Abstract: A disassembling and discharging device for battery recycling includes a crushing assembly, a high pressure tank, at least one pressure relief tank, and a filtering tank. The crushing assembly is provided with a first feed port and a first discharge port communicated with the first feed port; the high pressure tank is provided with a first inner cavity for containing discharging liquid, and the first inner cavity is communicated with the first discharge port; the pressure relief tank is provided with a second inner cavity, and the second inner cavity is communicated with the first inner cavity; and the filtering tank is provided with a third inner cavity, and the third inner cavity is communicated with the second inner cavity.

Abstract: The present disclosure discloses a device for cutting connection of multi-piece module electrode which includes a stand, the stand is provided with a workbench and the workbench is connected with a height adjusting device. The device further includes an angle grinding device, the angle grinding device includes a polishing shaft and an angle grinder, the angle grinder is arranged on the polishing shaft, and the angle grinding device is provided with a saw blade. According to the characteristics of the module electrode, the angle grinding device is matched with the workbench to implement simultaneous electrode disconnecting operation of multiple electrodes of the module, so that the device not only has higher efficiency and better cutting effect, but also is suitable for universal saw blades, saves the cost, and is safer.

Abstract: The invention belongs to the field of battery material recovery, and discloses a preparation method and application of heterosite phosphate. The method comprises the following steps: mixing lithium iron phosphate with a solvent, adding an acid solution, and adjusting the pH to obtain an acidic lithium iron phosphate liquid; adding a transition metal additive to the acidic lithium iron phosphate liquid, and performing leaching in an intensifying micro-environment, followed by filtrating to obtain heterosite iron phosphate and a lithium-rich solution. The leaching rate of lithium in the leaching solution reaches 90.5-99.9%, and both of the iron and phosphorus content in the leaching solution are less than 0.1 ppm; the recovered heterosite iron phosphate has a purity of 99.9%, and the recovery rate of the heterosite iron phosphate is 99.3%.

Abstract: A method for preparing a refractory material from waste battery residues. The method comprises the following steps: (1) disassembling waste batteries, then sorting same to obtain positive and negative electrode powders, leaching the positive and negative electrode powders with an acid, filtering same to obtain a graphite slag, and then subjecting the filtrate to copper removal, followed by the addition of an alkali for a precipitation reaction, wherein the resulting precipitate is an iron-aluminum slag; (2) wrapping the graphite slag obtained in step (1) with wet clay to form an inner core material, then mixing wet clay with the iron-aluminum slag, wrapping the inner core material with same, and aging the wrapped inner core material to obtain a blank; (3) pre-sintering, calcining and cooling the blank prepared in step (2) to obtain a fired product; and (4) washing and drying the fired product to obtain the refractory material.

Abstract: Disclosed are a preparation method of a carbon dioxide capture agent and an application thereof. The method includes: mixing a graphite dispersion, an organic acid solution, a metal salt solution and a silica sol to obtain an organic-inorganic composite gel; standing and aging the organic-inorganic composite gel, drying the same and then carbonizing the same by microwave in a mixed atmosphere of inert gas and sulfur dioxide to obtain an intermediate product; and subjecting the intermediate product to acid washing or alkali washing to obtain a defective carrier, then mixing the defective carrier with an amine substance for ultrasonic treatment and drying to obtain the carbon dioxide capture agent.

Abstract: The present invention provides a method for directly preparing nickel sulfate from low nickel matte, a nickel sulfate and an application thereof, the method comprising the following steps: a) pre-treating a low nickel matte to obtain ferronickel powder; b) mixing the ferronickel powder with a sulfuric acid solution, stirring, dissolving, and then evaporating, to obtain a supersaturated sulfate solution; c) cooling the supersaturated sulfate solution to ?5° C.-0° C., and performing suction filtration to obtain an insoluble solid; d) washing the insoluble solid with water, and removing impurities from the filtrate to obtain a nickel hydroxide precipitate; impurity removal comprising successively removing iron, and removing calcium and magnesium; e) washing the nickel hydroxide precipitate with water, acid-dissolving and evaporating to obtain nickel sulfate. The present invention increases the amount of nickel recovered, the purity of nickel sulfate being 18.10%-19.24% nickel, and the recovery rate being 94.

Abstract: A method for recovering lithium battery slurry, the method comprising: pretreating lithium battery slurry, and then subjecting the pretreated lithium battery slurry to centrifugal spray drying to separate a solid phase and a solvent. A device for the recovery of lithium battery slurry is a centrifugal spray drying system, and comprises a spray chamber (100), a cyclone separator (200), a condenser (400), a condensate storage tank (500), and a rectification tower (600); the system improves upon original centrifugal spray drying devices, and is designed to combine the processes of centrifugal spray drying and NMP condensation recovery, such that NMP can be directly recovered after separation of positive electrode material and the NMP.

