181 results about "Surface chemical" patented technology

The invention discloses a production process of activated carbon with efficient adsorption performance, and belongs to the technical field of porous carbon material preparation. The preparation method comprises the following steps: by taking biomass as a raw material, compounding the biomass with a eutectic salt system consisting of zinc chloride and potassium chloride, a nitrogen source precursor and a sacrificial cation source to obtain a homogeneous reaction precursor; the key point is that the precursor is subjected to programmed variable-pressure pyrolysis treatment under the condition that the temperature is far lower than the traditional activation temperature. According to the process, deep infiltration of molten salt is achieved through initial pressurization operation, and then reaction gas is guided to escape orderly through a later programmed pressure reduction process. Through collaborative innovation of the composition and the process, multiple steps of carbonization, activation, pore forming, in-situ functionalization and the like are integrated in a single low-temperature reaction unit, and the technical problems that a traditional method is high in energy consumption and long in flow, and the physical structure and surface chemistry of a material are difficult to synchronously regulate and control are solved.

The embodiment of the invention provides a catalyst activity analysis method and system based on material surface physical and chemical indexes, and relates to the technical field of water treatment. According to the method, a sample data set can be obtained firstly, after the sample data set is divided into a training set and a test set, the training set is used for training a plurality of alternative models, and then a prediction model is selected from the alternative models. And inputting data of a catalyst to be detected into the prediction model to obtain a predicted degradation rate output by the prediction model. Wherein the sample data set comprises surface physical property parameters such as pore depth gray difference of the catalyst and surface chemical property parameters such as functional group peak height ratio. According to the method, alternative model training can be carried out through Bayesian optimization, a prediction model is selected by combining evaluation indexes obtained by calculation of a test set, and a machine learning process can be enhanced by utilizing multi-mode fusion data in an environment of small sample machine learning data volume, so that the prediction precision and generalization ability of catalyst activity analysis are improved.

The invention relates to the technical field of environmental waste treatment, and discloses a preparation method of modified household garbage incineration fly ash, the modified household garbage incineration fly ash comprises the following components by mass: 90-99 parts of a fly ash matrix; 0.1 to 2 parts of a plasma activation layer; 0.5 to 8 parts of a silicon oxide coating layer; the preparation method comprises the following steps: pretreating the fly ash; performing plasma activation; preparing a mineralizing solution; performing biomimetic mineralization; and calcining at low temperature. The plasma activation layer is introduced, the silicon oxide coating layer is constructed, and the phosphorus oxide or the boron oxide is cooperatively introduced, so that the microstructure and the surface chemical property of the material are effectively optimized, the specific surface area and the pore volume of the material are increased, and a microporous, mesoporous and macropore synergistic multistage pore channel structure is constructed; the adsorption capacity and the adsorption rate of various waste gas pollutants are improved.

The application discloses a preparation method and application of nitrogen-doped oxygen-rich hierarchical porous carbon, and adopts a one-step co-activation method to prepare the nitrogen-doped oxygen-rich hierarchical porous carbon, which is simple in process and low in energy consumption. The structure and surface chemical performance of the prepared nitrogen-doped oxygen-rich hierarchical porous carbon catalyst are easy to control. The prepared TNS-X material has a large specific surface area and a developed pore structure, which is beneficial to exposure of catalytic sites and diffusion of reactants. Through ammonia and water vapor co-activation, efficient doping of nitrogen atoms and oxygen atoms is realized, the number of catalytic sites is increased, and the catalytic activity is improved. The TNS-800 material exhibits high catalytic performance in a peroxymonosulfate (PMS) activation process, and can completely remove organic pollutants such as acetylaminophenol in a short time.

The invention provides a diamond / metal connector and a brazing method thereof based on femtosecond laser modification, and relates to the technical field of material processing and connection.The method for brazing diamond and metal based on femtosecond laser modification comprises the steps that femtosecond laser is adopted to conduct scanning treatment on the surface of diamond, so that a graphite layer is formed on the surface of the diamond; performing magnetron sputtering of active elements on the surface of the graphite layer to deposit an active layer; and vacuum heat treatment is conducted at the temperature of 500-800 DEG C, and then the diamond and the metal are brazed. Due to the ultra-short pulse and ultra-high peak power characteristics of the femtosecond laser, non-hot-melting accurate etching of the diamond surface can be achieved, sp3 carbon is induced to be converted into sp2 graphite phase, a nano-graphite transition layer is controllably formed, the surface chemical activity is remarkably improved, the chemical bonding strength of an active element layer and the diamond is remarkably enhanced, and the service life of the diamond is prolonged. And the active element reacts with the nano-graphite layer to generate a continuous active element-C compound, so that strong metallurgical bonding is realized.

