Abstract: The present disclosure belongs to the technical field of battery recycling, and discloses a method for recovering an aluminum residue with a controlled particle size, and use thereof. The method includes the following steps: crushing and sieving a positive electrode sheet of a waste power battery, then, crushing at ?198° C. to ?196° C. with addition of liquid nitrogen to obtain a granular material; roasting, cooling, and grinding the granular material, adding water, shaking, settling into layers, and separating the layers to obtain a positive electrode active powder layer, a transition layer, and an aluminum residue particle layer; and shaking the aluminum residue particle layer and the transition layer for a second time, settling into layers, and collecting aluminum residue particles and a positive electrode active powder.

Abstract: Disclosed in the present invention is a method for recovering nickel from iron-aluminum slag obtained by battery powder leaching. The method comprises the following steps: adding a sulfuric acid solution into an iron-aluminum slag to dissolve, so as to obtain a sulfate solution; then adding an oxidizing agent; adding ammonia water and carbonate into the oxidized sulfate solution; adjusting the pH to 1.0-3.2 for reaction; separating ferric hydroxide to precipitate to obtain an iron-removed solution; adding carbonate into the iron-removed solution, adjusting the pH to 3.2-5.5 for reaction; separating aluminum hydroxide to precipitate to obtain an aluminum-removed solution; adding ammonia water to the aluminum-removed solution, adjusting the pH to 7.0-8.8 for reaction; washing and removing impurities to obtain a nickel complex; adding an oxidizing agent to the nickel complex to break the complex, so as to obtain a nickel-containing solution.

Abstract: An carbon emission accounting system for sintering of lithium battery cathode materials includes: a material balance module, an energy balance module, a carbon emission accounting module, a data module, and a knowledge module, wherein the material balance module is to read a formula and data to account a loss of lithium during the sintering process; the energy balance module is to read a data to account an energy loss during the sintering process; the carbon emission accounting module is to read a formula, data, the loss of lithium element, and the energy loss to account carbon emission during the sintering process; the data module is used to store data; and the knowledge module is used to store formulas and parameter values in the accounting process.

Abstract: The present disclosure discloses a silicon-aluminum-iron composite material and a preparation method therefor and use thereof, and belongs to the technical field of wastewater treatment. The silicon-aluminum-iron composite material comprises an inner core and an outer shell wrapping the inner core; the inner core is a silicon-aluminum-based hollow sphere; the outer shell contains iron element; and there are holes on the silicon-aluminum-iron composite material. The silicon-aluminum-iron composite material of the present disclosure improves the specific surface area of the silicon-aluminum-iron composite material through structural adjustment. When it is used to adsorb heavy metal ions, the adsorption sites are correspondingly increased, which finally improves the adsorption capacity for heavy metal ions.

Abstract: Particles of the ternary cathode material include an active material matrix and a coating layer coated on the active material matrix. A coating effectiveness factor A of the ternary cathode material is 0.001 GPa/nm2-0.2 GPa/nm2. When the coating effectiveness factor A disclosed in the present disclosure is within the above range, the ternary cathode material features high structural stability, high cycling performance, low capacity decay rate, and low residual alkali content.

Abstract: A lithium iron phosphate cathode material includes primary particles and secondary particles formed by agglomeration of the primary particles. The lithium iron phosphate cathode material satisfies FSSS D BET = 5 - 40 and ?%=50%-90%. The lithium iron phosphate cathode material exhibits good dispersibility, low agglomeration degree, and high compacted density, and a cathode sheet prepared therefrom demonstrates uniform areal density and high peel strength, so that a battery prepared from the cathode sheet has high specific capacity and superior cycling stability.

Abstract: The present disclosure discloses an aluminum-doped cathode material precursor, and a preparation method therefor and use thereof. The preparation method includes: adding a solution of mixed salts of nickel, cobalt, and calcium, a first aluminum-containing alkali solution, aqueous ammonia, and a sodium hydroxide solution to a medium solution to allow a reaction, and subjecting a resulting reaction product to solid-liquid separation (SLS) to obtain a filter cake; soaking the filter cake in a second aluminum-containing alkali solution, and conducting SLS to obtain a solid material; subjecting the solid material to calcination to obtain a calcined material, and soaking the calcined material in water to obtain the aluminum-doped cathode material precursor.

