Abstract: Disclosed are a copper-doped lithium cobalt oxide precursor, a cathode material, a preparation method therefor and use thereof. The method comprises the following steps: (1) mixing a solution of soluble cobalt salt and copper salt, urea and a carbon source to perform a hydrothermal reaction to obtain a mixture; and (2) subjecting the mixture obtained in step (1) to solid-liquid separation, washing and drying the obtained solid product to obtain the copper-doped lithium cobalt oxide precursor. The cathode material prepared by the copper-doped lithium cobalt oxide precursor has better cycle performance and discharge capacity.

Abstract: Disclosed is a dust-proof safe feeding device for power battery black powder acid leaching feeding, including a leaching tank, a blanking grid and a material shaking assembly, where the leaching tank includes a feeding port; the blanking grid is mounted in the feeding port, and the blanking grid is provided with a blanking hole; the material shaking assembly includes a material shaking member and a driving device, the material shaking member is movably arranged in the blanking hole, the driving device is connected with the material shaking member, and the driving device is configured to drive the material shaking member to move in the blanking hole.

Abstract: Disclosed herein are a ternary precursor with a high tap density and a method for preparing same. The method comprises the following steps: (1) adding a silicon dioxide emulsion into an alkaline substrate solution to give a mixed solution; (2) adding a mixed nickel-cobalt-manganese salt solution, a precipitant, a complexing agent, and a surfactant; (3) conducting solid-liquid separation to give a solid material, and drying and crushing to give a crushed material; (4) mixing the crushed material with the alkaline substrate solution and the surfactant; (5) repeating step (2); and (6) conducting solid-liquid separation to give a solid material, and washing and drying the solid material to give the ternary precursor with a high tap density. The precursor particle prepared according to the method has a higher tap density, and can provide excellent cycle performance for the positive electrode material.

Abstract: Disclosed is a preparation method for ammonium manganese iron phosphate. The preparation method comprises: respectively mixing a mixed salt solution of metals and an ammonium dihydrogen phosphate solution with an organic solution to obtain a mixed liquor of metal salts and a mixed liquor of phosphate; concurrently adding the mixed liquor of metal salts, the mixed liquor of phosphate and a first ammonia water into a base solution for reaction; and carrying out solid-liquid separation to obtain ammonium manganese iron phosphate. A mixed metal salt solution of a ferrous source and a manganese source and a phosphorus source are subjected to a coprecipitation reaction in an organic phase, to synthesize large-particle ammonium manganese iron phosphate with high compaction density. After the ammonium manganese iron phosphate is mixed with a lithium source and a carbon source, sintering can be carried out to prepare a lithium manganese iron phosphate cathode material.

Abstract: The present disclosure discloses a porous iron phosphate and a preparation method thereof. The preparation method includes the following steps: (1) mixing a phosphorus-iron solution with an aluminum-containing alkaline solution to allow a co-precipitation reaction; (2) subjecting a reaction system obtained in step (1) to solid-liquid separation (SLS) to obtain a precipitate; (3) subjecting the precipitate obtained in step (2) to a reaction with phosphine under heating; (4) after the reaction is completed, cooling a product obtained in step (3), and soaking the product in a weak acid solution; and (5) subjecting a system obtained in step (4) to SLS to obtain a solid, and subjecting the solid to aerobic calcination to obtain the porous iron phosphate.

Abstract: The present disclosure discloses a method for coating a lithium nickel cobalt manganese oxide cathode material, and relates to the technical field of the synthesis of cathode materials. The present disclosure provides a method for coating a lithium nickel cobalt manganese oxide cathode material, comprising the following steps: (1) mixing the lithium nickel cobalt manganese oxide cathode material with a potassium permanganate solution, and introducing an olefin; and (2) after a reaction is completed, a reaction product is dried and calcinated to obtain a manganese-dioxide-coated lithium nickel cobalt manganese oxide cathode material; wherein the number of carbon atoms in the olefin is ?10, and the number of carbon-carbon double bonds in the olefin is 1. By introducing an olefin when mixing a lithium nickel cobalt manganese oxide cathode material with a potassium permanganate solution, directed coating of surface defects is realized.

