1158results about "Manganese compounds" patented technology

The present application provides a lithium iron phosphate composite material, a preparation method and use. The lithium iron phosphate composite material includes a core and a shell coated on the core, in particular, the core is Li6MnO4, and the shell is carbon-coated lithium iron phosphate. The lithium iron phosphate composite material provided by the present application adopts Li6MnO4 as the positive electrode lithium supplement material, and solves problems of active lithium loss and capacity depletion under high-rate charge and discharge of lithium iron phosphate positive electrode, thereby improving the rate performance of the lithium iron phosphate materials and the cycle life of batteries at high rates.

The invention belongs to the technical field of battery materials, and particularly discloses preparation and application of a strontium lanthanum manganate-coated lithium ferric manganese phosphate composite material, and the method comprises the following steps: firstly, preparing strontium lanthanum manganate by adopting a lanthanum source, a strontium source and a manganese source as raw materials; respectively adding a lithium source, a phase transfer agent, a phosphorus source, L-ascorbic acid, an iron source and a manganese source into a solvent, and preparing a lithium ferric manganese phosphate precursor by using a solvothermal method; the lithium ferric manganese phosphate material is coated twice through strontium lanthanum manganate and carbon. According to the invention, strontium lanthanum manganate is used as a coating material, and the addition of lanthanide elements improves the crystal stability of lithium ferric manganese phosphate, keeps the integrity of an olivine-type structure, and avoids capacity fading caused by structure collapse, thereby improving the cycle stability of the lithium ion battery.

The invention provides an in-situ synthesis method and application of aluminum-doped battery grade manganous-manganic oxide and lithium manganate. An aluminum-doped manganous-manganic oxide precursor is synthesized in one step through a direct homogeneous oxidation method, and then the lithium manganate positive electrode material is prepared through a high-temperature solid-phase reaction. The technological parameters such as the volume of a base solution, the concentration of a manganese-containing solution, the concentration of ammonia water, the flow of a salt solution, the stirring speed and the reaction temperature are regulated and controlled, and the synthesized manganous-manganic oxide precursor is uniform in particle size and has relatively high tap density and relatively low specific surface area. The capacity retention ratio of the obtained aluminum-doped lithium manganate reaches 85.16% after the aluminum-doped lithium manganate is circulated for 100 circles at the rate of 0.2 C, and the discharge specific capacity of the aluminum-doped lithium manganate is 105.8 mAh / g at the high rate of 5C. According to the method, the efficient recycling of waste battery resources is realized, the production cost is reduced, and meanwhile, the problem of non-uniformity of a conventional doping process is solved.

The invention relates to the technical field of gas sensors, and particularly discloses an electrochemical formaldehyde sensor electrode, a preparation method thereof and an electrochemical formaldehyde sensor. The electrochemical formaldehyde sensor comprises an electrochemical formaldehyde sensor electrode and a binary electrolyte, the electrochemical formaldehyde sensor electrode comprises a polytetrafluoroethylene film, the polytetrafluoroethylene film is coated with slurry for an electrochemical formaldehyde sensor electrode; and the slurry is formed by mixing nano manganese dioxide, platinum carbon and a Nafion solution. According to the electrochemical formaldehyde sensor, the electrode prepared from the slurry formed by mixing the nano manganese dioxide, the platinum carbon and the Nafion solution has relatively high catalytic activity, so that the sensor shows extremely high sensitivity and extremely good linearity on formaldehyde, and the electrochemical formaldehyde sensor has relatively high catalytic activity by regulating and controlling the proportion of the binary electrolyte. The electrochemical formaldehyde sensor has the advantages of high sensitivity, low cost, fast response, high detection precision and the like.

The present invention relates to the field of battery materials, and provides a lithium manganate cathode material coated with lithium triborate and a preparation method thereof. The cathode material is a porous lithium manganate / lithium triborate composite electrode material, which includes porous lithium manganate with a highly connected directional columnar pore structure and a lithium triborate coating covering the pore surface, with a mass ratio of (86.0~92.0):(8.0~14.0), a coating thickness of 600~800 nm, a pore diameter of 45~95 μm, and a porosity of 65~78%. The preparation method includes: preparing a precursor colloidal solution by the sol-gel method, obtaining porous lithium manganate through low-temperature freezing molding and freeze-drying, and forming a cathode substrate through pre-oxidation and high-temperature sintering; subsequently, using vacuum-assisted impregnation, ultrasound, and nitrogen pressure to promote the penetration of the lithium triborate precursor solution, and forming a uniform coating layer through gradient drying and annealing treatment. The present invention significantly improves the crystal structure stability of the cathode material, inhibits manganese dissolution, improves the cycle life and rate performance, and has wide application value.

