1054 results about "Crystal structure" patented technology

The invention discloses a catalyst used for preparing acrylic acid and butyl ester by the dehydration of butyl lactate and a preparation method thereof. The catalyst is a composite catalyst, comprising a main catalyst A and auxiliary catalysts B, C, D and E, wherein, A is calcium sulphate, B is sulphuric acid, C is phosphate, D is alkaline matter and E is promoter. The preparation method comprises the steps as follows: five compositions A, B, C, D and E are sufficiently mixed, baked for 2-10 hours at the temperature of 200-800DEG C and formed for standby. The catalyst has high catalytic activation; under the catalysis of the catalyst, the molar yield reaches 75.1 percent and the molar selectivity of the acrylic acid and butyl ester reaches 71.5 percent. The preparation method has the advantages that the crystal structure of the main catalyst can be improved so as to be beneficial for carrying out the reaction; and the introduction of different auxiliary catalysts and quantities is helpful to improve the conversion ratio of the raw material and the product selectivity and is beneficial for improving the strength of the catalyst.

The invention discloses an application of a molybdenum disulfide-based piezoelectric catalytic material in a seawater uranium extraction material, and relates to the technical field of seawater uranium extraction, thiourea and sodium molybdate are used as precursors, and a MoS2 nanoflower with a specific 1T / 2H composite crystal structure is constructed through a hydrothermal synthesis technology. The method is placed in a uranyl nitrate solution, ultrasonic treatment is combined, efficient extraction of uranium can be achieved, and the method has potential application to extraction of uranium from seawater. The method is simple in process and environment-friendly, almost does not generate harmful waste in the synthesis process, does not need complex operation, and has good amplification preparation potential.

The invention relates to a design method of a novel crystal structure based on a large language model, and belongs to the crossing field of artificial intelligence and material science. According to the design method, design requirements are recognized through a large language model, a first crystal design constraint is extracted, then an example crystal structure is retrieved from a crystal structure database, a second crystal design constraint is output, and the large language model learns the example structure and generates a first target crystal structure according to the second crystal design constraint. The structure is determined as a second target crystal structure after being checked, then the second target crystal structure is subjected to structural relaxation to obtain a candidate structure set, and the novel crystal structure is obtained through stability screening. According to the design method, dependence on large-scale training can be effectively eliminated, novel crystal structure discovery without additional training is realized, adaptive conversion oriented to diversified novel crystal discovery scenes is realized, a design target is automatically analyzed according to different user intentions and crystal generation task types, and a generation strategy is flexibly adjusted.

The invention belongs to the technical field of lithium ion battery materials, and discloses a preparation method of a high-first-effect small-particle single-crystal ultrahigh-nickel ternary positive electrode material. The method comprises the following steps: firstly, uniformly mixing an ultrahigh nickel ternary precursor with a lithium source and a tungsten source, performing mechanical densification and pressing to obtain a blocky solid, and then performing four-section program temperature control calcination to obtain a target material. The interface fusion resistance of single crystal growth can be reduced through mechanical densification; a part of the tungsten element forms a Li2WO4 coating layer, and a part of the dopant phase replaces Ni < 2 + >, so that grain growth can be inhibited, a crystal structure can be stabilized, and the first effect is improved; and the microstructure of the material can be accurately regulated and controlled through four-section temperature-controlled calcination. Through a coating-doping-single crystallization synergistic strategy, the electrochemical performance of the material in liquid and sulfide-based all-solid-state batteries is remarkably improved, the process is controllable, and the application prospect is wide.

