steps that zirconium-doped boehmite and dopamine are coated to obtain polydopamine-coated zirconium-doped boehmite, the polydopamine-coated zirconium-doped boehmite is compounded with sulfydryl mesoporous nano-silicon dioxide to form nano-reinforced particles, and the high-strength diaphragm is prepared; then mixing the nano reinforced particles, nano cellulose whiskers, an adhesive, deionized water, a silane coupling agent KH-550, a wetting agent, polyvinylidene fluoride and N, N-dimethylformamide to prepare composite slurry; the high-strength diaphragm for the fast-charging lithium ion battery is obtained through coating and thermocuring processes; the high thermal stability, the high mechanical strength, the good electrolyte affinity and the excellent ionic conductivity are achieved, and the safety and the electrochemical performance of the diaphragm in a fast charging scene are remarkably improved.

The invention provides a preparation method and application of an amorphous zirconium-doped manganese oxide catalyst, and belongs to the field of organic catalytic synthesis. The catalyst is Zr-MnO2-x, and is rich in lattice oxygen with high activity and high stability; x is the molar ratio of Zr to the sum of Mn and Zr, and x is larger than or equal to 0.2 and smaller than or equal to 0.6; zirconium mainly exists in the form of zirconium hydroxide. The preparation method comprises the following steps: slowly dropwise adding a mixed salt solution of a zirconium source and a manganese source into a precipitant under a continuous stirring condition, and carrying out a co-precipitation reaction; after the reaction is completed, standing and aging, carrying out solid-liquid separation and collecting a precipitate; and washing and drying to obtain the amorphous zirconium-doped manganese oxide catalyst which is used for catalyzing aniline and derivatives thereof to synthesize azobenzene compounds. According to the invention, the characteristic of'difunctional lattice oxygen 'with high activity and high stability is introduced through zirconium doping, and the catalyst has the advantages of high activity, high selectivity, wide substrate applicability, excellent stability and reusability and the like when used for catalytic synthesis of azobenzene compounds.

The application provides a multiple modified positive electrode precursor, a preparation method of the multiple modified positive electrode precursor, a positive electrode material and a battery, and the multiple modified positive electrode precursor comprises a zirconium-doped precursor core, a zirconium-scandium co-doped precursor transition layer and a scandium-doped precursor coating layer which are sequentially coated on the surface of the zirconium-doped precursor core; the concentration of zirconium elements in the zirconium-scandium co-doped precursor transition layer decreases from the inside to the outside, and the concentration of scandium elements in the zirconium-scandium co-doped precursor transition layer increases from the inside to the outside. According to the application, zirconium and scandium are selectively and gradiently doped in the inside and the shell of the positive electrode precursor, and multiple components are synergistically used, so that the generation of micro-cracks can be inhibited from the inside, the diffusion resistance of lithium ions is reduced, surface lattice oxygen can be stabilized during high-voltage charging, oxygen release is inhibited, and the structural stability of the prepared positive electrode material in the cycle process is improved.

The invention relates to the technical field of lithium batteries, in particular to a bipolar current collector, a preparation method thereof and a lithium metal battery. The bipolar current collector comprises a metal foil, an alpha zirconium phosphate doped polyaniline coating and a graphene coating; the metal foil comprises an anode metal foil layer and a cathode metal foil layer; the positive electrode metal foil layer is stainless steel foil, and the surface of the positive electrode metal foil layer is coated with the graphene coating; the negative electrode metal foil layer is a copper layer, and the surface of the negative electrode metal foil layer is coated with the alpha zirconium phosphate doped polyaniline coating; the preparation method of the bipolar current collector comprises the following steps: performing magnetron sputtering on the surface of stainless steel foil to form a copper layer; metal foil is obtained; coating the surface of the copper layer with an alpha zirconium phosphate doped polyaniline solution, drying and curing to form an alpha zirconium phosphate doped polyaniline coating; then, the surface of the stainless steel foil is coated with graphene slurry, post-treatment is conducted, and a graphene coating is formed; and obtaining the bipolar current collector. And preparing the lithium metal battery by using the bipolar current collector.