The invention discloses a preparation method of a high-strength corrosion-resistant copper alloy wire. The preparation method comprises the following steps: (1) preparing composite powder; (2) preparing pretreatment powder; (3) sensitization treatment and activation are carried out, surface chemical copper plating is carried out on the activated powder, and copper plating powder is obtained; (4) weighing copper powder, nickel powder, silicon powder and copper-plated powder, heating and melting, adding the copper-plated powder into the melt, casting and molding, heating to eliminate stress, cooling, and drawing into a copper alloy wire by using a wire drawing machine; and the copper alloy wire is subjected to heat preservation for 30 min at the temperature of 220 DEG C, then the temperature is increased to 300 DEG C, heat preservation aging is conducted for 3 h, furnace cooling is conducted to 200 DEG C or below after heat preservation is completed, then the copper alloy wire is taken out and subjected to air cooling to the normal temperature, and the high-strength corrosion-resistant copper alloy wire is obtained. The copper alloy casting prepared through the method has high tensile strength, and the prepared copper alloy wire is high in self-corrosion potential and shows good strength and corrosion resistance.

The application provides a solid super-smooth surface and a construction method and application thereof, and relates to the technical field of marine antifouling. The solid super-smooth surface constructed by the application is composed of linear polyfluorosiloxane, the linear polyfluorosiloxane is combined with a substrate through a chemical covalent bond, the chemical covalent bond is firm, the problem that traditional biomimetic super-smooth surface lubricating oil is prone to loss in an underwater environment is solved, and the solid super-smooth surface has a longer performance of preventing and treating biological fouling. The solid super-smooth surface provided by the application has a linear structure and reliable underwater transparency, and the underwater visible light transmittance of the material can reach more than 95%.

The invention relates to the technical field of lithium ion battery materials, discloses a preparation process and application of a nano silicon-carbon composite graphite material, and provides a preparation process for solving the problem: carrying out oxidation and surface chemical modification on silicon particles to construct a stable chemical bonding interface to resist mechanical stress; on the basis of primary carbon coating, graphene and carbon nanotubes are introduced to construct a multi-stage conductive carbon network with point, line and surface combination, so that efficient and stable electron transmission is ensured; a uniform inorganic protective coating is accurately coated on the surface of the composite material through in-situ chemical reaction so as to shield chemical side reaction. The material prepared by the invention shows excellent performance: the powder conductivity of the material reaches up to 21.5 S / cm, which is far beyond that of a conventional conductive agent scheme; the coulombic efficiency is improved to 92.3% for the first time; and after 500 cycles at the multiplying power of 0.5 C, the capacity retention ratio still reaches up to 85.3%, and the comprehensive electrochemical performance of the material is improved.

The invention belongs to the technical field of materials, and particularly relates to a GaO-coated Mo2C MXene surface chemical adsorption type heterojunction composite material and a preparation method and application thereof. The preparation method comprises the following steps: (1) adding Mo2Ga2C powder into an NH4Cl solution, uniformly mixing, and transferring to a reaction container; (2) hydrothermal reaction; the temperature of the hydrothermal reaction is 200 to 220 DEG C; and (3) after the hydrothermal reaction is finished, carrying out solid-liquid separation, washing and drying to obtain the GaO (at) Mo2C MXene surface chemical adsorption type heterojunction composite material. According to the preparation method disclosed by the invention, synchronous preparation and stable chemical adsorption combination of GaO zero-dimensional particles and Mo2C MXene can be realized; according to the preparation method disclosed by the invention, the preparation process is remarkably simplified, the preparation period is shortened, the production cost is reduced, and the lithium storage performance of the heterojunction is favorably improved.

Methods disclosed herein relate to generating silk nanoparticles with a low polydispersity index (PDI). Methods include adding a silk solution dropwise into a volatile solvent that is miscible with water, thereby forming a precipitate-bearing solution and applying shear forces to the precipitate-bearing solution for a length of time sufficient to achieve evaporation of at least 95% of the volatile solvent, thereby producing a population of silk fibroin nanoparticles in water having a polydispersity index (PDI) of 0.35 or less, including but not limited to, a PDI of 0.330 or less, 0.325 or less, 0.315 or less, 0.310 or less, 0.30 or less, 0.275 or less, 0.250 or less, 0.225 or less, or 0.200 or less. Parameters related to silk fibroin molecular weight, silk fibroin concentration, shear force application, and temperature may all be modified to achieve silk nanoparticles of a particular size exhibiting particular PDIs.