The invention belongs to the technical field of flame-retardant materials, and particularly relates to a prismatic aluminum hypophosphite compound as well as a preparation method and application thereof. The prismatic aluminum hypophosphite compound is prepared from aluminum hypophosphite, layered montmorillonite and nano silicon dioxide, and the weight percentage of the layered montmorillonite is 0.043 to 0.087 weight percent and the weight percentage of the nano silicon dioxide is 0.0036 to 0.0181 weight percent based on 100 weight percent of the aluminum hypophosphite; the particle size D10 of the prismatic aluminum hypophosphite compound is 1-3 microns, the particle size D50 of the prismatic aluminum hypophosphite compound is 5-8 microns, the particle size D90 of the prismatic aluminum hypophosphite compound is 10-15 microns, the particle size D97 of the prismatic aluminum hypophosphite compound is smaller than 20 microns, and the prismatic aluminum hypophosphite compound is of a single prismatic crystal structure or a regular structure in which a plurality of prismatic crystals are mutually embedded. The prismatic aluminum hypophosphite compound provided by the invention has a specific morphology and is especially suitable for a polyurethane flame-retardant system.

The invention relates to the technical field of acoustic functional devices, and discloses an acoustic black hole lens based on a three-dimensional radial gradient refractive index phonon crystal structure and a design method, a three-dimensional radial gradient refractive index distribution function n (r) with a center convergence characteristic is constructed, and incident sound waves are continuously guided and efficiently focused to the center of the lens in the propagation process; combining the feasibility constraint of an additive manufacturing process, designing a few-negative micro-lattice structure unit for realizing the gradient refractive index distribution, and determining key geometric parameters of the few-negative micro-lattice structure unit; according to the refractive index distribution function n (r), radially arranging the micro-lattice units in a three-dimensional space, and constructing an initial lens model; the sound field distribution, focusing performance and energy convergence efficiency of the model are verified and iteratively optimized in a mode of combining analytical modeling and finite element method simulation, and a three-dimensional radial gradient refractive index photonic crystal acoustic black hole lens design model with wide-angle incidence compatibility and broadband response capability is obtained.

The invention discloses a sodium ion sulfide solid electrolyte with enhanced stability, the chemical composition formula of the solid electrolyte is Na3Sb1-xAsxS4-ySey, x and y are respectively molar ratios of As and Se, x is more than or equal to 0.1 and less than or equal to 0.5, y is more than or equal to 0.1 and less than or equal to 0.4, the solid electrolyte has a cubic phase crystal structure similar to Na3SbS4 and belongs to a space group, the side length of a cell is a = b = c = 7.19309, and the volume of the cell is V = 374.9457336; in the crystal structure, Sb and As are mixed to occupy the peak and center equivalent position 2a of a cubic unit cell; s and Se are mixed to occupy a 24g position, Na ions are filled in gaps of unit cells, Na1 occupies a 6b position, Na2 occupies a 2b position, and a covalent bond network is formed by the position occupied by the mixture of S and Se and the position occupied by the mixture of Sb and As. The solid electrolyte is low in cost, the ionic conductivity of the solid electrolyte is 10 <-3 > S / cm magnitude, and the solid electrolyte has excellent cycle performance and air stability.

The invention relates to the technical field of hydrogen storage alloys, in particular to a Ti-based hydrogen storage alloy and a preparation method and application thereof. The chemical formula of the Ti-based hydrogen storage alloy is TibZr (1.02b) CrcMn (1.6 c) Fe 0.4, b is larger than or equal to 0.92 and smaller than or equal to 0.95, and c is larger than or equal to 1.0 and smaller than or equal to 1.2. According to the invention, Ti or Cr is doped into a Ti0. 92Zr0. 1Cr1. 0Mn0. 6Fe0. 4 alloy matrix, and regulation and control of unit cell parameters and electronegativity are realized by means of alloying, so that the hydrogen compression material has a higher compression ratio, and the alloy crystal structure is stable, and has more excellent activation performance, longer cycle life and higher cycle stability.

