202results about "Lithium halides" patented technology

The invention provides a lithium ion battery negative electrode material as well as a preparation method and application thereof. The lithium ion battery negative electrode material is a porous silicon carbon material coated with lithium phosphate. The preparation method is simple and efficient, lithium phosphate salt is uniformly distributed on the surface of the porous silicon carbon material through solvent wet coating, the lithium phosphate salt is decomposed into LiF and LixPyOz through sintering and heating, and LiF and LixPyOz coating layers are generated in situ on the surface of the porous silicon carbon negative electrode material of the lithium ion battery, so that the porous silicon carbon material uniformly coated with LiF and LixPyOz is obtained, the advantages of LiF and LixPyOz are combined, and the porous silicon carbon material has the advantages that the porous silicon carbon material can be used for preparing the lithium ion battery negative electrode material through cooperation of LiF and LixPyOz; the silicon-carbon material prepared by the method has the characteristics of high strength, high stability and high ionic conductivity, can effectively inhibit volume expansion of the silicon-carbon material in the charge-discharge process, block penetration of electrons and reduce capacity loss of the silicon-carbon material in the reaction process, is used for manufacturing a lithium ion battery and remarkably improves the cycling stability of the battery.

The invention pertains to a recycling process of a material comprising a halide solid electrolyte (HSE) of formula (I) M3-z(Mek+)fX3-z+k*f, said process comprising successively: a) adding at least one ammonium salt of X' to a solution comprising the HSE, wherein X and X' are halogens, in particular independently chosen from Cl, Br, I and any combination thereof; b) filtering and evaporating the solution obtained in step a) to obtain a dry powder; c) heating the dry powder obtained in step b), and d) obtaining a recycled HSE of formula (I). The invention further concerns a cathode composite and an electrolyte comprising a recycled HSE obtained from the recycling process according to the invention and an all-solid-state battery comprising such a cathode composite and / or electrolyte.

The present invention relates to a method for improving the yield of a lithium solution through concentration and crystallization, and, more specifically, to improving the yield of a lithium solution by reacting a low-concentration lithium solution with a fluorine compound so as to prepare lithium fluoride, and then concentrating and crystallizing a filtrate.

The invention provides spodumene impurity residue removal lithium extraction equipment and a lithium chloride and magnesium oxide preparation process, and relates to the technical field of solid waste treatment, the spodumene impurity residue removal lithium extraction equipment comprises a water bath extraction box, a first mounting plate, a second mounting plate, a reciprocating mechanism and a stirring mechanism; a first mounting plate and a second mounting plate are respectively mounted at the top of the water bath extraction box, the reciprocating mechanism comprises a motor mounted at the top of the first mounting plate, an output shaft key slot of the motor is connected with a turntable, and a limiting frame is fixedly arranged at the bottom of the first mounting plate. According to the scheme, the reciprocating mechanism is matched with the stirring mechanism to rotate in a reciprocating manner, so that the lithium dissolution and separation rate can be increased, a local dead zone formed by single stirring can be broken through the compound motion of reciprocating rotation and stirring, a lithium-containing filtrate forms a strong turbulence and shear effect in the water bath extraction box, updating of a surface leaching agent can be accelerated, and the extraction efficiency is improved. The diffusion resistance of lithium ions on a solid-liquid interface is reduced, so that the dissolution rate of lithium from a solid state to a solution is remarkably increased, and the overall extraction period is shortened.

Lithium oxide argyrodites having the formula Li(6−y)PS4O(1−y)X(1+y) where X is a halide anion and y is a number between 0 and 0.8, inclusive, are provided herein. Also provided are methods of synthesizing the lithium oxide argyrodites and composites including the lithium oxide argyrodites, as well as other alkali metal oxide argyrodites and related methods and composites.

Disclosed are sorbent compositions for direct lithium extraction (DLE). The sorbent compositions include a lithiated aluminum component and an inorganic binder, and are in the form of shaped particles. The lithiated aluminum component makes up about 50% w / w to about 90% w / w of the sorbent compositions, whereas the binder makes up about 10% w / w to about 50% w / w of the sorbent compositions. Processes for producing the sorbent compositions are also provided, as are methods of using the sorbent compositions for DLE.

