44 results about "Lithium zirconate" patented technology

The invention belongs to the technical field of solid-state battery materials, and discloses an inorganic solid-state electrolyte lanthanum lithium zirconate surface interface non-metallic element doped modified material using a plasma technology and a preparation method and application thereof, which can reduce the interface impedance of an electrolyte and improve the electrochemical performance of the electrolyte. By using the plasma technology, impurities such as lithium carbonate and the like on the surface of the inorganic solid electrolyte lanthanum lithium zirconate can be etched, a lithium-loving protective layer can be generated in situ on a surface interface, and the air stability of the electrolyte block is improved. According to the invention, multi-aspect modification can be realized by combining a plasma technology with a plurality of non-metallic element excitation sources, corresponding gain protection layers can be formed according to different requirements, and performance exertion of the battery in different fields is facilitated. When the inorganic solid electrolyte lanthanum lithium zirconate modified material obtained by the method disclosed by the invention is in contact with lithium metal to form a battery, the inorganic solid electrolyte lanthanum lithium zirconate modified material shows relatively low interface contact resistance and excellent cycling stability, and has a good application value.

The invention belongs to the field of battery materials, and particularly relates to a high-adhesion battery diaphragm binder, slurry, a diaphragm and a preparation method of the high-adhesion battery diaphragm binder, and the high-adhesion battery diaphragm binder based on an acrylate copolymer is prepared through a specific reaction. And then, mixing the binder with two inorganic nano materials, namely a lithium-doped aluminum borosilicate nanowire and a sulfo-functionalized lithium zirconate titanate nanosheet, boehmite and / or aluminum oxide and the like, so as to prepare the high-adhesion diaphragm coating slurry. Wherein the nanowires provide mechanical enhancement and chemical crosslinking points, and the nanosheets improve the interface adhesion and the ionic conductivity. And finally, coating the slurry on the surface of a polypropylene diaphragm, and performing multi-stage drying and heat treatment to obtain the composite diaphragm. The diaphragm has extremely high coating bonding strength, excellent electrolyte wettability and good thermal dimensional stability and ionic conductivity, and is particularly suitable for high-energy-density lithium ion batteries and sodium ion batteries.

The invention relates to the technical field of lithium batteries, in particular to a preparation method of a protective layer for a high-voltage ternary positive electrode material saggar, which comprises the following steps: uniformly mixing zirconium oxide, a lithium source compound, a binder and water according to the mass ratio of (2-3): (2-5): (1-5): (10-60) to prepare slurry; and uniformly coating the mixture on the bottom and the side wall of the sagger, pressing, drying and sintering to obtain the protective layer. According to the method, a compact composite protection layer from the pre-lithiation sagger surface layer to the lithium zirconate layer is successfully formed on the sagger surface, the sagger corrosion rate is reduced, composition segregation caused by the fact that zirconium / lithium components in the ternary material are adsorbed by the sagger is inhibited, the interface thermal stress concentration phenomenon is remarkably relieved, the cycle service life of the sagger is prolonged, and falling of the protection layer is avoided. In addition, the invention also discloses the protective layer prepared by the method and application thereof.

The invention discloses a lithium zirconate material and a preparation method and application thereof. The preparation method comprises: weighing a lithium source material and a zirconium source material according to a stoichiometric ratio, placing the materials in a high-speed mixer, adding a sintering aid and mixing the materials uniformly to obtain a mixed material; subjecting the mixed material to a crystallization treatment, wherein the crystallization temperature is 750°C to 900°C and the crystallization time is 5 hours to 15 hours to obtain a precursor material; subjecting the precursor material to a crushing treatment to obtain a lithium zirconate material; wherein the particle size Dv50 of the zirconium source material is between 0.5 μm and 3 μm; the sintering aid is a fluoride; the rotation speed of the high-speed mixer is between 2000 rpm and 3500 rpm, and the mixing time is 5 min to 30 min.