The invention relates to the technical field of photovoltaic solar cells, and discloses a perovskite thin film, a preparation method and application, the perovskite thin film is prepared from a perovskite precursor solution by adopting a one-step spin-coating method or a two-step deposition method, and the perovskite precursor solution comprises 2, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5- The perovskite material is prepared from 2, 4-oxazolidinedione, a raw material for synthesizing the perovskite material with the ABX3 crystal structure, and a solvent. According to the invention, 2, 4-oxazolidinedione (OD) molecules are simply introduced into a perovskite precursor solution, especially into an inorganic precursor solution (such as a lead iodide precursor solution), and the porous PbI2 can be obtained by utilizing the interaction between electron-donating groups in the OD molecules and lead iodide, so that when the organic ammonium salt is spin-coated in the second step, the porous PbI2 can be obtained. The organic ammonium salt solution can rapidly diffuse and fully react, so that the perovskite thin film with larger and more uniform crystal grains is obtained, and the residual amount of harmful PbI2 is remarkably reduced.

The present disclosure relates to materials science using processing of crystallographic structure data and artificial intelligence, and more particularly to methods and apparatuses for estimating material properties from crystallographic descriptive data, wherein a computer-implemented method includes generating first data representing a crystal structure from crystallographic descriptive data; generating, in view of structural periodicity, second data representing an expanded supercell; converting the second data into input data as a four-dimensional tensor in which a first dimension corresponds to atom species and remaining dimensions correspond to coordinates of a discretized three-dimensional grid; supplying the input data to a neural network including convolutional layers and a self-attention mechanism to extract features; and estimating, from the extracted features, at least one material property of the material. Related apparatuses and non-transitory computer-readable media are also disclosed.

The invention provides a reverse generation type design method and system of a battery material based on a large language model. The method comprises the following steps: carrying out serialized representation on a crystal structure of a lithium ion battery material; constructing a material basic model, and training the material basic model based on the serialized representation result to obtain a trained material basic model; a multi-dimensional attribute virtual KV attention mechanism is introduced into the material basic model, and a property conditional generation model is obtained; accessing a property prediction head network to the material basic model, and performing supervised training on the material basic model to obtain a material property prediction model; and performing reinforcement learning training on the property conditional generation model to obtain an optimized property conditional generation model, and generating a crystal structure candidate set based on the optimized property conditional generation model. By means of the method, efficient, controllable and diversified generation of the hundred-atomic-scale complex crystal structure is achieved, and the precision and practicability of material reverse design are remarkably improved.

The invention discloses a niobium-doped and carbon nanotube continuously coated lithium iron nickel phosphate material and a preparation method thereof, and belongs to the technical field of lithium ion battery positive electrode materials. The niobium source and the phosphorus source are added step by step, the concentration gradient distribution of the niobium element in the material is realized, and niobium is preferentially doped in the [100] crystal orientation through three-section temperature control sintering, so that the bulk phase conductivity and the lithium ion mobility are remarkably improved, and the capacity loss caused by excessive doping is avoided while the lattice structure is stabilized. In addition, the carbon nanotubes and the nitrogen-containing carbon source have a synergistic effect, Li-N-C covalent bonds are formed on the surface of the material, the interface stability is enhanced, the interface side reaction is effectively inhibited, and the surface conductivity is improved. According to the method, through double modification of doping and coating, the problems of low conductivity and poor cycling stability of the lithium iron nickel phosphate material are successfully solved, and the final product shows excellent rate capability and long cycle life.

The invention provides a lithium-rich disordered rock salt positive electrode material as well as a preparation method and application thereof. The chemical general formula of the lithium-rich disordered rock salt positive electrode material is Li (1 + x) MpNqO (2-y) Xy, 0.3 < = x < = 0.6, p + q = 1, 0.5 < = p < = 0.9, 0.1 < = q < = 0.5, 0 < = y < = 0.4, and M comprises Fe and / or Mn; n comprises any one or a combination of at least two of Zr, Ti, Nb, Mo, W or V; x comprises a polyanionic group. The N element with higher valence is introduced into the lithium-rich disordered rock salt positive electrode material, and meanwhile, the polyanion group is introduced to jointly stabilize the crystal structure, so that the oxygen loss under high voltage is effectively inhibited, and the N element with higher valence can also reduce cation mixing and participate and stabilize the anion redox reaction, so that the lithium-rich disordered rock salt positive electrode material is more stable. The polyanion groups and the transition metal ions form strong covalent bonds, so that the cycling stability of the material is remarkably improved.