The application discloses a kind of high-performance tin copper composite conductive paste and preparation method thereof, belong to electronic material technical field.The conductive paste is by tin copper composite powder 60-85%, tin alloy powder 3-12%, organic carrier 10-25%, functional additive 1-5% by mass percentage;Wherein the tin copper composite powder is the surface chemical tin copper powder of three-stage particle size gradient compounding, the tin alloy powder is the gradient melting point alloy powder that Sn58Bi, Sn3.5Ag, Sn0.7Cu are proportionally compounded.The application is synergistically designed by multistage particle size powder and gradient melting alloy, and dense metallurgical bonding conductive network can be formed at low temperature, and the core pain points of existing copper-based conductive paste, such as easy oxidation, high sintering temperature, insufficient conductivity, poor printing stability, are solved.The prepared paste has high conductivity, excellent oxidation resistance, low sintering temperature, good printing suitability and strong adhesion, and can be widely applied in integrated circuit packaging, flexible electronics, solar cells and other fields.

The invention relates to the technical field of ground maintenance, and discloses a stadium ground rapid repairing method, which comprises the steps of in-vivo damage diagnosis and microenvironment analysis, and obtaining a three-dimensional physical damage model and a surface chemical microenvironment model of a to-be-repaired area; dynamically generating a customized repair material formula based on the model; executing self-calibration droplet jetting and photopolymerization dynamics regulation and control repair; and carrying out in-situ multi-modal quality verification after repairing. Wherein in the repairing execution step, closed-loop self-calibration of material components is achieved through spectrum verification in the process, and photopolymerization dynamics is regulated and controlled in a self-adaptive mode according to a surface chemical microenvironment model so as to overcome the field inhibition effect. The invention also provides a system for executing the process. According to the invention, the dynamic adjustment of the repair strategy and the whole-process closed-loop quality control can be realized according to the specific condition of the damage point, and the reliability, consistency and efficiency of the repair are obviously improved.

According to the dynamic environment regulation and control detection device and method for the urban external nitrogen oxide absorption coating, the absorption effect of the coating on nitrogen oxide in the environment is systematically analyzed through multi-dimensional dynamic environment simulation and surface chemical in-situ analysis. According to the invention, a spectrum-pollutant-mechanical stress synergistic effect dynamic simulation system is constructed, and a spectrum-adjustable LED array, a NOx pulse injection module and a temperature and humidity-wind speed composite cavity are adopted, so that coupling simulation of dynamic adjustment of ultraviolet intensity, pollutant pulse input and rapid switching of temperature and humidity is realized; a surface adsorption state real-time monitoring technology is innovatively introduced, the characteristic peak intensity ratio of nitrate to nitrite is analyzed through a micro FTIR probe, and a coating layer micropore blockage early warning mechanism is established.

The present invention belongs to the field of degradation of aromatic hydrocarbon organic matter in saline-alkali environments, and relates to a preparation method and application of sulfide nano-zero-valent iron-doped biochar. The method includes the selection of a carbon-based material modifier, the preparation of a surface chemically modified carbon-based material, and the degradation process of a target pollutant. The preparation steps of the modified carbon-based material are as follows: first, (1) preparing biochar by carbonizing lotus leaf stems and facility agricultural crop straw at high temperature; (2) preparing sulfide nano-zero-valent iron particles by a modified borohydride reduction method under inert atmosphere conditions; and (3) preparing sulfide nano-zero-valent iron-doped biochar particles. The sulfide nano-zero-valent iron-doped biochar particles are subjected to solid-liquid separation, vacuum drying, and high-temperature calcination under a reducing atmosphere to obtain metal-modified biochar nanoparticles. The above-mentioned material is used to activate persulfate to degrade aromatic hydrocarbon organic matter, degrading the target PAHs to generate non-condensed ring organic small molecule compounds. The operation is simple, the strengthening effect is significant, the degradation effect is obvious, and the material is salt-alkali resistant.

The invention discloses nanometer graphene oxide and a preparation method thereof. The transverse size of the nanometer graphene oxide is 10-100 nm, and the thickness of the nanometer graphene oxide is 1-2.5 nm. The surface chemical structure meets the following conditions: a C1s peak is analyzed on the basis of X-ray photoelectron spectroscopy, the sum of the atomic percent content of hydroxyl and epoxy groups is not higher than 15%, and the atomic percent content of carboxyl is not lower than 6%. According to the structural design, the structural defect caused by excessive oxidation or reduction in a traditional method is avoided, and the chemical stability and the functionalization potential of the material are improved.

