182 results about "MAX phases" patented technology

The invention discloses a broadband wave-absorbing material based on an MAX-phase metasurface structure and an impedance matching optimization method of the broadband wave-absorbing material. The wave-absorbing material comprises an MAX-phase ceramic substrate and periodic metasurface structures which are arranged on the surface of the MAX-phase ceramic substrate in an array mode and composed of conductive resonance units. The resonance units are isolated through gaps, an equivalent R1L1C1 series resonance circuit is formed in an electromagnetic field, and a base body is equivalent to a parallel resistor R2. By establishing an equivalent circuit model and optimizing parameters R1, L1, C1 and R2, impedance matching of the wave-absorbing material in a target frequency band can be regulated and controlled, so that the wave-absorbing material at least has an absorption peak of which the reflection loss is less than-10 dB. According to the optimization method, electromagnetic simulation and circuit simulation are combined, optimized circuit parameters are reversely mapped into structure geometric parameters, material preparation is guided, and accurate design and broadband absorption of the wave absorbing performance are achieved.

The invention discloses a silane coupling agent grafted MXene composite material and a preparation method thereof, relates to the technical field of composite materials, and aims to provide a surface modification method to enable the MXene composite material to be in good contact with a PDMS (polydimethylsiloxane) material. The surface modification method comprises the following steps: S1, performing wet chemical etching on an MAX phase material in combination with mechanical stripping to obtain a few-layer MXene dispersion liquid; s2, strong base is added into the few-layer MXene dispersion liquid in the step S1, the PH value of the few-layer MXene dispersion liquid is adjusted, a reaction is conducted in the argon environment, and hydroxyl modified MXene dispersion liquid, namely h-MXene dispersion liquid is obtained; and S3, adding a silane coupling agent and a catalyst into the h-MXene dispersion liquid in the step S2, and reacting in an argon environment to obtain the silane coupling agent grafted MXene composite material.

The invention relates to a preparation method of an MAX phase material. According to the specific technical scheme, precursor powder materials needed for preparing the MAX phase material are mixed to obtain mixed powder, the mixed powder is subjected to mechanical ball milling and cold press forming to form a blank, a to-be-sintered blank is obtained, the to-be-sintered blank is subjected to ultra-fast Joule hot sintering, and the MAX phase material is prepared. The MAX phase material is prepared by using an ultra-fast Joule thermal sintering method, the Joule thermal sintering method has the characteristics of high heating and cooling rate (104 DEG C / min) and high heating temperature (3000 DEG C), and according to the Arrhenius formula, the synthesis rate of the MAX phase material can be greatly improved due to the characteristics of high heating and cooling rate and high heating temperature, and rapid preparation of the MAX phase material is realized. According to the method, the preparation period of the MAX phase material can be greatly shortened, so that the aging can be improved, the energy consumption can be reduced, accurate and controllable preparation can be realized, and the method has important significance on low-cost and large-scale preparation of the MAX phase material.

A hardened alloy composite material comprising an alloy matrix and reinforcing particles dispersed in the alloy matrix, the reinforcing particles having a shell and core structure, wherein the shell and the core have different chemical compositions, and wherein the reinforcing particles are formed by a MAX phase compound and / or a MAB phase compound.

The present invention specifically relates to a copper-based powder metallurgy friction material containing a pretreated MAX phase and its application. The raw materials used in the present invention include pre-burned powder, copper powder, nickel powder, iron powder, tungsten powder, graphite powder, boron carbide powder, and zirconium oxide powder. The raw materials used in the pre-burned powder are composed of copper powder A and Ti2AlN in a mass ratio of copper powder A:Ti2AlN = 1-6:1. The material is prepared by a process of ball milling followed by pre-burning, wherein the ball milling speed is 100-200 r / min and the time is 12-28 hours; the pre-burning temperature is 500-900°C and the time is 140-160 minutes. The preparation method of the product of the present invention includes the preparation of pre-burned powder, mixing, pressing and sintering. The resulting product has high hardness, friction coefficient, friction stability coefficient, compressive strength, and shear strength, and has a low wear rate on the brake disc. The components of the present invention are rationally designed, the process is simple and controllable, and the resulting product has excellent performance and is easy to industrialize and apply.

