49results about How to "Expected to be mass-produced" patented technology

The invention discloses a preparation method of an oxidized Mxene / S compound applied to a lithium-sulphur battery cathode, relates to a preparation method of an S compound applied to the lithium-sulphur battery cathode, and aims to solve the technical problem of complex process of an existing Mxene / S compound preparation method. The preparation method disclosed by the invention comprises the following steps: 1, preparing Mxene powder; 2, oxidizing; 3, performing a water bath method. According to the preparation method, oxidized Mxene with high conductivity is taken as an S carrier, the preparation process is simple and safe, the production cost is low, large scale production is hopefully realized, and the oxidized Mxene / S compound as a lithium-sulphur battery cathode material has very highspecific capacity and cycling stability. The preparation method is applied to preparation of the lithium-sulphur battery cathode material.

The invention provides a method for preparing a mono-disperse molybdenum disulfide nano sheet, which is characterized in that a mixture of molybdenum oxide and sulfur is used as a raw material, and the mixture is activated through ball milling in protective atmosphere; and then the mixture is annealed at the constant temperature of between 400 and 700 DEG C to be fully vulcanized so as to obtain mono-disperse molybdenum disulfide nano sheet granules. A large amount of mono-disperse molybdenum disulfide nano material is prepared through the simple and effective chemical synthesis method; and the method is simple and quick, has low production cost, and provides possibility for the broad application of the material in the aspects of lubrication and catalysis.

The invention particularly relates to a titanium-containing organic framework material MIL-125 (Ti) moisture-sensitive sensor and a preparation method thereof. The preparation method comprises the following steps of: firstly, utilizing a silk screen print method to prepare an Au metal inter-digital electrode on a ceramic substrate; utilizing a hydrothermal method to prepare an MIL-125 (Ti) sensitive material; and utilizing a coating method to coat the sensitive material on the metal inter-digital electrode to prepare a moisture-sensitive element. The adopted testing humidity range is 33-100% of RH (Relative Humidity), the adopted testing voltage is 1 V and the frequency is 100 Hz. The MIL-125 (Ti) moisture-sensitive sensor prepared by the preparation method has the advantages of simple preparation process, small device volume, suitableness for large-batch production, higher sensitivity to humidity, smaller humidity hysteresis and faster responding time; and the moisture-sensitive sensor has the huge application value on the aspect of moisture-sensitive detection.

The invention relates to a method for preparing monodisperse silver-coated microspheres, and belongs to the fields of silver-coated microspheres, electronic connecting materials and the like. The method comprises the following steps of: preparing monodisperse melamine formaldehyde resin (MF) microspheres by using a dispersion polymerization method; roughing, sensitizing, activating and chemically plating a nickel metal and a silver metal by taking the microspheres as mother spheres so as to obtain the monodisperse silver-coated MF microspheres. The MF mother spheres have the advantages of simple and reliable preparation process, high efficiency, controllable grain size, good monodispersibility and the like. Because the MF microspheres contain active groups such as amino acid, hydroxyl and the like, the coat is complete and high in binding force, the grain size of the silver-coated microspheres can be controlled in a range of 1.0-3.9mu m, the dispersion coefficient epsilon is 0.045-0.067, the monodispersibility is high, the decomposition temperature is about 300DEG C, and the thermal stability is high; moreover, the preparation method is simple and high-efficiency, has the advantages of industrial production, and has good application prospect in the fields of electronic connecting materials such as anisotropic conductive adhesives and the like.

The invention belongs to the preparation field of inorganic material bismuth oxychloride heterojunction photocatalysts and particularly relates to a method for preparing a Bi2S3 / BiOCl heterojunction photocatalyst. The method comprises the following steps of: (1) dropwise adding diethyl sulfate water solution into triethylene tetramine water solution to carry out neutral reaction, stirring, and removing water out of the mixed liquid, so as to prepare triethylene tetramine diethyl sulfate type ionic liquid; (2) dissolving imidazole in water, then dropwise adding hydrochloric acid, and separating out imidazole chloride ion liquid; (3) dissolving bismuth nitrate in deionized water, additionally dissolving imidazole chloride in the deionized water, dropwise adding prepared imidazole chloride water solution into bismuth nitrate water solution, and separating to obtain BiOCl; and (4) preparing triethylene tetramine diethyl sulfate type ionic liquid water solution, and dissolving the BiOCl and thioacetamide into the water solution, so as to prepare Bi2S3 / BiOCl. The photocatalyst disclosed by the invention has good activity, low cost and high purity and can be produced in large scale.