A modified lithium iron phosphate, a preparation method therefor and a use thereof. The preparation method comprises the following steps: (1) mixing a zirconium salt, a tungstate and a solvent, to obtain a mixed salt solution, adjusting the pH, then adding lithium iron phosphate and performing a heating reaction; (2) separating a slurry obtained by the heating reaction into a solid and a liquid, and subjecting the obtained solid to a one-step sintering treatment, to obtain a first sintered material; (3) mixing an organic carbon source, a lithium source and the first sintered material, and performing a second sintering treatment, to obtain a modified lithium iron phosphate. A material having a negative thermal expansion effect is used as a coating layer, which is then coated with an electrically conductive material, causing pores to appear during a second coating process due to the negative thermal expansion effect, which is conducive to the embedding of organic matter and improves bonding tightness between the two layers of coatings. The pores generated during the negative thermal expansion process are conducive to the entry of lithium ions, which can better generate lithium tungstate and lithium zirconate from the tungsten oxide and zirconium oxide generated by decomposition.

The invention discloses a method for assisting upgrading and regeneration of a decommissioned nickel-rich cathode through Li6Zr2O7 high-temperature in-situ decomposition, and belongs to the technical field of lithium ion battery cathode regeneration. The method comprises the following steps: self-discharging a decommissioned lithium ion battery, and disassembling and separating a positive pole piece; carrying out chopping, soaking and low-temperature calcination on the retired positive plate to obtain waste cathode powder which can be used for upgrading and regeneration; the pre-synthesized Li6Zr2O7 material is added, and due to the fact that the Li6Zr2O7 material can be decomposed into Li2O, ZrO2 and Li2ZrO3 after being calcined in the oxygen atmosphere at the temperature of 800 DEG C, in-situ repair can be carried out on the retired nickel-rich cathode, and the purposes of lithium supplement, bulk phase gradient doping and surface modification are achieved. The lithium supplement material of the retired nickel-rich cathode is designed and improved, and the lithium supplement reagent is decomposed in situ to carry out a one-step upgrading regeneration strategy of bulk phase repair and surface modification, so that the limitation of the nickel-rich cathode on the lithium salt requirement is broken through, the strong alkalinity brought by LiOH is avoided, and the lithium-rich cathode can be recycled. The nickel-rich cathode subjected to in-situ decomposition modification by adopting lithium zirconate (Li6Zr2O7) has ultrahigh-temperature stability superior to that of a commercial material.

The invention discloses a lithium zirconate titanate lithium ion sieve as well as a preparation method and application thereof, and the preparation method of the lithium zirconate titanate lithium ion sieve comprises the following steps: a, preparing metatitanic acid slurry; b, filtering the metatitanic acid slurry in the step a, washing with water to obtain a filter cake, and adding a lithium salt solution into the filter cake to prepare slurry C; c, adding zirconium carbonate and lithium carbonate into the slurry C obtained in the step b, and uniformly stirring to obtain slurry D; d, adding isopropanol, acrylamide and aluminum sol into the slurry D, and uniformly stirring to obtain slurry E; and e, adding an initiator into a mixed solution of polymethylsilicone oil and polyether silicone oil, heating, dropwise adding the slurry E into the mixed solution in the form of liquid drops to obtain precursor rubber balls of the ion sieve, cleaning, drying, calcining and activating to obtain the ion sieve. The prepared lithium zirconate titanate lithium ion sieve is high in lithium ion adsorption capacity, high in selectivity and long in service life.

A positive electrode active material comprises secondary particles, wherein each of the secondary particles includes primary particles, and each of the primary particles includes an olivine-type phosphate compound and lithium zirconate.

The present application relates to a kind of composite oxides and its preparation method, positive electrode additive, positive electrode and lithium ion battery.The chemical formula of composite oxide is Li7La3Zr 2‑1.25x Nb x O 12 ·nLi2ZrO3, wherein 0.1≤x≤0.4, 2%≤n≤6%.The composite oxide of the above technical solution of the present application is based on maintaining lithium lanthanum zirconium oxygen excellent characteristics, by chemical combination lithium zirconate material, realize the composite material of electrochemical performance better than both, and solve the problem that lithium lanthanum zirconium oxygen is in air, surface layer unstable can produce the carbonic acid lithium layer of resistance value variable.In the experiment, the above composite oxide is used as positive electrode additive of lithium ion battery, and the capacity retention of lithium ion battery can be improved, which is conducive to wide application.In addition, the present application also provides a kind of preparation method of the above composite oxide, positive electrode additive comprising the above composite oxide, positive electrode comprising the above positive electrode additive and lithium ion battery comprising the above positive electrode.

