Abstract: A method and device for defining a carbon emission accounting boundary for recycling of power batteries are provided. The method includes: setting an overall process flow range for the recycling of a decommissioned power battery; according to the overall process flow range, and in combination with an evaluation need corresponding to the carbon emissions accounting, generating a corresponding boundary; according to the boundary, outputting unit processes and an inventory structure corresponding to the recycling of the retired power battery.

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: A method for preparing a zinc manganate anode material is disclosed. The method includes the following steps: (1) preparing a solution A containing a manganese ion and a solution B containing zinc alkali; (2) dispersing an adsorption carrier into the solution B; (3) using an alkali solution as a base solution and adding the solution A, the solution B and an oxidant solution to the base solution while stirring; (4) conducting a solid-liquid separation of the materials after reaction to obtain a solid; and (5) washing, drying and calcining the solid to obtain a zinc manganate anode material.

Abstract: Disclosed in the present invention are a modified iron phosphate precursor, and modified lithium iron phosphate and a preparation method therefor. The modified iron phosphate precursor is prepared by dissolving a soluble ferric salt in a niobium diselenide suspension and then reacting with a phosphoric acid source. The modified iron phosphate precursor can effectively adsorb a lithium source, thereby significantly improving the conductivity of lithium iron phosphate.

Abstract: Provided are a template growth method for preparing a lithium cobaltate precursor and use. The method comprises: S1: mixing an aqueous ammonium metavanadate solution with a polyvinylpyrrolidone solution for hydrothermal reaction, and calcining the obtained precipitate under an aerobic atmosphere to obtain a vanadium pentoxide structure-directing agent, wherein the polyvinylpyrrolidone solution is prepared by dissolving polyvinylpyrrolidone in an alcohol; S2: adding the vanadium pentoxide structure-directing agent to a cobalt salt solution to obtain a turbid liquid, adding the turbid liquid, a carbonate solution, and a complexing agent in a parallel flow mode for reaction, and performing aging when the reaction material reaches a target particle size; and S3: performing solid-liquid separation on the aged material, and anaerobically calcining the obtained precipitate before aerobic calcination to obtain a lithium cobaltate precursor.

Abstract: Disclosed in the present invention are an NCA positive electrode material precursor having a core-shell structure, a method for preparing same, and use thereof. The precursor is a spherical or spheroid particle and consists of an outer shell and an inner core. The outer shell has a chemical general formula of NiaCobAlc(OH)2+c, wherein a+b+c=1, 0.45?a?0.55, 0.15?b?0.25, and 0.25?c?0.35; the inner core has a chemical general formula of NixCoyAlz(CO3)1?z(OH)3z, wherein x+y+z=1, 0.85?x<0.98, 0<y?0.15, and 0<z?0.15. The inner core has a porous structure. The inner core in the precursor of the present invention has a high nickel content and a porous structure, which can effectively buffer the volume change caused by subsequent charging and discharging of the NCA positive electrode material. The outer shell is a low-nickel material, which alleviates the volume change caused by the high nickel content.

Abstract: Disclosed in the present invention are a wastewater adsorbent, and a preparation method therefor and the use thereof. The method comprises: mixing a carbon black powder and an ammonium salt solution, heating same for a hydrothermal reaction, followed by filtering, and washing the obtained filter residues with acid to obtain an ammonium-salt-modified carbon black; mixing and grinding a nickel-cobalt-manganese mixed salt and a sodium salt to obtain a mixture, mixing the mixture with an organic acid solution, evaporating same to remove water, subjecting same to a heating reaction in an inert atmosphere, and subjecting the reacted material to acid pickling to obtain a nickel-cobalt-manganese-sodium mixed salt; and mixing the nickel-cobalt-manganese-sodium mixed salt, the ammonium-salt-modified carbon black and a binding agent, and compacting, drying and heating same to obtain a multimetal-carbon-based adsorbent.

Abstract: Disclosed is a stirring mechanism for extracting lithium from a waste liquid of a lithium iron phosphate battery, including a pedestal, a clamping jaw and a stirring mechanism; the stirring mechanism includes a first motor, a rotating member and a stirring member; the rotating member includes a second motor, a connecting end and a rotating shaft; the rotating shaft includes an inner shaft and an outer shaft; the stirring member includes a jaw-shaped connecting base, a separating frame, a material guide wheel and a collecting frame; the jaw-shaped connecting base is connected to an outside lower end of the outer shaft; the separating frame is connected to a bottom end of the jaw-shaped connecting base; the collecting frame is connected to a bottom portion of the separating frame; and the material guide wheel is fixed to a lower end of an inner cavity of the collecting frame and is connected with a bottom end of the inner shaft.

Abstract: The present disclosure discloses a porous and spherical cobalt oxide particle and a preparation method therefor. The preparation method includes the following steps: (1) mixing a cobalt salt solution, thiourea, and urea to obtain a mixed solution; (2) heating the mixed solution obtained in step (1) to allow a reaction in an aerobic atmosphere; (3) conducting solid-liquid separation (SLS) to obtain a solid product, and subjecting the solid product to calcination in an aerobic atmosphere to obtain a calcined material; and (4) washing and drying the calcined material obtained in step (3) to obtain the porous and spherical cobalt oxide particle. The cobalt oxide particle prepared by the preparation method has a larger specific surface area (SSA), which can significantly improve a specific capacity of a battery.

