51 results about "Zirconium doping" patented technology

According to one aspect of the present invention, a method for preparing a zirconium-doped ternary positive electrode material is provided, comprising the following steps: S1. According to the stoichiometric ratio of each element in the zirconium-doped ternary positive electrode material, a first precursor is prepared by a first coprecipitation reaction using a soluble nickel salt, a soluble cobalt salt and a soluble salt containing the M element, wherein the first precursor contains nickel element, cobalt element and M element, wherein the M element includes at least one of manganese element and aluminum element; S2. A zirconium-containing compound is deposited on the surface of the first precursor by a second coprecipitation reaction to obtain a second precursor; S3. According to the stoichiometric ratio of each element in the zirconium-doped ternary positive electrode material, the second precursor is mixed with a lithium source to obtain a third precursor, and the third precursor is calcined by a high-temperature solid phase method to obtain the zirconium-doped ternary positive electrode material.

The invention provides a preparation method of a zirconium oxide-doped bismuth telluride-based thermoelectric material, a nano zirconium oxide material is introduced to prepare the composite bismuth telluride-based thermoelectric material, and due to the outstanding electrical properties and mechanical properties of nano zirconium oxide, the thermoelectric properties and mechanical properties of a composite product are improved by ball-milling mixing and hot extrusion preparation processes. Compared with a commercial bismuth telluride material, the bismuth telluride material is improved. By doping the nano zirconia material, more stress can be effectively borne, the matrix load is reduced, the mechanical property of the material is improved, the thermoelectric property of the material is not reduced, and the application prospect of the bismuth telluride thermoelectric material is effectively widened.

Provided is a positive electrode active material including core particles including zirconium-doped layered lithium nickel-manganese-aluminum-based composite oxide, wherein the core particle is a secondary particle formed by agglomerating a plurality of primary particles, an average particle diameter (D50) of the secondary particles is about 10 μm to about 25 μm, and in the zirconium-doped layered lithium nickel-manganese-aluminum-based composite oxide, a zirconium content is about 0.2 mol % to about 0.8 mol % based on 100 mol % of a total metal excluding lithium. The positive electrode active material according to some embodiments may maximize capacity, while minimizing a production cost, to ensure long cycle-life characteristics and improve high-voltage characteristics and high-temperature characteristics. If the positive electrode active material is applied to a rechargeable lithium battery, high initial charge / discharge capacity and efficiency may be achieved under high-voltage operating conditions, and long cycle-life characteristics may be realized under high-voltage and high-temperature conditions.

The invention discloses a superhard film layer and a preparation method thereof. The superhard film layer comprises a base layer; the wear-resistant layer is arranged at the top of the base layer and is used for enhancing scratch resistance and fatigue resistance; the silicon oxynitride layer is arranged at the top of the wear-resistant layer and is used for adjusting the hardness and structural compatibility between different film layers; the titanium and zirconium doped silicon nitride layer is arranged at the top of the silicon oxynitride layer; the hydrogen-containing gradient silicon oxynitride layer is arranged on the top of the titanium-zirconium-doped silicon nitride layer, titanium, zirconium and hydrogen elements are introduced into the film layer, and the gradient film layer design is adopted, so that the hardness, the wear resistance and the corrosion resistance of the film layer are remarkably improved. A hardness test shows that the hardness of the prepared super-hard film layer is remarkably improved compared with that of a traditional film layer, and the prepared super-hard film layer can effectively resist scraping and abrasion in daily use and improve the service life and imaging stability of a lens in practical application such as a camera lens.

The invention relates to a vanadium oxide coated and zirconium-doped modified precursor and a preparation method and application thereof.According to the preparation method, zirconium doping and an ammonium vanadate solution are specifically used, cation mixing is inhibited through the stabilization effect of zirconium, lattice distortion is reduced, the stable unit cell volume can be maintained through zirconium doping, and the stability of the unit cell volume is improved; and the problem of unit cell expansion caused by conventional doping elements is avoided, so that the high-rate performance of the material is reserved. The semiconductor-metal phase change characteristic of vanadium oxide is utilized, the critical temperature can be adjusted to be close to the room temperature, and the high-temperature stability and electronic conductivity of the material are improved; through the combination of the two, the high-rate discharge performance of the ternary positive electrode material and the structural stability of the material can be greatly improved.

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 discloses an underground heater insulating material capable of improving the insulating property through zirconium doping and a preparation method thereof. The insulating material is an insulating ceramic material prepared from a mixed material containing magnesium oxide, a doping material containing a zirconium element and a modifying reagent through ball milling, drying granulation, aging forming and plastic removal sintering. As the doped material containing the zirconium element and magnesium oxide can form a solid solution, crystal lattices of magnesium oxide crystals are activated, the compact degree and strength of the material are improved, and the insulating property is improved; the modification reagent reduces the vacancy defect of MgO crystal grains, moisture absorption is not easy to form an MgO-OH structure, and the volume resistivity is improved; compared with a high-purity magnesium oxide ceramic material, the prepared insulating ceramic material has good high-temperature insulating property and can be used as an insulating material for an underground high-power heater.