The invention discloses a coated halide solid electrolyte as well as a preparation method and application thereof, and relates to the technical field of battery materials. The solid electrolyte comprises a halide electrolyte and a composite coating material coated on the surface of the halide electrolyte, the halide electrolyte is trilithiated indium hexachloroindate, and the composite coating material comprises lithium zirconate and lithium fluoride in a mass ratio of (1-2): (2-1). The lithium zirconate-lithium fluoride composite coating layer is constructed on the surface of the halide electrolyte, so that moisture-proof sealing and interface isolation of the LIC are realized, the problem that the halide electrolyte in a dry-method positive electrode is easy to lose efficacy is solved, and the comprehensive performance of the all-solid-state battery is improved.

Solid-state membrane compositions for separating carbon dioxide gas from mixed gases such as exhaust or flue gases from combusted hydrocarbon are described, where in an embodiment the composition comprises zirconyl (IV) nitrate; a lithium nitrate; a copper (II) nitrate, and a potassium nitrate. Methods for forming such copper infused lithium zirconate membrane for separating carbon dioxide gas showing enhanced absorption and desorption of CO2 gas are also described.

The application discloses a lithium manganese iron phosphate material, a preparation method thereof and a secondary battery, and relates to the technical field of secondary batteries. The lithium manganese iron phosphate material comprises a core and a first coating layer and a second coating layer which are sequentially arranged from inside to outside on at least part of the surface of the core. The core comprises lithium manganese iron phosphate, and the lithium manganese iron phosphate contains a doping element, and the doping element contains at least one of Mg and Al. The first coating layer comprises a carbon material and lithium zirconate, and the second coating layer comprises lithium niobate. The structure and composition of the lithium manganese iron phosphate material are controlled, so that the compaction density of the lithium manganese iron phosphate material is effectively improved, and the lithium manganese iron phosphate material has good rate performance and gram capacity.

The present disclosure provides a modified lithium iron phosphate, a preparation method thereof, and an application thereof. The preparation method includes the following steps: (1) mixing a zirconium salt, a tungstate, and a solvent to obtain a mixed salt solution, adjusting the pH, adding lithium iron phosphate, and performing a heating reaction; (2) after solid-liquid separation of the slurry obtained from the heating reaction, performing a one-step sintering treatment on the obtained solid to obtain a first-sintered material; (3) mixing an organic carbon source, a lithium source, and the first-sintered material, and performing a two-step sintering treatment to obtain the modified lithium iron phosphate. The present disclosure uses a material with a negative thermal expansion effect as a layer of coating, and then performs a conductive substance coating. During the secondary coating process, pores appear due to the negative thermal expansion effect, which is beneficial to the embedding of organic substances, improves the binding tightness between the double-layer coatings, and the pores generated during the negative thermal expansion process are beneficial to the entry of lithium ions, and can make tungsten oxide and zirconium oxide generated by decomposition better generate lithium tungstate and lithium zirconate.

The invention relates to the technical field of battery material preparation, in particular to a preparation method of a composite olivine structure positive electrode material, which comprises the following steps: S1, dissolving a carbon source in an ethanol solvent to form a carbon source-containing ethanol solvent; s2, uniformly dispersing a zirconium source and a lithium source in an ethanol solution to form a mixed suspension; s3, adding acetonitrile into the mixed suspension, and stirring to obtain a white viscous substance; s4, adding a lithium source, an iron source, a cobalt source, a manganese source, a phosphorus source and deionized water to prepare mixed slurry; s5, performing ball milling and spray drying to obtain a precursor; and S6, calcining to obtain the lithium zirconate coated iron, cobalt and manganese ternary composite olivine structure positive electrode material. The preparation method is simple, the process is easy to control, the preparation cost is low, the material structure is stable, excessive dissolution of metal is effectively prevented, the cycle performance and the safety performance are good, discharge volume expansion is relieved, the problem of high capacity loss of electric circulation is solved, the transmission speed of ions and electrons is increased, and the electrode toxicity is reduced.

The present invention relates to a three-layer modified layer and a surface-doped positive electrode material and a preparation method thereof, belonging to the technical field of lithium-ion batteries. The positive electrode material comprises an NCM body material, an inner coating layer, an intermediate coating layer, and an outer coating layer. The body is lithium zirconate uniformly doped with zirconium, the intermediate coating layer is a nano-zirconium oxide coating layer, and the outer coating layer is a lithium aluminum zirconium phosphate fast ion conductor layer. The total mass of the coating layer is 1% to 1.5% of the mass of the NCM body material. The shared Zr element at different interfaces strengthens the crystal structure and improves conductivity.