The invention provides a method and a system for generating a multiphase powder X-ray diffraction crystal structure. The method comprises the following steps: acquiring a powder X-ray diffraction experiment spectrum; the powder X-ray diffraction experiment spectrum is input into a decoupling encoder, a plurality of crystal structure target potential factors output by the decoupling encoder are obtained, and the decoupling encoder is constructed based on independence loss among the crystal structure sample potential factors; and inputting the plurality of crystal structure target potential factors into a conditional diffusion model to obtain a target crystal structure corresponding to the powder X-ray diffraction experiment spectrum output by the conditional diffusion model, and the conditional diffusion model is obtained based on training of the crystal structure sample potential factors. According to the method, the crystal structure information can more purely and more accurately encode the core structure characteristics, and the success rate and the accuracy of analyzing the crystal structure from the complex atlas are remarkably improved, so that high precision and high robustness are obtained.

A method for producing calcium phosphate crystals according to the present invention comprises a step (S11) for preparing a weakly basic phosphoric acid solution containing a complex comprising a rare earth element ion and a coordination compound having a ligand coordinated to the rare earth element ion and a step (S12) for adding a calcium-containing compound to the weakly basic phosphoric acid solution and hydrolyzing. Some of the plurality of calcium ions contained in the structure of the calcium phosphate crystals are substituted by the rare earth element ion.

The invention relates to the technical field of functional polymer composite materials, in particular to an intermediate film for laminated glass based on color generation of a photonic crystal structure and a preparation method of the intermediate film. The intermediate film comprises a thermoplastic resin matrix and a three-dimensional photonic crystal structure region dispersed in the thermoplastic resin matrix, wherein the three-dimensional photonic crystal structure region is formed by self-assembly of monodisperse microspheres, and the central wavelength of a photonic forbidden band of the region is located in a visible light range. According to the invention, a three-dimensional photonic crystal structure is constructed in the intermediate film, and structural color generation is generated by utilizing selective reflection of the photonic band gap effect on visible light with a specific wavelength. According to the laminated glass, the color is generated by interference of light instead of absorption of chemical pigments, so that the color can be continuously and regularly changed along with the change of an observation angle or an incident light angle, the dynamic and changing visual aesthetic feeling is given to the laminated glass, and the higher requirements of the fields of modern buildings, automobiles and the like on dynamic aesthetics and personalized appearance are met.

An apparatus for implementing a microacoustic filter having an acoustically decoupled electrode structure is disclosed. In an example aspect, a device includes a microacoustic filter having a piezoelectric layer (126), a substrate (316), and an electrode structure (308-1, 308-2, 308-3, 308-4). The piezoelectric layer has a crystal structure for a lateral excitation plate mode. The electrode structure is positioned between the piezoelectric layer and the substrate and has a first surface (504-1) facing the piezoelectric layer. The microacoustic filter also includes at least one spacer (136-1, 136-2) extending from the substrate through a plane (508) defined by the first surface of the electrode structure and toward the piezoelectric layer to form a cavity (318) between the electrode structure and the piezoelectric layer.