Abstract: The present disclosure discloses a high-performance lithium-nickel-manganese-cobalt oxide (LNMCO) cathode material for power batteries and a preparation method thereof, and belongs to the technical field of lithium-ion battery (LIB) materials. The preparation method of an LNMCO cathode material of the present disclosure combines a melting and mixing method, a spray drying method, a sol-gel method, and a high-temperature solid-phase method to achieve thorough mixing of various components of a precursor, such that a prepared product has a uniform particle size, excellent electrochemical performance, and high cycling stability. The method has simple operation steps, low raw material cost, small time consumption, and high production efficiency, and can realize industrialized large-scale production. The present disclosure also provides an LNMCO cathode material prepared by the method, which has high specific charge/discharge capacity, thermal stability, and cycling stability.

Abstract: The present disclosure provides a disassembly mechanism, a disassembly system of a power battery pack with the disassembly mechanism and a disassembly method of the power battery pack. The above disassembly mechanism includes a die base assembly, a pressing assembly and a removal tool assembly. The pressing assembly is movably connected to the die base assembly, and is used to abut against and press a single battery of a power battery pack. The removal tool assembly is slidably connected to the die base assembly and elastically connected to the die base assembly. The removal tool assembly is used to squeeze and separate a casing and the single battery of the power battery pack. The above disassembly mechanism can realize automatic disassembly of the power battery pack with few manual intervention, and solves the problem of low efficiency in the recycling and disassembly process of the power battery pack.

Abstract: A lithium iron phosphate cathode material includes a matrix and a carbon coating layer coated on a surface of the matrix. A crystal structure factor A of the lithium iron phosphate cathode material satisfies 4.600 ??4?A?9.500 ??4. The calculation formula of the crystal structure factor A is: A = C × 10 5 D ? ( 0 ? 1 ? 0 ) × V ; wherein C is a crystallinity of the crystal; V is a unit cell volume; D(010) is a grain size of a crystal plane D(010), with a value satisfying 4 ??D(010)?9 ?. Lithium iron phosphate cathode materials that meet the above range have excellent low-temperature electrochemical properties.

Abstract: A ternary cathode material precursor has a general formula of NiaCobM1-a-b(OH)2, wherein 0.3?a<0.98, 0<b<0.5, 0<1-a-b<0.5, and M is at least one of Mn or Al; wherein the ternary cathode material precursor includes effective pores and ineffective pores; the effective pores are pores allowing water to enter under a standard atmospheric pressure and the ineffective pores are pores not allowing water to enter under a standard atmospheric pressure; the ternary cathode material precursor has an effective specific pore volume ratio of 75% to 90%.

Abstract: A single-crystal ternary cathode material has an apparent factor Z = ( 1 S ? ( D 9 ? 0 ) ) x × H 1 . 2 - 1 ? 9 . 4 × 0 . 1 ? 8 x , with 1.1?Z?3; x=D90/D10, 2?x?5; wherein S(D90) is a number-average circularity equal to a sum of circularities of all target particles divided by n, n is a total number of the target particles. An area and a perimeter corresponding to a two-dimensional projected image of an individual target particle are S1 and l1 respectively, a circle with the area S1 has a perimeter of l2 and a circularity=l2/l1; H = D 1 ? 0 ? D 1 ? 0 × 1 ? 0 ? 0 ? % , D10? is a particle size of a material obtained by pressing the single-crystal ternary cathode material under a pressure of 200 MPa, D10 does not exceed 2.4 ?m, and D10? does not exceed 2.3 ?m.

Abstract: A lithium iron phosphate cathode material includes a lithium iron phosphate matrix and a carbon coating layer coated on a surface of the lithium iron phosphate matrix. An average standard deviation of a thickness of the carbon coating layer of the lithium iron phosphate cathode material is ?(d), and 0.05 nm??(d)?0.35 nm; and an average standard deviation of a carbon content of the lithium iron phosphate cathode material is ?(Cwt %), and 0.02 wt %??(Cwt %)?0.35 wt %.