The invention relates to the technical field of preparation of manganous-manganic oxide, in particular to a production and preparation process of a manganous-manganic oxide material for batteries, which comprises the following steps: dissolving high-purity manganese sulfate to prepare a manganese sulfate solution, and adding a dispersing agent and a surfactant to obtain a manganese salt solution; the method comprises the following steps: adding a base solution into a reaction kettle, stirring and heating, conveying a manganese salt solution and ammonia water, synchronously introducing oxygen, dividing the whole oxidation reaction process into two stages, controlling the flow velocity of the ammonia water in different stages, and dynamically adjusting the temperature; and carrying out suspension precipitation on manganous-manganic oxide obtained by the oxidation reaction, aging, and carrying out dehydration suction filtration, washing and drying to obtain the manganous-manganic oxide material for the battery. The invention aims to adjust the morphology of the manganous-manganic oxide finished product by controlling reaction conditions, effectively reduce the granularity of the product and enhance the uniformity of particle size distribution.

The invention provides a lithium-rich manganese-based positive electrode material, a preparation method thereof and a lithium ion battery, and relates to the field of lithium ion batteries. Comprising a base body, a first coating layer and a second coating layer, the chemical general formula of the matrix is LiaNixCoyMnzMwO (1 + a-b) Rb, M comprises one or more of Al, Mg, Mn, Zr, Ti, W, Nb, Ta, Te, Na, La and Sr, R comprises one or more of Cl, N and S, 1.2 < = a < = 1.4, 0 < = b < = 0.1, 0.25 < = x < = 0.4, 0 < = y < = 0.1, 0.6 < = z < = 0.75, 01t, and 0 < = y < = 0.1. W < = 0.02, and x + y + z + w = 1; the first coating layer comprises spinel phase and / or spinel-like phase lithium manganese oxide; the second coating layer includes a Y-containing compound. And the cycling stability and the ionic conductivity of the lithium-rich manganese-based positive electrode material can be effectively improved.

The present invention provides a cathode material, a preparation method thereof and an application. The chemical formula of the cathode material is xLi2MnO3·(1−x−y)LiNi a T M(1‑a) O2·yLiMn b A (1‑b) PO4, wherein 0 < x < 1, 0 < y < 1, 0 ≤ a ≤ 1, 0.5 ≤ b ≤ 1, T M and A each independently include a metal element; the cathode material can form a continuous phase transition, has a supercrystalline domain structure and a stable layered structure, can stabilize lattice oxygen, reduce voltage drop, and thus can significantly improve the cycling performance of the battery at high voltages.

The invention discloses a nitrogen-doped zinc ion battery manganese-based positive electrode material and a preparation method and application thereof, and the preparation method comprises the following steps: mixing a strong oxidant and a manganese salt, putting the mixture into a beaker, adding deionized water, and uniformly stirring to form a mixed solution; transferring the mixed solution into a high-pressure reaction kettle with a polytetrafluoroethylene lining, and heating the high-pressure reaction kettle in a drying oven; cooling, precipitating, filtering and washing for multiple times, and then putting into a drying oven for vacuum drying to obtain an original manganese-based positive electrode material; the preparation method comprises the following steps: respectively weighing an original manganese-based positive electrode material and hexamethylenetetramine, flatly laying the original manganese-based positive electrode material at the bottom of a lining of a reaction kettle, and putting the hexamethylenetetramine into a beaker; and putting the beaker into a reaction kettle, moving the beaker and the reaction kettle into a drying oven, and heating to obtain the surface nitrogen-doped manganese-based positive electrode material.

The present invention relates to the field of lithium-ion batteries, and more specifically, to a positive electrode material, a preparation method thereof, a positive electrode, and a battery. The present invention provides a positive electrode material comprising a lithium-rich core and a conductive layer coated on the surface of the lithium-rich core; at least one of the core and the conductive layer is doped with at least one of the elements P and B. The positive electrode material provided by the present invention, having a conductive layer doped with at least one of the elements P and B, can stabilize the material structure and improve the material's rate capability and cycling stability.