The application discloses a kind of transparent conductive heating material and preparation method thereof, belong to conductive heating material technical field, can solve the problems of high surface resistance, low light transmittance, poor temperature uniformity and short service life of existing conductive heating material.The preparation method comprises the following steps: S1, pretreatment is carried out to the substrate to obtain the treated substrate;S2, depositing buffer target material on the treated substrate to form a stress buffer layer;S3, depositing conductive heating target material on the stress buffer layer to form a conductive heating layer; the conductive heating target material is zirconium-doped indium oxide;S4, preparing an electrode layer on the conductive heating layer.The application is used for the preparation of transparent semiconductor heating material.

The invention discloses a low-platinum high-stability membrane electrode and a preparation method thereof, and belongs to the technical field of fuel cells. The membrane electrode comprises a proton exchange membrane, a catalyst layer and a gas diffusion layer, wherein the catalyst layer is composed of a Ti3C2TXMXene matrix, platinum nanoparticles and zirconium-doped cerium oxide nanoparticles. The surface of the MXene is subjected to plasma treatment to form a nitrogen-oxygen co-doped layer, and the nitrogen-oxygen co-doped layer is vertically aligned to form a porous network structure; the platinum nanoparticles are uniformly dispersed on the surface of the MXene; ce0. 8Zr0. 2O2 nano-particles are embedded between the MXene layers, so that high oxygen vacancy concentration is achieved. Through the synergistic effect of the ternary material, high electrochemical activity is kept while low platinum loading capacity is realized; the high conductivity of MXene and the nitrogen-oxygen co-doped layer effectively anchor platinum nanoparticles, so that the stability is remarkably improved; the high oxygen vacancy concentration of Ce0. 8Zr0. 2O2 can efficiently capture free radicals, so that the proton exchange membrane is protected.

This invention provides a modified cathode precursor, its preparation method, and its application. The preparation method includes the following steps: (1) mixing a nickel-cobalt-manganese ternary salt solution with a zirconium salt to obtain a zirconium-doped ternary salt solution; (2) injecting the zirconium-doped ternary salt solution, a precipitant, and a complexing agent into the base solution in a co-precipitation reaction; (3) keeping the injection rates of the precipitant and the complexing agent constant, reducing the injection rate of the zirconium-doped ternary salt solution, and injecting it into an aluminum-containing salt solution in a co-precipitation reaction to obtain the modified cathode precursor. In the early stage of this invention, the doping element and the ternary solution are mixed and fed together. The proportion of the ternary solution and the concentration of the doping element in the solution are adjusted in the early stage. After the coprecipitation begins, the concentration or flow rate of the doping element does not need to be adjusted. After reaching a certain particle size, the coating element and the ternary material are fed together. The feed flow rate is adjusted according to the amount of coating element to obtain a uniformly doped and coated ternary precursor with both anion and cation doping.

The invention belongs to the technical field of surface modification of optical thin film materials, and particularly relates to a silicon dioxide-based super-hydrophilic thin film and a preparation method thereof.The silicon dioxide-based super-hydrophilic thin film is formed by doping zirconium in a silicon dioxide thin film, the percentage content of O atoms in the thin film is 60%-65%, the balance is Si and Zr, the total percentage content is 100%, and the atomic ratio of Si to Zr is (10-50): 1; in an oxygen-containing atmosphere, a magnetron sputtering technology is adopted, a silicon target and a zirconium target are sputtered on a substrate at the same time, zirconium is doped into silicon dioxide, the zirconium-doped silicon dioxide-based super-hydrophilic film is obtained, subsequent hydroxylation treatment is not needed, super-hydrophilicity can be achieved in a natural environment, and the method is simple in process and easy to implement.

The invention discloses a halide solid electrolyte with electrochemical activity and a preparation method and application thereof, the solid electrolyte is a zirconium-doped ferric lithium chloride solid electrolyte, the chemical general formula of the solid electrolyte is LiFe1-4x / 3MxCl4, M is a metal element with the valence state higher than + 3, 0 lt; xlt; 1. According to the halide solid-state electrolyte with the electrochemical activity, the ionic conductivity order of magnitude is improved, the room-temperature ionic conductivity is improved to 10 <-3 > S / cm from 10 <-6 > S / cm by three orders of magnitude, so that the material is changed from'unavailability 'to'high performance', and the application requirement of an all-solid-state battery is met.

A material comprising zirconium-doped lithium titanate, wherein the zirconium-doped lithium titanate contains zirconium in a concentration of 0.1-5 mol percent based on the sum of titanium and zirconium.