The invention relates to the technical field of silica powder surface modification, in particular to a novel silica powder surface modification method and application of a composite material of the novel silica powder surface modification method. Silica powder surface modification comprises the steps that silica powder is subjected to surface chemical modification through a titanate coupling agent, active functional groups are introduced, and the interface bonding force between the silica powder and MXene is enhanced; high-quality preparation of MXene: etching an MAX phase by adopting hydrofluoric acid (HF) or lithium fluoride / hydrochloric acid (LiF / HCl), and obtaining few layers of MXene nanosheets through ultrasonic stripping to ensure high conductivity and large specific surface area; the modified silica powder and MXene dispersion liquid are uniformly mixed, MXene stacking is inhibited, the specific surface area is increased, and the ion transmission efficiency is improved; mXene nanosheets grow on the surface of the silica powder in situ to form a core-shell structure, so that the interface bonding strength and the mechanical property are enhanced; the composite material is applied to the fields of electromagnetic shielding, energy storage, flexible electronics and the like.

The invention discloses Si-based MAX phase powder and a preparation method thereof, and belongs to the technical field of ceramic material preparation. The preparation method of the Si-based MAX phase powder comprises the following steps: mixing a transition metal source, polysiloxane, a solvent, a curing agent and a platinum catalyst to obtain a mixed solution; the curing agent is vinyl modified siloxane; heating and curing the mixed solution to obtain a solid precursor; and crushing the solid precursor into powder, and then carrying out pressureless sintering in a protective atmosphere, thereby obtaining the product. According to the method, subsequent ball milling and other procedures are omitted, and impurity introduction to the product is avoided. According to the invention, the operation difficulty is greatly reduced, the production efficiency is improved, the energy consumption is reduced, and large-scale and low-cost production is realized.

The invention discloses metal ceramic MAX-phase composite powder for spraying and a preparation method of the metal ceramic MAX-phase composite powder, and belongs to the field of metal ceramic composite materials. The method comprises the following steps: mixing Ni powder, Cr powder and Cr2AlC nano powder with deionized water, a binder and a dispersant according to a specific ratio, and carrying out wet ball milling to prepare uniform slurry; carrying out spray granulation to obtain primary spherical powder; and finally, carrying out spheroidizing treatment on the primary powder by adopting radio frequency plasma under the protection of inert gas to obtain a final product. The core of the preparation method is that through an optimized two-step process, many limitations in the application aspect of an existing MAX phase material are solved, and the composite powder which is high in sphericity degree, good in flowability, compact in interior and stable in MAX phase component is successfully prepared. The powder can be directly used for thermal spraying, and an ideal raw material is provided for preparing a high-performance MAX-phase metal ceramic coating.

The invention discloses a Ti-Nb-Zr / MAX phase / Cr-C-N multi-layer composite coating bipolar plate and a preparation method thereof. The multi-layer composite coating sequentially comprises a Ti-Nb-Zr alloy transition layer, an MAX phase middle layer and a Cr-C-N nano composite surface layer from inside to outside. According to the Ti-Nb-Zr / MAX phase / Cr-C-N multi-layer composite coating bipolar plate and the preparation method thereof, through the synergistic effect of the Ti-Nb-Zr alloy transition layer, the MAX phase middle layer and the Cr-C-N nano composite surface layer, the comprehensive optimization of the coating performance is realized: the Ti-Nb-Zr alloy transition layer provides excellent matrix adhesive force and stress buffer effect; the MAX-phase intermediate layer provides a main corrosion-resistant barrier and self-repairing capability; the Cr-C-N nano composite surface layer provides low contact resistance and good surface stability; and meanwhile, the interlayer stress is effectively reduced by utilizing the gradient transition region, the bonding strength and long-term stability of the coating are improved, and the comprehensive performance of the multi-layer composite coating bipolar plate is effectively improved.

The present invention provides a halogen-free MXene represented by the following formula (1), that has no halogen in its surface functional group by performing an etching process to generate MXene from a MAX Phase material, and after the etching process, performing an impurity removal treatment process of etching and removing impurities using a halogen-free etchant and a halogen-free post-treatment agent, respectively.Mn+1XnTx  [Formula 1]wherein, M is a transition metal element selected from the group consisting of Sc, Ti, V, Cr, Mn, Y, Zr, Nb, Mo, Hf, and Ta, X is at least one of carbon and nitrogen, and n is an integer from 1 to 4, and Tx is a functional group selected from the group consisting of oxygen, alkoxide of 1 to 5 carbon atoms, alkyl, carboxylate, hydroxide, hydride, oxide, sub-oxide, nitride, sub-nitride, sulfide, sulfonate, thiol, and epoxide.

