32 results about "Electron exchange" patented technology

The invention discloses a compost maturity testing method and a compost maturity testing device. The compost maturity testing method provided by the invention comprises the following steps: acquiring the electron exchange capability of a first compost sample; inputting the electron exchange capability into a seed germination index prediction model to obtain a seed germination index output by the seed germination index prediction model; the seed germination index prediction model is obtained based on sample data training, and the sample data comprises historical electron exchange capability of a second compost sample and corresponding compost time thereof, and historical seed germination indexes of the second compost sample and corresponding compost time thereof; and evaluating the compost maturity based on the seed germination index. According to the method, the seed germination index prediction model is established, and the seed germination index can be calculated only by measuring the electron exchange capacity of the sample in the actual testing process, so that the composting process can be rapidly measured on site, and the compost maturity can be accurately evaluated.

The invention provides a method for determining preparation parameters of biochar with high electron exchange capacity based on machine learning, and is suitable for the field of biomass energy and environmental engineering. The method comprises the following steps: collecting biomass raw material composition, carbonization conditions, biochar physicochemical structure parameters and electron exchange capability data, and preprocessing; a two-stage series model is constructed and optimized, and the electronic exchange capacity of the biochar is predicted; and determining an optimal raw material ratio and carbonization process parameters for maximizing the electronic exchange capacity of the biochar through a reverse optimization method. According to the method, the double-layer mapping relation between the electron exchange capacity of the biochar and the raw material ratio and carbonization process parameters is established, so that the model accuracy is effectively improved. According to the raw material ratio and carbonization process parameters of the method, the biochar with high electron exchange capability can be efficiently prepared.

The utility model provides a carbon black iodine absorption value measuring device which comprises a rotating wheel disc, a magnetic stirrer, a transmission filtering device and a reaction tank, a plurality of sample cups can be placed on the rotating wheel disc, after a mixed liquid sample is stirred by the magnetic stirrer, an iodine solution and a sodium thiosulfate solution are extracted by a plunger pump, and the iodine absorption value of the carbon black is measured. In the extraction process, carbon black in the iodine solution is filtered through the filter pipe, filtrate is added into the reaction tank and chemically reacts with the sodium thiosulfate, and the iodine ion electrode in the reaction tank can judge the end point of the reaction by detecting the electron exchange capacity of the iodine solution and the sodium thiosulfate in the reaction tank when the iodine solution and the sodium thiosulfate are subjected to oxidation-reduction reaction. And meanwhile, the measured current data is transmitted to a microcomputer for automatic processing, so that accurate carbon black iodine absorption value data is obtained. The problems that manual operation is low in efficiency and the precision is greatly influenced by human factors are solved, and the advantages of high efficiency and high precision are achieved.

The invention discloses a gram-positive bacterium extracellular electron transport chain construction method and a synthetic microbial agent. It is found that after a lipophilic material is added into an iron reduction system, the iron reduction speed and the iron reduction amount of gram-positive bacteria with weak electron transfer capacity are remarkably increased, and the iron reduction amount of the gram-positive bacteria can be consistent with the iron reduction magnitude of gram-negative strong iron reduction bacteria. The lipophilic degree and the iron reduction rate are subjected to correlation analysis and show significant positive correlation, which reveals that the lipophilic degree and the permeable membrane capacity of the material are key parameters for determining the iron reduction capacity of gram-positive bacteria. The lipophilic material not only can smoothly penetrate through the cell wall of gram-positive bacteria, but also can be enriched on a cell membrane in quantity, and gradually permeates into a cytoplasm matrix to generate electron exchange with NADH (Nicotinamide Adenine Dinucleotide Hormone) so as to construct a gram-positive bacteria extracellular electron transport chain. The invention provides a brand-new strategy for preparing the biological geological catalytic synthetic microbial inoculum for soil iron reduction.

This item is an electrochemical cell. An electrochemical cell is an item that generates electrical energy through a chemical reaction, or conversely, uses electrical energy to cause a chemical reaction. Specifically, it consists of at least two electrodes and an electrolyte, and utilizes an oxidation-reduction reaction that involves the exchange of electrons between the electrodes. Examples of electrochemical cells include batteries and electrolytic cells.

