50 results about "Mn element" patented technology

The invention belongs to the technical field of low-carbon dehydrogenation aids, and particularly relates to a heat balance aid as well as a preparation method and application thereof. The heat balance auxiliary agent comprises Al, Ca, Si, Cu and Mn elements existing in an oxide form; wherein the Al2O3, the CaO and the SiO2 jointly form a skeleton structure of the auxiliary agent, and the CuO and the MnO2 are used as active components and are attached to the skeleton structure; the molar ratio of metal elements in the heat balance auxiliary agent is as follows: Al: Ca: Si: Cu: Mn = (49-78.9): (15-25): (1-10): (5-15): (0.1-1). The heat balance additive prepared by the invention shows excellent anti-sintering capability, long service life and stable heat supply performance under harsh reaction conditions such as propane dehydrogenation, and can effectively improve the selectivity of target olefin and reduce the generation of byproducts such as methane.

The invention relates to the technical field of high-performance aluminum alloy materials, in particular to a high-strength heat-resistant A < l >-Cu alloy based on an interface stabilization strategy and a preparation method thereof.The high-strength heat-resistant A < l >-Cu alloy comprises, by mass, 5.03% of Cu, 0.29% of Sc, 0.22% of Zr, 0.31% of Mn, smaller than or equal to 0.05% of single impurity elements, smaller than or equal to 0.15% of total impurity elements and the balance A < l >; after 1000 hours of thermal exposure at the temperature of 300 DEG C, the tensile strength is still larger than or equal to 300 MPa and is far superior to that of a traditional Al-Cu alloy, back-to-back synergistic segregation of Sc and Mn elements is achieved for the first time, theta '-phase coherent and semi-coherent interfaces are synchronously stabilized, the coarsening path is comprehensively blocked, the utilization rate of the Sc element is increased through the pre-aging technology, premature consumption of the Sc element is avoided, and the actual use cost of the expensive Sc element is reduced.

This invention discloses a high-elongation aluminum alloy for lightweight automotive components and its preparation method, relating to the field of aluminum alloy material technology. It features a hierarchical porous structure with surface micron-sized closed pores and a core nano-sized through-pore. The Ti and Mn elements synergistically form an Al-Ti-Mn martensitic phase transformation core region with Al, and the Cr element precisely controls the martensitic phase transformation initiation temperature to room temperature, ensuring stable triggering of the austenite-to-martensitic phase transformation and energy absorption during room-temperature collisions. This invention achieves initial impact buffering and gradual collapse energy absorption through a hierarchical porous structure with surface micron-sized closed pores and a core nano-sized through-pore. This dual energy absorption mechanism significantly improves the material's strength-ductility product, far exceeding that of traditional aluminum alloys.

This invention relates to the field of steel tensile strength calculation technology, and in particular to a method for calculating the tensile strength of 42CrMo steel used in engineering machinery. The method involves establishing a dimensionless model through data fitting between tensile strength and quenching temperature X1, tempering temperature X2, and the mass percentage of Mn element X3: Y2 = 5404 - 2.12X1 - 4.952X2 + 540X3. This invention can accurately reflect the quantitative relationship between the heat treatment process parameters of 42CrMo steel, especially the tempering temperature, and tensile strength. It can predict tensile strength, enabling engineers to accurately predict the final properties of the material when formulating heat treatment processes, and to actively and accurately control the tensile strength of the material by adjusting process parameters.

The invention relates to the technical field of metal materials, and particularly discloses light-weight high-toughness medium manganese steel and a preparation method and application thereof. The method comprises the following steps: firstly, pre-oxidizing a hot rolled plate in a specific low oxygen partial pressure atmosphere, and forming a compact Al2O3-MnO composite oxide layer which is well combined with a matrix on the surface in situ; and then, in multi-pass warm rolling, synchronous plastic deformation of the oxide layer and the base body can be achieved, and interface stripping is avoided. And finally, in the circulating annealing process, a surface oxide layer serves as a diffusion barrier to inhibit Mn element leakage and enrich the Mn element towards the core, so that the heterogeneous structure with the continuous gradient characteristic is successfully constructed, specifically, the surface layer is superfine martensite, the transition area is an austenite-ferrite double-phase structure, and the core is Mn-rich coarse grain austenite. The gradient tissue enables the material to have high strength, high wear resistance and high plasticity at the same time, and is suitable for medical instruments with comprehensive requirements for mechanical properties, light weight and biocompatibility, such as knee joint tractor fixing braces.

