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.

Abstract: Disclosed is a device and method for safe aluminum residue storage, including: a drying bin, where a side wall of the drying bin is provided with a first air inlet pipe and a first air outlet pipe, the first air inlet pipe is connected to a first drying blower, and the first air outlet pipe is connected sequentially to a deacidifier, a dehydrogenator, and a first exhaust fan along an airflow direction thereof; and a storage bin, where a feed inlet of the storage bin is connected to a discharge outlet of the drying bin through a screw conveyor, a side wall of the storage bin is provided with a second air inlet pipe and a second air outlet pipe, the second air inlet pipe is connected to a second drying blower, and an end of the second air inlet pipe can be connected to an inert gas bottle.

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.

Abstract: The invention discloses a preparation and application method of a high ionic conductivity polymer-based composite solid electrolyte, and belongs to the technical field of lithium-ion battery electrolytes. The organic-inorganic composite solid electrolyte is prepared by compounding a carbonate-based polymer, a conductive lithium salt, a porous support material, a functionalized silane coupling agent and an inorganic ion conductor material.

Abstract: A display panel and a display device are provided. An isolation structure includes a first isolation layer and a second isolation layer. In the second isolation layer, a minimum opening area of a second sub-opening is larger than a minimum opening area of a first sub-opening in the first isolation layer. Both the first light-emitting layer and the charge generation layer are interrupted at the isolation structure; the second electrode layer is continuously arranged at the isolation structure. An opening area of the first sub-opening on a side away from the substrate is greater than an opening area on a side close to the substrate.

Abstract: A fixing assembly includes a connecting sleeve, a spike member, and an elastic member; the spike member is rotatably connected to the connecting sleeve; one end of the elastic member is connected to the connecting sleeve, and the other end of the elastic member is connected to the spike member; the elastic member at least helically surrounds and abuts against the outer peripheral wall of the spike member, and the elastic member is configured to generate elastic deformation when the spike member rotates relative to the connecting sleeve along a direction opposite to the helical surrounding direction of the elastic member; there is an included angle between the direction of elastic deformation and the axial extension direction of the spike member to form a helical convex elastic structure.

Abstract: The present disclosure provides a method for preparing lithium iron phosphate and use thereof. The method comprises: adding a mixed solution of ferrous salt and ammonium dihydrogen phosphate, a citric acid solution and a pH adjusting agent in parallel into a first reactor for reaction, and simultaneously extracting the materials in the first reactor to a second reactor, and adding a copper salt solution and a sodium hydroxide solution to the second reactor for reaction, and refluxing the materials in the second reactor into the first reactor, mixing the solid material obtained in the reaction with a lithium source, and calcining the mixture in an ammonia gas stream to obtain lithium iron phosphate. This method can prepare a lithium iron phosphate precursor with a spherical structure, thereby improving the electrochemical performance of the subsequently prepared lithium iron phosphate material, which has a relatively high conductivity.

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 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.