A positive electrode active material for nonaqueous electrolyte secondary batteries according to the present invention is a composite oxide which is represented by general formula LixTMtmMyO2-fFf and has a crystal structure that belongs to the space group Fm-3m; and in the general formula, TM represents a transition metal, M represents a non-transition metal, and if Q=2×tm×(1−(1−f / 2)5), Q<1 is satisfied. With respect to a dV / dq-SOC curve showing the relationship between the state of charge SOC and dV / dq of a half cell that contains this composite oxide, the dV / dq-SOC curve being obtained by charging the half cell with a charging current of 0.1 C at 25° C. to an end voltage within the range of 4.7 V to 4.95 V, there is one or more peaks within the SOC range from 10% to 40%.

A composite cathode active material and a cathode and a lithium battery including the composite cathode active material. The composite cathode active material has a core including a plurality of primary particles including a nickel-containing first lithium transition metal oxide having a layered crystal structure; a grain boundary disposed between adjacent primary particles of the plurality of primary particles; and a shell on the core, the shell including a second lithium transition metal oxide having a spinel crystal structure, wherein the grain boundary includes a first composition having a spinel crystal structure.

The invention relates to the technical field of resource recycling of manganese-containing wastewater, in particular to a process for preparing industrial-grade manganese carbonate by using a recycled manganese chloride solution, which adopts a two-stage purification and impurity removal strategy, performs primary purification and impurity removal by using sodium sulfide and sodium fluoride, and performs secondary impurity removal by using iminodiacetic acid grafted chelating resin. According to the invention, the problems of poor adaptability and incomplete impurity removal of the manganese chloride solution in the prior art are solved, the purity of the product is obviously improved so as to meet the requirements of the industrial grade manganese carbonate, and the process flow is simple.

The invention discloses modified humic acid as well as a preparation method and application thereof, and relates to the technical field of humic acid modification. The preparation method comprises the following steps: activating mineral source humic acid, and adding a manganese-based activator to obtain activated humic acid; adding activated humic acid, a grafting agent and a silane monomer into a cross-linking system, stirring, standing, and then heating for reaction; after the reaction is finished, adjusting the pH value to be alkaline, keeping heating and stirring, and then drying to obtain modified humic acid; wherein the grafting agent comprises the following raw materials: sodium sulfite and acetylacetone. The modified humic acid still has high water solubility in hard water, and flocculent precipitate formed by the humic acid and metal ions can be avoided.

The invention discloses a modification mode and application of a cobalt-free lithium-rich manganese-based positive electrode material, and belongs to the technical field of lithium ion battery positive electrode materials. The preparation method specifically comprises the following steps: preparing a cobalt-free lithium-rich manganese-based precursor by adopting a coprecipitation method, uniformly mixing the cobalt-free lithium-rich manganese-based precursor with a lithium source and a boron source according to a certain proportion, and performing primary burning treatment in air; uniformly mixing the boron-doped cobalt-free lithium-rich manganese-based positive electrode material with an ammonia source according to a certain mass percent, and carrying out secondary burning treatment in a protective atmosphere; and naturally cooling to obtain the surface-modified cobalt-free lithium-rich manganese-based positive electrode material. The cobalt-free lithium-rich manganese-based positive electrode material obtained by the method sequentially comprises a bulk-phase boron-doped layered structure and a spinel structure with oxygen vacancies on the surface from inside to outside; the modified positive electrode material has the characteristics of high specific discharge capacity, high first efficiency, good cycle performance, good rate capability, small voltage drop and less gas production, and has the advantages of low cost, easiness in preparation and large scale.

