21 results about "Lithium zirconate" patented technology

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.

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.

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 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.

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 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.

This invention discloses a garnet-type lithium-ion solid electrolyte and its preparation method. The preparation method involves ball milling LLZMO precursor powder with zirconium source A to obtain a mixed powder. The mixed powder is then pre-formed to obtain a rough blank, which is sintered in an air atmosphere to obtain a garnet-type lithium-ion solid electrolyte with lithium carbonate completely eliminated from the surface and grain boundaries and coated with lithium zirconate. This invention avoids the problems of lithium carbonate hindering sintering density, reducing lithium-ion conductivity, and increasing interfacial impedance. At the same time, the surface of the core material is coated with a lithium zirconate layer with good stability, which can further improve the air stability of the garnet electrolyte.

The invention relates to a positive electrode active material, a battery and a method for manufacturing the positive electrode active material. The purpose of the present disclosure is to improve cycle characteristics. A positive electrode active material includes a plurality of secondary particles, each of the plurality of secondary particles includes a plurality of primary particles, and each of the plurality of primary particles includes an olivine-type phosphate compound and lithium zirconate.

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.