The invention discloses a modification method of an yttrium and magnesium ion co-doped lithium vanadium phosphate positive electrode material, and relates to the technical field of lithium ion battery positive electrode materials. The invention aims to solve the problem of how to effectively improve the rate capability of the lithium vanadium phosphate material. The invention provides a method for modifying a lithium vanadium phosphate positive electrode material. The lithium vanadium phosphate positive electrode material is co-doped with metal elements yttrium and magnesium. The doping of metal elements yttrium and magnesium effectively improves the electronic conductivity, realizes rapid electron conduction among particles, is beneficial to ion / electron exchange of active substances, greatly improves the performance and cycle performance of the positive electrode under high rate, and has the advantages of simple preparation, easy control, short synthesis period and good application prospect. According to the modification method, the yttrium and magnesium ion co-doped lithium vanadium phosphate positive electrode material can be obtained.

The application discloses an interface regulation method of graphene copper composite material, relates to the technical field of metal matrix composite material preparation, and aims to solve the problem of weak electron exchange between graphene and copper. The method comprises the following steps: S1, raw material selection; selecting a commercially available Gr / Cu / Gr foil as a substrate and selecting high-purity metal particles as an evaporation target; S2, metal deposition; depositing a heterogeneous metal layer with different thicknesses on both sides of the substrate by using a vacuum thermal evaporation film coating process, so that the substrate is wrapped by the heterogeneous metal layer; S3, metal deposition pretreatment; performing heat annealing treatment on the substrate obtained in the step S2, so that a heterogeneous metal coating with high crystallinity is obtained; S4, stacking a plurality of the substrates treated in the step S3, so as to construct an interface structure conducive to electric conduction; and finally, the graphene copper block material with high conductivity is prepared by using a vacuum hot pressing forming process.

This invention discloses a method for monitoring liquid-gas conversion using artificial intelligence in nanofabrication. The liquid-gas converter comprises a cathode electron exchanger and an anode electron exchanger placed vertically, separated from left to right into a cathode gas chamber, a liquid flow controller within the liquid conversion chamber, and an anode gas chamber. The electron exchanger faces the central liquid conversion chamber and directly contacts the liquid flow controller. The other side of the electron exchanger faces the open gas chamber. By applying voltage to the anode and cathode electron exchangers, the liquid-to-gas conversion is transformed into gas. The liquid flow controller has numerous puncture channels on its surface, the dimensions of which are designed using critical surface area and surface adsorption force calculations. These puncture channels are patterned and manufactured using precision processes. The converter is equipped with an intelligent microprocessor and multiple sensors. A liquid-to-gas flow guide valve is placed on top of the liquid flow controller. Under the control of the intelligent microprocessor, the liquid-to-gas flow is guided from the reservoir to the liquid flow controller. The microprocessor handles the liquid flow guide valve and artificial intelligence machine learning calculations, which are also transmitted to a cloud computing server for further calculations.

This invention discloses a conductive filter material and its preparation method. The conductive filter material includes a carrier, the surface of which has a conductive layer formed by conductive particles. In this invention, the conductive filter material can directly utilize its inherent properties to provide an environment conducive to electron donor and acceptor exchange by bacteria, allowing reducing and oxidizing substances to exchange electrons. This enables substances requiring electron exchange energy to undergo continuous biochemical reactions under the action of bacteria, thereby avoiding secondary chemical pollution from oxides or reducing agents required for biochemical treatment and reducing pollutant treatment costs. The conductive filter material of this invention can be applied to biochemical treatment in various scenarios, with a wide range of applications. In this invention, cable bacteria can be used as the main bacteria in the biochemical reaction. Due to the conductivity of the conductive filter material surface, cable bacteria can be cultured, multiplied, and attached to the conductive filter material surface in large quantities, increasing the number of cable bacteria and thus improving biochemical efficiency.

The invention relates to the technical field of catalyst preparation, and discloses a polyphthalocyanine / metal oxide composite catalyst as well as a preparation method and application thereof. The composite catalyst comprises a carbon carrier and metal polyphthalocyanine loaded on the carbon carrier; wherein the carbon carrier is a carbon material modified by metal oxide nanoparticles. The polyphthalocyanine / metal oxide composite catalyst provided by the invention can form a double-electron exchange channel, can effectively stabilize a metal active site in the center of polyphthalocyanine through electron transfer, remarkably inhibits dissolution and inactivation of the polyphthalocyanine in a severe environment, and has high catalytic activity and high stability.