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 invention provides a zirconium-doped high-nickel ternary precursor material and a preparation method and application thereof.The preparation method comprises the following steps that a zirconium-doped mixed metal salt solution, a mixed coprecipitator solution and a complexing agent solution are introduced into a first base solution, a first coprecipitation reaction is conducted, and a seed crystal solution is obtained; removing a solvent in the seed crystal solution to obtain a seed crystal; the mixed coprecipitator solution comprises metaborate and hydroxide; and mixing the seed crystal with a second base solution, introducing the zirconium-doped mixed metal salt solution, the metaborate solution and the complexing agent solution into the second base solution containing the seed crystal, and carrying out a second coprecipitation reaction to obtain the zirconium-doped high-nickel ternary precursor material. According to the invention, the metaborate is adopted for co-precipitation, and meanwhile, the pressure resistance and stability of the material are improved, the sphericity and particle size distribution of the material are improved, and the cycle performance of the lithium ion battery is improved by constructing the seed crystal and controlling the subsequent slow release of OH <->.

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 invention discloses a zirconium-doped nano zero-valent metal composite material as well as a preparation method and application thereof. The preparation method comprises the following step: in an aqueous solution, reacting transition metal salt with a zirconium source under the action of a reducing agent to prepare the zirconium-doped nano zero-valent metal composite material. The zirconium-doped nano zero-valent metal composite material is prepared through a liquid-phase in-situ reduction coprecipitation method, and the composite material has extremely high stability while showing excellent oxidation-reduction activity. Meanwhile, the composite material can be used as a Fenton-like catalyst to efficiently treat wastewater polluted by the organic chelating agent.

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 present invention relates to a vanadium oxide-coated and zirconium-doped modified precursor, as well as its preparation method and application. The preparation method specifically utilizes zirconium doping and an ammonium vanadate solution. The stabilizing effect of zirconium suppresses cation mixing and reduces lattice distortion. Zirconium doping maintains unit cell volume stability, avoiding the unit cell expansion caused by conventional doping elements, thereby preserving the material's high-rate performance. By utilizing the semiconductor-metal phase transition properties of vanadium oxide, the critical temperature of which can be adjusted to near room temperature, improving the material's high-temperature stability and electronic conductivity. The combination of these two properties can significantly improve the high-rate discharge performance of ternary cathode materials, as well as the material's structural stability.

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.

The invention relates to a high-temperature-resistant inductive angle sensor, and belongs to the technical field of angle sensors. The sensor comprises a gradient composite ceramic substrate Al2O3-ZrO2-Al2O3, gradient matching of thermal expansion coefficients is realized by doping yttrium oxide into zirconium oxide in a middle layer, and the risk of thermal stress cracking is reduced; the titanium nitride nanocrystalline layer and the micro-arc oxidation porous layer are sequentially formed on the surface of the substrate, so that the surface binding force is improved; the TiN or TiN / Ag composite film coil is prepared by adopting an atomic layer deposition process, so that the temperature resistance is improved; the coil and the circuit are connected through an electron beam welding and transient liquid phase bonding composite technology; and the insulating packaging layer is formed by compounding boron nitride nanosheets and high-temperature-resistant resin, so that the heat conductivity and the breakdown field strength are improved. Through gradient substrate design, film coil integration and composite process optimization, the problems of thermal stress failure, coil oxidation and insulation aging of a traditional inductive sensor at high temperature are solved, and the sensor is suitable for angle measurement in an extreme environment.

The invention discloses a multi-component doped ultralow-loss optical fiber and a preparation method thereof. The optical fiber comprises a fiber core layer, a secondary core layer, a gradient control layer, a nonlinear functional layer, an absorption layer, an isolation layer, a thermal stability layer, a supporting layer, a transition protection layer and an outer cladding which are arranged from inside to outside. According to the optical fiber, the 1550nm wave band attenuation is reduced to 0.145 dB / km, and ultralow loss is realized; the diameter of a mode field reaches 11-16 [mu] m, and mode interference is effectively reduced; the optical fiber supports communication of S + C + L wave bands of 1300-1625 nm, when 100 circles of looping with the radius of 60 mm are carried out, the maximum additional attenuation at the position of 1550 nm does not exceed 0.01 dB, and the optical fiber is suitable for long-distance communication; the environment adaptability of the optical fiber is high, the stability of the optical fiber in high-temperature, high-humidity and strong-mechanical-stress environments is enhanced by arranging the thermal stability layer and the supporting layer and combining the zirconium doping design of the outer cladding, and the optical fiber is particularly suitable for submarine optical cables and high-reliability backbone networks.

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.