The invention discloses a laser crystal bonding method based on excimer laser surface activation, and belongs to the technical field of laser crystal surface modification and bonding. The activation method comprises the following steps: carrying out precise polishing and cleaning treatment on the surface of a laser crystal to be bonded; and carrying out irradiation activation treatment on the treated crystal surface by adopting excimer laser. The bonding method comprises the following steps of: activating the surfaces of the crystals by adopting the activating method, and laminating the surfaces of the two crystals subjected to activating treatment at room temperature to form an initial optical cement interface; and carrying out heat treatment annealing on the crystal assembly subjected to optical cement. High-energy ultraviolet photons of short-wavelength excimer laser are utilized to initiate surface chemical bond breakage, high-activity sites such as dangling bonds are formed, and the surface energy and the surface activity of the crystal are remarkably improved. The method does not need to introduce a chemical reagent, is small in heat influence, remarkably improves the bonding strength after activation, and is suitable for large-size crystal treatment.

The application discloses a preparation method of 3,4-dihydroxybenzaldehyde / gelatin carbon nano-material based adhesive hydrogel and belongs to the technical field of hydrogel. The application adopts 3,4-dihydroxybenzaldehyde and gelatin as carbon sources, the synthesized nano filler has amphiphilic surface characteristics, can promote the uniform dispersion of the nano filler in the hydrogel network, simultaneously utilizes the multivalent interface interaction to establish a mechanically solid and deformable nano composite structure, and the surface chemical properties of the 3,4-dihydroxybenzaldehyde / gelatin nano filler can not only relieve phase separation, but also promote synergistic energy dissipation through hydrogen bond reconstruction under stress. The design retains the inherent flexibility of the hydrogel, simultaneously greatly improves the electromechanical response capacity of the hydrogel, the obtained hydrogel material has the dual functions of structural support and active sensing medium, can be seamlessly integrated with biological tissues, and does not sacrifice the fidelity of the interface signal.

An electrochemical biosensor chip for the simultaneous quantitative detection of a plurality of different target molecules in a biological fluid, wherein the biosensor chip comprises: a) a substrate with a microfluidic structure designed to guide the biological fluid, b) a plurality of electrochemically isolated detection modules arranged along the microfluidic structure, c) wherein each detection module is structurally assigned to a specific target molecule and differs from the other detection modules by at least one irreversible structural feature selected from: -Electrode geometry, -Electrode surface, -Surface chemistry, - or a combination thereof, d) wherein each detection module comprises a working electrode, a counter electrode and a reference electrode, e) wherein each detection module is linked to a fixed electrochemical redox system which defines a module-specific electrochemical operating window, f) wherein the electrochemical operating windows of the detection modules do not overlap, (g) and wherein the biosensor chip comprises at least one non-functionalized internal reference electrode configured for hardware-based signal normalization, independent of the chemical identity of the target molecules.

The invention relates to a high-performance mixed matrix membrane (MMMs) based on a defect-engineered metal organic framework (MOF), which is used for efficient CO2 / N2 gas separation. The core innovation lies in that through a coordination strategy of ligand functionalization-defect engineering, a nitrogen-rich alkaline microenvironment is introduced into a PzDC ligand, so that the adsorption selectivity and solubility coefficient of the membrane to CO2 are greatly enhanced. By simply adjusting the addition amount (x value) of the monodentate ligand 2-PZC, the defect concentration, pore size distribution and surface chemical properties of MOF can be accurately regulated and controlled, an ultrafast transmission channel is provided for gas, and the diffusion coefficient and permeability are remarkably improved; meanwhile, a large number of unsaturated metal centers (Zr < 6 + >) with exposed defects and polymer chains form strong coordinate bonds, so that the problem of interfacial compatibility is fundamentally solved. Therefore, the'customizable 'design of the membrane separation performance is realized. Meanwhile, the structural stability and mechanical toughness of the membrane material in the long-term operation process are ensured through the strong interface interaction, and the good application prospect is achieved. According to the prepared MMMs, especially the PIM-1-based MMMs which takes UiO-PzDC-L3 as a filler and has the loading capacity of 15wt%, the breakthrough performance that the CO2 permeability reaches up to 18553Barrer (the CO2 permeability is improved by 384% compared with that of a pure PIM-1 membrane) and the CO2 / N2 selectivity reaches 23 is achieved, and the breakthrough performance far exceeds the Robeson tradeoff upper limit in 2019.