The invention provides a polymeric monomer for coating a positive electrode material in situ and a preparation method and application thereof, and the polymeric monomer has a structure shown as a compound A. In the compound A, R1 is C1-C3 alkyl, n is polymerization degree, and n is 6000-10000. According to the method, a dense coating layer is realized through polymerization in-situ coating of the sodium electrode layer oxygen positive electrode material, the loss of active sodium caused by erosion of air to an active material is avoided, and the air stability is improved. The double functions of ion conduction and electron conduction are realized by utilizing the electron conduction characteristic of the polymerized monomer pyrrole structure and active sodium ions in sodium sulfonate, so that the composite sodium ion positive electrode material obtained after coating has relatively high ion conduction capability and relatively good electron conduction capability; ion transmission and electron exchange of the intermediate oxygen positive electrode material in the charging and discharging process are met. Meanwhile, the active sodium ions in the sodium sulfonate can also supplement the active sodium ions of the positive electrode in the circulating process.

Disclosed in the present invention are an off-site electro-catalytic reaction method and reaction system. The off-site electro-catalytic reaction method comprises: in a battery system, ion pairs in an electrolyte undergoing an electron exchange reaction with an electrode, so as to obtain an oxidation potential or a reduction potential; the electrolyte with the obtained oxidation potential or reduction potential entering an independent reaction system outside the battery system, and undergoing a redox reaction with a reactant in the reaction system, so as to obtain a mixture containing a reaction product; and after separation, the electrolyte, which has undergone the redox reaction, returning to the battery system, so as to obtain the oxidation potential or reduction potential again. By means of the new off-site electro-catalytic tandem reaction technique provided in the present invention, a complex reaction involving gas, liquid and solid phases, etc. can be moved out of the surface of an electrode, and a reaction process is performed outside of a battery, thereby preventing the contamination of the electrode, a catalyst, a separator, etc. by reactants and / or products; and the reaction system built by means of an off-site electro-catalytic synthesis technique operates stably, can be used for fundamental theoretical research, and has practical application significance.

Methods are provided that allow global access to redox-based molecular information by coupling electrochemical measurements with signal processing approaches. More specifically, the disclosure provides methods that rely on the use of redox probes to assay samples for redox activities that act to exchange electrons with the probe thereby generating detectable optical and electrochemical signature signals that can then be assigned to a sample feature of interest. In particular embodiments, the disclosed assay methods are useful for diagnosis and prognosis of disorders, such as schizophrenia, that are found to be associated with a specific redox-based signature within a subject sample.

Electron exchangers are placed in the conversion cell and divide it into cathode gas chamber, liquid conversion solution chamber filled with a liquid flow controller, and anode gas chamber. Voltage is applied to the electron exchangers to convert the liquid conversion solution to gases, releasing to the gas chambers. Under recycled gas pressure, liquid conversion solution with unwanted solutes is fed through a solute diminish device and a solute diminish layer at the liquid flow controller. Unwanted solutes are blocked by the solute diminish device and the solute diminish layer. Tracks and puncture channels on the liquid flow controller are designed by critical surface calculations and manufactured with a precision technology. A computing engine connected to the cloud carries out artificial intelligence calculations, and controls valves, sensors, cameras, and gas flow devices. In producing the final gases, our method is energy efficient.

The application discloses a kind of off-site electrocatalytic reaction method and reaction system.The off-site electrocatalytic reaction method includes: electrolyte ion pair in battery system carries out electron exchange reaction with electrode, obtains oxidation potential or reduction potential;Obtain the electrolyte of oxidation potential or reduction potential enters the independent reaction system outside battery system, and carries out oxidation-reduction reaction with reactant in reaction system to obtain mixture containing reaction product;After separation, after oxidation-reduction reaction, electrolyte returns to the battery system again to obtain oxidation potential or reduction potential.The novel off-site electrocatalytic tandem reaction technology provided by the application can move the complex reaction involving gas, liquid, solid and other phases out of the electrode surface, and place the reaction process outside the battery, avoiding the contamination of reactants and / or products on the electrode, catalyst, separator, etc.;The reaction system built by the off-site electrocatalytic synthesis technology runs stably, can be used for basic theory research, and has practical application significance.