This application provides an anode material for solid-state batteries, a method for preparing the same, and a solid-state battery, relating to the field of solid-state batteries. The anode material includes secondary particles, which are spherical in shape and formed by stacking multiple primary particles. The primary particles include graphite and a coating layer distributed on at least a portion of the graphite surface. The coating layer is made of at least one of titanium dioxide, alumina, lithium niobate, lithium zirconate, lithium fluoride, silicon, and tin. The anode material of this application, comprising graphite and a coating layer on the graphite surface, effectively physically isolates the graphite from the contact with the sulfide solid electrolyte, significantly suppressing side reactions at the interface and effectively improving the first-cycle coulombic efficiency and cycle stability of the anode material.

The invention relates to a solid electrolyte and a preparation method thereof, a solid-state battery and electric equipment. The solid electrolyte comprises an electrolyte matrix, wherein the electrolyte matrix comprises 0.5%-50% of an organic polymer, 40%-90% of a lithium-containing electrolyte and 0-10% of a plasticizer; the solid electrolyte further comprises a lithium hexafluorozirconate additive dispersed in the electrolyte matrix, and the mass of the lithium hexafluorozirconate additive is 0.05%-10% of the mass of the electrolyte matrix; and / or the solid electrolyte also comprises an interface layer formed on the surface of the electrolyte matrix. The interface layer contains lithium hexafluorozirconate. The solid electrolyte has relatively high ionic conductivity, and the problem of relatively low ionic conductivity caused by poor contact between the solid electrolyte and an electrode interface is solved.

The application discloses a modification method of a solid-state polymer lithium metal battery interface by using lithium fluorozirconate and a composite electrolyte, and belongs to the field of solid-state electrolyte materials of lithium metal batteries. 4+ The unoccupied d orbitals are coordinated with free radicals generated by electrochemical cycles, efficiently dissipating the free radicals to inhibit polymer chain degradation; meanwhile, a stable SEI film rich in LiF is induced to be generated, and a continuous "ion bridge" channel is constructed to homogenize Li+ flux. The obtained composite electrolyte has an ionic conductivity of 8.83*10 ‑4 S·cm ‑1 , and lithium ion transference number is increased to 0.54, which significantly inhibits lithium dendrite growth and improves interface chemical stability, and is suitable for high-safety solid-state lithium metal batteries.

The invention provides a modified positive electrode material and a preparation method thereof, a positive electrode and an all-solid-state lithium ion battery. The modified positive electrode material comprises an inner core and coating particles distributed on the surface of the inner core in an island shape, the core has a general formula LiNixCoyMn1-x-yO2, x is greater than or equal to 0.6 and less than or equal to 1, and y is greater than or equal to 0 and less than or equal to 0.4; the coated particles comprise lithium zirconate particles and lithium silicate particles, and the average particle size of the coated particles is 80-300 nm; the weight ratio of the zirconium element in the lithium zirconate particles to the silicon element in the lithium silicate particles is (0.5-1): 1. The lithium zirconate particles and the lithium silicate particles are arranged on the surface of the inner core as the coating particles, so that on one hand, the thermal stability of the positive electrode material can be improved, and on the other hand, lithium zirconate and lithium silicate can optimize a lithium ion conduction channel through a synergistic effect, improve the conduction efficiency of lithium ions and reduce the interface impedance; therefore, the electrochemical stability and the structural stability of the modified positive electrode material are improved.