This invention discloses a method for preparing zinc-based N,P co-doped porous carbon materials and their applications, belonging to the field of porous carbon material preparation technology. This invention uses chitosan as a carbon and nitrogen source, and polymerizes it with zinc and phosphorus sources in acetic acid solvent to obtain a polymer precursor. The precursor is then treated by high-temperature calcination to obtain a porous carbon material doped with Zn, P, and N atoms. This porous carbon material uses P and N heteroatoms to anchor highly dispersed Zn metal ions, effectively controlling the surface chemical properties of the carbon material, while possessing a high specific surface area, abundant microporous-mesoporous structure, and stable metal active sites. This porous carbon material exhibits excellent adsorption performance when used for the adsorption and removal of SO2 from industrial flue gas.

The invention relates to the technical field of photocatalytic CO2 reduction, in particular to a La-Co3O4 photocatalyst and application of the La-Co3O4 photocatalyst in CO2 reduction reaction. When Co3O4 is used for photocatalysis of CO2 reduction reaction, the yield is low, and the selectivity on gas-phase products is poor. In order to solve the technical problems, the invention provides the La-Co3O4 photocatalyst, through rare earth metal La doping, the band gap structure and the surface chemical environment of cobaltosic oxide are optimized, the efficiency of photocatalytic CO2 reduction by La-Co3O4 is improved, the selectivity of the photocatalyst to CH4 in a gas-phase product is improved (up to 98% or above), and the photocatalytic performance of the photocatalyst is improved. The method disclosed by the invention is simple, controllable and suitable for large-scale production, and a new material and a new solution are provided for practical application of a photocatalytic CO2 reduction technology.

The invention relates to the technical field of thin film semiconductor material analysis, and particularly discloses a quasi-in-situ X-ray photoelectron spectroscopy analysis method for environmental failure of a thin film semiconductor material. The method comprises the following steps: performing a failure environment simulation test on a sample by using an XPS in-situ illumination system and / or an XPS quasi-in-situ high-temperature gas reaction system; analyzing real-time / quasi-real-time surface chemical information of the sample in the environmental failure simulation process by using a surface analysis technology, and obtaining change rules of surface components, chemical states, electronic structures and interface structures of the sample; based on analysis of change rules of surface components, chemical states, electronic structures and interface structures of the samples, the failure mechanism of the samples under the action of the failure environment is obtained. The method aims at solving the problem that a traditional failure analysis method cannot analyze change rules of surface components, chemical states, electronic structures and interface structures in the failure process, and then basic technical support is provided for sample failure mode and failure mechanism analysis and sample design improvement.

The invention belongs to the field of zinc battery materials, and particularly relates to a preparation method of a modified zinc metal electrode, a to-be-modified zinc metal negative electrode is placed in a polishing solution for surface modification treatment, and the modified zinc metal electrode is prepared; the polishing solution is a solution in which a compound shown as a formula 1 is dissolved. The invention also comprises the modified zinc metal electrode prepared by the preparation method as well as preparation and application of the modified zinc metal electrode. According to the invention, the zinc electrode is innovatively placed in the polishing solution containing the components in the formula 1 for surface chemical polishing and etching, so that the 002 crystal face can be accidentally and efficiently induced, the texture coefficient of 002 can be improved, moreover, the surface physical and chemical structure of the zinc electrode can be optimized, and the high-current cycle performance can be improved when the zinc electrode is used for assembling a zinc battery.

The application discloses a kind of anticorrosion weather-resistant double-coat powder coating for new energy storage cabinet and preparation method thereof, belong to powder coating processing technical field, for solving the technical problem that powder coating for new energy storage cabinet corrosion resistance in prior art is further improved in outdoor weather resistance and strong medium corrosion resistance.A kind of anticorrosion weather-resistant double-coat powder coating for new energy storage cabinet, including primer and surface coating, the primer includes the following composition by weight parts: epoxy polyester 70-80 parts, anticorrosive filler 28-32 parts, curing agent 3-5 parts and auxiliary additive 2-3 parts.The application is designed by resin molecular structure and inorganic filler surface chemical modification synergistic construction high density, high weather-resistant double-coat system, so that coating still maintains excellent adhesion, impact resistance and long-term corrosion resistance under ultraviolet, impact and strong acid and alkali environment.

