56 results about "Copper doping" patented technology

The invention provides the preparation method of the efficient photocatalyst which is simple and convenient, does not contain noble metals or toxic metals and does not need a cocatalyst. In the invention, a strategy for synergistically improving the catalytic performance by regulating and controlling sulfur vacancies and doping copper ions is provided, zinc indium sulfide (ZIS) is selected as a substrate material, the content of sulfur atoms is increased in the synthesis process through a solvothermal method to introduce the vacancies, and Cu (NO) is synchronously added to introduce Cu, so that the catalytic performance is improved. The Cin-VZIS catalyst is successfully prepared (n is a doping proportion relative to Zn). A TEOA aqueous solution is used as a sacrificial agent to carry out photocatalytic hydrogen production reaction, the synergistic effect of the two modification modes can significantly improve the performance of the catalyst, and when the copper doping ratio is 1.5%, the catalytic activity reaches the highest and is 1.799 mmol.g.h, which is 7.5 times of that of an original ZIS catalyst. The prepared catalyst is high in activity and good in stability, and a new way is provided for developing efficient and stable solar hydrogen production materials.

The invention discloses a high-conductivity phosphorus-copper alloy and a surface treatment process thereof, and relates to the technical field of copper alloy surface treatment.The surface treatment process comprises the specific steps that after the phosphorus-copper alloy is cleaned, sand blasting treatment is conducted, then a composite coating is coated, and pyrolysis annealing is conducted to obtain a middle layer; coating an epoxy composite coating on the surface of the middle layer, and curing at 40-45 DEG C for 20-24 hours to form a surface layer; wherein the composite coating is prepared from the following raw material components in parts by mass: 5 to 8 parts of phosphorus-copper doped molybdenum disulfide, 1 to 3 parts of copper powder, 0.2 to 3 parts of metal salt, 20 to 30 parts of aniline tripolymer derivative and 60 to 80 parts of N, N-dimethylformamide; the epoxy composite coating comprises the following raw material components in parts by mass: 80-100 parts of epoxy resin, 1-3 parts of modified MXene, 1-3 parts of phosphorus-copper doped molybdenum disulfide and 60-75 parts of a curing agent.

The invention belongs to the technical field of solar cells, and particularly relates to a preparation method and application of a copper-doped cadmium telluride thin-film solar cell. The preparation method of the copper-doped cadmium telluride thin-film solar cell comprises the following steps: preparing a transparent conductive layer, a window layer, an absorption layer and a back contact layer on a transparent substrate in sequence, then soaking the transparent substrate in a copper salt solution, then preparing a back electrode layer on the side of the back contact layer, and carrying out annealing treatment. According to the invention, copper doping is realized based on a soaking method, and hole transport efficiency can be improved, energy band matching can be optimized and interface recombination loss can be reduced by controlling the concentration, the type and the soaking time of the copper salt solution, so that the solar cell has good open-circuit voltage, short-circuit current and filling factors, relatively high conversion efficiency can be realized, and the conversion efficiency can reach 19.62%. Meanwhile, the preparation process is simple and can be completed in the atmospheric environment, and compared with a traditional process, the annealing temperature is low, so that the preparation cost is low.

The invention discloses a mixed valence copper doped bismuth vanadate nanodisk photocatalyst and a preparation method and application thereof, a main body of the catalyst is a bismuth vanadate nanodisk, copper is doped in the bismuth vanadate nanodisk, and the copper is composed of Cu < + > and Cu < 2 + >; the catalyst has the characteristics of high stability, simplicity in implementation, high universality and the like. The doped copper ions not only can improve the light absorption capacity of the bismuth vanadate material, but also can promote the rapid separation of photo-induced electrons and holes of the bismuth vanadate material by virtue of the mixed valence state of the copper ions, and improve the carrier dynamics on the material, so that the photocatalytic efficiency of the bismuth vanadate material is improved. The bismuth vanadate photocatalyst doped with the copper ions in the mixed valence state has an efficient photocatalytic degradation effect on pollutants such as rhodamine B and the like, and has a wide application prospect in the technical aspects of environmental pollutant degradation and green advanced oxidation.