The invention discloses a preparation method of an MXene reinforced Cu-based composite material with strong interface bonding, and belongs to the technical field of composite material preparation. According to the method, an MAX phase material is adopted, few layers of MXene are mixed with copper salt, and MXene with Cu or Cu2O single or mixed nano-particles uniformly deposited is formed; then mixing with copper powder or copper ions to obtain MXene / Cu composite powder; and finally, the MXene / Cu composite material with strong interface bonding is obtained through sintering. According to the preparation method, the spontaneous reduction deposition reaction of MXene with high reaction activity and Cu ions is utilized, and the structure and distribution of deposited nano-particles are subjected to interface regulation and control, so that tight interface combination between a copper matrix of the composite material and MXene is realized, inelastic scattering of carriers at an interface is reduced, the interface load transmission capacity is enhanced, and the mechanical property of the composite material is improved. Therefore, the strengthening efficiency of the MXene on the copper matrix is obviously improved; the prepared copper-based composite material has excellent mechanical and electrical properties, the yield strength of the copper-based composite material ranges from 295 MPa to 564 MPa, and the electric conductivity of the copper-based composite material is kept at 84.5%-94.5% IACS (International Annealed Copper Standard). The composite material is simple in preparation process and low in cost, and has the potential of large-scale industrialization.

A preparation method and application of a defect-ordered hexagonal pore structure antioxidant MXene material, comprising mixing hexagonal pore MAX phase Ti3AlC2 with CuCl2 and NaCl, loading into alumina corundum squares, and covering with a NaCl salt bed boat, placing the mixture in a muffle furnace, and sintering at a constant temperature of 820°C for 3 hours in an air atmosphere; after washing to remove impurities, the mixture is filtered, vacuum dried, and ground to obtain a defect-ordered hexagonal pore structure antioxidant. The advantages are: a simple and reasonable process, and under the joint action of trace amounts of metal oxides on the surface of the MXene material, an effective barrier against attacks by oxygen and water molecules is constructed, significantly improving the antioxidant properties of the MXene material.

The invention provides an MAX phase / alumina layered composite ceramic and an in-situ synthesis preparation method thereof, and the method comprises the following steps: respectively preparing an alumina matrix layer and an MAX phase interface layer through a tape casting method, then alternately laminating the alumina matrix layer and the MAX phase interface layer, and finally carrying out hot pressed sintering to obtain a layered composite ceramic product. According to the invention, the layered composite ceramic which takes aluminum oxide as a matrix and MAX-phase ceramic as an interlayer is prepared through an in-situ synthesis technology, so that the effects of great toughening, strength increase without reduction and high damage tolerance are realized, and the fracture mode is converted from brittle fracture of aluminum oxide ceramic to safe stepped fracture. The strength and toughness of the aluminum oxide ceramic are successfully balanced and synergistically improved, and the industrial problem that strength and toughness cannot be both considered in a traditional aluminum oxide ceramic toughening technology is solved.

The invention discloses a preparation method of a medium-entropy MAX phase based on zirconium component regulation and control, which comprises the following steps: 1) material preparation: titanium, vanadium, zirconium, niobium, aluminum and graphite powder are used as raw materials, and the molar ratio of the zirconium element phase in transition metal elements is 8-25%; and 2) sintering: uniformly mixing all the raw materials, and carrying out sintering reaction under the condition of argon Ar protective atmosphere to obtain the medium-entropy MAX phases with different configurations. The controllable preparation of the quaternary medium-entropy MAX phase with brand new element combination is realized by accurately regulating and controlling the molar ratio of the zirconium element in the (Ti, V, Zr, Nb) n + 1AlCn system, and the phase purity is obviously improved; and the medium-entropy MXene material is further prepared by taking the medium-entropy MAX phase as a precursor. The prepared medium-entropy MAX phase has a compact layered structure, and the derived medium-entropy MXene presents an ultrathin and stable two-dimensional lamellar morphology, so that the medium-entropy MXene shows abundant electrochemical active sites and excellent conductivity, and shows good application prospects in many fields.

