Abstract: Disclosed are a method for removing elemental copper from ternary battery waste and its application. The method comprises the following steps: crushing and screening the ternary battery waste to obtain a powder, and then removing iron by magnetic separation to obtain an iron-removed ternary waste; Adding an alkaline solution to the iron-removed ternary waste to perform an aluminum removal reaction, filtering to obtain a filter slag and aluminum-containing wastewater, washing the filter slag with water and drying to obtain a copper-nickel-cobalt-manganese material. Adding an iron salt solution to the copper-nickel-containing material to perform a leaching process, filtering to obtain a leachate and a nickel-cobalt-manganese waste; adding iron powder to the leachate and stirring to perform a reaction, filtering to obtain a copper residue, washing the copper residue with water and drying to obtain a copper-removed liquid and a sponge copper.

Abstract: Disclosed is a method for efficiently removing fluorine from a spent lithium battery. The method comprises: mixing aluminum and a sodium hydroxide solution for reaction to obtain a sodium metaaluminate solution; introducing sulfuric acid into the sodium metaaluminate solution, and stirring to react at a certain temperature to obtain a fluorine removal agent; adding a sodium fluoroaluminate seed crystal and the fluorine removal agent into an impurity-removed battery powder leaching solution, introducing a sodium carbonate solution at the same time, performing reaction at a certain temperature, controlling the pH value of a reaction endpoint, and performing solid-liquid separation after the reaction is finished to obtain a fluorine-removed liquid and filter residues; and adding the sodium hydroxide solution into the filter residues for reaction, and performing solid-liquid separation to obtain a filtrate containing fluorine and aluminum, and insoluble residues.

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: Disclosed is a method for removing fluorine in a positive electrode leachate of lithium batteries, comprising: adding acid and an oxidizing agent to battery powder for leaching, and removing impurities from the obtained leachate to obtain a fluorine-containing solution; adding dawsonite to the fluorine-containing solution, and meanwhile adding sulfuric acid, stirring for reaction at a certain temperature, and performing solid-liquid separation to obtain fluorine-removed solution and filter residues; and washing the filter residues to obtain crude sodium hexafluoroaluminate. According to the present invention, the dawsonite is used for removing fluorine from waste lithium batteries, the dawsonite has good selectivity, does not react with nickel, cobalt, manganese, lithium and the like in the solution, and only reacts with fluorine ions in the solution, so that the purpose of selectively removing fluorine is achieved, and the loss of nickel, cobalt, manganese and lithium metals in the solution is avoided.

Abstract: A method for recycling valuable metal in a lithium battery positive plate is provided, comprising the following steps: S1, mixing a positive plate material with reducing metal, and then roasting, the roasting being carried out in a protective atmosphere; S2, performing magnetic separation on the material obtained in step S1 to obtain a magnetic component and a non-magnetic component; S3, performing acid dissolution on the magnetic component, concentrating the obtained leaching solution, and then performing cooling crystallization to obtain a metal salt A; and S4, performing water soaking on the non-magnetic component to obtain sediment and water soaking liquid, adding carbonate into the water soaking liquid to obtain lithium carbonate, performing acid dissolution on the sediment, purifying, and performing evaporative crystallization to obtain a dissolved solution to obtain a metal salt B.

Abstract: Disclosed is a preparation method for high-purity iron phosphate and use thereof, including: mixing and stirring an iron phosphide waste, an acid liquor, an oxidant, and an adsorbent, heating for leaching, and subjecting a resulting mixture to solid-liquid separation (SLS) to obtain a first filtrate and a first filter residue; adding an alkali liquor to the first filtrate to adjust a pH, holding a temperature of a resulting mixture, and subjecting the mixture to SLS to obtain a second filter residue and a second filtrate; and subjecting the second filter residue to a heat treatment to obtain iron oxide; subjecting the iron oxide to high-energy ball-milling, and adding a surfactant for activation to obtain a slurry; and mixing the slurry with phosphoric acid, heating to allow a reaction, subjecting a resulting mixture to SLS to obtain a solid, and washing and sintering the solid to obtain the iron phosphate.

Abstract: Disclosed are a method for selectively extracting lithium from a retired battery and an application of the method. According to the method, on the basis of an ion exchange effect between a divalent manganese ion and a lithium ion, a positive electrode material and a divalent manganese salt are mixed according to a certain proportion and prepared into a slurry, and the divalent manganese salt and the positive electrode material are fully mixed by means of a ball milling process, such that a lattice structure of the positive electrode material is effectively damaged, thereby reducing activation energy of exchange of the divalent manganese ion and the lithium ion and greatly reducing reaction energy required by a subsequence lithium extraction process.