The invention relates to the technical field of waste battery treatment, and particularly discloses a physical recovery method of a negative electrode material in a waste pole piece, and the method comprises the following steps: S1, heating pretreatment; s2, tearing the whole pole piece in a coarse crushing manner to preliminarily separate negative electrode powder, and then separating the negative electrode powder and copper foil powder in a fine crushing manner; s3, sorting: respectively collecting powder and copper foil; s4, adjusting particle size distribution of the particles in a processing mode, and repairing surface defects of the particles; and S5, performing micro-pressure calcination to realize Cu doping of the residual trace copper foil in the negative electrode material. A physical method is adopted for processing and treatment in the whole process, the recovery rate of the negative electrode material and the copper foil is larger than 98%, the content of doped copper accounts for 0.2%-0.5% of the mass of the negative electrode material, residual trace copper doping is achieved, the conductivity of the final negative electrode material can be improved by 22% or above, the first coulombic efficiency is higher than 92%, the recovery process is energy-saving, environment-friendly and convenient to operate, and the method is suitable for industrial production. And the method is suitable for recycling and processing most of the negative pole pieces of the CMC system.

The invention relates to the technical field of cadmium telluride power generation glass, in particular to a copper-doped back contact layer, a preparation method of the copper-doped back contact layer and cadmium telluride power generation glass. The preparation method of the copper-doped back contact layer comprises the following steps: firstly preparing the back contact layer, then preparing a copper paste dot matrix on the back contact layer, and finally carrying out two-stage heat treatment, the first-stage heat treatment temperature of the two-stage heat treatment is 180-220 DEG C, and the second-stage heat treatment temperature of the two-stage heat treatment is 250-300 DEG C. According to the preparation method, an intrinsic zinc telluride (i-ZnTe) buffer layer is introduced and combined with a dot-matrix copper doping technology, and a super-stable back contact structure which is gently transited in energy band, extremely low in interface recombination and strictly limited in Cu ions is constructed between the CdTe absorption layer and the metal back electrode, so that the cadmium telluride power generation glass which is higher in efficiency and longer in service life is prepared.

The invention provides a copper-doped cadmium zinc sulfide / chromium-doped bismuth vanadate hollow sphere composite photocatalyst, a preparation method thereof and application of the photocatalyst in hydrogen production by water decomposition. The material is prepared by the following method: (1) preparing copper-doped zinc cadmium sulfide nanoparticles by using a hydrothermal method; (2) preparing chromium-doped bismuth vanadate hollow spheres by using a hydrothermal method; and (3) modifying the copper-doped cadmium zinc sulfide on the surface of the chromium-doped bismuth vanadate hollow sphere to obtain the copper-doped cadmium zinc sulfide / chromium-doped bismuth vanadate hollow sphere composite photocatalyst. The copper-doped cadmium zinc sulfide / chromium-doped bismuth vanadate hollow sphere composite photocatalyst prepared by the invention is easy to synthesize, wide in raw material source and high in catalytic activity and stability, and in a photocatalytic hydrogen production test, the photocatalytic hydrogen production amount within 3 hours can reach 49.1 mmol.g <-1 >.

The invention belongs to the technical field of new energy materials, and relates to a preparation method for preparing a copper-doped carbon nanofiber coated cerium-doped manganous oxide composite material serving as a high-cycle-stability zinc positive electrode of an aqueous zinc ion battery by combining an electrostatic spinning method and high-temperature annealing.

Methods of fabricating nanocrystals are disclosed. Such methods may include providing copper sulfide core nanocrystals and providing a lead precursor. Moreover, the copper sulfide core nanocrystals may be reacted with the lead precursor to generate copper doped lead sulfide nanocrystals. Related nanocrystals and optoelectronic devices are also disclosed.

This invention provides a method for preparing a long-cycle-life composite sodium iron pyrophosphate cathode material, comprising: adding perfluorophthalocyanine copper during a co-precipitation reaction to prepare a copper-doped composite sodium iron pyrophosphate precursor; dispersing the copper-doped composite sodium iron pyrophosphate precursor in a perfluorophthalocyanine copper solution, performing solid-liquid separation, vacuum drying, and pre-calcining to obtain a primary doped precursor; mixing a sodium source, a carbon source, and the primary doped precursor, milling the resulting slurry, and then spray drying to obtain a doped and modified precursor; and sintering the doped and modified precursor to obtain the long-cycle-life composite sodium iron pyrophosphate cathode material. This invention achieves doping and interface modification through perfluorophthalocyanine copper, simultaneously realizing a carbon-coated stable structure to improve the electronic and ionic conductivity of the material, significantly enhancing specific capacity, rate performance, and cycle stability.

