339results about "Zirconium compounds" patented technology

The invention provides a surface-modified sulfide electrolyte and a preparation method thereof, and an all-solid-state battery, the surface-modified sulfide electrolyte comprises a sulfide electrolyte and a modification layer coated on the surface of the sulfide electrolyte, the chemical general formula of the modification layer is LiaMbNcXd, 0 < = a < = 3, 0 < = b < = 1, 0 < = c < = 1, 0 < = d < = 6, and 0 < = c < = 1. M is at least one element of magnesium, aluminum, calcium, iron, zirconium, niobium, tantalum, tungsten, gadolinium, yttrium, indium, hafnium, lanthanum and ytterbium, and X is at least one element of oxygen, sulfur, fluorine, chlorine, bromine and iodine. According to the surface-modified sulfide electrolyte, the modification layer with high ionic conductivity and high oxidation potential is coated outside the sulfide electrolyte, so that when the surface-modified sulfide electrolyte is applied to a positive electrode of an all-solid-state battery, the modification layer can improve the oxidation potential of the electrolyte on the premise of not reducing the ionic conductivity of the electrolyte; the effects of improving the interface stability between the positive electrode active material and the sulfide electrolyte and further improving the cycle performance of the battery are achieved.

The invention relates to the technical field of lithium ion batteries, in particular to a composite lithium-rich manganese-based positive electrode material and a preparation method and application thereof. The composite lithium-rich manganese-based positive electrode material is of a three-layer structure and sequentially comprises a lithium-rich manganese-based oxide positive electrode material matrix, a first coating layer and a second coating layer from inside to outside, the first coating layer is a mixture of halide solid electrolyte and lithium-containing oxide; and the second coating layer is an oxide solid electrolyte. The conductivity of a contact interface with a positive electrode material can be improved, the resistance is reduced, the moisture absorption degradation of halide is inhibited, the packaging difficulty is reduced, and the cycle performance of the halide-added solid electrolyte after moisture absorption is improved.

The invention relates to the technical field of batteries, in particular to a composite positive electrode material, a preparation method thereof and a battery. The composite positive electrode material comprises a positive electrode substrate, a fast ion conductor layer and a halide layer, the positive electrode substrate comprises a doped lithium cobalt oxide material; the fast ion conductor layer is positioned on the surface of the positive electrode substrate and comprises an oxide of a metal element Q with a spinel phase; the halide layer is located on the surface of the fast ion conductor layer and comprises element lithium, metal element M and halogen X. Through coordination and cooperation of the matrix material, the fast ion conductor layer and the halide layer, the structural stability and the surface morphology of the material can be effectively improved, the defects of the material are overcome, and the composite positive electrode material has excellent conductivity and has excellent cycling stability and rate capability at high temperature and / or high voltage, so that the battery has high safety performance.

To provide a conductive paste for an internal electrode of a layered ceramic capacitor, which is capable of maintaining relatively high coverage even if the internal electrode constitutes a thin layer.SOLUTION: Provided is a conductive paste for forming internal electrodes 4 and 5 of a layered ceramic capacitor 1 fabricated through a firing step. The conductive paste includes conductive metal powder, ceramic powder, an organic solvent, and an organic binder. The conductive metal powder contains a silver / palladium alloy. At least a portion of the ceramic powder comprises an ABO3 type oxide having a specific ion radius in which the ratio of the ion radius in the 6-coordination of an element at the A site in ABO3 with respect to the ion radius in the 6-coordination of a metal element contained in the conductive metal powder is 0.96 or more and 1.10 or less.SELECTED DRAWING: Figure 1

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 energy storage batteries, in particular to a solid-state oxide electrolyte and a preparation method thereof, a solid-state electrolyte membrane and a solid-state battery. The solid oxide electrolyte comprises an oxide electrolyte matrix and an anionic dopant; the oxide electrolyte matrix comprises at least one of a lithium system matrix, a sodium system matrix and a potassium system; the anionic dopant correspondingly comprises at least one of a lithium system additive, a sodium system additive and a potassium system additive. According to the solid oxide electrolyte based on transferable anion doping and the all-solid-state lithium metal battery provided by the invention, controllable migration of anions in the electrolyte is regulated and controlled, a dynamic self-adaptive interface layer (DAIs) is constructed, and long-cycle stable work under low external pressure is realized.

The invention relates to the field of hydrometallurgy, and discloses a method for converting hafnium oxalate feed liquid into hafnium oxychloride feed liquid, which is characterized by comprising the following steps: adding an HCl solution and an oxidizing agent into the hafnium oxalate feed liquid, and reacting at a certain temperature to obtain a hafnium oxychloride solution. The method has the advantages of simple operation, no introduction of any metal impurity ions, small reagent consumption, low energy consumption, low cost, high efficiency, no physical state change, and realization of continuous production. The method for adding the HCl solution and the oxidizing agent into the oxalate feed liquid is also suitable for converting oxalate solutions of other metal ions into chloride solutions, including but not limited to zirconium oxalate, titanium oxalate, thorium oxalate, scandium oxalate, niobium oxalate, tantalum oxalate, vanadium oxalate, cobalt oxalate, cesium oxalate and rubidium oxalate.