Abstract: A method for recovering a positive electrode plate of a lithium battery is provided, including steps of: S1, reacting a material of the positive electrode plate with a metal salt in an aqueous solution, wherein the standard electrode potential of a metal in the metal salt is higher than that of aluminum; S2, dissolving and leaching a solid obtained in step S1 with a mixed solution of an acid and a reducing agent; and S3, defluorinating a leaching solution obtained in step S2, then extracting a transition metal in the defluorinated leaching solution, and precipitating and separating out lithium in a raffinate.

Abstract: Disclosed in the present invention are nano-meter sheet ferric phosphate, a preparation method therefor and the use thereof. The preparation method includes the following steps: dissolving a phosphorus source and an iron source in an acidic solution, adding an oxidant, and mixing same to obtain a solution containing phosphorus and iron; adding a precipitation auxiliary agent into part of the solution containing phosphorus and iron, heating same until boiling, and then diluting same for a reaction to obtain a primary ferric phosphate slurry; and dropwise adding the remaining solution containing phosphorus and iron into the primary ferric phosphate slurry, and then heating same for a reaction to obtain ferric phosphate. In the present invention, a primary ferric phosphate is prepared by means of a dilution precipitation reaction, and the precipitation auxiliary agent is then added for two-step precipitation to regulate the growth of the ferric phosphate.

Abstract: Disclosed is a method for efficiently removing fluorine from a spent lithium battery. The method comprises: mixing aluminum and a sodium hydroxide solution for reaction to obtain a sodium metaaluminate solution; introducing sulfuric acid into the sodium metaaluminate solution, and stirring to react at a certain temperature to obtain a fluorine removal agent; adding a sodium fluoroaluminate seed crystal and the fluorine removal agent into an impurity-removed battery powder leaching solution, introducing a sodium carbonate solution at the same time, performing reaction at a certain temperature, controlling the pH value of a reaction endpoint, and performing solid-liquid separation after the reaction is finished to obtain a fluorine-removed liquid and filter residues; and adding the sodium hydroxide solution into the filter residues for reaction, and performing solid-liquid separation to obtain a filtrate containing fluorine and aluminum, and insoluble residues.

Abstract: Disclosed are a method for selectively extracting lithium from a retired battery and an application of the method. According to the method, on the basis of an ion exchange effect between a divalent manganese ion and a lithium ion, a positive electrode material and a divalent manganese salt are mixed according to a certain proportion and prepared into a slurry, and the divalent manganese salt and the positive electrode material are fully mixed by means of a ball milling process, such that a lattice structure of the positive electrode material is effectively damaged, thereby reducing activation energy of exchange of the divalent manganese ion and the lithium ion and greatly reducing reaction energy required by a subsequence lithium extraction process.

Abstract: The present disclosure belongs to the technical field of battery recycling, and discloses a recycling method and use of lithium iron phosphate (LFP) waste. The method includes the following steps: mixing the LFP waste with water to prepare a slurry; adjusting a pH of the slurry to higher than 7.0 with an alkali, and heating to react; filtering a resulting mixture to obtain a filter residue; dissolving the filter residue in an acid, and filtering to obtain a filtrate; adding an oxalate-containing solution to react, and aging and filtering a resulting mixture to obtain a filter cake and a precipitation mother liquor; and subjecting the filter cake to slurrying, washing, and free water removal to obtain ferrous oxalate.

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 invention relates to the field of waste battery recycling, and discloses a method for treating waste diaphragm paper of a lithium battery, which includes the following steps of: (1) shearing and crushing waste diaphragm paper, and then carrying out pneumatic separation to obtain a light material and a copper-aluminum mixture; (2) putting the light material into a flotation machine for separation to obtain diaphragm paper and battery powder; and (3) pulping the battery powder, and then carrying out leaching of hydrometallurgy, pickling the diaphragm paper, and then filtering and spin-drying to obtain the diaphragm paper. According to the method, the diaphragm paper is treated by a method combining physics and chemistry, so that valuable metals in the waste diaphragm paper of the lithium battery are effectively recycled, and the industrial production requirements of environmental friendliness, low energy consumption and high resource recycling are satisfied.