Belonging to the field of super-amphiphobic materials, the invention discloses a water dispersible super-amphiphobic microsphere, a preparation method and application thereof. According to the invention, an epoxy resin layer A is introduced to a substrate microsphere surface, a lot of epoxy groups exist on the surface of the epoxy resin A, during adhering to the substrate microsphere surface, parts of epoxy groups undergo cross-linking to make a polymer anchored on the microsphere surface, then parts of the epoxy groups undergo ring-opening reaction to graft a hydrophilic compound B and a fluorine-containing compound C, thus obtaining the water dispersible super-amphiphobic microsphere. The super-hydrophobic microsphere is prepared into a paint to coat the substrate surface, epoxy groups that do not undergo reaction in the microsphere are subjected to cross-linking with the substrate under the action of a catalyst, thus obtaining a super-amphiphobic surface. The preparation method is simple and feasible. The prepared water dispersible super-amphiphobic microsphere has good water dispersibility, can avoid use of organic solvents harmful to the environment, can be combined with a variety of substrates firmly, and has universality. The obtained super-amphiphobic surface has very good scrub resistance and corrosion resistance.

The invention discloses an MXene two-dimensional material and a Cu / MXene catalyst, and preparation methods and application thereof. The preparation method of the MXene two-dimensional material comprises the following steps: subjecting a uniformly-mixed reaction system containing lithium fluoride, acid and an Mxene precursor to a reaction, oscillating a mixture of a reaction product and water by adopting a mechanical oscillation technology, and carrying out ultrasonic treatment to obtain the MXene two-dimensional material. The invention also discloses the preparation method of the Cu / MXene catalyst. The preparation method of the Cu / MXene catalyst comprises the following steps: carrying out a mixed reaction on a copper source and an MXene two-dimensional material solution, carrying out centrifugal treatment, and drying a solid obtained after centrifugation so as to obtain the Cu / MXene catalyst. The two-dimensional catalyst material of the Cu / MXene catalyst has the characteristics of highdispersity and accurate control of the site position of an active component, and has good application prospects in the fields of a Sonogashira coupling reaction, reduction of 4-NP and the like.

The invention discloses a preparation method of sea urchin-shaped cadmium sulfide nanospheres. The preparation method comprises the following steps of mixing a single-source precursor, an organic alcohol and distilled water into a mixed solution, carrying out microwave heating of the mixed solution at a temperature of 80-100 DEG C for 3-7min with continuous stirring along the same direction, then carrying out microwave heating at a temperature of 150-165DEG C for 4-10min, washing the reaction solution orderly by distilled water and anhydrous ethanol, and carrying out drying to obtain the sea urchin-shaped cadmium sulfide nanospheres. The sea urchin-shaped cadmium sulfide nanospheres prepared by an ordinary pressure microwave method have high photocatalytic activity, and performances superior to performances of commercial cadmium sulfide, wherein after xenon lamp irradiation for 20min, the sea urchin-shaped cadmium sulfide nanospheres have a rhodamine B degradation rate of 75% and commercial cadmium sulfide has a rhodamine B degradation rate of 15%, and after xenon lamp irradiation for 140min, the sea urchin-shaped cadmium sulfide nanospheres have a rhodamine B degradation rate more than 95% and commercial cadmium sulfide has a rhodamine B degradation rate of 50%. The preparation method has simple processes, adopts the cheap raw materials stored easily, has a short preparation period and high repeatability, and is suitable for large-scale production.