The application relates to a feed for metal injection molding, a preparation method of the feed and a metal product, wherein the preparation method of the feed comprises the following steps: S1, obtaining the following components according to weight parts: 40-50 parts of Fe elements, 2-8 parts of Ni elements, 20-25 parts of Cr elements, 20-25 parts of Co elements, 2-8 parts of Mo elements, 2-8 parts of Cu elements, 0.1-3 parts of Si elements, 1-3 parts of Mn elements, mixing and then heating to melt the material, and then adopting a high-pressure water-gas combined atomization method to obtain mixed powder; S2, obtaining a forming agent; S3, preheating the mixed powder obtained in S1 under vacuum conditions, then adding the forming agent into the mixed powder for mixing, and then performing plasticizing extrusion granulation to prepare the feed. The feed can meet the size precision requirements of MIM injection, green compact degreasing sintering and related post-process machining, the existing MIM materials on the market cannot simultaneously meet the problem of high polishable hardness, and the obtained metal product has the comprehensive advantages of appearance and hardness.

The present application belongs to the technical field of vacuum metallurgy, and discloses a method for precisely controlling manganese element in cobalt-based high-temperature alloy. The method calculates the designed addition amount of manganese element through an empirical formula, and controls the production process according to a specific melting process. The preparation method comprises the following steps: according to the target value of Mn element, the addition amount of Mn element is designed according to an empirical formula; the vacuum induction melting process of the alloy is designed according to the temperature and vacuum degree designed according to the empirical formula; and the production of the cobalt-based high-temperature alloy containing manganese element is carried out by using the designed melting process. The present application can realize the precise control of the manganese element in the cobalt-based high-temperature alloy, and the control error range is within ±10%, which greatly improves the quality stability of the cobalt-based high-temperature alloy master alloy.

The invention belongs to the technical field of ceramic materials, and particularly relates to a wide-temperature-range MAX-phase ceramic material and a preparation method thereof. The chemical general formula of the ceramic material is (Ti1-x-yMnxMoy) 3AlC2, the value range of x is greater than or equal to 0.15 and less than or equal to 0.25, the value range of y is greater than or equal to 0.05 and less than or equal to 0.15, and the sum of x and y is 0.3. The preparation method comprises the following steps: weighing titanium powder, manganese powder, molybdenum powder, aluminum powder and graphite powder according to a stoichiometric ratio, and additionally adding 1-3at.% of excessive aluminum powder; and carrying out ball-milling mixing, drying and sieving, and sintering by adopting a two-stage hot pressing sintering process to prepare the MAX phase ceramic material. Through Mo and Mn element solution strengthening, excessive Al adding and two-stage gradient heating sintering processes, the structural stability, the mechanical property and the tribological property of the material in the wide temperature range from the room temperature to 1600 DEG C are remarkably improved.

The invention belongs to the technical field of composite aluminum alloy, and discloses an aluminum alloy composite board and a corrosion-resistant aluminum alloy composite board. The aluminum alloy composite board is of a double-layer structure which comprises a core layer and a corrosion-resistant layer; the core layer comprises a Si element, a Fe element, a Cu element, a Mn element and a Mg element, and the anti-corrosion layer comprises a Zn element, the Si element and the Fe element; the corrosion-resistant aluminum alloy composite board is obtained by carrying out zinc impregnation treatment on the aluminum alloy composite board. And after zinc impregnation treatment, the difference value between the potential of a Zn-element-free diffusion area of the anti-corrosion layer and the potential of the innermost layer of the core layer is smaller than or equal to 150 mV. The corrosion-resistant aluminum alloy composite board shows excellent layered corrosion in a corrosion environment.

The invention provides a 7xxx series aluminum alloy plate strip for anodic oxidation with a high recovery ratio and a preparation method of the 7xxx series aluminum alloy plate strip. The 7xxx series aluminum alloy plate strip comprises the following elements of 0.06%-0.12% of Si element, 0.10%-0.25% of Fe element, 4.5%-5.5% of Zn element, 2.0%-3.0% of Mg element, 1.2%-2.0% of Cu element, 0.05%-0.15% of Mn element, 0.10%-0.15% of Er element, 0.10%-0.12% of Zr element, 0%-0.03% of Ti element and the balance aluminum element. The aluminum alloy plate strip is prepared through the steps of reclaimed material grading pretreatment, low-liquid-level semi-continuous casting, multi-stage homogenizing heat treatment, hot rolling, cold rolling, solid solution, pre-stretching, two-stage aging and the like. Through joint optimization of material components and the process, the finished plate strip has excellent mechanical performance, an oxidation film is uniform in color and luster, and salt mist resistance, friction resistance and the like are achieved.