A memory includes a substrate and a capacitor structure over the substrate. The capacitor structure includes a bottom electrode, a dielectric structure over the bottom electrode defending a top electrode over the dielectric structure. The dielectric structure comprises a bottom barrier layer made of an alumina process, a top barrier layer made of an alumina process and located above the bottom barrier layer, and a stack of a plurality of dielectric layers made of zirconium-doped hafnium oxide and at least one insertion layer made of alumina, the stack is located between the bottom barrier layer and the top barrier layer, wherein at least one interposer layer is located between two adjacent dielectric layers. The memory can have high capacitance and low leakage current.

The invention relates to a zirconium germanate-based orange pigment as well as a preparation method and application thereof. The pigment matrix is zirconium germanate, a doping element contains Tb, the chemical composition of the pigment is Zr < 1-x > Tb < x > GeO4, and x is equal to 0.05-0.3. The preparation method comprises a sol-gel method, a coprecipitation method or a solid-phase synthesis method. The pigment can be used as an orange pigment to be applied to the fields of plastics, coatings, enamel, ceramics or glass. The zirconium germanate-based orange pigment provided by the invention is non-toxic, good in stability and bright in color.

The invention relates to the technical field of special tempered glass used in the fields of aerospace, vehicles, ships and the like, and particularly discloses damp-heat aging resistant perovskite PSC charging glass and a preparation method thereof. The charging glass sequentially comprises a glass substrate, a transparent electrode layer, a hole transport layer, a zirconium-doped perovskite active layer, an electron transport layer, a metal electrode layer and a composite protective layer from bottom to top, the zirconium-doped perovskite active layer contains a perovskite material of which the chemical formula is CsPb < 1-x > Zr < x > I < 2 > Br; the composite protection layer is a composite layer of graphene and PMMA. The preparation method comprises the steps of substrate treatment, sequential preparation of the functional layers and the like, wherein the perovskite layer adopts a gradient annealing process. Perovskite phase transformation is inhibited through zirconium doping, the composite protection layer blocks water vapor erosion, the stability of the device is synergistically improved, the efficiency retention rate still reaches 90% or above after the device is aged for 1000 h under the relative humidity of 85 DEG C / 85%, and meanwhile, the initial photoelectric conversion efficiency of 15.8%-16.5% is kept.

This invention discloses a high-nickel cobalt-free cathode material and its preparation method. The preparation method includes the following steps: preparing zirconium-doped high-nickel cobalt-free nickel-manganese hydroxide; adding zirconium-doped high-nickel cobalt-free nickel-manganese hydroxide, lithium hydroxide, magnesium titanate, and zirconium aluminate to water, mixing evenly, and drying to obtain a mixture; placing the mixture in a pure oxygen atmosphere and holding it at 300℃-800℃ for 6-12 hours to obtain high-nickel cobalt-free nickel-manganese lithium oxide; mixing high-nickel cobalt-free nickel-manganese lithium oxide, borosilicate, and tungsten oxide evenly, drying, and sintering to obtain the target product. In this invention, the addition of magnesium titanate and zirconium aluminate during the preparation process makes the material's crystal structure more complete; the synergistic coating of borosilicate and tungsten oxide effectively improves the specific capacity of the material, better stabilizes the crystal structure, and significantly enhances the overall performance of the material.

This invention provides a zirconium-doped sodium metaborate-coated cathode material and its preparation method. The preparation method includes the following steps: co-precipitation to prepare a zirconium-doped nickel-cobalt-manganese hydroxide precursor; mixing a lithium source with the zirconium-doped nickel-cobalt-manganese hydroxide precursor and sintering in an oxygen-containing atmosphere to obtain a zirconium-doped nickel-cobalt-manganese cathode material; dispersing the zirconium-doped nickel-cobalt-manganese cathode material in a sodium metaborate precursor solution, evaporating the solvent to allow the sodium metaborate precursor to adhere to the surface of the zirconium-doped nickel-cobalt-manganese cathode material; and heat-treating in an oxygen-containing atmosphere to obtain the zirconium-doped sodium metaborate-coated cathode material. This invention improves the electrochemical performance of the zirconium-doped sodium metaborate-coated cathode material through Zr bulk doping and sodium metaborate surface coating, and the preparation method is simple and easy to scale up for industrial production.