The invention discloses a formaldehyde gas sensor based on a CoFe<2>O<4> / Co<3>O<4> double-shell structure cubic material and a preparation method thereof, and belongs to the technical field of gas sensors. The sensor consists of an Al<2>O<3> substrate, a Pd metal interdigital electrode, and a CoFe<2>O<4> / Co<3>O<4> double-shell structure cubic material prepared on the Al<2>O<3> substrate having thePd metal interdigital electrode by using a coating technology. When CoFe<2>O<4> is modified to a Co<3>O<4> hollow structure cube, lattice defects can be caused due to lattice mismatch; and these lattice defects can generate an oxygen vacancy to improve a gas sensitive response of a gas sensitive material. The invention has simple process, is small in prepared sensor, is applied to large-scale production and has an important application value. The formaldehyde gas sensor has the characteristics of simple preparation method, low cost, fast response recovery rate and low detection lower limit, and is expected to be produced in a large scale.

The invention belongs to the technical field of synthesis of nano-optoelectronic material, relates to a preparation method for a copper indium diselenide (CuInSe2) nanometer material, and in particular relates to a method for synthesizing a copper indium diselenide nanosheet through an ion exchange method. The method comprises the following steps of: synthesizing an In2Se3 (DETA) 0.5 precursor in a reaction kettle by adopting indium bromide and sodium selenite as reactants, and diethylenetriamine, hydrazine hydrate and deionized water as solvents; and by adopting the precursor powder and copper salt as the reactants, and glycol as the solvent, carrying out solvent thermal reaction in the reaction kettle to obtain the copper indium diselenide (CuInSe2) nanometer material. The indium diselenide nanosheet prepared by the method provided by the invention is the mesoporous material of which the average length is 3 micrometers and the width is 1.5 micrometers; the mesoporous material is provided with a plurality of pores; each nanosheet contains three elements which are respectively copper, indium and diselenide; and each element is uniformly distributed in the whole nanosheet. The method has the advantages of high reaction reproducibility, mild reaction condition, simple preparation method, low cost, high controllability, high product crystallinity, high output and purity, and is green and environment-friendly, and is expected for being used for mass production.

The invention discloses a mesoporous silica / carbon-sulfur compound for lithium sulphur battery cathode and its preparation method, and relates to a nanometer composite material and its preparation method, aiming to solve the technical problem that metal oxide with weak conductivity in the existing method can improve the impedance of the whole electrode and accordingly is not good for the rapid charge and discharge. The mesoporous silica / carbon-sulfur compound for lithium sulphur battery cathode is prepared from mesoporous silica, elemental sulfur and carbon material. The method includes steps of preparing sulphur silicon oxide composite, and dispersing the sulphur silicon oxide composite in the water; after magnetically stirring and dispersing, adding to water solution of a carbon material with concentration of 1 mg / mL; continuing to stir for 12-48 hours; settling, centrifuging, washing and drying the solution to obtain the mesoporous silica / carbon-sulfur compound for lithium sulphur battery cathode. The power is discharged at 0.1C, the top discharge capacity is up to 1625 mAhg<-1>; after the circulation for 500 circles, the compound still can keep about 1000 mAhg <-1>.

The invention belongs to the field of preparation and research of an inorganic material, namely bismuth phosphate and in particular relates to a method for synthesizing spindly bismuth phosphate by adopting imidazole dihydric phosphate type ionic liquid. The method comprises the following steps: (1) preparing the imidazole dihydric phosphate type ionic liquid, namely dissolving N-methylimidazole in deionized water, dripping phosphoric acid, stirring, and removing water and unreacted raw materials in the mixed solution to obtain light yellow viscous liquid, namely the imidazole dihydric phosphate type ionic liquid; and (2) dissolving bismuth nitrate and the imidazole dihydric phosphate type ionic liquid in the deionized water, performing ultrasonic treatment, performing centrifugal separation and precipitation, washing, and drying to obtain the target product spindly bismuth phosphate. The method for preparing the spindly bismuth phosphate by adopting the imidazole dihydric phosphate type ionic liquid is simple and easy in operation and low in cost, and the prepared product is high in purity and is expected to be produced in batches.