The invention discloses a bifunctional ionic liquid as well as a preparation method and application thereof, and belongs to the technical field of lithium resource extraction and hydrometallurgy. According to the invention, the dual-functional ionic liquid is prepared, and the dual-functional ionic liquid can be used for synchronously realizing efficient extraction of lithium ions from the lepidolite acid leaching solution and synergic deep removal of fluorine and chlorine, so that the limitation and defects of a traditional solvent extraction agent are effectively overcome; the problems that an existing lepidolite lithium extraction technology is long in process, low in separation efficiency and serious in equipment corrosion can be solved.

The application discloses a pyrite-based composite positive electrode material, a preparation method thereof and application of the pyrite-based composite positive electrode material in a full-solid-state battery, and relates to the technical field of battery materials. The preparation method of the pyrite-based composite positive electrode material comprises the following steps: (1) performing shock ball milling treatment on pyrite block crystals to obtain iron sulfide powder; (2) mixing lithium sulfide and lithium iodide, and then performing high-energy ball milling treatment to obtain a lithium iodine sulfur amorphous mixture; and (3) mixing the iron sulfide powder and the lithium iodine sulfur amorphous mixture, and then performing high-energy ball milling treatment to obtain the pyrite-based composite positive electrode material. The pyrite-based composite positive electrode material is combined with a solid electrolyte membrane and a lithium indium negative electrode, and a pyrite composite positive electrode sulfide full-solid-state battery with high capacity and low attenuation can be prepared, and the pyrite composite positive electrode sulfide full-solid-state battery exhibits high specific capacity and long cycle performance.

This invention relates to the field of lithium extraction from lithium precipitated mother liquor, and provides a method for preparing battery-grade lithium chloride from lithium precipitated mother liquor, comprising: S1 cooling the lithium precipitated mother liquor and then performing precision filtration to remove solid particles; S2 adding a crown ether additive to the lithium precipitated mother liquor after filtration in step S1 to obtain a pretreated mother liquor; S3 performing multi-stage extraction on the pretreated mother liquor using a lithium extractant to obtain a loaded organic phase; S4 first performing multi-stage washing on the loaded organic phase with a mixed washing liquid, and then back-extracting to obtain a lithium chloride solution; S5 sequentially subjecting the lithium chloride solution to resin adsorption for oil removal and evaporation crystallization to obtain a battery-grade lithium chloride product. This method reduces sodium activity from the source by adding a crown ether additive in the extraction stage to reduce sodium co-extraction, and simultaneously adds a sodium replacement additive in the washing stage to chemically complex residual sodium ions to improve the efficiency of single-stage washing, thereby reducing the number of extraction stages and washing stages, significantly reducing equipment investment and operating costs compared to traditional processes.

The invention belongs to the technical field of lithium salt purification, and discloses a lithium extraction method and a lithium extraction device. The method comprises the following steps: providing a lithium-containing mixed salt; contacting the lithium-containing mixed salt with an organic solvent to form an organic solution rich in lithium salt and a mixed system containing an undissolved sodium salt solid; and carrying out interface evaporation on the mixed system to remove part of the organic solvent and promote the precipitation of the sodium salt, and enriching the lithium salt in the residual liquid phase to realize the separation of the lithium salt and the sodium salt. The method provided by the invention can realize high-efficiency and high-selectivity separation of the lithium salt and the sodium salt.

Methods for concentrating brine comprising: introducing an input brine to a first hydrate column, wherein the input brine comprises a lithium ion and water; introducing an input gas to the input brine within the first hydrate column; forming a gas hydrate with the water and the gas; concentrating the input brine, due to formation of the gas hydrate with the water, to form a concentrated brine; and extracting, from the first hydrate column, the concentrated brine.

The embodiment of the invention provides a preparation method of a halide electrolyte and a solid-state battery, and the method comprises the following steps: weighing raw materials according to the components shown in the chemical general formula of the halide electrolyte and the molar ratio, and then mixing the raw materials to obtain first precursor powder; then pre-sintering the first precursor powder in an inert atmosphere to obtain a first reactant; and finally, carrying out heat treatment on the first reactant in an inert atmosphere to obtain the halide electrolyte. The method is used for achieving the technical effect of improving the ionic conductivity of the prepared halide electrolyte.