The present application belongs to the technical field of comprehensive recycling of non-ferrous smelting slag, and particularly relates to a method for simultaneously floating and separating and recycling elemental sulfur and zinc sulfide from high-sulfur slag, which specifically comprises the following steps: (1) adding copper sulfate to high-sulfur slag slurry for microwave treatment, then adding hydrogen peroxide for heating treatment, and standby; (2) obtaining sulfur concentrate by floating the high-sulfur slag slurry obtained in step (1), and separating elemental sulfur and zinc sulfide by extracting the sulfur concentrate; the method promotes copper doping on zinc sulfide particles by microwave, improves the floating capacity of zinc sulfide, simultaneously floats and recycles elemental sulfur and zinc sulfide by adding xanthate collector during floating, and finally separates elemental sulfur and zinc sulfide by extraction; the method realizes efficient and high-grade recovery of sulfur and zinc sulfide at the same time, and provides comprehensive utilization of resources.

The invention provides a solar cell based on a Cu-doped lead-copper alloy perovskite light absorption layer and a preparation method of the solar cell, and the light absorption layer of the solar cell is a Cu-doped lead-copper alloy perovskite thin film Cs0. 05MA 0. 10FA 0. 85Pb1-xCuxI3, the preparation method of the lead-copper alloy perovskite thin film comprises the following steps: adding formamidine hydriodate, methylamine hydriodate, cesium iodide, lead iodide and cuprous iodide powder into a solvent, and uniformly stirring and mixing to prepare a perovskite precursor solution; the PbI2 powder and the CuI powder are uniformly mixed, the uniformly mixed precursor solution is spin-coated, annealing is carried out on a heating stage, the thin film is obtained, the ratio of the PbI2 powder to the CuI powder is 1-x: x, and x is equal to 0-10%. The copper-doped lead-copper alloy perovskite with the three-dimensional octahedral structure synthesized by the method has structural and thermodynamic stability and is high in fluorescence performance and light absorption performance, and the crystallization quality of a thin film is remarkably improved; when the perovskite thin film is used as a light absorption layer of the cell, a perovskite solar cell with high photoelectric conversion efficiency can be prepared, and the perovskite solar cell has excellent ultraviolet resistance and high temperature resistance stability.

The invention discloses a p-type copper doped antimony bismuth tellurium thermoelectric material, a preparation method, a module and a system, and belongs to the technical field of thermoelectric materials. The chemical formula of the material is Bi < 0.5 > Sb < 1.5 > Te < 3 > Cu < x >, wherein x is equal to 0.0025. A trace amount of copper element is accurately doped into a Bi0. 5Sb1. 5Te3 matrix, so that the carrier concentration is remarkably improved, the bipolar effect is inhibited, and meanwhile, the lattice thermal conductivity is effectively reduced by utilizing point defects and the phonon scattering effect of second-phase CuTe, so that collaborative optimization of electrical and thermal properties is realized. The average dimensionless thermoelectric figure of merit (ZT) of the material in a temperature zone of 30-100 DEG C is up to 1.46, which is superior to that of the existing commercial material. The preparation method combines vacuum melting, ball milling and spark plasma sintering (SPS) processes, and is simple and convenient in process and high in repeatability. And further high-pressure torsion (HPT) post-treatment can further refine the grains and reduce the heat conductivity. The material is particularly suitable for an energy recovery and self-energized monitoring system of converter valve low-temperature waste heat.

The application discloses rhombic nanosheet-shaped copper-doped nickel-cobalt transition metal selenide and a preparation method and application thereof. The preparation method of the material is as follows: after a coordination agent, a surfactant, a nickel salt, a cobalt salt and a copper salt are mixed with a solvent, the mixture is placed in a microwave COD digester to perform a microwave-assisted solvothermal reaction, a copper-doped nickel-cobalt MOFs precursor is obtained; the copper-doped nickel-cobalt MOFs precursor and a selenite are respectively placed in the downstream and the upstream of a tube furnace, and a selenization reaction is performed under a protective atmosphere, and the rhombic nanosheet-shaped copper-doped nickel-cobalt transition metal selenide is obtained. The material has an ultrathin rhombic nanosheet-shaped structure, the surface of the material is rough, the particle size distribution of the material is uniform, and the material has excellent electrochemical performance; when the material is used as an electrode material of a supercapacitor, the capacitance performance can be greatly improved. The preparation process is simple, the conditions are mild, the time consumption is short, and the cost is low, and the preparation process meets the industrial production standards.