The invention relates to the field of preparation methods of cadmium sulfide (CdS) as an inorganic material, in particular to a method for preparing pine-like cadmium sulfide, which comprises the following steps of: (1) dissolving ethylenediamine into deionized water, then adding fluoboric acid, steaming water in the mixed liquid to obtain an ethylenediamine type ionic liquid; (2) mixing the ethylenediamine type ionic liquid prepared in the step (1) with the deionized water, adding a sulfide and cadmium chloride dihydrate to form a transparent solution; and (3) heating in a high-pressure autoclave to react, and then separating to obtain the target product. The heating temperature in the step (3) is 180-200 DEG C; the volume ratio of the ethylenediamine type ionic liquid to the deionized water in the step (2) is 3:1; and the sulfide in the step (2) is sulfourea. In the invention, the pine-like cadmium sulfide is prepared with a hydrothermal synthesis method with simple and easy operation, low cost, high product purity and possibility for mass production.

The invention discloses neodymium-iron-boron alloy powder, a neodymium-iron-boron magnet material, a preparation method and application. Wherein the neodymium-iron-boron alloy powder comprises the following components in percentage by mass: 29.5-31.5 wt% of R, R is a rare earth element, and R at least comprises Nd; b: 0.85 to 0.92 wt% of B, 0.1 to 0.5 wt% of S, and 64 to 68 wt% of Fe; 0.2 to 0.6 weight percent of N; wherein N comprises one or more of Zr, Nb, Hf and Ti; wherein the mass ratio of N to S is (1-4.1): 1, and S is from elemental sulfur and / or sulfur oxide. The neodymium-iron-magnetmaterial obtained by adopting the neodymium-iron-boron alloy powder can still remarkably improve the coercive force and the residual magnetism of the magnet material under the condition that the use of heavy rare earth elements is reduced or even the heavy rare earth elements are not added.

The invention discloses a fluorine-containing nano-microsphere / fluorine-containing epoxy resin hybrid, a preparation method and application thereof. The preparation method comprises the steps of: dispersing the microspheres in a solvent B, conducting ultrasonic treatment for 0.5-2h, under a temperature of 80-120DEG C and stirring, adding epoxy resin and a catalyst D, then carrying out heat preservation reaction for 1-5h, removing the solvent B, and conducting vacuum drying, thus obtaining a microsphere and epoxy resin hybrid with an epoxy group grafted on the surface; dissolving the microsphere and epoxy resin hybrid with an epoxy group grafted on the surface in a solvent E, and performing ultrasonic treatment for 2-5h, then adding a fluorine-containing compound, a dispersive compound and a catalyst D1 to react for 1-5h, thus obtaining the fluorine-containing nano-microsphere / fluorine-containing epoxy resin hybrid. The epoxy group in the fluorine-containing nano-microsphere / fluorine-containing epoxy resin hybrid can realize firm combination between fluorine-containing microspheres and between the fluorine-containing microspheres and a base material through chemical bonds.

The invention discloses a preparation method of an amphiphilic fluorine-containing nanoparticle / fluorine-containing epoxy resin hybrid and an application thereof. The preparation method comprises the following steps: dispersing the nanoparticle in a solvent B; adding epoxy resin and a catalyst D; preserving heat and reacting; removing the solvent B; then vacuum drying to obtain a nanoparticle and epoxy resin hybrid grafted with epoxy groups on the surface; dissolving the obtained product in a solvent E; then, adding a hydrophilic compound and a catalyst D1; after reaction, adding a fluorine-containing compound to be reacted with a catalyst D2; after reaction, concentrating the solvent E; and finally, adding water to keep stirring to obtain the fluorine-containing nanoparticle / fluorine-containing epoxy resin hybrid. According to the epoxy groups in the amphiphilic fluorine-containing nanoparticle / fluorine-containing epoxy resin hybrid prepared by the invention, fluorine-containing nanoparticles as well as the fluorine-containing nanoparticles and a base material thereof can be firmly combined through chemical bonds. The method is feasible to almost base materials, so that the method is universal. The method provided by the invention is simple and feasible, and expected to realize production on a large scale.