This invention discloses a high-safety ternary lithium-ion battery cell and its preparation method, comprising a positive electrode, a negative electrode, a separator, an electrolyte, and a casing; the positive electrode comprises an aluminum foil and a positive electrode material layer coated on the aluminum foil, wherein the active material of the positive electrode material layer is a ternary material; the ternary material comprises the following materials by mass percentage: 85-95% high-voltage single-crystal LiNi 0.6 Co 0.2 Mn 0.2 O2 co-doped polycrystalline LiNi with 5-15% zirconium and titanium gradient 0.6 Co 0.2 Mn 0.2 O2; The negative electrode includes a copper foil and a negative electrode material layer coated on the copper foil. The active material of the negative electrode material layer is artificial graphite with pure needle coke as a precursor. Through the design of zirconium and titanium gradient doping, functional partitioning is achieved. The internal zirconium doping acts like a pillar to stabilize the lattice, effectively suppressing the generation of harmful phase transitions and particle microcracks under high voltage.

The application discloses a low-platinum high-stability membrane electrode and a preparation method thereof, and belongs to the technical field of fuel cells. X The MXene substrate, platinum nanoparticles and zirconium-doped cerium oxide nanoparticles. The MXene surface is subjected to plasma treatment to form a nitrogen-oxygen co-doped layer, and is vertically arranged to form a porous network structure; the platinum nanoparticles are uniformly dispersed on the MXene surface; the Ce 0.8 Zr 0.2 O2 nanoparticles are embedded between the MXene layers and have a high oxygen vacancy concentration. Through the synergistic effect of the ternary material, high electrochemical activity is maintained while the platinum load is low; the high conductivity of the MXene and the nitrogen-oxygen co-doped layer effectively anchor the platinum nanoparticles, and the stability is significantly improved; the high oxygen vacancy concentration of the Ce 0.8 Zr 0.2 O2 can efficiently capture free radicals, thereby protecting the proton exchange membrane.

The invention belongs to the field of thermal barrier coating ceramic powder preparation, and particularly relates to zirconium oxide doped rare earth tantalate niobate high-toughness ceramic powder and a preparation method thereof. According to the zirconium oxide doped rare earth tantalate niobate high-toughness ceramic powder, the molecular formula of the ceramic powder is (RETa1 / 2Nb1 / 2O4) x (ZrO2) 1-x, and x is larger than 0.5 and smaller than 1; rE is one or a mixture of more of Y, Yb, Gd, La, Nd, Lu, Sm, Eu, Dy and Er. The doping of rare earth elements is beneficial to formation of lattice distortion and the like to improve the thermodynamic property of the powder material, and further the doping of zirconium oxide is beneficial to improvement of the fracture toughness of the powder material; according to the technical scheme, high-toughness zirconium oxide doped rare earth tantalate niobate thermal barrier coating ceramic material powder is used for the first time, a wider space is provided for regulation and control of the structure and performance of a thermal barrier coating material through the multi-component solid solution effect of tantalate niobate, and the microstructure and macroscopic performance of the material are remarkably changed by introducing external atoms or defects in doping.

The invention provides a zirconium-containing positive electrode material precursor and a preparation method and application thereof. The preparation method comprises the following steps: providing a ternary metal salt solution with a pH value of 2-2.5; mixing the ternary metal salt solution with solid zirconium salt to obtain a zirconium-doped ternary metal salt solution; and adding the zirconium-doped ternary metal salt solution, a precipitator and a complexing agent into the base solution in a parallel flow manner, and carrying out a co-precipitation reaction to obtain the zirconium-containing positive electrode material precursor. According to the method, the pH value of the ternary metal salt solution is regulated to 2-2.5 in advance, and then the ternary metal salt solution is mixed with the solid zirconium salt, so that hydrolysis of zirconium ions is fundamentally inhibited, and generation of independent zirconium precipitates is effectively prevented. The method not only avoids the loss of the zirconium element, but also ensures that the zirconium exists in the homogeneous solution in a free state, and lays a foundation for uniform coprecipitation. The prepared precursor is a single hydroxide phase, and the zirconium element is continuously and uniformly distributed, so that the final positive electrode material has more excellent electrochemical performance.