This invention discloses a high-strength, high-toughness Al-Mg-Si alloy, belonging to the field of high-strength, high-toughness aluminum alloy preparation technology. This invention optimizes the alloy composition by adding Cu, Mn, Sc, and Zr elements, and combines this with vacuum melting, homogenization treatment, asymmetric hot extrusion, solution treatment, pre-strain treatment, and three-stage aging treatment processes to synergistically achieve a significant improvement in the strength and toughness of the aluminum alloy. Compared with conventional high-strength, high-toughness aluminum alloy production, the addition of Cu, Sc, Zr, and Mn elements, and the use of asymmetric hot extrusion + solution treatment + pre-strain treatment + three-stage aging treatment processes, results in a significant increase in both strength and toughness through the synergistic effects of grain refinement strengthening, dislocation strengthening, deformation strengthening, and second-phase strengthening. This ensures that the aluminum alloy achieves improved strength and toughness simultaneously, guaranteeing the overall performance of the finished product.

The invention discloses a TiFe-based hydrogen storage alloy and a preparation method thereof, and belongs to the field of metal hydrogen storage materials. The general chemical formula of the TiFe-based hydrogen storage alloy is TiaNdbZrcFedNieMnf, and the atomic percent of each element is as follows: 46 to 53 at% of Ti element, 0.1 to 1.5 at% of Nd element, 1 to 6.5 at% of Zr element, 27 to 40 at% of Fe element, 2 to 10 at% of Ni element and 4.5 to 12 at% of Mn element; wherein Ti, Nd and Zr are first metal elements, Fe, Ni and Mn are second metal elements, and the ratio of the total atomic percent of the first metal elements to the total atomic percent of the second metal elements is 1.05-1.20. The TiFe-based hydrogen storage alloy can be activated at room temperature, has proper hydrogen absorption and desorption platform pressure, and keeps high hydrogen storage capacity and high hydrogen absorption and desorption rate at the same time.

The application discloses a TiAl alloy, a deformation heat treatment method and application, and the alloy is as follows: Ti-(43-48)Al-(0-8)X-(0-0.5)Z, wherein X is one or two or more of Nb, Mo, Cr, Ta, V and Mn elements; Z is one or two or more of Fe, C, N, O, B and Si elements; the alloy is a fine-grain duplex structure, the fine-grain duplex structure is composed of fine-size sheet group and equiaxial gamma grains; the size of the sheet group is 20-40 mu m, the size of the gamma grain is 10-20 mu m, and the volume fraction of the gamma grain is 30-60%; firstly, high-density crystal defects are generated in the original structure by controlling the deformation temperature, the deformation rate and the deformation amount of the pre-deformation treatment; and then, the fine-grain near-sheet structure or the duplex structure is obtained by controlling the holding temperature and the holding time in the isothermal heat treatment process.

The steel sheet according to an aspect of the present invention has a GDS profile of an Mn element and a GDS profile of an Si element, which are observed from the surface to the depth, sequentially including a maximum point and a minimum point, wherein a difference of converted concentration of Mn is 80% or more, and a difference of converted concentration of Si is 50% or more.

The invention discloses a creep-resistant magnesium alloy with high elasticity modulus and high damping and a preparation method thereof, and the creep-resistant magnesium alloy with high elasticity modulus and high damping comprises the following components in percentage by mass: 1.2%-3.5% of Zn element, 2.5%-12% of Gd element, 0.5%-6% of Yb element, 0.15%-1.2% of Ni element, 0.3%-0.8% of Mn element, 0-0.5% of Cu element, 0.1%-5% of HRE element and the balance of Mg element. The HRE element is one or more of a Dy element, a Sm element and a Tb element, and the mixing enthalpy delta H of the creep-resistant magnesium alloy with the high elastic modulus and the high damping is-1.1 kJ / mol to-0.2 kJ / mol. The creep-resistant magnesium alloy with high elastic modulus and high damping is suitable for the fields of aerospace, precise instruments, transportation, 3C electronics and the like, and has remarkable technical and economic values.