The invention provides a nanometer Al3Ti reinforced aluminum-based composite material and a preparation method thereof, and relates to the technical field of aluminum-based composites.The preparation method comprises the following steps that MAX-phase ceramic particles and aluminum raw material powder are mixed and then subjected to first ball milling treatment, and first mixed powder is obtained; wherein the MAX phase ceramic particles are micron-sized ceramic particles; the first mixed powder is heated, the MAX phase reacts with Al to form A13Ti, and second mixed powder is obtained; the second mixed powder is subjected to second ball milling treatment, and third mixed powder is obtained; wherein the average particle size of A13Ti in the third mixed powder is nanoscale; and the third mixed powder is subjected to aftertreatment, and the nanometer Al3Ti reinforced aluminum matrix composite is obtained. According to the method, a nanometer strengthening phase is introduced into an aluminum matrix in a rough-to-fine mode, and the problem that when nanometer raw material powder is directly added, nanometer particles are agglomerated, and consequently the strength and plasticity of the composite material are poor is solved.

This invention discloses a coatable, moldable dual-functional coating material for heat protection and stealth, and its preparation method. The coating material is formed from a SiC-based composite ceramic aerogel slurry, a perovskite / MAX phase composite ceramic absorber, and a high-temperature resistant binder. The composite ceramic aerogel slurry is composed of SiC micro / nano-scale aerogel powder, SiC nanowires, and a high-temperature resistant binder; the perovskite ceramic absorber is lanthanum strontium manganese oxide (La). 1‑x Sr x MnO3), lanthanum strontium iron oxide (La) 1‑ x Sr x FeO3), lanthanum strontium cobalt oxide (La) 1‑x Sr x The MAX phase ceramic absorber is Ti3SiC2, and it contains substances such as CoO3. The technology of this invention enables the rapid application of coating materials to the surface of equipment via brushing, enhancing high-temperature radar absorption stealth and thermal protection capabilities, and facilitating the preparation and efficient repair of high-temperature stealth coatings.

This invention proposes a mullite composite brick, its preparation method, and its applications, belonging to the field of refractory materials technology. MXene is prepared by etching the MAX phase with hydrofluoric acid, and Si / Al oxide intercalated MXene is prepared by sol-gel reaction. After modification with polydopamine, intercalated montmorillonite is obtained by adding it to a sodium-based montmorillonite suspension. This intercalated montmorillonite is then uniformly mixed with a binder, high-alumina bauxite, and silicon carbide powder, machine-pressed, and calcined to obtain the mullite composite brick. The mullite composite brick prepared by this invention has good thermal insulation, heat insulation, refractory, and mechanical properties, excellent alkali resistance, improved bonding strength, and extended service life. It also has excellent thermal insulation effect, reduces heat loss, and thus plays a role in energy saving, showing broad application prospects.

The invention provides a preparation method and application of a sodium cobalt hexacyanoferrate composite material based on three-dimensional honeycomb MXene. The composite material is prepared through the following steps that 1, a Ti3AlC2 MAX phase reacts with a mixed solution of lithium fluoride (LiF) and concentrated hydrochloric acid (HCl), an Al atomic layer is removed through etching, and layered MXene is obtained; 2, mixing the layered MXene with a polymethyl methacrylate (PMMA) template, centrifuging, washing, drying and calcining to prepare three-dimensional honeycomb MXene; and 3, dispersing the three-dimensional honeycomb MXene in deionized water, sequentially adding a cobalt source and a sodium ferrocyanide (Na4Fe (CN) 6) solution, and carrying out an in-situ coprecipitation reaction to obtain the composite material. In the composite material, the sodium cobalt hexacyanoferrate is of a cubic structure and is uniformly embedded into a three-dimensional honeycomb MXene framework. The composite material disclosed by the invention is applied to a water-based sodium-ion battery positive electrode material, and has high conductivity, excellent rate capability and cycling stability.

In one general approach, a method for fabricating a MXene includes etching a MAX phase for selectively removing an A group element from the MAX phase, thereby forming a multilayer MXene. The multilayer MXene is then intercalated and exfoliated. In another general approach, a method for fabricating a MXene includes contacting a MAX phase with an acid and a fluorophosphate salt in a nonaqueous solvent for selectively removing an A group element from the MAX phase, thereby forming a multilayer MXene. The multilayer MXene is then intercalated and exfoliated.

