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: 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: 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: 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.

Abstract: A battery conveyor belt includes a base, a plurality of parallel connecting shafts arranged on the base at intervals, and a plurality of conveying wheels arranged on the connecting shafts and each include a stator sleeved on the connecting shaft and fixed thereto, a rotor, a coil sleeved outside the stator, a pusher, a receiver located on the rotor, a control circuit, and a hub; the rotor is sleeved outside the coil, and there is a gap between the rotor and the coil; the hub is sleeved outside the rotor, and a first bearing is connected between the hub and the rotor; the pusher is connected to the hub and the rotor; the rotor drives the hub to rotate through the pusher; the control circuit is electrically connected to the coil and the receiver; and when a battery is placed on the hub, the pusher is pressed against the receiver.

Abstract: The present disclosure belongs to the field of battery materials, and discloses a coated nickel-rich ternary material and a preparation method and application thereof. The coated nickel-rich ternary material has a chemical formula of LiNixCoyMnzO2·a[M3(PO4)2·bH2O], Where 0.6?x?0.8, 0.1?y?0.2, 0.1?z?0.2, x+y+z=1, 0.01?a?0.03, 3?b?8, M3(PO4)2·bH2O is at least one selected from the group consisting of nickel phosphate, cobalt phosphate and manganese phosphate; the coated nickel-rich ternary material has a flower-like structure. The preparation method of the present disclosure provides phosphate ions through the prepared phosphate solution, performs coating in a liquid phase environment, and synthesizes the precursor simultaneously by microwave hydrothermal synthesis, which is beneficial to the full contact between the phosphates and the precursor, and ensures the surface of the nickel-rich ternary precursor is uniformly coated with the phosphates. The method is simple and has good coating effect.

Abstract: The present disclosure discloses a wet process for recovering valuable metals from a lithium battery. In the method, a waste lithium battery powder is subjected to selective leaching under the condition that a hydrogen sulfide gas is introduced through pressurization, such that Mn2+, Li+, and Al3+ metal ions enter a first-stage leaching liquor and nickel, cobalt, copper, and iron exist in a first-stage leaching residue in the form of a sulfide; then a pH of the first-stage leaching liquor is adjusted to remove aluminum and manganese, which achieves extremely thorough metal separation and leads to relatively pure products; a first-stage leaching residue is subjected to leaching in an acid liquor under a negative pressure, such that the sulfides of nickel, cobalt, iron, and copper are dissolved in a second-stage leaching liquor, and a hydrogen sulfide gas produced can be recycled in the first-stage leaching procedure through pressurization.

Abstract: The present disclosure discloses a preparation method and use of a high-performance modified lithium-nickel-manganese-cobalt oxide (LNMCO) nickel 55 material. In the preparation method of the present disclosure, a silica template-containing nano-precursor coated with a polymer is prepared by electrospinning, and then the nano-precursor is sintered in the air to effectively provide effective embedding and attachment sites for subsequent nickel plating; and after the nickel plating, the silica template is removed such that distributed mesopores are generated in situ on the precursor. The mesopores provide channels for the subsequent penetration of molten lithium into the interior of the precursor material. A final prepared material has a better ion and electron conduction structure compared with traditional granular materials. The present disclosure also discloses a material prepared by the method. The present disclosure also discloses an LIB including the high-performance modified LNMCO nickel 55 material.

Abstract: A ligand-coated doped lithium iron phosphate, wherein, a general formula of the ligand-coated doped lithium iron phosphate is LiFePO4@Mn-T-C/N, wherein T is at least one of zinc, nickel, copper, iron, cobalt, gallium, or chromium.

Abstract: A method for recycling and treating an electrolytic solution of a lithium ion battery includes S1: cooling a fully discharged lithium ion battery below a freezing point of the electrolytic solution, and then disassembling and crushing the lithium ion battery to obtain a crushed solid containing the electrolytic solution, S2: under a protection of an inert gas, placing the crushed solid in a supercritical CO2 extraction instrument in which an entrainer is added; S3: conducting extraction; and S4: collection an extraction product with a cryogenic device, and adsorbing water in the extraction product using a 4 ? type lithiated molecular sieve, adsorbing HF in the extraction product using weak-base anion-exchange resin and adsorbing organic acid and alcohol in the extraction product using a 5 ? type lithiated molecular sieve.

Abstract: The invention discloses A preparation method of polyrotaxane polymer electrolyte and its application, and belongs to the technical field of lithium ion batteries. The polyrotaxane polymer is composed of a linear polymer, a cyclic molecule and an end-capping molecule. The polyrotaxane polymer electrolyte is composed of a polyrotaxane polymer, a conductive lithium salt and a porous support material. The polymer electrolyte is simple in preparation process, free of byproducts and excellent in electrochemical performance. The room-temperature ionic conductivity can be greater than 10?3 Scm?1, and the electrochemical window can be greater than 5V (vs.Li+/Li); and the lithium metal battery assembled by the composite material has excellent cycle performance at room temperature. The interfacial compatibility of the polymer electrolyte and the electrode can be obviously improved, so that the electrochemical performance and the safety performance of the battery are improved.