The invention discloses a production control method for solving segregation of banded structure manganese of pickling automobile steel SAPH440. The method mainly solves the problems that a black line exists in the thickness direction of strip steel when a user uses a pickled SAPH440 steel strip to produce automobile parts through stamping, analysis shows that the center of a plate blank is segregated and inherited to the center of the strip steel to form Mn element segregation, the black line is pearlite instead of inclusions, but part failures such as follow-up forming and fatigue are possibly affected. The hot-rolled pickled steel plate provided by the invention comprises the following chemical components in percentage by weight: 0.05 to 0.075 percent of C, 0 to 0.05 percent of SI, 0.55 to 0.75 percent of Mn, 0 to 0.02 percent of P, 0 to 0.006 percent of S, 0.035 to 0.055 percent of Ti, 0.01 to 0.06 percent of AL, 0 to 0.006 percent of N and the balance of Fe. The yield strength Re is larger than or equal to 305 MPa, the tensile strength Rm is larger than or equal to 440 MPa, through component design optimization, hot rolling process optimization and acid pickling withdrawal and straightening process optimization, the segregation phenomenon of banded structure manganese is greatly improved, worries of users are solved, the market share is increased, and the good public praise is achieved.

This invention relates to the field of yield strength calculation technology, and in particular to a method for calculating the yield strength of 42CrMo steel used in engineering machinery. The method involves establishing a dimensionless model through data fitting between the yield strength Y1 and the quenching temperature X1, tempering temperature X2, and the mass percentage of Mn element X3: Y1 = 5479 - 2.81X1 - 4.643X2 + 889X3. This invention can accurately reflect the quantitative relationship between the heat treatment process parameters of 42CrMo steel, especially the tempering temperature and the yield strength, enabling the prediction of yield strength. This allows engineers to accurately predict the final properties of the material when formulating the heat treatment process, and to actively and accurately control the yield strength of the material by adjusting the process parameters.

The application discloses a niobium-containing heat treatment-free aluminum alloy and a preparation method thereof, and belongs to the aluminum alloy field. The mass percentage of each component in the alloy is as follows: 7-10% of Si, 0.2-2% of Mg, 0.4-0.75% of Mn, 0.1-0.3% of Fe, 0.05-0.1% of Ti, 0.03-0.1% of Nb, 0.15-0.9% of B, 0.01-0.02% of Sr, the content of other uncontrollable impurity elements is controlled to be less than or equal to 0.5%, and the balance is Al. The ratio of Fe and Mn elements in the alloy is controlled to be 1:2.5-4, the ratio of Nb and B elements is controlled to be 1:5-9, and the ratio of Ti and Nb elements is controlled to be 1:1-2. The Nb and Ti are added in the form of Al-Nb-B intermediate alloy and Al-Ti intermediate alloy respectively. Correspondingly, the application also provides a smelting method of the aluminum alloy. The aluminum alloy prepared by the application has the characteristics of small and uniform grain structure, small and dispersed distribution of eutectic Si particles, improved size and form of Fe-rich phase, high strength and high toughness, and guaranteed fluidity of the alloy material.

A TiFe-based hydrogen storage alloy and a preparation method thereof belong to the field of metal hydrogen storage materials. The chemical general formula of the TiFe-based hydrogen storage alloy is: Ti a Nd b Zr c Fe d Ni e Mn f wherein the atomic percentage of each element satisfies: the atomic percentage of Ti element is 46-53at%, the atomic percentage of Nd element is 0.1-1.5at%, the atomic percentage of Zr element is 1-6.5at%, the atomic percentage of Fe element is 27-40at%, the atomic percentage of Ni element is 2-10at%, and the atomic percentage of Mn element is 4.5-12at%; wherein Ti, Nd and Zr are first metal elements, Fe, Ni and Mn are second metal elements, and the ratio of the total atomic percentage of the first metal elements to the total atomic percentage of the second metal elements is 1.05-1.20. The TiFe-based hydrogen storage alloy can be activated at room temperature, has suitable hydrogen absorption and desorption platform pressure, and simultaneously maintains high hydrogen storage capacity and fast hydrogen absorption and desorption rate.

The invention provides a MnS-Al2O3 composite inclusion detection method, device, equipment and system, and relates to the technical field of defect detection. The method comprises the following steps: acquiring an optical image of a to-be-detected steel plate; determining a potential composite inclusion area in the to-be-detected steel plate based on the optical image, and extracting optical features of the composite inclusion area; inputting the optical features into a pre-trained detection model to obtain an element intensity sequence output by the detection model; the detection model is used for determining a corresponding element intensity sequence according to the optical characteristics; the element intensity sequence comprises cumulative weight percentages corresponding to different elements; if the cumulative weight percentages corresponding to the Al element, the O element, the Mn element and the S element in the element strength sequence are all larger than the cumulative weight percentage corresponding to the Fe element, it is determined that MnS-Al2O3 composite inclusions exist in the potential composite inclusion area. According to the method, the detection precision of the MnS-Al2O3 composite inclusion on the surface of the medium manganese steel can be improved.