The invention provides an aging treatment in-situ reinforced metal ceramic composite coating and a preparation method and application thereof. The preparation method comprises the following working procedures that metal powder and ternary layered metal ceramic MAX phase powder are mixed to obtain mixed powder; spraying the mixed powder on the surface of a workpiece matrix to obtain a precursor coating; and aging treatment is conducted on the precursor coating, and the metal ceramic composite coating is obtained. The aging treatment is carried out in an oxygen-containing atmosphere. According to the metal ceramic composite coating component design and the preparation process, nanoscale ceramic particles can be generated in an in-situ oxidation strengthening mode, compared with the mode that hard ceramic is directly added into the coating, better interface bonding is formed between the ceramic particles generated in situ and metal, the performance is stable, higher hardness is achieved, and the service life of the coating is prolonged. And on the premise that the toughness of the coating is not influenced, the high temperature resistance and the wear resistance of the metal ceramic composite coating can be remarkably improved.

According to the method for rapidly testing the growth tendency of the metal whiskers and growing the metal whiskers in situ, the MAX phase serves as an A metal atom source, the growth tendency of the metal whiskers is rapidly tested, and a new technology for preparing the metal whiskers in a large scale is developed by means of the phenomenon. According to the method, an MAX phase and an alloy matrix form metallurgical bonding through hot pressing, active A atoms are provided for growth of the metal whiskers, and therefore reliable and rapid detection of the growth tendency of the metal whiskers on the to-be-detected alloy is achieved. The innovation and significance of the invention are as follows: (1) A-site atoms provided by the MAX phase are utilized to test the accommodation limit of different alloy components and organization structures to active A atoms, a new rapid and reliable metal whisker growth tendency evaluation technology is developed, and the method has important significance in evaluation of Sn whisker growth problems in electronic connection; and (2) a new technology for in-situ and rapid growth of the metal whiskers in the metal matrix is developed, and a new technical approach is provided for preparation of micro-nano devices such as MEMS (micro-electromechanical systems) and the like.

The application discloses a high-temperature high-strength high-entropy MAX phase bulk material and a preparation method thereof. The high-temperature high-strength high-entropy MAX phase bulk material is expressed as M2AX, M is a combination of any four or more of Ti, Zr, V, Nb and Ta, the atomic percentage of each component in the M sublattice is between 5% and 35%, the sum of the atomic percentages of Zr and V is less than or equal to 16.7%, A is an Al element, and X is a C element. The bulk MAX phase material is prepared by a spark plasma sintering method. The high-temperature high-strength high-entropy MAX material prepared by the application has high purity and excellent mechanical properties at room temperature and high temperature, can be used for preparing high-temperature structural parts under special working conditions, and has a wide application prospect in the high-temperature field.

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 discloses ceramic heat insulation paper based on an MAX phase material and a preparation method of the ceramic heat insulation paper, and belongs to the technical field of special ceramic materials. The invention discloses ceramic heat insulation paper based on an MAX phase material. The formula of the ceramic heat insulation paper comprises 30-40 wt% of the MAX phase material, 25-30 wt% of an organic solvent, 20-25 wt% of a precursor and 0.3-0.5 wt% of a catalyst. The synergistic effect of the MAX phase material and the polymer precursor enhances the thermal stability and mechanical strength of the material; through high-temperature sintering at 1400 DEG C in combination with a nitrogen atmosphere, the high-temperature resistance of the material is remarkably improved, the oxidation resistance of the material is enhanced, the material is not prone to oxidation in a high-temperature environment, the service life is prolonged, and the material can be stably used in an extremely high-temperature environment; and a porous structure with high porosity and uniform pore size distribution is formed through the heating rate of 10 DEG C / min and speed-controlled cooling, so that the heat conductivity coefficient is effectively reduced.