Abstract: A doped sodium vanadium phosphate and a preparation method and application thereof. Preparation steps of a nitrogen-doped peony-shaped molybdenum oxide in raw materials of the doped sodium vanadium phosphate are as follows: adding a regulator into a molybdenum-containing solution for reaction, concentrating and thermal treatment to obtain a peony-shaped molybdenum oxide; and dissolving the peony-shaped molybdenum oxide in a conditioning agent, and adding an amine source for standing, centrifuging, washing and heat treatment, thus obtaining the nitrogen-doped peony-shaped molybdenum oxide.

Abstract: A method for preparing nano iron phosphate with low sulfur content. The method may include: S1: mixing a phosphorus source and an iron source to obtain a raw material solution, then adding alkali and a surfactant, adjusting a pH, and stirring and reacting to obtain an iron phosphate dihydrate slurry, S2: adding phosphoric acid solution into the iron phosphate dihydrate slurry, adjusting the pH, heating and stirring for aging, and filtering to obtain iron phosphate dihydrate, S3: adding water into the iron phosphate dihydrate for slurrying, and grinding to obtain a ground slurry; and S4: adding the ground slurry into a washing solution to wash, carrying out solid-liquid separation, and calcining a solid phase to obtain the nano iron phosphate with low sulfur content.

Abstract: The present disclosure discloses a method for preparing nickel sulfate from ferronickel, including: S1: in a high-pressure oxygen environment, mixing crushed ferronickel with sulfuric acid, introducing a carbon monoxide gas to allow a reaction, and conducting solid-liquid separation (SLS) to obtain a filtrate and a filter residue; S2: adding an oxidizing agent and a precipitating agent successively to the filtrate, controlling a pH of the filtrate, and conducting SLS to obtain a nickel-containing filtrate and an iron hydroxide precipitate; and S3: subjecting the nickel-containing filtrate to extraction and back-extraction to obtain a nickel sulfate solution. In the present disclosure, the carbon monoxide gas is introduced under high-pressure acidic conditions to first react with nickel and iron to form nickel tetracarbonyl and iron pentacarbonyl, and the nickel tetracarbonyl and iron pentacarbonyl are oxidized by oxygen and then smoothly react with sulfuric acid to form nickel sulfate and iron sulfate.

Abstract: The invention discloses a vacuum cracking apparatus for a power battery and a cracking method thereof. The cracking device includes a cylinder and further includes a rolling device, a first sealing device, a cracking device, a second sealing device, a pyrolysis device and a third sealing device which are arranged from top to bottom. The cracking device for the power battery of the present invention is equipped with the first sealing device, the second sealing device and the third sealing device to isolate the cracking device from the pyrolysis device and be capable of realizing material transmission and gas isolation without interference with each other, so that gas stirring between an anaerobic zone and an aerobic zone is avoided; and by combing battery cracking and battery pyrolysis, with cracked gas discharged after cracking as a fuel for cracking and pyrolysis or preheating a pyrolysis device, resources are fully used.

Abstract: Disclosed are a wet sorting process for a waste lithium battery and application thereof, which belong to the field of battery material recycling. The wet sorting process includes the following steps of carrying out wet ball milling on a sorting material of a waste lithium battery to obtain a ball-milled product, screening the ball-milled product to obtain a coarse-grained screened material, a medium-grained screened material and a fine-grained screened material, carrying out wet ball milling, screening, magnetic separation and table concentration on the medium-grained screened material to obtain copper, aluminum and a steel shell, and carrying out flotation, magnetic separation and table concentration on the fine-grained screened material to obtain cathode material powder, graphite, copper and aluminum.

Abstract: The present disclosure belongs to the technical field of battery materials, and discloses a silicon/carbon composite anode material, and a preparation method and use thereof. The preparation method includes the following steps: S1. dissolving a graphite anode powder in an acid solution, and conducting solid-liquid separation (SLS) to obtain a precipitate; and washing and drying the precipitate, adding a reducing agent, and subjecting a resulting mixture to heat treatment to obtain a purified graphite material; and S2. mixing a modified silicon powder with the graphite material, adding a resulting mixture to a polyimide (PI)-containing N,N-dimethylformamide (DMF) solution, and stirring; and subjecting a resulting mixture to distillation and then to carbonization to obtain the silicon/carbon composite anode material.

Abstract: A vacuum cracking method and a cracking apparatus for a power battery are disclosed. The vacuum cracking method includes the following steps that: waste power batteries are fed from a feed hopper and then enter a rolling unit for rolling treatment to obtain a crushed material; the crushed material is transported to a cracking unit for preheating, then heated and cracked under an inert atmosphere or vacuum to obtain cracked gas, solid cracked products and non-crackable products; and the solid cracked products and the non-crackable products are transported to a pyrolysis unit for pyrolysis at an aerobic atmosphere to obtain pyrolysis gas and non-pyrolysis products.