Abstract: The invention belongs to the technical field of battery material recycling and discloses a regeneration method of waste ternary cathode materials and application thereof. The regeneration method comprises the following steps: drying, crushing, and sieving a waste ternary cathode material to obtain a cathode powder; adding the cathode powder to a alkali liquid, reacting, stirring, washing, and filtering to obtain a filter residue; drying the filter residue, then mixing with carbonized pitch, and performing reducing calcination to obtain a mixture; after testing the content of nickel, cobalt, manganese, aluminum, and lithium in the mixture, adding a nickel source, a cobalt source, a lithium source, a manganese source, polyethylene glycol, ball milling with water to obtain a suspension; spray granulating the suspension to obtain a ternary precursor; subjecting the precursor to two-stage calcination to obtain a regenerated ternary cathode material.

Abstract: Disclosed are a method for recovering lithium from lithium iron phosphate waste and application thereof. The method comprises the following steps: (1) adding water to lithium iron phosphate waste to obtain a lithium iron phosphate slurry (2) adding a soluble iron salt to the lithium iron phosphate slurry to perform a reaction, and filtering a resulting product to obtain an iron phosphate slag and a filtrate containing Li+ and Fe2+; (3) adding an oxidizing agent to the filtrate to perform a reaction and filtering a resulting product to obtain iron hydroxide and a filtrate containing Li+, Fe3+; (4) performing a multi-stage counter-current circulation leaching to the mixture of the filtrate and the lithium iron phosphate waste to obtain a lithium solution. The present disclosure adopts a soluble iron salt capable of accelerating the conversion of lithium iron phosphate.

Abstract: The present disclosure discloses a method for recycling lithium iron phosphate waste and its application. The method comprises the following steps: disassembling, crushing, and sieving the lithium iron phosphate waste to obtain a lithium iron phosphate powder; Diluting a ionic membrane liquid alkali, adding the lithium iron phosphate powder to the alkali, stirring under an oxidizing atmosphere in water bath to perform a reaction; filtering a resulting product to obtain a leachate and a lithium phosphate slag; drying the lithium phosphate slag, adding an ammonia aqueous solution to the slag to perform a reaction, filtering to obtain an ammonia aqueous solution containing lithium phosphate and a filter residue; the ammonia aqueous solution containing lithium phosphate is evaporated to obtain lithium phosphate. By adopting the present method of removing aluminum by alkaline leaching under an oxidizing atmosphere, the aluminum content in the obtained lithium iron phosphate slag is 0.08%.

Abstract: Disclosed are a method for removing elemental copper from ternary battery waste and its application. The method comprises the following steps: crushing and screening the ternary battery waste to obtain a powder, and then removing iron by magnetic separation to obtain an iron-removed ternary waste; Adding an alkaline solution to the iron-removed ternary waste to perform an aluminum removal reaction, filtering to obtain a filter slag and aluminum-containing wastewater, washing the filter slag with water and drying to obtain a copper-nickel-cobalt-manganese material. Adding an iron salt solution to the copper-nickel-containing material to perform a leaching process, filtering to obtain a leachate and a nickel-cobalt-manganese waste; adding iron powder to the leachate and stirring to perform a reaction, filtering to obtain a copper residue, washing the copper residue with water and drying to obtain a copper-removed liquid and a sponge copper.

Abstract: The present disclosure discloses a recycling method for a mixed waste material of lithium nickel manganese cobalt oxide (LNMCO) and lithium iron phosphate (LFP), including: conducting acid-leaching to obtain an acid-leaching liquor with nickel, cobalt, manganese, phosphorus, iron, and lithium; conducting adsorption separation with a resin, washing the resin with sulfuric acid to obtain a mixed solution of nickel sulfate, cobalt sulfate, and manganese sulfate, and subjecting the mixed solution to precipitation to obtain an LNMCO cathode material precursor; and subjecting an obtained solution with phosphorus, iron, and lithium to lithium precipitation to obtain a lithium salt precipitate, and subjecting a post-precipitation solution to concentration and electrospinning to obtain a ferric phosphate/carbon material. The process of the present disclosure can achieve comprehensive recycling of a mixed waste material of LNMCO and LFP and the directed circulation of waste LNMCO and LFP materials.

Abstract: This disclosure discloses a method for recovering lithium from a waste LFP material, including: S1. adding water to the waste LFP material, controlling a pH thereof at 0.5 to 2.0 and an ORP of the slurry at 0.05 V to 1.2 V, and filtering to obtain a material A; S2. adding sulfuric acid and heating a resulting mixture at 100° C. to 400° C. in the air or an oxygen atmosphere to obtain a material B; S3. adding water to the material B, and stirring and filtering to obtain a material C; S4. controlling a pH of the material C at 9 to 11, and filtering a resulting mixture to obtain a material D; S5. passing the material D through an ion-exchange resin to obtain a material E; and S6. adding the material E to a sodium carbonate solution to react; and collecting a resulting solid to obtain lithium carbonate.