Provided is a titanium-zirconium co-doped carbon-coated lithium iron phosphate material and a production method and use thereof. The material has a chemical formula of Li1-yZryFe1-xTixPO4 / C, wherein titanium is doped to Fe site, zirconium is doped to Li site, 0.001≤x≤0.05, and 0.001≤y≤0.02. The production method comprises mixing iron phosphate, lithium carbonate, a carbon source, a titanium source and a zirconium source in a liquid medium, ball-milling and sand-milling the mixture to a certain slurry particle size, spray-drying the slurry for granulation, and then sintering the dried spray material in an atmosphere furnace. In the present disclosure, by doping titanium and zirconium elements into carbon-coated lithium iron phosphate, the ion and electron transport capacity of lithium iron phosphate is effectively enhanced and the compaction density of the material is improved. The material is very suitable to be used as a positive electrode material for a lithium-ion power battery.

The embodiment of the present application provides a ferroelectric thin film capacitor and a preparation method of the ferroelectric thin film capacitor, the structure of the ferroelectric storage capacitor provided by the present application comprises: a first metal electrode; a second metal electrode; a ferroelectric layer, which is arranged between the first metal electrode and the second metal electrode; wherein the material of the ferroelectric layer is a zirconium-doped hafnium dioxide material, and the zirconium-doped hafnium dioxide material is doped with nitrogen elements, the ferroelectric thin film capacitor can passivate oxygen vacancies generated under the influence of high temperature in the process of thin film deposition by in-situ injection of nitrogen elements in the zirconium-doped hafnium dioxide ferroelectric layer; in addition, in the process of using the ferroelectric thin film capacitor, the electric defects can be reduced by filling oxygen vacancies in the ferroelectric layer, so that the ferroelectric thin film imprinting effect and the breakdown phenomenon caused by the accumulation of oxygen vacancies are improved, and the performance and service life of the ferroelectric thin film capacitor are improved.

This invention provides a nickel-rich cathode precursor, its preparation method, and its application. The nickel-rich cathode precursor includes a core and a coating layer covering the surface of the core; the core includes a cathode precursor matrix material and boron oxide and zirconium doped into the cathode precursor matrix material; the zirconium doping amount gradually increases along the direction from the center of the core to the surface of the cathode precursor matrix material; the coating element in the coating layer includes zirconium. This invention, by directly doping boron oxide into the precursor, while simultaneously coordinating with gradient doping and coating of zirconium, significantly reduces the uneven surface stress distribution of the subsequently prepared cathode material, reduces the generation of microcracks, stabilizes the material structure, and improves safety and electrochemical performance.

The invention relates to the technical field of processing of organic high-molecular compounds using inorganic substances as ingredients. The invention discloses an oil-proof heat-resistant sealing material as well as a preparation method and application thereof. The material comprises methyl vinyl silicone rubber, hydroxyl silicone oil, fumed silica, a vulcanizing agent, an accelerant, zirconium-doped polymethylhydrosiloxane, cobaltosic oxide or cerium-doped cobaltosic oxide. The zirconium-doped polymethylhydrosiloxane is added into the formula of the sealing material, and zirconium is doped in a molecular chain of siloxane, so that the high-temperature resistance of the silicone rubber is improved; and the addition of cobaltosic oxide or cerium-doped cobaltosic oxide can inhibit the occurrence of oxidation crosslinking and main chain cyclization degradation of silicone rubber molecule side groups, thereby further improving the heat resistance of the silicone rubber. In addition, due to the addition of cobaltosic oxide or cerium-doped cobaltosic oxide, the oil resistance of the silicone rubber is also improved. Meanwhile, the addition of a proper mass of cobaltosic oxide or cerium-doped cobaltosic oxide does not affect the mechanical properties of the silicone rubber.

This invention discloses a carbon-coated zirconium-doped lithium manganese iron phosphate composite material, its preparation method, and its application, belonging to the field of functional materials technology. The chemical formula of the material is: Li 1‑ 2z Mn x Fe y Zr z PO4 / C; wherein, 0.5≤x≤0.8, 0.15≤y≤0.45, 0.005≤z≤0.05, and satisfying x+y+z=1; its preparation method includes: weighing lithium source, manganese source, iron source, phosphorus source, zirconium source and carbon source according to stoichiometric ratio, mixing them, adding solvent, and dispersing at high speed and grinding to obtain a uniform precursor slurry; after drying, pre-calcining at 300-500℃ for 2-4h under an inert atmosphere, then calcining at 650-750℃ for 6-14h, cooling, crushing and sieving to obtain carbon-coated zirconium-doped manganese iron phosphate; this material, by introducing Zr doping, utilizes its induced charge compensation mechanism and strong covalent bond pillar effect to effectively broaden the one-dimensional diffusion channel of lithium ions, significantly suppressing lattice distortion and manganese ion dissolution during charging and discharging, and obtaining high-rate kinetics and excellent long-cycle stability when used as a positive electrode for lithium-ion batteries.