Abstract: Disclosed is a method and device for screening an echelon-use battery. The method includes: collecting a first initial voltage and a first voltage change data of a standard battery of the same batch as a test battery; acquiring a first voltage difference data; acquiring an allowable echelon-use voltage difference range corresponding to the first initial voltage according to the first initial voltage, the first voltage difference data and an allowable echelon-use deviation; collecting a second initial voltage and a second voltage change of the test battery, acquiring a second voltage difference data, when the second initial voltage and the first initial voltage are the same, determining whether the second voltage difference data falls within the allowable echelon-use voltage difference range, the test battery is qualified if the second voltage difference data falls into the range.

Abstract: Provided are a single-crystal ternary cathode material and a preparation method therefor and application thereof. The chemical formula of the single-crystal ternary cathode material is LiNixCoyMnzM(1-x-y-z)Oc@LiaNdOb, wherein 0<x?0.65, 0<y?0.15, 0<z?0.35, 0<a?6, 0<b?4, 1<c?2 and 1?d<2; and M and N are at least one of Zr, Ni, Al, Cu, Co, Sr, Mn, Y, Ti, Mg, Mo, B, Sn, Fe, Zn, Si and W. The single-crystal ternary cathode material is a single-crystal material of a core-shell structure.

Abstract: The present application belongs to the technical field of battery materials. Disclosed are a doped iron (III) phosphate, a method for preparing same, and use thereof. The chemical formula of the doped iron (III) phosphate is (MnxFe1?x)@FePO4·2H2O, wherein 0<x<1. According to the present application, ferromanganese phosphate is used as a template agent for preparing the doped iron (III) phosphate. The doped iron (III) phosphate is regular in morphology and good in fluidity, facilitates washing and conveying, and can improve the electrochemical performance of the subsequently prepared LiFePO4/C. When the doping amount of Mn is 11000 ppm, the specific discharge capacity of LiFePO4/C at room temperature at 0.1 C rate can reach 165 mAh/g; the retention rate of the discharge capacity of 1000 cycles at 45° C. at 1 C rate can reach 97.4%; and at a low temperature of ?15° C. the specific discharge capacity at 0.1 C rate is still 134 mAh/g.

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 application provides a preparation method for a positive electrode material precursor having a large channel, and an application thereof. The method comprises: mixing a sodium hexanitrocobaltate aqueous solution, a nickel-manganese mixed salt solution, an oxalic acid solution, and aqueous ammonia for reaction; calcining a solid material; and soaking the calcined material in water to obtain a positive electrode material precursor having a large channel. According to the present application, nickel-cobalt-manganese and sodium-ammonium are co-precipitated and sintered, and then sodium-ammonium is removed; and since the radius of sodium ions is greater than the radius of lithium ions, a large ion channel is left in a nickel-cobalt-manganese precursor framework, thereby facilitating the deintercalation of the lithium ions of a chemically sintered positive electrode material, widening a lithium ion diffusion channel, and remarkably improving the rate capability and the cycle performance of the material.

Abstract: An ultrasonic vibrating screen includes a bottom frame, at least two screen cylinders, and a vibrating mechanism. An elastic body is provided on the bottom frame; the screen cylinders are arranged in sequence from bottom to top, each screen cylinder is provided with a screen, and one of the screen cylinders is connected with the bottom frame through the elastic body. The vibrating mechanism includes a vibrating frame and at least two ultrasonic transducers, the screen cylinders are all fixed to the vibrating frame, the ultrasonic transducers are fixed to the vibrating frame, and the ultrasonic transducers drive the vibrating frame to vibrate. By fixing all the screen cylinders with the vibrating frame, the amplitudes and frequencies of all ultrasonic transducers which are originally unsynchronized are unified to be the same amplitude and the same frequency as much as possible.