Abstract: The present disclosure discloses a device for cutting connection of multi-piece module electrode which includes a stand, the stand is provided with a workbench and the workbench is connected with a height adjusting device. The device further includes an angle grinding device, the angle grinding device includes a polishing shaft and an angle grinder, the angle grinder is arranged on the polishing shaft, and the angle grinding device is provided with a saw blade. According to the characteristics of the module electrode, the angle grinding device is matched with the workbench to implement simultaneous electrode disconnecting operation of multiple electrodes of the module, so that the device not only has higher efficiency and better cutting effect, but also is suitable for universal saw blades, saves the cost, and is safer.

Abstract: The invention belongs to the field of an electrolyte solution for a battery, and discloses a lithium-sulfur battery electrolyte and a preparation method and application thereof. The electrolyte solution comprises the following components: an organic solvent, an electrolyte and an additive; the organic solvent is 1,1,2, 2-tetrafluoroethyl 2,2,3,3-tetrafluoropropyl ether and 1,3-dioxolane; the electrolyte is bis(hexafluoroethane) sulfonamide lithium salt and LiCF3SO3; the additive is a lithium-sulfur compound, wherein the lithium-sulfur compound is Li6S2. The invention recovers an electrolyte solution from a lithium-sulfur battery, and then extracts the Li element in the electrolyte solution, which is recycled for preparation of a electrolyte solution of the lithium-sulfur battery; in addition, it can also enrich the organic components in the electrolyte solution of the waste lithium-sulfur battery, facilitating a centralized processing and reduction of leakage pollution.

Abstract: Disclosed are a method for preparing lithium nickel cobalt manganese oxide by reverse positioning of a power battery and use thereof. The method first mixes and grinds a positive electrode tab and a slagging agent, then dries, cools, adds an aluminum powder, mixes well, conducts a self-propagating reaction to the mixed material, cools, takes a lower layer of rough nickel cobalt manganese alloy, grinds the rough nickel cobalt manganese alloy, adds an alkali liquor, then immerses, filters, takes the filter residue for washing and then dries, to obtain a nickel cobalt manganese alloy powder, adds a lithium salt solution to the porous nickel cobalt manganese alloy powder, mixes and drips an alkali liquor, ages, filters, takes a filter residue for washing and then dries, to obtain a mixed powder of precursor, sinters the mixed powder of precursor and cools, to obtain a lithium nickel cobalt manganese oxide.

Abstract: Disclosed are a silicon-doped graphene composite material and a preparation method and application thereof. The silicon-doped graphene composite material comprises silicon and graphene; the silicon is doped in the graphene. The silicon-doped graphene composite material of the present disclosure has excellent charge and discharge capacity and structural stability; the silicon-doped graphene composite material is based on the graphene structure, with silicon atoms replacing the carbon atoms in a two-dimensional network structure of the graphene. The silicon-doped graphene composite material of the present disclosure has a layered structure similar to graphite materials, but is superior to other graphene materials in charge and discharge capacity, which is due to the fact that lithium intercalation sites are constructed by the silicon doped sites.

Abstract: Disclosed are a method for preparing lithium nickle cobalt manganese oxide by reverse positioning of a power battery and use thereof. The method first mixes and grinds a positive electrode tab and a slagging agent, then dries, cools, adds an aluminum powder, mixes well, conducts a self-propagating reaction to the mixed material, cools, takes a lower layer of rough nickel cobalt manganese alloy, grinds the rough nickel cobalt manganese alloy, adds an alkali liquor, then immerses, filters, takes the filter residue for washing and then dries, to obtain a nickel cobalt manganese alloy powder, adds a lithium salt solution to the porous nickel cobalt manganese alloy powder, mixes and drips an alkali liquor, ages, filters, takes a filter residue for washing and then dries, to obtain a mixed powder of precursor, sinters the mixed powder of precursor and cools, to obtain a lithium nickle cobalt manganese oxide.

Abstract: Disclosed are a wet sorting process for a waste lithium battery and application thereof, which belong to the field of battery material recycling. The wet sorting process includes the following steps of: carrying out wet ball milling on a sorting material of a waste lithium battery to obtain a ball-milled product screening the ball-milled product to obtain a coarse-grained screened material, a medium-grained screened material and a fine-grained screened material, carrying out wet ball milling, screening, magnetic separation and table concentration on the medium-grained screened material to obtain copper, aluminum and a steel shell and carrying out flotation, magnetic separation and table concentration on the fine-grained screened material to obtain cathode material powder, graphite, copper and aluminum.