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: A layered sodium ion battery positive electrode material and a preparation method therefor. The chemical formula of the layered sodium ion battery positive electrode material is NaxMnO2-a(MO4)a, wherein 0<x?1, 0.01?a?0.2, and M is one or two of W and Mo. The preparation method comprises: preparing a manganese salt solution and a basic potassium permanganate solution mixed with an M element material, wherein the M element material is one or two of molybdate or tungstate; adding the basic potassium permanganate solution to the manganese salt solution, and potassium permanganate solution to the manganese salt solution, and after a reaction is finished, carrying out solid-liquid separation to obtain a solid material; and washing and drying the solid material, mixing the solid material with a sodium source, and then sintering same to obtain a layered sodium ion battery positive electrode material.

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: 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: Disclosed in the present invention are a magnetic aluminum-based adsorbent and a preparation method therefor. The preparation method comprises the following steps: mixing a carbon black slag powder, porous aluminum oxide and a polar solution, calcining same, then mixing the magnetic powder with a cross-linking agent, then injecting same into a forming mold for treatment and formation, then stripping same, and activating same, so as to obtain the magnetic aluminum-based adsorbent. The magnetic aluminum-based adsorbent prepared by the preparation method has a relatively high adsorption property and can adsorb low-concentration metal ions in wastewater generated by wet recovery of waste batteries well.

Abstract: The present application belongs to the technical field of battery materials, and discloses an aluminum-doped needle-like cobaltosic oxide and a preparation method therefor. The preparation method comprises the following steps: mixing a waste battery powder and an amino acid, adjusting the pH until an alkaline state is reached, and subjecting same to solid-liquid separation to obtain an aluminum-removed battery powder and a first filtrate; adding an acid to the aluminum-removed battery powder, mixing same, and subjecting same to solid-liquid separation to obtain a cobalt-containing acid solution and a copper-containing slag; adding, in a dropwise manner, a templating agent to the cobalt-containing acid solution, then adding an alkali to adjust the pH, centrifuging same, and subjecting same to a heat treatment to obtain an aluminum-doped needle-like cobaltosic oxide.

Abstract: Disclosed is a stirring mechanism for extracting lithium from a waste liquid of a lithium iron phosphate battery, including a pedestal, a clamping mechanism and a stirring mechanism; the clamping mechanism is movably connected to a bottom portion of the pedestal; the stirring mechanism is rotatably arranged between the pedestal and the clamping mechanism; the stirring mechanism includes a motor, a rotating member and a stirring member; the rotating member is rotatably arranged in a center of a fixed portion of the clamping mechanism, and the rotating member is obliquely arranged; the stirring member is detachably connected to a bottom portion of the rotating member; and the stirring member includes a connecting base, a separating hopper and a stirring wheel which are connected in sequence.

Abstract: The present disclosure discloses a method for recovering active material from waste battery by desorption, comprising steps of: reacting wound cores of cathode and anode current collectors of waste battery with carbon tetrachloride and chlorine to obtain remaining wound cores, a solution of aluminum chloride in carbon tetrachloride and a first desorption powder of cathode; soaking the remaining wound cores and the first desorption powder of cathode in water to obtain soaked wound cores, a lithium salt solution and a second desorption powder of cathode; and reacting the soaked wound cores with nitric acid to obtain a copper nitrate solution and a desorption powder of anode. The waste lithium-ion battery only needs to be discharged and disassembled, and no shredding process is required, which avoids steps of shredding and sorting, reduces equipment investment. In addition, cathode and anode materials can be effectively recovered, and the product has high economic value.

Abstract: Disclosed is a preparation method for a Prussian blue sodium-ion battery positive electrode material, comprising: adding a first nonionic surfactant and an antioxidant into a sodium ferrocyanide solution to obtain a first solution; adding a second nonionic surfactant into a transition metal salt solution to obtain a second solution; in a protective atmosphere, adding the second solution into the first solution for a precipitation reaction; aging after the reaction has finished; collecting a precipitate, washing same, and carrying out vacuum drying on the washed precipitate; then soaking same in an alcohol solution containing sodium alkoxide; and then filtering same and steam drying to obtain a Prussian blue sodium ion battery positive electrode material. The method may relieve vacuum drying pressure and shorten drying time.

Abstract: Disclosed is a stirring mechanism for extracting lithium from a waste liquid of a lithium iron phosphate battery, including a pedestal, a clamping jaw and a stirring mechanism; the stirring mechanism includes a first motor, a rotating member and a stirring member; the rotating member includes a second motor, a connecting end and a rotating shaft; the rotating shaft includes an inner shaft and an outer shaft; the stirring member includes a jaw-shaped connecting base, a separating frame, a material guide wheel and a collecting frame; the jaw-shaped connecting base is connected to an outside lower end of the outer shaft; the separating frame is connected to a bottom end of the jaw-shaped connecting base; the collecting frame is connected to a bottom portion of the separating frame; and the material guide wheel is fixed to a lower end of an inner cavity of the collecting frame and is connected with a bottom end of the inner shaft.

Abstract: Disclosed is a stirring mechanism for extracting lithium from a waste liquid of a lithium iron phosphate battery, including a pedestal, a clamping mechanism and a stirring mechanism; the clamping mechanism is movably connected to a bottom portion of the pedestal; the stirring mechanism is rotatably arranged between the pedestal and the clamping mechanism; the stirring mechanism includes a motor, a rotating member and a stirring member; the rotating member is rotatably arranged in a center of a fixed portion of the clamping mechanism, and the rotating member is obliquely arranged; the stirring member is detachably connected to a bottom portion of the rotating member; and the stirring member includes a connecting base, a separating hopper and a stirring wheel which are connected in sequence.