The application provides a method for separating lithium salt and carbonate organic solvent from lithium battery waste electrolyte, belongs to the technical field of waste liquid comprehensive utilization, and is used for lithium ion battery production and lithium battery recycling processes, wherein part of waste electrolyte is generated, mainly containing carbonate organic solvent and lithium salt; the application first separates the carbonate and lithium salt by adopting thin film evaporation; after neutralization, the light component carbonate solvent enters a rectification system to realize the separation of carbonates, and various carbonate products meeting the national standard requirements are obtained; after high-temperature incineration cracking and removal of residual organic impurities, the heavy component lithium salt is recycled in the form of lithium fluoride; the process realizes comprehensive utilization of the waste electrolyte, and avoids waste of lithium elements and carbonate solvents.

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a positive electrode lithium supplementing material, a preparation method and a lithium ion battery, the positive electrode lithium supplementing material is of a core-shell structure, and comprises an inner core, a middle layer and a shell; the inner core is lithium-rich lithium ferrite doped with cations, and the cations are Ti, Mg, Al, Zr or Ta; the shell is a coating layer formed by halogen and Li, and the halogen is one or more of F and Cl; the preparation method of the positive electrode lithium supplementing material comprises the following steps: in an inert atmosphere, heating a precursor, and enabling gas generated by heating to pass through a core material, so as to obtain the positive electrode lithium supplementing material; the precursor is a material capable of generating HF and / or HCl at a high temperature, and the core material is cation-doped lithium-rich lithium ferrite; the gas production rate and the interface impedance can be reduced.

The present invention relates to a method for extracting lithium from one or more lithium-containing batteries, the method comprising a dissolution step, the dissolution step comprising exposing a lithium-containing battery to an acidic leaching solution.

Electrolytic processes are provided for the conversion of lithium carbonate to high purity lithium hydroxide or higher purity lithium carbonate, which involve steps that recycle lithium after electrolysis in order to reduce lithium losses and increase the efficiency of the processes.

The application provides a purification method of lithium fluoride, high-purity lithium fluoride, lithium hexafluorophosphate, an electrolyte and a device, and the purification method of the lithium fluoride comprises the following steps: performing water washing treatment on the lithium fluoride to be purified at 0-50 DEG C to obtain a mixture containing a first solid-phase product; performing ultrasonic treatment on the mixture at 20-25 kHz to obtain a second solid-phase product through filtration; performing fluorination reaction on the second solid-phase product with electronic-grade anhydrous hydrofluoric acid to obtain a third liquid-phase product; performing ion exchange on the third liquid-phase product by using a chelating resin at 0-80 DEG C, and then performing cooling evaporation crystallization, and obtaining a fourth solid-phase product through filtration; and performing cleaning treatment on the fourth solid-phase product by using inert gas at 150-250 DEG C to obtain high-purity lithium fluoride. The high-purity lithium fluoride obtained by the purification method has low content of lithium carbonate and other impurities, and is beneficial to improving the performance and stability of subsequent products.

Electrolytic processes are provided for the conversion of lithium carbonate to high purity lithium hydroxide or higher purity lithium carbonate, which involve steps that recycle lithium after electrolysis in order to reduce lithium losses and increase the efficiency of the processes.

The invention belongs to the technical field of batteries, and particularly relates to a positive electrode material and a preparation method thereof, a positive plate, a lithium ion battery and an electric device. The positive electrode material comprises a multi-element material core and a coating layer coating the surface of the multi-element material core, wherein the coating layer comprises an oxide of an element A and / or a lithium-oxygen compound of the element A and LiF; the positive electrode material meets the condition that a / a is greater than or equal to 0.02% and less than or equal to 0.35%; 0.14% < = c / c < = 0.76%. The lithium carbonate content of the positive electrode material is low, and the positive electrode material is applied to a lithium ion battery, so that the lithium ion battery has relatively high capacity, relatively high rate capability and relatively long cycle life.