Electron exchangers are placed in the conversion cell and divide it into cathode gas chamber, liquid conversion solution chamber together with a liquid flow distributor, and anode gas chamber. Voltage is applied to the electron exchangers to convert the liquid conversion solution to gases, and gases are released directly to the gas chambers. There are many puncture channels on the surfaces of the liquid flow distributor, and they are designed by critical surface calculations. The puncture channels have special designed patterns and are manufactured with a precision technology. A microprocessor connected to the cloud is responsible for artificial intelligence calculations, and it controls liquid and gas flow valves in the conversion cell. In producing the same amount of final gases, our method is energy efficient.

The invention discloses a preparation method of a Nia / Cobat Ti3C2Tx bimetal fused salt etched composite electrode material and application of the Nia / Cobat Ti3C2Tx bimetal fused salt etched composite electrode material to removal of fluorine ions in a water body, and belongs to the technical field of water treatment. In the preparation process of the MXene, a relatively safer, green and environment-friendly Lewis acid molten salt etching method is selected, and negative groups brought to the MXene by traditional fluorine-containing reagent etching are reduced. Meanwhile, due to the interaction of metal and the carrier, a large number of uniformly loaded Ni / Co metal nanoparticles or metal alloys are obtained on the surface of the prepared material, the interlamellar spacing of the MXene material is remarkably increased, more active sites are exposed, the ion and electron exchange capacity of the material is greatly improved, and the material shows excellent electrochemical performance; and the material is applied to a capacitive deionization technology, so that the capacitive deionization capability is effectively improved.

Disclosed in the present invention are an off-site electro-catalytic reaction method and reaction system. The off-site electro-catalytic reaction method comprises: in a battery system, ion pairs in an electrolyte undergoing an electron exchange reaction with an electrode, so as to obtain an oxidation potential or a reduction potential; the electrolyte with the obtained oxidation potential or reduction potential entering an independent reaction system outside the battery system, and undergoing a redox reaction with a reactant in the reaction system, so as to obtain a mixture containing a reaction product; and after separation, the electrolyte, which has undergone the redox reaction, returning to the battery system, so as to obtain the oxidation potential or reduction potential again. By means of the new off-site electro-catalytic tandem reaction technique provided in the present invention, a complex reaction involving gas, liquid and solid phases, etc. can be moved out of the surface of an electrode, and a reaction process is performed outside of a battery, thereby preventing the contamination of the electrode, a catalyst, a separator, etc. by reactants and / or products; and the reaction system built by means of an off-site electro-catalytic synthesis technique operates stably, can be used for fundamental theoretical research, and has practical application significance.

This invention discloses a functionalized MXene-supported metal oxide catalytic material, its preparation method, and its applications. The preparation method includes: fully contacting a pretreated metal substrate with a liquid-phase system containing MXene and metal ions and reacting at high temperature, followed by annealing in air to obtain the MXene-supported metal oxide material; and then subjecting it to electrochemical or chemical treatment to obtain the functionalized MXene-supported metal oxide catalytic material. In the functionalized MXene-supported metal oxide catalytic material of this invention, electron transfer occurs between the functionalized MXene and the metal oxide, promoting the formation of more active sites in the metal oxide that are conducive to catalyst-reactant electron exchange, thereby improving the activity of the oxygen evolution reaction (OER). Simultaneously, the functionalized MXene has abundant surface groups, which can generate strong chemical interactions with the metal oxide, improving the stability of the metal oxide in acidic media.

The application provides a kind of in situ coated positive electrode material polymer monomer, its preparation method and application, with compound A shown structure: compound A, R1 It is C1~C3 alkyl, n is polymerization degree, n=6000~10000.The application realizes dense coating layer by in situ coated sodium electric layer oxygen positive electrode material through polymerization, avoids the loss of active sodium caused by the corrosion of active material by air, and improves the air stability.By using the conductive properties of the monomer pyrrole structure after polymerization and the active sodium ions contained in sodium sulfonate, the dual function of ion and electron conduction is realized, which ensures that the composite sodium ion positive electrode material obtained after coating has high ion conductivity and good electron conductivity, and meets the ion transmission and electron exchange of layer oxygen positive electrode material in the charging and discharging process.At the same time, the active sodium ions in sodium sulfonate can also supplement the active sodium ions of the positive electrode in the cycle process.