The invention provides a mixed coated modified high-nickel ternary positive electrode material and a preparation method thereof, and the preparation method comprises the following steps: uniformly mixing a lithium source and a high-nickel precursor, and sintering in an atmosphere furnace to obtain a first sintered material; dispersing the primary sintering material, a barium source and a zirconium source in an alcohol solvent, stirring, and evaporating the alcohol solvent to dryness to obtain a modified precursor; and sintering the modified precursor in an atmosphere furnace to obtain the mixed coated modified high-nickel ternary positive electrode material. Wherein the feeding amount of the barium source is smaller than that of the zirconium source, and the mixed coating layer of the mixed coating type modified high-nickel ternary positive electrode material contains barium zirconate, lithium zirconate and zirconium dioxide. The process is simple and convenient, the amount of residual alkali on the surface of the material is reduced by utilizing special material selection and feeding amount design of a non-aqueous system, a barium source and a zirconium source, and barium zirconate, lithium zirconate and zirconium dioxide are coated on the surface of the positive electrode material, so that the ion transmission efficiency and the structural stability of the material are synergistically improved; and the interface side reaction when the material is in contact with sulfide electrolyte is reduced.

The present disclosure provides improved compositions and methods for creating robust lithium zirconate-based solid-state compositions with enhanced mechanical properties and CO2 separation performance. These compositions address the longstanding challenges of poor cohesion, dimensional instability, and durability that have limited the practical implementation of lithium zirconate in industrial CO2 separation processes. By enabling the practical use of high-temperature CO2 separation compositions, the present disclosure contributes to the technical field of carbon capture and climate change mitigation.

This invention discloses a cathode material and its preparation method, a cathode electrode sheet, and an all-solid-state lithium battery, belonging to the field of all-solid-state lithium battery technology. The cathode material includes a core and a composite coating layer covering the surface of the core. The core includes a ternary cathode material. The composite coating layer includes an inner coating layer, a middle coating layer, and an outer coating layer arranged sequentially from the inside out. The inner coating layer is a solid electrolyte, the middle coating layer is at least one of lithium niobate, lithium zirconate, and lithium tantalate, and the outer coating layer is lithium phosphate. Both the middle and outer coating layers are continuous films. Along the diameter direction of the core, the elastic modulus of the inner coating layer is greater than that of the middle coating layer, and the elastic modulus of the middle coating layer is greater than that of the outer coating layer.

The invention provides a lithium-rich manganese-based positive electrode material, a preparation method thereof and an electrochemical device. The lithium-rich manganese-based positive electrode material comprises a base material and a coating layer, the coating layer comprises a lithium hexafluorozirconate coating layer located on the surface of the base material and a fluoride coating layer located on the side, away from the base material, of the lithium hexafluorozirconate coating layer, the chemical formula of the base material is Li (LixMnaNi1-a-bAlb) O2-delta, x is larger than or equal to 0.05 and smaller than or equal to 0.33, 0lt, y is larger than or equal to 0.05 and smaller than or equal to 0.33, 0lt, and y is larger than or equal to 0.05 and smaller than or equal to 0. A < lt >; 0.1 < = b < = 0.25, and 0 < = delta < = 0.2. According to the lithium-rich manganese-based positive electrode material, a unique lithium hexafluorozirconate-fluoride dual-coating structure is adopted, so that instability of a positive electrode / electrolyte interface and manganese dissolution of the lithium-rich manganese-based positive electrode material under high voltage are effectively relieved, and the lithium-rich manganese-based positive electrode material has high capacity, excellent rate capability and long cycle life at the same time.

Solid-state battery cell, comprising: A Anode electrodes with an anode active material layer arranged on an anode current collector; C Cathode electrodes with a cathode active material layer arranged on a cathode current collector, the cathode active material layer comprising: Cathode active material with particles comprising an outer layer of lithium niobate (LiNbO3) and lithium zirconate (Li2ZrO3), where the BET surface area of ​​the particles is in a range of 0.2 to 0.8 m² 2 / g lies; and a solid electrolyte with a D 50 -Size in the range of 4 µm to 12 µm; and S separators arranged between the A anode electrodes and the C cathode electrodes, where A, C and S are integers greater than one.

A battery cathode material includes cathode material, ceramic material, and carbon-containing gel. The cathode material includes lithium nickel cobalt manganese oxide (NCM), lithium nickel cobalt aluminum oxide (NCA), lithium nickel manganese oxide (LNMO), lithium cobalt oxide (LCO), lithium iron phosphate (LFP), lithium nickel cobalt manganese aluminum oxide (NCMA), or combinations thereof. The ceramic material surrounds the cathode material, and includes gallium, aluminum, or tantalum doped lithium lanthanum zirconium oxide (LLZO), lithium zinc titanate (LZTO), lithium aluminum titanium phosphate (LATP), lithium-zirconium phosphate (LZPO), lithium zirconate (LZO), or combinations thereof. The carbon-containing gel wrapping the cathode material, and includes binder and carbon-containing conductive material, in which the binder includes polyvinylpyrrolidone, polyvinyl alcohol, sodium dodecyl sulfonate, sodium dodecylbenzenesulfonate, glucose, carboxymethyl cellulose, alginate, or combinations thereof, and the carbon-containing conductive material includes carbon nanotube.