Abstract: Disclosed is a processing device for a lithium battery positive electrode material, including a base, where the base is fixedly provided with barrel bodies by means of a support, a sleeve is rotatably clamped between the two barrel bodies, a stirring assembly transversely penetrates through interiors of the barrel bodies and the sleeve, the base is further provided with a power mechanism, and the power mechanism separately drives the sleeve and the stirring assembly to rotate. Due to the cooperation of the barrel bodies, the sleeve and the stirring assembly, the stirring assembly can effectively scrape attachments on the inner walls of the barrel bodies, and a first stirring blade in the sleeve and a second stirring blade in the stirring assembly are cooperated to stir, gather and further disperse and disarrange the material, such that the material can be mixed more uniformly.

Abstract: The present disclosure discloses a method for recycling a lithium-ion battery electrolyte. After the waste lithium-ion battery is discharged, it is frozen and disassembled to obtain a battery cell containing an electrolyte. The battery cell is immersed in a lithium hydroxide solution containing a catalyst for reaction. The battery cell after the reaction is taken out and washed. The washing solution is mixed with the lithium hydroxide solution after the reaction to obtain a mixed solution. The mixed solution is filtered to obtain a filtrate and a filter residue. The filter residue is reacted with a hydrofluoric acid solution to obtain anhydrous lithium salt. The anhydrous lithium salt is mixed with an organic solution, and PF5 gas is introduced. The mixture is reacted, and filtered to obtain an organic liquid. The organic solution is frozen and filtered to obtain lithium hexafluorophosphate.

Abstract: The present disclosure discloses a method for preparing a ternary cathode precursor material with low sulfur content and high specific surface area, and belongs to the field of lithium ion battery materials. In the present disclosure, by using a continuous filter with a spraying device for concentrating a reaction material, sulfur impurities can be uniformly removed in a reaction stage, and neither are the reaction environment and the production efficiency affected, nor does introduction of new impurities occur. In addition, by removing the mother liquor by means of negative pressure suction filtration, the material can be oxidized uniformly in a controlled manner, and the specific surface area of the ternary cathode precursor material is uniformly increased, so that during sintering, lithium ions more easily enter the interior of particles of the ternary cathode precursor material, thus exerting a higher capacity.

Abstract: Disclosed is an underwater crushing mechanism for an aluminum housing battery, including a crusher, where the top end of the crusher is provided with a feed port, and a crushing mechanism is arranged inside the crusher below the feed port; a water body is stored in an inner cavity of the crusher, and the crushing mechanism is immersed in the water body; the crusher is provided with a spray mechanism; the crusher at the side of the spray mechanism away from the feed port is provided with a channel communicated with the inner cavity of the crusher, an opening is provided at the side of the channel away from the spray mechanism, and at least two crushed material collection chambers are arranged in the crusher at the side of the opening; and a collection frame is movably arranged in the channel.

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 present application discloses a method for preparing ferric phosphate, including the following steps: mixing a surfactant with a first metal liquid containing iron and phosphorus elements, adding with adding seed crystal, aging under heating and stirring, filtering the aged solution to obtain a filter residue, and drying and sintering the filter residue, thereby obtaining the ferric phosphate; the seed crystal is ferric phosphate dihydrate or basic ammonium ferric phosphate. In the present application, the surfactant is used for modification of the seed crystal, secondary crystal nucleus is generated, which induces the formation of the basic framework of the product particles. Through the aging process, the deposition of the crystal nucleus on the surface of the seed crystal makes the framework of the crystal grain more complete, so that the primary particles are arranged more densely and orderly and tend to constitute spherical secondary particles.

Abstract: A high-voltage ternary positive electrode material includes ternary positive electrode active material particles and a flexible coating body, the flexible coating body being coated on surfaces of the ternary positive electrode active material particles; wherein, the flexible coating body includes a mixture of polyaniline and a polyurethane elastomer.

Abstract: Disclosed is an apparatus for efficiently pretreating and recycling a waste battery, which includes a bottom plate, a recycling device, a conveying device and a treatment device, and one end of a top portion of the bottom plate is fixedly mounted with a bottom portion of the conveying device. According to the invention, by arranging a fixing assembly and the recycling device, a suction pump can suck a slurry and an electrolyte in a battery downwardly for dropping, and a driving assembly can rapidly convey the slurry and the electrolyte in the battery to the treatment device for treatment at the same time.