The invention discloses an AlCrSiWN / CrMoN nano multilayer composite coating with high hardness and self-lubricating performance and a preparation process of the AlCrSiWN / CrMoN nano multilayer composite coating, and belongs to the technical field of coatings. The multi-layer composite coating is a modulation coating formed by AlCrSiWN high-hardness layers and CrMoN self-lubricating layers through alternate deposition, the total thickness of the multi-layer composite coating is 3-4 microns, and the periodic thickness of the multi-layer composite coating is 0.011-0.038 microns. The preparation process of the coating comprises the steps that an AlCrN transition layer of a columnar crystal structure is prepared firstly, then an AlCrSiW target and a CrMo target are started at the same time, the AlCrSiWN / CrMoN nano multilayer composite coating with the nanoscale modulation period and alternate hardness is prepared by regulating and controlling the rotating speed of a rotating frame in a vacuum coating cavity to be 0.6 r / min-1. 5 r / min, and the AlCrSiWN / CrMoN nano multilayer composite coating with the nanoscale modulation period can keep the high hardness of the coating through the soft and hard alternate multilayer structure, so that the hardness of the coating is greatly improved, and the coating has the good application prospect. The toughness and the self-lubricating performance of the coating are improved, and crack propagation is effectively inhibited.

The invention discloses a gel microneedle loaded with silver nanoparticles and a preparation method and application thereof.The extract nano-silver (AB-AgNPs) is prepared through a green synthesis strategy, a drug-loaded microneedle system is constructed based on carboxymethyl chitosan-vanillic aldehyde-polyvinyl alcohol (CMCS-Va-PVA) composite gel, the AB-AgNPs prepared through the technology are uniform in particle size and stable in dispersion, and the drug-loaded microneedle has the advantages that the drug-loaded microneedle is good in drug-loaded performance and good in drug-loaded performance; the crystal has a typical face-centered cubic crystal structure and metal state Ag0 characteristics; the gel microneedle has good mechanical strength and forming effect, the AB-AgNPs and the gel matrix are stably combined through hydrogen bonds, the chemical properties are kept unchanged, and the system has broad-spectrum efficient bacteriostatic activity and biocompatibility; an in-vitro experiment proves that the green synthesized gel microneedle loaded with the silver nanoparticles has a remarkable capability of promoting the healing of L929 cell tissues; a rat wound experiment proves that the gel microneedle can regulate and control an inflammatory factor network and promote cell migration and tissue regeneration, healing of common and infected wounds is remarkably accelerated, and the wound residue ratio in 9 days is as low as 2.7% and 10.9% respectively.

The invention relates to a text representation and structure descriptor fused gas adsorption performance prediction method, and belongs to the technical field of material informatics. The method comprises the following steps of: firstly, performing textual representation on each sequence, and mapping the sequence into continuous vectors and position codes which can be processed by a computer by adopting an embedded vector technology to form a textual initial sequence; obtaining a continuous multi-source descriptor on the basis of obtaining a geometric descriptor reflecting pore structure characteristics and a physical and chemical descriptor reflecting host-guest interaction characteristics between the metal organic framework and gas molecules from the crystal structure file; then, feature extraction is conducted on the textualized initial sequence and the continuous multi-source descriptor on the basis of a prediction model of a double-branch collaborative modeling strategy, and self-adaptive fusion is conducted in a high-level semantic space; and finally, inputting the fusion features into a detection head to predict the adsorption performance of the target gas. According to the method, high-precision, strong-generalization and low-calculation-cost prediction can be carried out on the gas adsorption performance, and the material screening and design efficiency is improved.

The invention discloses a Ni-W coating with a gradient structure on the surface of a pipe and a preparation method of the Ni-W coating, and belongs to the technical field of metal surface modification. According to the Ni-W coating with the gradient structure, the bottom layer is of a nanocrystalline crystalline structure, and the surface layer is of an amorphous structure; according to the gradient structure of the Ni-W coating, the tungsten content is gradually increased in the growth direction of the coating, and continuous gradient distribution is formed. In the plating process, the concentration of tungsten ions in the plating solution is controlled by regulating and controlling the current or the potential, the structure transformation of the Ni-W alloy plating layer from a nanocrystalline structure to an amorphous structure is achieved, the gradient Ni-W plating layer with the nanocrystalline crystalline structure at the bottom layer and the amorphous structure at the surface layer is obtained, the metal activity of carbon steel is enhanced, and the corrosion resistance of the Ni-W alloy plating layer is improved. And the plating layer gives consideration to the binding force, corrosion resistance and wear resistance. According to the method, the technical problems that the binding force between a carbon steel substrate and a plating layer interface is weak, and the Ni-W plating layer deposition speed is low due to the fact that the carbon steel metal activity is low are solved.