The utility model belongs to the technical field of lithium fluoride reaction kettle feeding, and particularly relates to a lithium fluoride reaction kettle feeding device which comprises a support, and a raw material barrel and a conveying pipe are fixedly connected to the side wall of the support. A control valve is arranged at the bottom of the second hose; the bottom of the control valve is fixedly connected to the top of the conveying pipe; a conveying stud is rotationally connected into the conveying pipe, and one end of the conveying stud is fixedly connected with a driven gear. A first driving gear is meshed with the side wall of the driven gear, and a second motor is arranged at the end part of the first driving gear; raw materials required by a lithium fluoride reaction kettle are preloaded by arranging the raw material cylinder, the conveying stud is arranged to guide the raw materials, and the second motor is arranged to provide power for conveying the raw materials, so that the feeding accuracy of the powder raw materials is improved, the problem that the feeding amount of a traditional automatic feeding device is not easy to control is solved, and the production efficiency is improved. And the labor cost can be reduced.

The preparation method comprises the following steps: mixing a lithium source material, water, a first solvent and quaternary amine alkali, reacting the quaternary amine alkali with carbon dioxide in a reaction atmosphere containing carbon dioxide to generate HCO3 <->, reacting the HCO3 <-> with lithium ions in the lithium source material to generate lithium bicarbonate, and collecting a water phase after the reaction; decomposing lithium bicarbonate in the water phase to generate lithium carbonate, collecting a solid phase, and decomposing lithium carbonate in the solid phase to generate lithium oxide to obtain an intermediate; dissolving quaternary ammonium iodide in a second solvent, adding the intermediate, converting the lithium oxide into lithium hydroxide, carrying out ion exchange on the lithium hydroxide and the quaternary ammonium iodide to generate lithium iodide, and collecting a liquid phase; and collecting the lithium iodide in the liquid phase. According to the present invention, based on the characteristics of the specific quaternary ammonium base and the quaternary ammonium iodide salt, the Li in the lithium source material is selectively reinforced, carbonized and leached, the anion impurities in the lithium source material are removed, the anion exchange in the organic phase is achieved, and the high-purity anhydrous lithium iodide is prepared.

The invention relates to a process for the recovery of a material comprising a halide solid electrolyte (HSE) of formula (I) M3-z (Mek +) fX3-z + k * f, said process comprising, in sequence: a) adding to a solution comprising HSE at least one ammonium salt of X ', where X and X' are halogens, in particular independently selected from Cl, Br, I and any combination thereof; b) filtering and evaporating the solution obtained in the step a) to obtain dry powder; c) heating the dry powder obtained in step b), and d) obtaining a recovered HSE of formula (I). The invention also relates to a cathode composite and an electrolyte comprising the recovered HSE obtained according to the recovery method according to the invention, and to an all-solid-state battery comprising such a cathode composite and / or electrolyte.

The present invention pertains to a method for producing a sulfide-based solid electrolyte, the method comprising obtaining a sulfide-based solid electrolyte recycled product (B) from a liquid in which a sulfide-based solid electrolyte (A) in a sulfide-based solid electrolyte-containing mixture is dissolved in an organic solvent. The mixture contains the sulfide-based solid electrolyte (A) and other substances insoluble in the organic solvent. The method comprises: obtaining a solid-liquid mixture by immersing the mixture in the organic solvent to dissolve the sulfide-based solid electrolyte (A) while having the other substances remaining as solid components in the organic solvent; obtaining a dried sulfide-based solid electrolyte recycled product (B) by subjecting the solid-liquid mixture to solid-liquid separation, causing a sulfide-based solid electrolyte to be deposited out from an obtained liquid fraction, and vaporizing the organic solvent; and subjecting the recycled product (B) to a thermal treatment at 340°C or higher.

The invention provides a method for reducing the content of residual impurities in solution polymerized styrene-butadiene rubber, which comprises the following steps: adding halide into a glue solution after polymerization is terminated, and stirring for reaction to generate volatile substances and halide salt; removing and recovering the volatile substances by using a steam flash evaporation technology; and recovering the halide salt by adopting a solid-liquid separation and evaporation technology, and carrying out drying treatment to obtain the rubber particles. According to the method, the residue of lithium byproducts is remarkably reduced, lithium resources can be effectively recycled, the wastewater treatment cost is reduced, the overall production efficiency is improved, and green, economical and efficient production of the solvent styrene butadiene rubber is realized.