The invention provides a pulse energy storage ceramic composition with high-temperature stability and a preparation method thereof, and relates to the technical field of pulse energy storage ceramic materials. The ceramic composition takes a Ba (ZrxTi1-x) O3 calcium-titanium compound as a main component, and also comprises a first component Bi element, a second component Ca element, a third component Sr element, a fourth component Mg element, a fifth component Mn element and a sixth component Si element which are added in a compound form of Bi2O3 and Bi2O3.nTiO2, the dielectric constant temperature coefficient TCC in a wide temperature range of-55 DEG C to 125 DEG C meets-750 + / -120 ppm / DEG C. The ceramic composition has the advantages of high dielectric constant, low dielectric loss, high breakdown field strength and fine grain structure, and is suitable for high-reliability pulse power capacitors.

The invention provides Fe-Mn-Al-C-Zr high manganese steel and a preparation method thereof, and belongs to the technical field of alloy materials. By controlling the content of the Al element, the density of the Al element is lower than that of the Fe element, so that the density of the high-manganese steel is reduced; by controlling the content of the C element, the stability and recovery power of an austenite phase in the high-manganese steel can be improved, internal stress is eliminated, the strength of the high-manganese steel is improved, meanwhile, an interstitial solution strengthening effect is achieved, and the obdurability and wear resistance of the high-manganese steel are improved; the austenite phase region can be expanded by controlling the Mn element content, and the austenite phase stability is improved; the Mn element also has a solid solution strengthening effect, so that the strength of the high-manganese steel can be improved; the content of the Zr element is controlled to ensure that the Zr element and the C element form a precipitated phase (such as ZrC), and the strength is further improved by separating out and strengthening refined grains.

The invention relates to an aluminum alloy plate for an attenuation-resistant ultrathin tank cover material, which comprises the following elements in percentage by mass: 0.07-0.15% of Si element, 0.07-0.15% of Al element, 0.07-0.15% of Al element, 0.07-0.15% of Al element and the balance of aluminum element. 0.15 to 0.3 percent of Fe element; 0.07%-0.15% of a Cu element; 0.3 to 0.5 percent of Mn element; 4.75%-4.95% of an Mg element; 0.01%-0.03% of a Ti element; 0.02 to 0.10 percent of Cr element; 0.01%-0.20% of a Zn element; the total content of the inevitable impurities is smaller than or equal to 0.15%; the sum of the mass of the Mn element and the mass of the Cr element in the aluminum alloy plate for the tank cover material is 0.40-0.55%. After the 0.200-0.208 mm ultra-thin 202 series two-piece can easy-open cover prepared from the aluminum alloy is subjected to 90 DEG C / 40 min water boiling aging attenuation, the pressure resistance is larger than or equal to 700 KPa, and the attenuation amplitude is smaller than or equal to 30 KPa.

The steel sheet for plating according to an aspect of the present invention has a GDS profile of an Mn element and a GDS profile of an Si element, which are observed from the surface to the depth, sequentially including a maximum point and a minimum point, wherein a difference of converted concentration of Mn is 10% or more, and a difference of converted concentration of Si is 10% or more.

The invention relates to 1700MPa-grade high-strength steel for a high-speed plough share rack and a preparation method of the 1700MPa-grade high-strength steel, and belongs to the technical field of steel manufacturing. The high-strength steel comprises the following chemical components in percentage by mass: 0.30%-0.40% of C, 0.2%-1.5% of Si, 0.5%-2.0% of Mn, 0.01%-0.11% of Alt, less than or equal to 0.015% of P, less than or equal to 0.015% of S, 0.01%-0.10% of Ti, 0.002%-0.004% of B and a matrix element Fe. Through the synergistic effect of solution strengthening of the C and Mn elements and hardenability improvement of the B element, a structure with martensite as a matrix is obtained, and it is guaranteed that the tensile strength is larger than or equal to 1700 MPa. And in the steelmaking process, the Mg treatment technology is adopted for inhibiting large-size TiN inclusion, the fatigue life of the material is remarkably prolonged, and the low-temperature toughness of the material is remarkably improved. And uniform laminar cooling is implemented in the hot rolling stage to ensure the consistency of the whole plate width performance of the hot rolled plate. And finally, through a hot pressing quenching process, the strength and performance uniformity of the steel are ensured.