The invention discloses a double-ceramic-layer thermal barrier coating of a differentiated columnar crystal structure and a preparation method, and belongs to the technical field of thermal barrier coating corrosion and protection. The invention innovatively discovers and utilizes the double influence of the columnar crystal size on the performance of the coating; the YSZ layer adopts a fine grain structure of 1-1.5 microns, so that the bonding strength and thermal shock resistance of the coating can be obviously improved; and the modified gadolinium zirconate layer adopts a 2-3 [mu] m coarse grain structure, so that the heat conductivity can be reduced, the permeation path of CMAS along a grain boundary can be effectively inhibited, and meanwhile, the modified gadolinium zirconate layer reacts with CMAS to form a compact barrier layer to prevent further permeation of CMAS. Through accurate regulation and control of electron beam physical vapor deposition (EB-PVD) process parameters, differential control of the sizes of the two layers of ceramic columnar crystals is realized, and under the synergistic effect of the two columnar crystal structures with different sizes, the thermal cycle life and CMAS corrosion resistance of the whole coating system in an ultra-high-temperature environment are remarkably prolonged and improved.

The invention discloses a three-dimensional asymmetric photonic crystal laser and a preparation method thereof. An epitaxial structure of the three-dimensional asymmetric photonic crystal laser comprises an N-type electrode, an N-type InP substrate, an N-type Al < x > < 1 > In < 1-x > < 1 > As upper limiting layer, a quantum well active region, a P-type Al < y > < 1 > In < 1-y > < 1 > As electron barrier layer, a P-type Ga < z > < 1 > In < 1-z > < 1 > Asz < 2 > P < 1-z > 2 functional layer, a P-type Al < x > < 2 > In < 1-x > < 2 > As lower limiting layer, a P-type InP connecting layer, a bottom insulating layer and a P-type electrode, wherein a three-dimensional asymmetric photonic crystal is etched on the P-type GaInAsP functional layer, and a chiral characteristic is introduced by destroying the symmetry of the photonic crystal, so that the P-type GaInAsP functional layer vertically emits a single-mode light beam with left-handed or right-handed circular polarization. By designing an asymmetric photonic crystal structure, efficient output of circularly polarized light beams is achieved, polarization selectivity and light beam quality are remarkably improved, and the advantages of low divergence angle and high light beam stability are achieved.

This invention discloses a lyophilization process for disodium fospropofol for injection, comprising sequential pre-freezing, sublimation drying, and desorption drying, wherein the pre-freezing process employs an annealing process. The lyophilization process for disodium fospropofol of this invention effectively solves the problems of low lyophilization efficiency caused by surface concentration and uneven crystal structure during pre-freezing through the annealing step in the pre-freezing process. The resulting lyophilized product has a good appearance, good reconstitution properties, and stable quality.

Provided are: lithium-excess positive electrode active material particles having a stabilized crystal structure; and a secondary battery including the particles. These positive electrode active material particles comprise lithium, a transition metal M (M is one or more selected from Mn, Cr, Mo, Nb, V, Fe, Ni, Ti, and Ru), oxygen, magnesium, and fluorine, wherein: Li / M (atomic ratio) in the positive electrode active material particles is more than 1; the positive electrode active material particles each have a core, a barrier film outside the core, and a shell outside the barrier film; more magnesium and fluorine are detected in the shell than in the core; crystalline orientations of the core and the shell substantially coincide with each other; and the shell has a fluoride.