The invention provides a particle size detection method of silica powder. The particle size detection method comprises the following steps: carrying out surface modification on the silica powder by adopting a silane coupling agent containing a polyethylene glycol chain segment, and carrying out particle size detection on the surface-modified silica powder. After the silane coupling agent containing the polyethylene glycol chain segment is adopted to perform surface modification on the silica powder, and a long-chain hydrophilic chain segment is chemically grafted on the surface of the silica powder, the silica powder obtains self-emulsifying dispersing capacity, and the dispersity and stability of the silica powder in dispersion liquid are greatly improved. Compared with an ultrasonic method, an external emulsification method and the like, the influence of external factors such as a sampling mode and an ultrasonic condition on the particle size detection result measured by the method is greatly reduced, and the test result is more accurate and stable.

The invention discloses a corrosion-resistant aluminum / diamond composite material which comprises an inner layer composed of aluminum or low-alloy aluminum and diamond, an outer layer composed of aluminum-zinc-magnesium alloy and diamond, an aluminum oxide ceramic film and a zinc-nickel alloy layer, in addition, the invention further discloses a preparation method of the composite material, and the preparation method comprises the steps that firstly, the surfaces of diamond particles are modified; 2, preparing a gradient structure blank; 3, micro-arc oxidation and hole sealing treatment; and 4, carrying out surface chemical plating. Through surface treatment cooperation and gradient structure design, the corrosion resistance and the heat-conducting property are synergistically improved, the heat conductivity is kept at 500 W / (mK) or above, and the corrosion resistance in a humid and high-temperature environment is remarkably improved; the method can be applied to high-heat-flux heat dissipation assemblies such as AI server chips / GPU water-cooling heat dissipation modules and super-computing liquid cooling system heat management materials, and particularly can be applied to electronic equipment in a high-corrosion environment.

The invention discloses an ultrathin electromagnetic shielding layer based on a magnetron sputtering technology and a preparation method thereof, and the method comprises the steps: carrying out the oxygen plasma etching of the surface of a flexible substrate through a reactive ion etching technology, the reactive ion etching power ranges from 100 W to 140 W, so that an activated substrate surface chemical group is formed on the surface of the flexible substrate; a seed layer is formed on the etched surface of the flexible substrate in a sputtering mode through the magnetron sputtering technology, the thickness of the seed layer ranges from 1 nm to 100 nm, and the roughness of the seed layer is 10 nm or below; forming a layer of shielding metal film on the surface of the seed layer through sputtering by using a magnetron sputtering technology, wherein the thickness of the shielding metal film is less than 1 [mu] m; wherein the sputtering temperature in the magnetron sputtering process ranges from 100 DEG C to 150 DEG C.

Systems and methods are provided for etching molybdenum in a wet ALE process. The methods disclosed herein use a wide variety of techniques and wet etch chemistries to oxidize a molybdenum surface and form a self-limiting, molybdenum oxide passivation layer in a surface modification step of the wet ALE process. For example, the methods use: (a) ultra-violet (UV) photolysis of peroxide oxidizers to create oxidizing radicals, which limit oxidation of the molybdenum surface and provide quasi-self-limiting oxidation behavior, (b) steric hinderance of oxidizers having large reactant molecules to achieve better self-limiting oxidation behavior, and / or (c) ligand-assisted oxidation to change the surface chemistry of the molybdenum oxide passivation layer and ensure self-limiting oxidation behavior. After forming the molybdenum oxide passivation layer using one or more of the oxidation techniques disclosed herein, the passivation layer is selectively removed in a dissolution step of the wet ALE process to etch the molybdenum surface.

The invention relates to the technical field of solid electrolyte, in particular to a surface modification method of LLZO solid electrolyte powder, which comprises the following steps: carrying out surface chemical analysis on original LLZO powder to obtain a lithium carbonate index for representing the surface impurity content of the LLZO powder; determining the qualification of the original powder based on the lithium carbonate index; qualified original powder and the modified precursor solution are mixed and react under preset conditions, a uniform gel coating layer is formed on the surface of the powder, and gel-coated intermediate powder is obtained; characterizing the gel coated intermediate powder to obtain a coating quality index, and judging the coating qualification based on the coating quality index; performing heat treatment on the qualified gel coated intermediate powder to obtain surface modified LLZO powder; and performing electrochemical performance test on the surface modified LLZO powder to obtain a performance evaluation index, and judging the qualification of surface modification. The electrochemical stability of the LLZO powder is improved.