Abstract: The ability of a polycrystalline cathode material to resist the generation of internal cracks during cycle is evaluated by anti-cracking strength. By providing a cathode material, which has an anti-cracking strength that satisfies a specific range, and a high-strength crystals and grain boundaries, so that the structural stability of the material can be improved, and the diffusion of the internal cracks to the interface can be effectively inhibited, thereby improving the cycle stability and lifetime of the material.

Abstract: An iron phosphate material is composed of secondary particles formed by agglomeration of primary particles, an equivalent particle size of the primary particles is 20 nm-600 nm, and a D50 of the secondary particles is 5 ?m-20 ?m. A hardness index of the iron phosphate material is less than or equal to 5; the hardness index is equal to L ¯ V p , wherein L is an average aspect ratio of the primary particles, which refers to a ratio of an average length of the longest axis to an average length of the shortest axis of the primary particles; and is a specific pore volume of the iron phosphate material expressed in cm3/g.

Abstract: A method for recycling a lithium battery cathode material. Residual aluminum on the positive electrode sheet is dissolved by a sodium hydroxide solution, and lithium in the cathode material enters the solution during the dissolution of aluminum, such that an ionic potential is vacated on the cathode material; a residue is washed to avoid sodium ion contamination, then dried, and allowed to react with metallic lithium and lithium sulfide under heating, such that crystal lattices of the material change; a product after first-stage lithium supplementation is directly sintered with a lithium source in an oxygen atmosphere to obtain monocrystalline ternary cathode material agglomerates, where a sintering method and a sintering temperature are controlled; and the agglomerates are crushed, then washed to remove residual lithium on the surface, and dried to obtain a monocrystalline ternary cathode material, which has the performance close to that of the initially synthesized monocrystalline cathode material.

Abstract: Provided is a carbon emission monitoring system. The system includes an oxidation device (1), a gas mixing device (2), a gas measurement device (3), and a control device; the oxidation device (1), the gas mixing device (2), and the gas measurement device (3) are sequentially connected; the control device is separately connected to the oxidation device (1), the gas mixing device (2), and the gas measurement device (3); the input end of the oxidation device (1) receives waste gas, and the output end of the gas measurement device (3) discharges waste gas.

Abstract: The present application discloses a nickel-cobalt-manganese ternary positive electrode material nanorod and the use thereof. The chemical general formula of the nickel-cobalt-manganese ternary positive electrode material nanorod is LiNi1-x-y-zCoxMnyAlzO2, where 0<x<1, 0<y<1, and 0?z?0.05; the nickel-cobalt-manganese ternary positive electrode material nanorod has a section diameter of 50-200 nm and a length of 0.1-5 ?m. In the present application, a mixed metal salt solution of nickel, cobalt, manganese, aluminum and lithium and 8-hydroxyquinoline are subjected to complex-precipitation to generate a precipitate containing nickel, cobalt, manganese, aluminum and lithium, and then the precipitate is calcined to prepare a ternary positive electrode material nanorod.

Abstract: Disclosed are a carbon emission accounting method, a device and a system for recycling of waste battery. The carbon emission accounting apparatus includes a data collection unit and an average-value calculation unit. The carbon emission accounting apparatus includes a collection transmission module and a calculation processing module. The method includes: collecting carbon emission data groups for multiple times within a period; and according to the carbon emission data groups and a preset carbon emission accounting formula group, calculating an average carbon emission amount corresponding to data collected for multiple times within the period.

Abstract: The present disclosure discloses a preparation method of tungsten-doped cobalt tetraoxide and use thereof. The preparation method includes the following steps: dissolving a tungsten-containing compound and a molybdenum-containing compound in an alkali liquid to obtain a mixed solution; concurrently feeding the mixed solution, a cobalt salt solution, and a complexing agent into a base solution to allow a reaction to obtain a precipitate; roasting the precipitate in an oxygen-containing atmosphere to obtain a roasted material; and soaking the roasted material in a sodium sulfide solution to obtain the tungsten-doped cobalt tetraoxide. In the present disclosure, tungsten is doped, and tungsten has a large atomic radius, which stabilizes an internal structure of the material, expands the ion channel, and improves the cycling performance of the material; and molybdenum is removed through a soaking process, which provides atomic vacancies to further improve a specific capacity of the material.