The present invention discloses a current collector with a fireproof coating, a preparation method thereof, an electrode sheet and a lithium ion battery prepared therefrom. The fireproof coating material includes an acid source, a carbon source, a gas source, a conductive agent, a binder, an antioxidant and a dispersant. The fireproof coating material is mixed evenly with a solvent to form a dispersed solution, which is coated on the surface of the current collector, and a fireproof coating is formed after heat treatment. A slurry containing positive and negative active substances is further coated on the current collector with the fireproof coating to form positive and negative electrode sheets. Then, the positive and negative electrode sheets are made into batteries. The fireproof coating has good chemical stability and has little effect on the charge and discharge performance of the battery. When the battery is in thermal runaway, the fireproof coating rapidly expands to form a porous heat-insulating carbonaceous protective layer and separates the active substance from the current collector, reducing the exchange of ions and electrons during the thermal runaway process, blocking heat transfer, and thus effectively improving the safety of the battery.

The invention is related to a layered double hydroxide electride which can be produced without high-temperature treatment, and a production method of which cost can be reduced. The layered double hydroxide electride contains electrons between layers and has an electron density of 2.0×1018 cm−3 or more. The method of producing the layered double hydroxide electride includes a step of mixing a starting layered double hydroxide with an electron exchanger for exchanging anions existing between layers of the starting layered double hydroxide for electrons to produce the layered double hydroxide electride.

The invention relates to modified charcoal based on short-chain fatty acid steam activation and application of the modified charcoal in promoting anaerobic digestion to produce methane. The method comprises the following steps: placing a short-chain fatty acid activation solution in a closed reactor, placing original biochar on a treatment platform above the closed reactor, heating the short-chain fatty acid activation solution to generate steam to activate and modify the biochar, and drying the biochar after the reaction is finished to obtain the modified biochar. The modified biochar is added into a high organic load inhibition anaerobic digestion system and is used as an electron transfer medium to promote direct interspecific electron transfer, and optimized functional groups on the surface of the modified biochar, methanogens and zymophytes form an electron exchange network, so that the methane yield is increased. Compared with the prior art, the surface chemical property of the biochar is optimized through short-chain fatty acid steam under mild conditions, and the electron transfer capacity of the biochar is remarkably improved, so that direct interspecific electron transfer is promoted, and the anaerobic digestion methane yield is improved.

The application discloses a hemoglobin-cobalt phosphate-cobalt phosphate iron hybrid nanoflower and a preparation method and application thereof, and belongs to the technical field of composite materials. The hemoglobin-cobalt phosphate-cobalt phosphate iron hybrid nanoflower is obtained by sequentially adding water-soluble starch, bovine hemoglobin freeze-dried powder, CoSO4 solution, PBS solution, FeSO4 solution and PBS solution into an aqueous solution in an oxygen-free and continuously stirred state through a one-pot method, and then standing and reacting. The synthesis method is simple in process, easy in raw material obtaining, green and environment-friendly, does not need special equipment, and can be prepared in batches. The prepared nanoflower is in the shape of a rose flower, has a large specific surface area and rich electric active centers. The synergistic effect between iron and cobalt ions not only promotes the exchange of electrons between the electric active centers and catalytic substrates, but also improves the intrinsic conductivity of the organic-inorganic hybrid nanoflower, accelerates the electron transmission between the electric active centers and the electrode, and can efficiently catalyze the reduction of hydrogen peroxide.

The invention provides a method for preparing gallium trichloride based on a hydrogen chloride gas method, and belongs to the field of gallium trichloride preparation. The method comprises the following steps: mixing metal inorganic salt with metal gallium to obtain a mixture; under the atmosphere of protective gas, hydrogen chloride gas is introduced into the mixture, heating is carried out, an oxidation-reduction reaction is carried out, and gallium trichloride gas is obtained; and cooling the gallium trichloride gas to obtain a gallium trichloride solid. The metal inorganic salt can be used as a reaction catalyst and directly participates in electron exchange on the surface of the metal gallium, the addition of the metal inorganic salt is equivalent to the construction of a micro electrode, the oxidation-reduction reaction can be enhanced, the electron transfer speed is obviously accelerated, and the reaction rate is further greatly improved. In practical application, after the metal inorganic salt is added, the preparation rate of the gallium trichloride is increased by 2-8 times compared with that of the gallium trichloride without the catalyst, and the purity of the finally obtained gallium trichloride can reach 3N-6N, so that the method for efficiently preparing the high-purity gallium trichloride is formed.