The invention discloses a Ru-Mn2O3 / MnO2 composite material used as an acidic OER electrocatalyst and a preparation method of the Ru-Mn2O3 / MnO2 composite material. The preparation method of the composite material comprises the following steps: calcining prepared MnO2 nano powder as a reaction precursor by using an ultrafast sintering technology to obtain a Mn2O3 / MnO2 composite material; and preparing a uniformly dispersed aqueous solution from the MnO2 and ruthenium chloride hydrate, and obtaining Ru-Mn2O3 / MnO2 by utilizing the principle of electrochemical replacement reaction. The preparation method disclosed by the invention has the advantages of low raw material cost, mild reaction conditions, high reaction rate, energy conservation, environment friendliness and the like; according to the preparation method disclosed by the invention, the Mn2O3 / MnO2 composite material is prepared by regulating and controlling the ultra-fast sintering reaction temperature; the Ru-Mn2O3 / MnO2 composite material prepared by the invention is used as an OER electrocatalyst, has low overpotential in an oxygen evolution reaction under an acidic condition, and shows a good acidic electrocatalytic oxygen production application prospect.

The preparation method comprises the following steps: dissolving lithium nitrate, manganous nitrate, cobalt nitrate, nickel nitrate, an organic fuel and an organic carbon source in deionized water to obtain a uniform mixed solution, atomizing the mixed solution to form carbon-containing fog drops, and preparing the lithium-rich manganese-based positive electrode material with the hierarchical pore micro-nano structure by taking nitrogen as a protective gas and a carrier gas, so as to obtain the lithium-rich manganese-based positive electrode material with the hierarchical pore micro-nano structure. Carrying out self-propagating combustion reaction on the carbon-containing fog drops at a certain ignition temperature to obtain combustion product powder; placing the combustion product in a crucible, and calcining in an inert atmosphere to obtain calcined powder; placing the calcined powder in a crucible, and calcining in an air atmosphere to remove carbon; and fully grinding the calcined product to obtain the lithium-rich manganese-based positive electrode powder with the hierarchical pore micro-nano structure. The lithium-rich manganese-based positive electrode material with the microporous-mesoporous hierarchical pore micro-nano structure is obtained, and the cycling stability of the lithium-rich manganese-based positive electrode material can be effectively prolonged. The method is simple and convenient in process, low in energy consumption, low in price and high in capacity preservation rate, and has a relatively good industrial application prospect.

Process for the manufacture of a fluoride doped cathode active material wherein said process comprises the steps of (a) providing a particulate oxide or (oxy)hydroxide or carbonate of TM wherein TM comprises nickel and manganese and wherein at least 50 mol-% of TM is manganese, wherein said particulate oxide or (oxy)hydroxide has an average particle diameter (D50) in the range of from 1 to 16 pm, (b) providing a source of lithium that contains 0.01 to 2.5 up by weight of fluoride, uniformly dispersed within said source of lithium, (c) mixing said oxide or (oxy)hydroxide or carbonate of TM with said fluoride-containing source of lithium and, optionally, with additional source of lithium containing less fluoride, and, optionally, with one or more dopants based on at least one metal other than lithium, (d) treating the mixture obtained from step (c) thermally.

The invention provides a single-crystal cobalt-free lithium-rich manganese-based positive electrode material as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing a cobalt-free lithium-rich manganese-based precursor material, a lithium source and a grain boundary separation auxiliary agent to obtain a mixed material; the mixed material is subjected to two-stage sintering, the two-stage sintering comprises first sintering and second sintering in sequence, and the single-crystal cobalt-free lithium-rich manganese-based positive electrode material is obtained, wherein primary crystal grains of the cobalt-free lithium-rich manganese-based precursor material are of a sheet structure. According to the invention, the cobalt-free lithium-rich manganese-based precursor material of which the primary crystal grains are of a sheet structure is taken as a raw material, and under the action of the grain boundary separation auxiliary agent, a two-stage sintering process is cooperatively matched, so that the single-crystal cobalt-free lithium-rich manganese-based positive electrode material which is uniform in grain size, high in dispersity, complete in crystal grains and continuous in interface is obtained, and the cobalt-free lithium-rich manganese-based positive electrode material is not only suitable for a liquid lithium ion battery, but also suitable for a lithium ion battery. The material is more suitable for a solid-state lithium ion battery, and the electrochemical performance of the battery is effectively improved.

Disclosed are positive electrode active materials for a rechargeable battery, positive electrodes including the positive electrode active materials, and rechargeable lithium batteries including the positive electrode active materials. The positive electrode active material comprises first particles comprising a compound having an olivine structure, second particles comprising a compound having a spinel structure, and third particles comprising a compound having a layered structure. The first particles and the second particles constitute a main active material, and the amount of the main active material is about 80 parts by weight to about 90 parts by weight based on 100 parts by weight of the positive electrode active material.