The invention discloses a room-temperature electro-deposition preparation method of a copper foil with high crystal face preferred orientation. The method comprises the following steps of (1) dissolving copper sulfate pentahydrate with deionized water, and adding a small amount of concentrated sulfuric acid to prepare an electrolyte with the pH value of 0.9-1.1 and the copper sulfate content of 240-260 g / L; (2) applying pulse current for electro-deposition by serving a copper sheet as an anode and a titanium sheet as a cathode, wherein the electro-deposition parameter ranges are as follows: the deposition current density is 0.5 A / cm<2>, the deposition time is 50 ms, the deposition standing time is 0-500 ms, the oxidation current density is 0.05 A / cm<2>, the oxidation time is 20 ms, and the oxidation standing time is 20 ms; and (3) taking out the cathode, and alternately cleaning with dilute sulphuric acid and deionized water to obtain the copper foil with high crystal face preferred orientation. The method is rapid and easy to amplify, no additive is contained, and the prepared electrolytic copper foil has high copper (111) and copper (220) crystal face preferred orientation and has excellent electronic conductivity.

The invention discloses a method for solvothermal synthesis of cobalt-doped molybdenum disulfide (Co / MoS2) with a yolk-eggshell structure. The method comprises the following steps: adding an organic molybdenum source, an organic cobalt source and an organic sulfur source into a mixed solvent of ethanol and water or ethanol according to a Co / Mo molar ratio of 0.03 to 1 and an S / (Mo + Co) molar ratio of 10: 1 to 2: 1, carrying out heat preservation on the obtained solution or suspension at 120-200 DEG C for 4-48 hours, and carrying out Ostwald ripening to obtain the Co / MoS2 with the yolk-eggshell structure. The preparation process is simple to operate, the preparation time is short, a template agent and a reducing agent do not need to be additionally added, and large-scale production can be realized. The prepared Co / MoS2 with the eggshell-yolk structure can be applied to the fields of electrode materials, lubricating materials, catalysis and the like, and has a wide application prospect.

The invention relates to a method for preparing an ultra-small oxide and carbon compounded lithium battery negative electrode material by a microwave method. The invention belongs to the field of preparation of lithium ion battery negative electrode materials. The invention aims to solve the technical problems that the existing lithium ion battery is low in comprehensive performance such as capacity and conductivity, the preparation process is relatively complicated, and the cost is relatively high. The method comprises the following steps: 1, preparing a salt solution to enable metal ions to permeate into a metal-organic framework (MOF) material; separating the ion-permeated MOF material from the solution by suction filtration, and drying to obtain an ion-permeated MOF material; 2, mixing the ion-permeated MOF material and graphene, grinding, and then carrying out microwave short-time heating; and 3, washing and removing impurities from the product to obtain the ultra-small oxide and carbon compounded lithium battery negative electrode material. The nano-particle size of the product is 2-10nm, and the product can have high capacity under low oxide loading.

The invention relates to the technical field of batteries, in particular to a high-thermal-stability battery diaphragm as well as a preparation method and application thereof. The high-thermal-stability battery diaphragm comprises a diaphragm, and the diaphragm is provided with a silylene coating layer. The prepared diaphragm is high in thermal stability and good in safety, and the problem that the diaphragm is poor in thermal stability is solved. And heat preservation is carried out at 120 DEG C, the commercialized diaphragm is deformed and shrunk at high temperature, and the diaphragm with the modified thickness is still kept complete. According to the two-dimensional silylene nanosheet, the diaphragm is coated with a two-dimensional sheet structure, so that heat conduction is facilitated. Besides, the nanosheet structure can also alleviate the problem of increase of ion impedance caused by reduction of the porosity, because the nanosheet structure can provide an ion transmission channel, the ion transmission speed is greatly improved, and the influence of the coating on the porosity of the diaphragm is effectively solved. The preparation method of the diaphragm is simple and easy to implement, low in cost and hopeful for large-scale production.