The present application relates to the technical field of silicon material preparation, and particularly relates to a method for preparing copper-doped porous silicon material from decomposed photovoltaic modules, which comprises the following steps: step 1: pyrolyzing decomposed photovoltaic modules to obtain battery pieces and copper cable products, crushing the battery pieces, and vacuum smelting the battery pieces with a certain proportion of copper cables to obtain copper-doped silicon ingots; step 2: reacting silicon copper composite powder obtained by crushing the silicon ingots with magnesium powder to synthesize magnesium silicide, and grinding the magnesium silicide sand to obtain sand-ground magnesium silicide powder; and step 3: performing dealloying reaction treatment on the sand-ground magnesium silicide powder. The present application uses battery pieces and copper cables in decomposed photovoltaic modules as raw materials, combines gas-phase dealloying, and uses acid pickling to prepare a porous structure silicon negative electrode material with excellent electrochemical performance. The present application does not involve a template, is simple and efficient to operate, has a short process cycle, uses inexpensive and widely-sourced raw materials, and is easy to mass-produce.

This invention discloses a copper-doped TiO2 electro-Fenton cathode with an amorphous / crystalline heterojunction, its preparation method, and its application. The amorphous / crystalline heterojunction is formed by in-situ growth of titanium dioxide nanosheets on the substrate electrode surface via hydrothermal method, followed by doping and annealing. The amorphous interface formed by this invention exhibits stronger interfacial stress, increases the number and stability of unsaturated copper sites, and enhances the catalytic activity of the electrode through the construction of the amorphous / crystalline heterojunction, thereby enabling the electro-Fenton reaction at the cathode to proceed continuously and efficiently over a wide pH range.

The invention belongs to the technical field of alloy surface modification, and particularly relates to an electrolyte and application thereof, a copper-doped micro-arc oxidation film and a preparation method of the copper-doped micro-arc oxidation film. The invention provides an electrolyte. The electrolyte comprises a composite copper source, a film-forming agent, a surfactant, a pH value regulator and water, the composite copper source comprises soluble copper salt and sodium copper chlorophyllin. The chlorophyll copper complex ions and the copper ions are used as composite copper sources in the electrolyte, and the copper-doped micro-arc oxidation film formed by performing micro-arc oxidation on the chlorophyll copper complex ions and the copper ions has relatively high copper doping amount, so that the corrosion resistance and the antifouling property of the oxidation film are improved. And meanwhile, the working window is expanded when the electrolyte is used for micro-arc oxidation, and industrial application is facilitated.

The invention relates to the technical field of positive electrode materials, in particular to a copper-doped carbon nanotube coated sodium vanadium phosphate positive electrode material and a preparation method thereof.The copper-doped carbon nanotube coated sodium vanadium phosphate positive electrode material comprises a sodium vanadium phosphate matrix and a copper-doped carbon nanotube layer coating the surface of the sodium vanadium phosphate matrix; the doping amount of copper in the copper-doped carbon nanotube layer is 1-5% of the mass of the carbon nanotube; the pipe diameter of the copper-doped carbon nanotube is 5 to 20 nm, and the length of the copper-doped carbon nanotube is 100 to 500 nm; the particle size of the sodium vanadium phosphate matrix is 0.5-2 [mu] m; the thickness of the copper-doped carbon nanotube layer is 10 to 50 nm; a large number of experimental studies show that the doping amount of copper in the copper-doped carbon nano tube is controlled to be 1-5% of the mass of the carbon nano tube, in this range, extra carriers can be introduced into crystal lattices of the carbon nano tube through the copper element, the intrinsic resistivity of the carbon nano tube is reduced, the electron conduction efficiency is improved, and it can be avoided that the copper is excessively agglomerated to form an insulating phase; when the copper doping amount is about 3%, the carrier concentration is optimal.

The invention relates to a method for colorimetrically identifying thiophanate-methyl based on copper-doped carbon quantum dots, which comprises the following steps: step 1, mixing and dissolving raw materials and carrying out hydrothermal reaction to obtain a copper ion-doped carbon quantum dot crude product; step 2, based on the copper ion doped carbon quantum dot crude product obtained in the step 1, performing dialysis purification, concentration preparation and characterization to obtain a 0.5 mg / mL copper doped carbon quantum dot solution meeting requirements; and step 3, based on the 0.5 mg / mL copper-doped carbon quantum dot solution prepared in the step 1 and the step 2, through mixed reaction, spectrum and color detection and interference verification, identification and stability verification of thiophanate-methyl are realized. The method has the beneficial effects that the operation is simple and rapid, the cost is low, the thiophanate-methyl can be visually identified and analyzed on site in real time, and the used copper-doped carbon quantum dot material has better high-concentration salt resistance than a nano gold colloid solution.