The invention provides a positive electrode material and a preparation method thereof, a battery and an electric device. The positive electrode material comprises a substrate and a coating layer, the coating layer coats at least one part of the surface of the substrate, the substrate comprises spinel lithium manganese oxide and layered lithium manganese oxide distributed on the surface layer of the spinel lithium manganese oxide, the chemical formula of the layered lithium manganese oxide comprises LicMndOe, c is greater than or equal to 1 and less than or equal to 3, c / d is greater than 0.5, (2e-c) / d is greater than or equal to 3 and less than or equal to 4, and the coating layer comprises a solid electrolyte.

The invention belongs to the technical field of lithium ion battery electrode materials, and particularly discloses a diameter-controllable one-dimensional lithium manganate nanorod as well as a preparation method and application thereof. The preparation method comprises the following steps: dispersing manganese sulfate, potassium permanganate, a structure-directing agent and a surfactant into a solvent, and carrying out hydrothermal reaction to obtain a black precipitate; sintering the black precipitate to obtain a manganese dioxide nanorod; and mixing the manganese dioxide nanorod with lithium hydroxide, and carrying out two-stage sintering to obtain the one-dimensional lithium manganate nanorod. The prepared lithium ion battery anode material is uniform in thickness and very small in surface energy, can effectively shorten the transmission path of lithium ions when being used as an anode material, is not easy to agglomerate, has good flexibility, can maintain the structural integrity in a large-current long-time service process, and is beneficial to improving the rate and cycle performance of an electrode. In addition, by adjusting the concentration of potassium permanganate and the hydrothermal reaction temperature, the diameter of manganese dioxide can be accurately adjusted, and controllable preparation of one-dimensional lithium manganate is realized.

The invention discloses a single-crystal lithium-rich manganese-based positive electrode material as well as a preparation method and application thereof. The preparation method of the single-crystal lithium-rich manganese-based material comprises the following steps: synthesizing a nickel-cobalt-manganese hydroxide as a precursor by using a coprecipitation method, then fully mixing the precursor with a lithium source, and then preparing the single-crystal lithium-rich manganese-based positive electrode material by adopting a stepped sintering schedule in combination with a high-temperature-section short-time low-oxygen-partial-pressure mixed atmosphere. According to the method, a stepped sintering schedule is adopted, the conditions such as the temperature, the heating and cooling rate and the atmosphere during sintering are reasonably regulated and controlled, the stepped sintering schedule is beneficial to optimizing the processes such as crystal crystallization, crystal growth and crystal defect repair, the short-time low-oxygen-partial-pressure mixed atmosphere in the high-temperature section is beneficial to achieving better crystal domain dispersion, the staggered structure of the Li2MnO3 phase is improved, and the performance of the lithium ion battery is improved. And finally, the micron-sized single-crystal lithium-rich manganese-based positive electrode material with good grain size consistency is obtained.

The invention provides a positive electrode active material and a preparation method thereof, a positive electrode plate, a battery and electric equipment, the positive electrode active material comprises a compound shown in a formula I: Li < 1 + a > M < x > Q < y > O < 2-z > G < z >, a + x + y = 1, and 0 < = alt; 1, 0 < = xlt; 1, 0 < = y < lt >; 0 < = z < 2, and the positive electrode active material has a disordered rock salt structure; the positive electrode active material comprises secondary particles formed by aggregation of primary particles, the ratio of the volume distribution median particle size Dv50 of the secondary particles to the average particle size d1 of the primary particles is 10-400, the secondary particles have pores, and the porosity of the secondary particles is 10-50%. Therefore, the compaction density, the ionic conductivity and the electronic conductivity of the positive electrode active material are improved, and the proper porosity is beneficial to stress release during lattice expansion / shrinkage in the charge-discharge process, so that the generation of microcracks is reduced, and the cycle performance of the material is improved. And thus, the positive electrode active material with relatively high compaction density, particle size, rate capability and long cycle life is obtained.