The invention discloses NdFeB alloy powder, NdFeB magnet material, preparation method and application. Among them, the neodymium-iron-boron alloy powder, in terms of mass percentage, includes the following components: R: 29.5-31.5wt%, R is a rare earth element, and R includes at least Nd; B: 0.85-0.92wt%, S: 0.1~0.5wt%, Fe: 64~68wt%; N: 0.2~0.6wt%; N includes one or more of Zr, Nb, Hf and Ti; the mass ratio of N to S is (1~4.1) : 1, wherein S is derived from sulfur element and / or sulfur oxide. The neodymium-iron-boron magnet material obtained by using the NdFeB alloy powder can still significantly improve the coercive force and remanence of the magnet material under the condition that the use of heavy rare earth elements is reduced or even no heavy rare earth elements are added.

The invention discloses ionic gel based on multiple physical crosslinking effects, a preparation method and a strain sensor. The ionic gel shows good mechanical properties (the maximum tensile stress is 610KPa, and the strain is 1160%), and the required ionic conductivity (gt at room temperature; 0.12 mS / cm). The sensor can still keep a gel state in a wide temperature range (20-180 DEG C), is suitable for severe environments, and has long-term electrical signal stability. In addition, the strain sensor can be used for detecting movement of different parts of a human body, including bending of fingers, wrists and elbows and slight throat shaking in swallowing and sounding processes, and shows quick response, high sensitivity and good repeatability, which indicates that the ionic gel has the potential of application in flexible electronic equipment.

The invention discloses an MXene two-dimensional material, a Cu / MXene catalyst, a preparation method and application thereof. The preparation method of the MXene two-dimensional material comprises: reacting a uniformly mixed reaction system comprising lithium fluoride, an acid and a Mxene precursor, and adopting mechanical vibration technology to vibrate the mixture of the reaction product and water, and then ultrasonically treating the mixture to obtain MXene 2 dimensional material. The invention also discloses that the preparation method of the Cu / MXene catalyst comprises: mixing and reacting the copper source and the MXene two-dimensional material solution, followed by centrifugation, and drying the solid obtained by centrifugation to obtain the Cu / MXene catalyst. The two-dimensional catalyst material of the Cu / MXene catalyst of the present invention has the characteristics of high dispersion and precise control of the position of the active component site, and has broad application prospects in the fields of Sonogashira coupling reaction and reduction of 4‑NP.

The invention relates to the field of preparation methods of cadmium sulfide (CdS) as an inorganic material, in particular to a method for preparing pine-like cadmium sulfide, which comprises the following steps of: (1) dissolving ethylenediamine into deionized water, then adding fluoboric acid, steaming water in the mixed liquid to obtain an ethylenediamine type ionic liquid; (2) mixing the ethylenediamine type ionic liquid prepared in the step (1) with the deionized water, adding a sulfide and cadmium chloride dihydrate to form a transparent solution; and (3) heating in a high-pressure autoclave to react, and then separating to obtain the target product. The heating temperature in the step (3) is 180-200 DEG C; the volume ratio of the ethylenediamine type ionic liquid to the deionized water in the step (2) is 3:1; and the sulfide in the step (2) is sulfourea. In the invention, the pine-like cadmium sulfide is prepared with a hydrothermal synthesis method with simple and easy operation, low cost, high product purity and possibility for mass production.