Solid-state membrane compositions for separating carbon dioxide gas from mixed gases such as exhaust or flue gases from combusted hydrocarbon are described, where in an embodiment the precursors composition comprises zirconyl (IV) nitrate; a lithium nitrate; a copper (II) nitrate, and a potassium nitrate. Methods for forming such copper infused lithium zirconate membrane for separating carbon dioxide gas showing enhanced absorption and desorption of CO2 gas are also described.

The invention discloses a method for eliminating LLZTO pores and improving the performance of a solid electrolyte through oxygen-assisted sintering, and belongs to the technical field of lithium ion batteries. The preparation method comprises the following steps: preparing tantalum-doped lithium lanthanum zirconate (LLZTO) solid electrolyte powder with a garnet type cubic phase structure through a solid-phase method, weighing medicines according to a molar ratio, carrying out wet ball-milling mixing, drying, tabletting, pre-calcining the mixed powder tablets in air, carrying out ball-milling mixing on the pre-calcined powder, drying, and carrying out cold press molding, so as to obtain the tantalum-doped lithium lanthanum zirconate solid electrolyte. And sintering at high temperature in oxygen to obtain a compact and void-free electrolyte sheet. The cubic phase Ta-doped LLZO is synthesized, pores in the LLZO are eliminated through rapid sintering in oxygen, and the density of the electrolyte is improved, so that an ion transmission channel is improved, and the ionic conductivity is improved.

In order to solve the technical problems that lithium zirconate prepared by an existing preparation method of lithium zirconate is non-uniform in texture and relatively low in purity, the invention provides a preparation method of battery-grade lithium zirconate, and lithium zirconate with uniform texture and the purity of 99.9% or above can be produced. Impurities capable of being dissolved in hydrochloric acid in zirconium oxide are washed away through hydrochloric acid, and the purity of raw materials for preparing lithium zirconate is guaranteed; according to the preparation method, the distribution uniformity of lithium and zirconium in the prepared lithium zirconate is ensured by adopting wet mixing and crushing, grinding and mixing, and meanwhile, lithium acetate and zirconium oxide can fully react when lithium acetate and zirconium oxide which are secondarily mixed are subsequently heated and dried, so that the purity of the lithium zirconate is ensured.

The application discloses a synthetic method of a composite coating and application of the composite coating to a surface of an artificial bone, and belongs to the technical field of biomaterials.The synthetic steps of the composite coating are as follows: firstly, the artificial bone substrate is cleaned and subjected to oxygen plasma activation pretreatment; secondly, polyether ether ketone is dissolved in N-methyl pyrrolidone, mixed with tantalum-doped lithium zirconate nanowires and a dispersing agent, and subjected to ultrasonic treatment to form a coating slurry; the coating slurry is formed into a wet film on the substrate by dip-coating; and finally, the wet film is subjected to step-by-step heat treatment and solidification to obtain the composite coating.The preparation steps of the nanowires are as follows: zirconium ethoxide, tantalum ethoxide and lithium methoxide are used as precursors, and a precursor sol is obtained through a sol-gel reaction under the control of water quantity; the nanowires are grown through a hydrothermal reaction combined with a morphology directing agent; and finally, the nanowires are washed, dried and calcined to obtain the final product.The method has simple process, and the obtained coating has excellent biocompatibility, mechanical strength and potential bioactivity, is suitable for surface modification of an artificial bone implant, and can effectively promote bone integration.

The present disclosure provides improved compositions and methods for creating robust lithium zirconate-based solid-state compositions with enhanced mechanical properties and CO2 separation performance. These compositions address the longstanding challenges of poor cohesion, dimensional instability, and durability that have limited the practical implementation of lithium zirconate in industrial CO2 separation processes. By enabling the practical use of high-temperature CO2 separation compositions, the present disclosure contributes to the technical field of carbon capture and climate change mitigation.