The invention discloses a radar and infrared compatible stealth coating as well as a preparation method and application thereof, and relates to the field of radar and infrared compatible stealth, the preparation method comprises the following steps: S1, preparing magnetic wave-absorbing powder by adopting a hydrothermal method; s2, mixing the wave-absorbing powder with a coating adhesive and a thickening agent to obtain coating slurry, and pouring the coating slurry into a mold for drying to obtain a radar stealth coating; s3, the MAX phase material is etched, and an MXene aqueous dispersion liquid is obtained; and S4, coating the radar stealth coating with the coating adhesive, then coating the radar stealth coating with the MXene aqueous dispersion, drying, and repeatedly coating for 1-3 times to obtain the radar and infrared compatible stealth coating. The surface of the fabric is coated with the composite coating, the minimum reflection loss within the frequency band of 8-18 GHz reaches-61.81 dB, the effective absorption bandwidth reaches 8.78 GHz, the infrared emissivity under the wave bands of 3-5 microns and 8-14 microns is 0.260 and 0.172 respectively, and high-performance infrared and radar dual-waveband stealth is achieved.

The invention discloses an in-layer ordered nano layered structure ceramic prepared by a leap-type all-solid-phase reaction and a preparation method thereof, and the preparation method comprises the following steps: mixing commercially purchased Ti2AlC powder and MC (M = Ti, Ta, W) powder according to a standard molar ratio of 1: 1, carrying out ball milling after mixing, and then sintering by adopting a spark plasma sintering furnace to obtain the in-layer ordered nano layered structure ceramic. And after the sintering temperature rises to the set temperature of 1100-1600 DEG C, furnace cooling is carried out, a surface carbonization layer is removed, and the sample Ti2MAlC2 (M = Ti, Ta and W) is obtained. The prepared Ti2MAlC2 (M = Ti, Ta, W) is in-layer ordered nanometer layered structure ceramic, and belongs to 312 phases in MAX phase ceramic. According to the method, the difficulty of multi-component synthesis is remarkably reduced, and a new normal form is developed for MAX phase doping research.

This invention discloses a high-thickness, high-purity MAX phase coating and its preparation method. The method includes: 1. Mixing a metal oxide and a carbon source, followed by high-energy ball milling and spray granulation to prepare spherical precursor powder; 2. Depositing a transition layer on a sandblasted substrate surface using plasma spraying, and then depositing the spherical precursor powder on the transition layer to form a precursor coating; 3. Immersing the substrate with the precursor coating in molten salt for electrolysis, causing the precursor coating to be electro-deoxidized and converted into a MAX phase coating. This invention employs a synergistic process of "plasma spraying-molten salt electrochemical conversion," converting the sprayed precursor coating into a MAX phase coating through in-situ electro-deoxidation in molten salt electrochemistry. This process has high deposition efficiency and avoids the defects of carbon loss, phase decomposition, and oxidation in the coating product when directly thermally spraying MAX materials. It achieves the preparation of a high-thickness, high-purity MAX phase coating, suitable for the field of surface protection.

The invention belongs to the technical field of nuclear energy materials and surface engineering, and particularly relates to application of an MAX phase coating in a lead bismuth environment. The MAX phase coating is deposited on the surface of the structural material, so that the corrosion resistance and wear resistance of the steam generator can be remarkably improved. The result shows that under the conditions that the temperature is 450 DEG C, the normal load is 50N, the displacement amplitude is 75 microns, the vibration frequency is 25Hz and the cycle index is 106, a stable aluminum oxide oxidation layer and a compacted abrasive dust layer can be formed, so that the Ni element is effectively prevented from being dissolved, and the corrosion rate of a structural material is reduced; meanwhile, the abrasion depth of the structural material is reduced by 70% compared with that before protection, the structure is stable, the binding force is high, and the structural material is still kept complete and has no obvious peeling or failure phenomenon even in a long-cycle test.

The application discloses a method for growing a coating on an aluminum surface in situ, aluminum foil, an aluminum-based current collector, an electrode and a battery, wherein the method comprises: covering the surface of metal aluminum or an aluminum alloy with a MXene material, and then performing a heating treatment at a predetermined temperature; the functional groups of the MXene material contain one or more of F, Cl, Br or I. The method provided by the application can form a coating containing a MAX phase material on the surface of aluminum or an aluminum alloy in situ, the MAX phase material is a kind of ceramic, has the advantages of high conductivity and corrosion resistance, and the formed coating improves the corrosion resistance of the surface of aluminum or the aluminum alloy.