The invention discloses a preparation method of sea urchin-shaped cadmium sulfide nanospheres. The preparation method comprises the following steps of mixing a single-source precursor, an organic alcohol and distilled water into a mixed solution, carrying out microwave heating of the mixed solution at a temperature of 80-100 DEG C for 3-7min with continuous stirring along the same direction, then carrying out microwave heating at a temperature of 150-165DEG C for 4-10min, washing the reaction solution orderly by distilled water and anhydrous ethanol, and carrying out drying to obtain the sea urchin-shaped cadmium sulfide nanospheres. The sea urchin-shaped cadmium sulfide nanospheres prepared by an ordinary pressure microwave method have high photocatalytic activity, and performances superior to performances of commercial cadmium sulfide, wherein after xenon lamp irradiation for 20min, the sea urchin-shaped cadmium sulfide nanospheres have a rhodamine B degradation rate of 75% and commercial cadmium sulfide has a rhodamine B degradation rate of 15%, and after xenon lamp irradiation for 140min, the sea urchin-shaped cadmium sulfide nanospheres have a rhodamine B degradation rate more than 95% and commercial cadmium sulfide has a rhodamine B degradation rate of 50%. The preparation method has simple processes, adopts the cheap raw materials stored easily, has a short preparation period and high repeatability, and is suitable for large-scale production.

The invention discloses a germanium-carbon nitrogen nano composite material and a preparation method thereof. Firstly, germanium oxide nano wires are evenly dispersed in liquid-state organic ester, pyrrole, polyvinyl acetate and oxidative metal chlorine salt are added, and full stirring is performed for reaction so as to generate a germanium oxide-carbon nitrogen composite precursor; secondly, calcination is performed at the temperature of 600-1000 DEG C in the reducing atmosphere to obtain the germanium-carbon nitrogen nano composite electrode material; germanium nano particles in the prepared germanium-carbon nitrogen nano composite electrode material are mutually separated at intervals of certain distances and are injected into carbon nitrogen nano tubes in a sectioned mode to form a legume structure. The composite material prepared by means of the preparation method can be applied to lithium ion batteries, pores among discontinuous germanium particles in the material effectively buffer volume change occurred in the germanium charge-discharge process, meanwhile coating of a carbon nitrogen layer facilitates decrease of contact resistance and formation of a stable solid electrolyte interface, the electronic electric conductivity and electrochemical stability of electrodes are improved, and excellent lithium storage performance is shown.

The invention belongs to the technical field of synthesis of nano-optoelectronic material, relates to a preparation method for a copper indium diselenide (CuInSe2) nanometer material, and in particular relates to a method for synthesizing a copper indium diselenide nanosheet through an ion exchange method. The method comprises the following steps of: synthesizing an In2Se3 (DETA) 0.5 precursor in a reaction kettle by adopting indium bromide and sodium selenite as reactants, and diethylenetriamine, hydrazine hydrate and deionized water as solvents; and by adopting the precursor powder and copper salt as the reactants, and glycol as the solvent, carrying out solvent thermal reaction in the reaction kettle to obtain the copper indium diselenide (CuInSe2) nanometer material. The indium diselenide nanosheet prepared by the method provided by the invention is the mesoporous material of which the average length is 3 micrometers and the width is 1.5 micrometers; the mesoporous material is provided with a plurality of pores; each nanosheet contains three elements which are respectively copper, indium and diselenide; and each element is uniformly distributed in the whole nanosheet. The method has the advantages of high reaction reproducibility, mild reaction condition, simple preparation method, low cost, high controllability, high product crystallinity, high output and purity, and is green and environment-friendly, and is expected for being used for mass production.

A method for preparing an ordered mesoporous metal oxide@carbon lithium-ion battery negative electrode material belongs to the field of preparation of lithium-ion battery negative electrode materials. The present invention will solve existing SnO 2 The cycle stability and rate performance of base anode materials are poor. The method of the present invention: 1. using ferric oleate as a raw material, through temperature-programmed treatment, to obtain monodispersed oleic acid-coated iron ferric oxide nanoparticles; 2. then dissolving in an organic solvent, and standing at room temperature after ultrasound Obtain self-assembled NPs; 3. Dissolve the tin source in ethanol, slowly drop into the assembled NPs, and mechanically stir; 4. Wash with alcohol, dry, calcinate in an inert atmosphere, grind, etch, wash with water, and dry . SnO of the present invention 2 The @C anode material exhibits good cycle stability and rate performance; it can reach 730mAh g at 0.2C for 180 cycles –1 The capacity; when it returns to 0.2C after a large current cycle, the capacity still has no attenuation.