The invention discloses an interface regulation and control method for a graphene-copper composite material, relates to the technical field of metal-based composite material preparation, and aims to solve the problem of how to improve weak electron exchange between graphene and copper. The interface regulation and control method comprises the following steps: S1, raw material selection; a commercially available Gr / Cu / Gr foil is selected as a substrate, and high-purity metal particles are selected as an evaporation target material; s2, depositing metal; depositing heterogeneous metal layers with different thicknesses on the two surfaces of the substrate by using a vacuum thermal evaporation coating process to obtain the substrate wrapped by the heterogeneous metal layers; s3, metal deposition pretreatment; s2, performing thermal annealing treatment on the matrix obtained in the step S2 to obtain a heterogeneous metal coating with high crystallinity; and S4, stacking a plurality of substrates treated in the step S3 to construct an interface structure beneficial to electric conduction, and then preparing the high-electric-conductivity graphene copper block material through a vacuum hot press molding process.

This invention relates to a method for alleviating acidification in anaerobic reactors based on binary electroactive materials. The invention utilizes the capacitance of binary electroactive materials to increase their ability to receive and release electrons, thereby attracting hydrogen ions and electrons accumulated in the acidified reactor and alleviating acidification. The conductivity of the binary electroactive materials can enrich iron-reducing bacteria, couple and enhance the degradation of organic matter, and increase the electron exchange rate between acid-producing bacteria and methanogenic archaea, accelerating the conversion of small molecule acids to methane and further clearing the accumulation of small molecule acids. This method can replace the traditional method of adding alkaline reagents and has broad application prospects in alleviating acidification in anaerobic reactors and maintaining stable reactor operation.

The invention relates to the technical field of target material preparation, and provides a nickel ferrite target material and a preparation method thereof.The preparation method comprises the steps that NiO powder and Fe2O3 powder are provided and sequentially subjected to mixed ball milling, drying and calcination treatment with a dispersing agent and a solvent, and NiFe2O4 calcined powder is obtained; the A-doped Fe3O4 powder, NiFe2O4 calcined powder, a dispersing agent and a solvent are mixed, ball-milled and dried, and mixed powder is obtained; a is selected from at least one of MnO2, CuO, CoO, Cr2O3 and MgO; and carrying out pre-pressing treatment and hot-pressing treatment on the mixed powder, and then machining to obtain the nickel ferrite target material. The A-doped Fe3O4 powder is introduced, and Fe < 2 + > and Fe < 3 + > exist on octahedral sites in a crystal structure of the A-doped Fe3O4 powder at the same time, so that electron exchange can be realized through an oxygen ion bridge, a conductive path is constructed in the material, the conductivity of the target material is improved, and the requirement of a direct-current sputtering process is met.

Electron exchangers are placed in the conversion cell and divide it into cathode gas chamber, liquid conversion solution chamber filled with a multiple track injection liquid controller, and anode gas chamber. Voltage is applied to the electron exchangers to convert the liquid conversion solution to gases, and gases are released directly to the gas chambers. On the surfaces of the single sheets of the multiple track injection liquid controller, there are many tracks and puncture channels that are designed by critical surface calculations, and manufactured with a precision technology. A computing engine connected to the cloud is responsible for artificial intelligence calculations, and it controls valves, sensors, servo motors, and enhance gas flow devices. In producing the same amount of final gases, our method is energy efficient.

A method for modifying a lithium vanadium phosphate positive electrode material co-doped with yttrium and magnesium ions relates to the technical field of lithium ion battery positive electrode materials. The purpose of the present invention is to solve the problem of how to effectively improve the rate performance of lithium vanadium phosphate materials. The present invention provides a method for modifying a lithium vanadium phosphate positive electrode material, using the metal elements yttrium and magnesium to co-dope the lithium vanadium phosphate positive electrode material. The doping of the metal elements yttrium and magnesium effectively improves the electronic conductivity, realizes rapid electronic conduction between particles, is beneficial to the ion / electron exchange of active substances, greatly improves the performance of the positive electrode at high rates, and the cycle performance, and is simple to prepare, easy to control, has a short synthesis cycle, and has good application prospects. The present invention can obtain a method for modifying a lithium vanadium phosphate positive electrode material co-doped with yttrium and magnesium ions.