The present disclosure provides sorbents that contained a crosslinked polymer binder that shows improved robustness and stability to repeated loading and elution. The present disclosure also provides methods of making the polymer-containing sorbent as well as methods of using the sorbent in the separation of lithium and lithium ions for a brine.

The application provides a lithium manganese iron phosphate positive electrode material and a surface lithiumation compensation process thereof, and belongs to the technical field of new energy batteries. The compensation process comprises the following steps: providing a lithium manganese iron phosphate base material; constructing an interface stabilization layer on the surface of the base material, wherein the interface stabilization layer is a rare earth oxide layer; and constructing a composite functional layer on the interface stabilization layer, wherein the composite functional layer comprises carbon material and composite fluoride, and the composite functional layer simultaneously provides stress buffering and lithium ion conduction functions. The lithium ion battery prepared from the lithium manganese iron phosphate positive electrode material has a significant improvement in cycle life and rate performance, can meet the demand of new energy vehicles and energy storage for high-performance batteries, and has a wide market application prospect.

The present invention relates to a hydrophobic organic liquid composition for the selective extraction of a di-ionic lithium salt comprising a lithium cation and an anion complementary to the lithium cation, chosen in particular from Cl, I, Br, CN, MK and HCO 3, from a lithium-rich brine to be treated, said composition comprising (A) at least one compound extracting the lithium cation, chosen from the compounds of formula: (I) in which R1, R2, R3, R4, R5 and R6 are as defined in the description; (B) at least one organic, protic and hydrophobic compound solvating the anion complementary to the lithium cation; and (C) at least one hydrophobic polar organic diluent having a flash point at atmospheric pressure greater than 60°C, preferably greater than 75°C, more preferably greater than 90°C.

The invention relates to hydrometallurgy of rare metals, in particular, to lithium sorption recovery from natural brines and wastewaters. The method comprises introducing a feed lithium-containing brine to a sorption-desorption concentrating module in a form of a vertical column filled with an inorganic sorbent being a chlorine-containing lithium aluminum double hydroxide. After sorption, the lithium saturated sorbent is washed with 27% ammonium chloride solution in the amount of 80-150% of the sorbent volume in the column and flowing through the column in the direction reverse to the direction of the feed brine flow. Then lithium desorption from the sorbent is performed with desalinated water to obtain a lithium enriched solution containing ammonium chloride impurities, which is then evaporated followed by ammonium chloride sublimation from the dry mixture. The effect of the invention is the reduced lithium losses with the washing solution and increased purity of the target product (LiCl concentrate).

The invention discloses a photo-thermal regenerative carbon nanocage confinement lithium chloride low-temperature energy storage composite material, and preparation and application thereof, and belongs to the technical field of energy storage materials. The composite material takes a carbon nanocage with a micropore-mesopore-macropore hierarchical structure as a carrier, lithium chloride is loaded in a nano cavity and a pore channel of the carbon nanocage in a limited range to form a stable composite structure, and the problems of leakage and agglomeration of lithium chloride can be effectively inhibited; during preparation, the carbon nanocage is prepared through a chemical vapor deposition method, and the carbon nanocage can be obtained through drying, vacuum impregnation, suction filtration and freeze-drying shaping, the process is simple and controllable, and the graded pore mass transfer advantage of the carbon nanocage can be reserved; the composite material can stably work under the environment with the temperature of 20-40 DEG C and the relative humidity of 30%-60%, and the fit lt is achieved; the device can capture, store and release 100 DEG C low-grade heat energy, can be directly driven by solar energy to dehydrate and regenerate, has the advantages of high cycle stability and green regeneration, is suitable for adsorption type heat storage, solar photo-thermal energy storage and industrial waste heat recovery devices, and has remarkable industrial application value.

The invention discloses a composite material and a preparation method thereof, a thin film, a photoelectric device and a display device, the composite material comprises metal oxide nanoparticles and a shell layer coating the surfaces of the metal oxide nanoparticles, and the material of the shell layer comprises alkali metal halide. According to the composite material provided by the technical scheme of the invention, the surfaces of the metal oxide nanoparticles are coated with the alkali metal halide, so that the stability of the metal oxide nanoparticles in the electrifying process is improved, and the electrochemical change is reduced.