The application discloses a processing method of a 7-series aluminum alloy, and overcomes the contradiction that high strength and high corrosion resistance of the existing 7-series aluminum alloy cannot be compatible, and solves the problems that material performance of the existing 7-series aluminum alloy is not fully utilized or a multi-stage aging process is complicated and has poor applicability. The application can well solve the above problems, the new method is simple to operate, the prepared 7-series aluminum alloy material has higher strength and better corrosion resistance, and meets the use requirement; in addition, combined with optimization of a chemical composition, addition of certain Zr and Sc elements, synergistic inhibition of recrystallization, the strength of the aluminum alloy is improved, combined with the Mn element, synergistic provision of the toughness of the aluminum alloy, the Sc forms Al3Sc nanoparticles, refines the structure and improves the corrosion resistance, combined with a subsequent processing process, further reduction of galvanic corrosion of grain boundary precipitates, and overall, the 7-series aluminum alloy with the strength, toughness and corrosion resistance meeting the requirement is obtained.

The invention provides a heat-treatment-free aluminum alloy and a preparation method thereof. The heat treatment-free aluminum alloy comprises the following elements in percentage by mass: 5.7-6.2% of Mg element; 2.3 to 2.9 percent of Si element; 1.9%-2.3% of a Zn element; 0.5 to 1.0 percent of Mn element; the total content of the inevitable impurities is smaller than or equal to 0.15%, and the balance is the element Al; the mass content of the MgZn2 phase in the heat treatment-free aluminum alloy is 3.20 to 5.04 percent; the mass content of an Al6Mn phase in the heat treatment-free aluminum alloy is 0.11 to 0.32 percent; the tensile strength of the heat-treatment-free aluminum alloy ranges from 345 MPa to 385 MPa, and the yield strength ranges from 230 MPa to 265 MPa. The aluminum alloy is simple in element composition, the element types and content of the heat-treatment-free aluminum alloy are controlled within the range, and the strength and the casting performance can be both considered.

The steel sheet for plating according to an aspect of the present invention has a GDS profile of an Mn element and a GDS profile of an Si element, which are observed from the surface to the depth, sequentially including a maximum point and a minimum point, wherein a difference of converted concentration of Mn is 10% or more, and a difference of converted concentration of Si is 10% or more.

The application discloses an easily-activated high-capacity TiFe-based hydrogen storage alloy and a preparation method thereof. The chemical composition of the alloy is Ti a Fe b Mn c N d RE e , and the microstructure of the alloy comprises a TiFe main phase and a second phase dispersedly distributed, the distribution density is not less than 1800 / mm2, and the fluctuation of the counting rate of the Mn element in the TiFe phase within a range of 30 microns in length is not more than ±15% of the average value. The alloy is subjected to first hydrogen absorption at 25 DEG C and 5 MPa hydrogen pressure, the hydrogen absorption amount of the alloy within 10000 seconds reaches more than 90% of the maximum hydrogen storage capacity, the maximum hydrogen storage capacity is greater than 1.85wt.%, the hydrogen release platform slope factor F is lower than 0.5, and the alloy can realize rapid hydrogen absorption without high-temperature activation. The alloy is an ideal solid-state hydrogen storage material with high capacity, low platform slope, excellent activation performance and low manufacturing cost, and is suitable for a solid-state hydrogen storage device for scale energy storage.

The present invention discloses a sodium ion layered oxide material with a coating layer. The structural general formula of the sodium ion layered oxide in this material is NaxTMO2, including at least one of the O3 type and the P2 type; the coating layer is molybdenum disulfide and conductive carbon, and the TM is a combination of at least two of the transition metal elements Ni, Fe, Cu, Ti, Ag and the Mn element; the x is a positive number, and 0 < x ≤ 1. The present invention also discloses a preparation method and application of the above material. The material prepared by the method of the present invention can both effectively improve the rate performance of the material by constructing a continuous electron conduction network; and can regulate the formation process of the active sites on the positive electrode surface and the electrolyte interface layer, thereby reducing the interface transfer impedance during the ion deintercalation process; in addition, the surface coating can isolate the erosion of the humid air on the positive electrode material and inhibit the side reaction between it and the electrolyte. Therefore, the cycle stability of the composite coated layered oxide material is effectively improved.