The invention provides a preparation method of a chargeable and dischargeable copper-plated titanium dioxide nanotube antifouling material. The preparation method comprises the following steps: preparing TNT by adopting an anodic oxidation method, activating the TNT by using a colloidal silver activating solution, and performing copper plating treatment on the TNT by adopting a method of reducing CuSO4 by using formaldehyde to obtain a copper-doped TNT nanotube. The material takes a titanium dioxide nanotube array as a substrate to load CuO or Cu2O, TNT-Cu is used for antifouling of phaeodactylum tricornutum for the first time, through the synergistic effect of a capacitance effect and controllable Cu < 2 + > slow release, the adhesion inhibition rate of the phaeodactylum tricornutum reaches 98.3 + / -0.87%, the death rate reaches 96.0 + / -2.0%, and efficient, lasting and environment-friendly antifouling of the phaeodactylum tricornutum is achieved.

The application discloses a kind of multi-level pore structure copper modified titanium dioxide photocatalyst and preparation method thereof, belong to photocatalytic hydrogen production material technical field.Copper-doped titanium-based MOF material is synthesized by diaminoterephthalic acid, tetrabutyl titanate and copper nitrate trihydrate through hydrothermal method, copper-doped titanium-based MOF is calcined by air and ammonia gas in two steps, and titanium dioxide composite material Cu-TiO2 / Cu with copper ion doping and copper element loading is obtained.The method is prepared by the method of calcining after synthesizing precursor, and the Cu-TiO2 / Cu with multi-level pore structure is prepared, which shows excellent water decomposition hydrogen production performance under ultraviolet light.The method is a scalable preparation method, which can be applied to the doping modification of other transition metal ions, and can fully expose noble metal sites to improve the catalytic performance and increase the atomic utilization rate.The method is simple, the reaction condition is mild, the cost is low, and has wide application prospect.

The application discloses a preparation method of copper-doped double-crosslinked asphalt-based porous carbon and a product thereof and application of the porous carbon to preparation of a silicon-carbon negative electrode material, and the preparation method of the porous carbon comprises the following steps: S1, dissolving cellulose in a copper ammonia solution to obtain a uniform solution, adding asphalt, and fully mixing and then drying through heating to obtain a copper ammonia cellulose@asphalt composite material; S2, pre-oxidizing and crosslinking the copper ammonia cellulose@asphalt composite material through heating, and then performing pre-carbonization treatment under a protective atmosphere to obtain carbonized material; and S3, performing activation treatment on the carbonized material to obtain the copper-doped double-crosslinked asphalt-based porous carbon. The asphalt-based porous carbon prepared by the method disclosed by the application has high conductivity and excellent mechanical properties, and the silicon-carbon negative electrode material prepared by taking the asphalt-based porous carbon as a substrate has excellent cycle stability and rate performance.

The invention belongs to the technical field of nano materials and electrochemistry, and particularly relates to a copper-doped pyrophosphoric acid ferric phosphate sodium carbon composite material and a preparation method thereof. The structural formula of the copper-doped pyrophosphoric acid ferric phosphate sodium carbon composite material is Na4Fe2.85Cux (PO4) 2P2O7 (at) C, x is larger than or equal to 0.03 and smaller than or equal to 0.07, the composite material belongs to an NASICON type material, the conductivity and sodium ion migration kinetics of the material are improved through a strategy of copper doping and iron defect construction, and the composite material shows excellent electrochemical performance when serving as a sodium ion battery positive electrode active material.

The application discloses a copper-doped bismuth-based material and a preparation method and application thereof. The method comprises the following steps: preparing a nanosheet-shaped copper-doped bismuth-based material through an electrochemical reduction method from a copper-doped bismuth-based organic layer. The copper-doped bismuth-based organic layer is prepared through a hydrothermal method. The copper-doped bismuth-based material is used as an electrocatalyst in the reduction of CO2 in an acidic system. The copper-doped bismuth-based material solves the problem of how to increase the electron-rich bismuth active site, and realizes the good efficiency of electrocatalytic CO2 reduction for formic acid in an acidic electrolyte.