The invention relates to a preparation method of a zirconium-doped ternary precursor, and the preparation method comprises the following steps: a nucleation stage: adding a ternary metal salt solution, a first zirconium salt solution, a precipitator solution and a complexing agent solution into a base solution in a parallel flow manner, and carrying out a first reaction to obtain a first reaction solution; in the growth stage, a ternary metal salt solution, a second zirconium salt solution, a precipitator solution and a complexing agent solution are added into the first reaction solution in a parallel flow mode, a second reaction solution is obtained through a second reaction, and then the zirconium-doped ternary precursor is obtained through solid-liquid separation; wherein the temperature of the second zirconium salt solution is less than or equal to that of the first zirconium salt solution; the pH value of the second zirconium salt solution is greater than or equal to that of the first zirconium salt solution. According to the preparation method disclosed by the invention, the nuclear explosion phenomenon is avoided, the uniform distribution of the zirconium element is realized, the electrical property of the battery material prepared by utilizing the zirconium element is improved, the first charge-discharge specific capacity is preferably up to 233 mAh / g or above, and the capacity retention ratio after 100 cycles is preferably up to 95% or above.

This invention discloses a method for micro-oxidation and coating treatment of tungsten copper powder surface to inhibit polyoxymethylene (POM) decomposition, relating to the fields of powder metallurgy and metal powder surface modification technology. This method involves particle size classification, followed by pulsed weak oxidation and oxygen plasma doping treatments to passivate the catalytic activity of conventional tungsten copper powder. Nano-sized tungsten copper powder is then organically coated to form a formaldehyde-capturing layer. Finally, the two modified powders are compounded with a POM matrix, synergistically inhibiting POM decomposition through multiple mechanisms to obtain a stable feedstock suitable for injection molding. This invention reduces the catalytic activity of conventional tungsten copper powder through surface passivation and zirconium doping, and endows the nano-powder with formaldehyde-capturing capabilities through organic coating. The two work synergistically in the feedstock process, blocking the catalytic reaction pathway between the metal and the POM matrix while eliminating decomposition products, thus improving the processing stability of the feedstock and the product lifespan. This provides a new path for the development of high-performance tungsten copper feedstocks.

The present invention relates to a positive electrode material powder containing a lithium composite transition metal oxide containing nickel, cobalt, manganese, and zirconium, in which a single degree of granulation as defined by mathematical formula 1 is 2.5 to 4.5; the invention also relates to a preparation method of the positive electrode material powder, which comprises four sintering processes and a zirconium doping process, and the D50 of the transition metal-containing precursor is controlled to 95% or less of the D50 of the positive electrode material powder.

The invention discloses a high-safety doped ternary system lithium ion battery cell and a preparation method thereof. The high-safety doped ternary system lithium ion battery cell comprises a positive electrode, a negative electrode, a diaphragm, electrolyte and a shell, the positive electrode comprises an aluminum foil and a positive electrode material layer coated on the aluminum foil, and an active material of the positive electrode material layer is a mixed ternary material; the doped ternary material is prepared from the following materials in percentage by mass: 85 to 95 percent of high-voltage single crystal type LiNi < 0.6 > Co < 0.2 > Mn < 0.2 > O < 2 > and 5 to 15 percent of zirconium and titanium gradient co-doped polycrystalline type LiNi < 0.6 > Co < 0.2 > Mn < 0.2 > O < 2 >, the negative electrode comprises a copper foil and a negative electrode material layer coated on the copper foil, and an active material of the negative electrode material layer is artificial graphite taking pure needle coke as a precursor; through the design of gradient doping of zirconium and titanium, functional partition is realized, internal zirconium doping stabilizes crystal lattices like a pillar, and harmful phase change and particle microcracks under high voltage are effectively inhibited.