The invention relates to the technical field of battery positive electrode materials, discloses a manganese-based battery positive electrode material precursor as well as a preparation method and application thereof, and belongs to the technical field of battery preparation. According to the technology for preparing the manganese-based battery positive electrode material precursor, a solid-phase method is mainly adopted, a high-temperature melting technology is adopted, the manganese-based positive electrode material is subjected to doping modification through multiple elements at the same time, then surface coating is carried out, the density of the synthesized positive electrode material is improved, the structural stability of the synthesized positive electrode material is enhanced, and the morphology, the crystal face and the crystal boundary of the positive electrode material are optimized; the side reaction between the crystal interface of the positive electrode material and electrolyte is inhibited, the service life is prolonged, and the safety performance during use is enhanced. A small amount of water vapor and carbon dioxide gas generated in the preparation process are discharged at high altitude, so that the environment is not polluted.

A method for preparing a lithium-rich manganese-based positive electrode material through sanding and spraying double coupling comprises the following steps: adding a lithium source, a nickel source, a cobalt source and a manganese source into deionized water, heating to dissolve the lithium source, the nickel source and the cobalt source in the deionized water, stopping heating, and continuing magnetic stirring to uniformly disperse the manganese source to obtain a metal salt precursor suspension; adding a dispersing agent into the metal salt precursor suspension liquid, sanding through a nano sand mill, and refining particles in the metal salt precursor suspension liquid until the particle size distribution D50 is 150nm + / -20nm; and carrying out high-temperature spray drying and high-temperature sintering on the refined metal salt precursor suspension to obtain the lithium-rich manganese-based positive electrode material. The method has the advantages of reasonable process, simplicity in operation, no need of introducing a modified coating material, low cost and environmental friendliness, and can improve the diffusion speed of lithium ions of the material in the positive electrode material, accelerate the diffusion kinetics of the lithium ions, improve the transmission channel of the lithium ions so as to improve the capacity and improve the energy density at the same time.

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

The invention discloses a CuS (at) gamma-MnS heterojunction photocatalyst as well as a preparation method and application thereof. The catalyst is a heterojunction photocatalytic composite material formed by growing CuS nanosheets on a blocky gamma-MnS semiconductor material; during preparation, wurtzite phase gamma-MnS is synthesized at normal temperature through a ball milling method, CuS nanosheets grow in situ in combination with a low-temperature oil bath method to form a tight heterogeneous interface, and the crystal form regulated CuS gamma-MnS heterojunction photocatalyst is obtained. The CuS (at) gamma-MnS heterojunction photocatalyst based on crystal form regulation and control shows enhanced hydrogen production, double water decomposition and tetracycline hydrochloride degradation properties and excellent photocatalytic stability; the crystal form of the CuS-coated gamma-MnS heterojunction photocatalyst is accurately regulated and controlled through the full-normal-temperature process (ball milling and low-temperature oil bath), kilogram-level production can be achieved, energy consumption is reduced, and a new strategy is provided for design of industrial-level photocatalysts.

The application discloses a treatment method of a manganese-copper mixed solution, comprising the following steps: step (S1): adjusting the pH value of the manganese-copper mixed solution to 6.5-7, and obtaining a solution defined as a first solution; step (S2): adding an oxidizing agent to the first solution, and obtaining a solution defined as a second solution, wherein the oxidizing agent is oxidized with Mn 2+ to generate MnO2 in the range of the pH value of 6.5-7; and step (S3): collecting a first precipitate. The method has the advantages that the manganese ion can be separated in a short time, high-purity manganese ions can be recovered, the treatment method of waste liquid after recovery is simple, and the environment is less polluted.

The invention discloses a sodium ion battery layered oxide positive electrode material with multiple superlattice ordered composite structures and a preparation method of the sodium ion battery layered oxide positive electrode material, two or more superlattice structures simultaneously exist in a transition metal layer of a layered oxide and are mutually compounded, namely NaxAyBzO2, 0 < x < = 1, y + z = 1, A is at least one of Na, Li, Mg, Cu, Ni, Co, Zn or vacancy (-), B is at least one of Mn, Sb, Te, Bi, Sn and Ru, and x is more than 0 and less than or equal to 1. At least three elements A and B are selected to spontaneously form at least one superlattice ordered structure, and at least two different superlattice ordered arrangement structures exist in the transition metal layer. The advantages of different superlattice structures are integrated, the anion redox reaction is effectively excited, the bulk phase structure stability of the material is enhanced, the voltage hysteresis is improved, and the rate capability of the material is effectively improved.