This invention discloses a cadmium telluride thin-film solar cell based on a p-type copper oxide back contact layer and its fabrication method, belonging to the field of solar cell technology. The cadmium telluride thin-film solar cell comprises, from bottom to top, a transparent conductive oxide thin film layer, a high-resistivity buffer layer, an n-type cell window layer, a p-type cell absorber layer, a back contact layer, and a back electrode layer; the back contact layer is made of CuMO2 material; wherein M is one or more of Al, Ga, In, Sc, and Y. This invention uses a p-type copper oxide thin film as the back contact layer, which can reflect photogenerated electrons at the cadmium telluride back surface to the PN junction, greatly reducing electron recombination at the cadmium telluride back surface, improving hole transport capability, and avoiding complex copper doping post-processing, thereby improving the open-circuit voltage and conversion efficiency of the cell.

The invention relates to an ultrasonic response defect titanium oxide coating as well as a preparation method and application thereof. The ultrasonic response defect titanium oxide coating is an anoxic copper-doped titanium oxide coating positioned on the surface of the medical titanium substrate; wherein the oxygen-deficient copper-doped titanium oxide coating comprises a porous titanium oxide coating, copper ions and / or copper elementary substances uniformly distributed in the porous titanium oxide coating, and oxygen vacancies uniformly distributed in the porous titanium oxide coating. The titanium-based implant is subjected to surface modification, and transition metal ions and structural defects (such as Ti < 3 + > and oxygen vacancies) are introduced into the titanium oxide coating, so that the energy band structure of TiO2 can be adjusted, the sonodynamic treatment efficiency is improved, and the surface modified medical titanium metal material capable of resisting bacteria and promoting osteogenesis is obtained; the synchronous resistance to early-stage bacterial infection and the effective promotion of later-stage osseointegration are expected to be realized.

This invention discloses a high-conductivity phosphor bronze alloy and its surface treatment process, relating to the field of copper alloy surface treatment technology. The specific steps of the surface treatment process are as follows: after cleaning the phosphor bronze alloy, it is sandblasted, then coated with a composite coating, and pyrolytic annealed to obtain an intermediate layer; an epoxy composite coating is coated on the surface of the intermediate layer, and cured at 40-45℃ for 20-24 hours to form a surface layer; wherein the raw material components of the composite coating include, by mass, 5-8 parts of phosphor bronze doped with molybdenum disulfide, 1-3 parts of copper powder, 0.2-3 parts of metal salt, 20-30 parts of aniline trimer derivative and 60-80 parts of N,N-dimethylformamide; the raw material components of the epoxy composite coating include, by mass, 80-100 parts of epoxy resin, 1-3 parts of modified MXene, 1-3 parts of phosphor bronze doped with molybdenum disulfide and 60-75 parts of curing agent.

The invention provides a preparation method of a copper atom catalyst modified carbon felt electrode, the carbon felt electrode and an all-vanadium redox flow battery, and the method comprises the following steps: carrying out acid pretreatment on the surface of the carbon felt electrode, washing off impurities on the surface of the carbon felt, and introducing an oxygen-containing group; dipping the carbon felt electrode subjected to acid pretreatment in a copper-containing ZIF-8 aqueous solution, so that a copper-doped ZIF-8 nanosheet array grows on the surface of the carbon felt; and calcining the carbon felt on which the copper-doped ZIF-8 nanosheet array grows, and carrying out one-step carbonization to obtain the nitrogen-containing porous carbon-loaded copper single atom modified electrode. Therefore, nitrogen-doped porous carbon can be constructed on the surface of the carbon felt, copper single atoms are anchored, hydrophilic oxygen and nitrogen atoms and efficient catalytic sites are introduced, and the energy efficiency of the battery can be remarkably improved when the prepared high-performance electrode is applied to the all-vanadium redox flow battery.

The invention provides a copper-doped bismuth telluride topological insulator lithium-sulfur battery diaphragm material and a preparation method thereof. The chemical formula of the copper-doped bismuth telluride topological insulator lithium-sulfur battery diaphragm material is Bi (2-x) CuxTe3, wherein the doping amount x of Cu is less than 10%. The topological structure of the surface of Bi2Te3 is changed through Cu doping, the carrier concentration of the surface is improved, meanwhile, when the Bi2Te3 is used as a battery diaphragm material of a lithium-sulfur battery, Cu doping can cause crystal defects, so that more sites are exposed, and Cu and sulfur species can form Cu-S bonds, so that the capturing capability of bismuth telluride on polysulfide is remarkably enhanced, and the performance of the Bi2Te3 is improved. By introducing Cu, the catalytic activity of Bi2Te3 on polysulfide conversion is improved, and the ionic conductivity is improved, so that the charge-discharge performance of the lithium-sulfur battery is improved.