The invention relates to the technical field of air purification materials, and particularly discloses an amino acid grafted modified covalent organic framework composite material as well as a preparation method and application thereof. The composite material comprises a covalent organic framework matrix and amino acid grafted through covalent bonds, the covalent organic framework matrix has a porous crystal structure, and the amino acid is connected with the matrix through an amido bond or a carbon-nitrogen bond. The preparation method comprises the four main steps of covalent organic framework matrix synthesis, matrix activation, amino acid grafting and product purification. The composite material provided by the invention can be used for indoor air purification, formaldehyde removal of automotive trim and formaldehyde adsorption process in industrial waste gas treatment. The material has a high specific surface area and a rich porous structure, combines specific interaction of amino acid functional groups and formaldehyde molecules, and shows excellent formaldehyde adsorption capacity and selective adsorption performance. The preparation method disclosed by the invention is mild in process condition, and controllable adjustment of material performance is realized by accurately controlling grafting parameters.

The present invention relates to a sulfide-based solid electrolyte containing lithium (Li), phosphorus (P), sulfur (S), boron (B), and a plurality of halogen elements and having an argyrodite-type crystal structure, wherein the sulfide-based solid electrolyte satisfies formula 1. [Formula 1] 3.6 ≤ (CxB) / A ≤ 5.5 In formula 1, A is Dmax measured by a laser diffraction and particle size distribution measurement method, B is D50, and C is an elastic modulus measured using an atomic force microscope (AFM).

The present invention relates to a sulfide-based solid electrolyte, a method for preparing same, and an all-solid-state battery comprising same. The sulfide-based solid electrolyte includes a compound containing lithium (Li), phosphorus (P), sulfur (S), and chlorine (Cl) and having an argyrodite-based crystal structure, wherein at least a portion of the crystal structure is doped with aluminum (Al), a Group 14 element (α), and oxygen (O), and the ion conductivity retention rate after exposure to moisture at a dew point of -40°C for 8 hours is 50.0% or more.

The invention belongs to the technical field of photocatalysts, and particularly relates to a sulfur nickel selenide cocatalyst, a photocatalyst and a preparation method and application of the sulfur nickel selenide cocatalyst, and the preparation method of the sulfur nickel selenide cocatalyst comprises the steps that a soluble nickel source, a soluble sulfur source and a soluble selenium source are dispersed in an alcohol solvent to be mixed, a reaction is conducted for 10-20 h at the temperature of 160-200 DEG C, and the sulfur nickel selenide is obtained after washing and drying; the molar ratio of the soluble nickel source to the soluble sulfur source to the soluble selenium source is 1: (0.5-1.5): (0.5-1.5). In the cocatalyst, Se is introduced into a NiS2 structure, lattice spacing is increased, a replacement solid solution NiSexS2-x is formed, in the solid solution, Se atoms replace S atoms in an atomic level and enter NiS2 lattices instead of being simply attached to the surface of NiS2 or forming heterojunctions, a single-phase and uniform crystal structure is formed instead of physically mixed two phases, and the structure is stable.

A method for manufacturing a perovskite quantum dot composite material that easily forms core-shell particles through a one-stage synthesis step is provided, along with the perovskite quantum dot composite material and an ink containing the perovskite quantum dot composite material. This perovskite quantum dot composite material suppresses surface defects of the perovskite quantum dots by forming an ionic crystal layer comprising halides in the shell layer and exhibits a very high PLQY (Power Level Quality). The perovskite quantum dot composite material comprises core particles and a shell layer surrounding the core particles. The core particles are composed of metal halide perovskites, and the shell layer comprises an organic halide compound with an ionic crystal structure having the same halogen composition as the core particles. The PLQY is greater than 75%, and the change in emission wavelength is less than 5 nm over a period of 10,000 minutes at room temperature.