The invention relates to the field of solid-state batteries, in particular to a halide electrolyte, a preparation method and a solid-state battery. The halide electrolyte comprises a tin element, and the chemical formula of the halide electrolyte is Li2Zr < 1-x > Sn < x > Cl < 6-4x > O < 2x >, and x is less than or equal to 0.3. Through tin-oxygen co-doping, force is exerted at the same time from the two aspects of crystal structure (bulk phase) and interface chemistry, the key problems of ionic conductivity, electrochemical stability, interface compatibility and the like are cooperatively solved, the cost and the process are perfectly considered, and an all-solid-state battery electrolyte solution with a great commercialization prospect is provided.

The invention provides a lithium ion halide solid electrolyte, the chemical composition of the lithium ion halide solid electrolyte is LixMa + Nb + yClx + a + by, a is the valence of an element M, and b is the valence of an element N; 1 < = x < = 4, 0lt; y < = 1, 2 < = a < 5, and 2 < = b < = 5. The lithium ion halide solid electrolyte provided by the invention not only has high room-temperature ionic conductivity, but also has relatively good negative electrode contact stability due to relatively low valence. The invention also provides a preparation method of the lithium ion halide solid electrolyte, the raw materials adopted by the method are low in cost, and the synthesis technical route is simple.

To provide a zirconia-based porous material in which the change in pore size distribution due to crushing treatment is small and the decrease in specific surface area due to heating is suppressed. [Solution] A zirconia-based porous body containing 40% by mass or more of zirconia and 5% by mass or more of rare earth element oxides up to 60% by mass, satisfying all of the following conditions (1) and (2) in the pore size distribution based on the mercury intrusion method: (1) The maximum value of the peak in the range of 10 nm to less than 300 nm is 1.0 ml / g or more and 4.0 ml / g or less. (2) The pore volume in the range of 300 nm to 100,000 nm is 0.05 ml / g or more and 1.00 ml / g or less.

The invention belongs to the technical field of zirconium oxychloride preparation, and particularly relates to a preparation method of zirconium oxychloride. The preparation method of the zirconium oxychloride comprises the following steps: (1) carrying out acid leaching on waste fused zirconia corundum brick powder; (2) alkali fusion roasting of filter residues; (3) leaching with hot water and refluxing with hydrochloric acid; (4) purification treatment; and (5) post-treatment. According to the preparation method of the zirconium oxychloride, the waste fused zirconia corundum brick powder is used as a raw material, the problem of solid waste disposal of retired waste fused zirconia corundum bricks of a glass kiln is solved, efficient recycling of resources is achieved, a non-renewable resource zircon sand raw material is partially replaced, and the production cost is reduced; the high-purity zirconium oxychloride is prepared through acid leaching, alkali fusion, hot water leaching, hydrochloric acid reflux conversion, purification and aftertreatment.

The application discloses a method for reducing water content and water absorption of solid electrolyte. It relates to the field of solid or semi-solid batteries. The method for reducing water content and water absorption of solid electrolyte comprises the following steps: S1, heating the solid electrolyte powder by using infrared heating mode to remove water and / or impurity organic matter adsorbed on the surface of the solid electrolyte powder; S2, making the solid electrolyte powder in a fluidized state, heating and vaporizing low-surface-energy organic matter, and making the generated organic vapor contact with the solid electrolyte powder in the fluidized state in an inert atmosphere, wherein the temperature of the solid electrolyte powder in the fluidized state is lower than that of the organic vapor. The application aims to solve the technical problem that high specific surface area inorganic solid electrolyte powder is easy to physically adsorb water in air.

This invention belongs to the field of lithium-ion battery technology, specifically relating to a composite cathode material for lithium-ion batteries and its preparation method. The composite cathode material consists of three parts: a cathode matrix material, a lithium replenishment material, and a catalyst material. The preparation method is as follows: (1) preparing a composite material of the cathode matrix material and the lithium replenishment material in situ; (2) dispersing the catalyst material on the surface of the composite material and forming a stable interface layer between the catalyst material and the lithium replenishment material. Through the method of this invention: the lithium replenishment material has both surface modification of the cathode matrix material and lithium replenishment of the negative electrode, simultaneously improving the battery's initial efficiency and cycle stability; introducing the catalyst material onto the surface of the lithium replenishment material in situ fixes the free O generated by the Li release from the lithium replenishment material, alleviating the battery swelling phenomenon and further improving the battery's cycle stability and safety; moreover, the preparation process is simple, the raw materials are cheap and readily available, the production cost is low, and it is easy to promote industrial production.

The application discloses a method for preparing ZrSiO4 aerogel by sol-gel combined supercritical drying, and the wet gel is prepared by using a silicon source, a zirconium source and a crosslinking agent as raw materials, then the low-density and high-porosity dry gel is obtained by CO2 supercritical drying, and then the control of the gel component and structure is realized by controlling the heat treatment process, so that the ZrSiO4 aerogel with low density, high porosity, excellent high-temperature resistance and good thermal stability is obtained. Through the control of the component, the gel process and the heat treatment process, the controllable preparation and performance regulation of the ZrSiO4 aerogel are realized.

Provided are an electrolyte powder, a sheet, an electrochemical element, and an electric power storage device which can facilitate quality control. The electrolyte powder has a garnet-type crystalline structure containing Li, Zr, and La, and satisfies b*≥2 in chromatic coordinates of CIE 1976 L*a*b* color space. The electrolyte powder optionally satisfies a*≥0, and the chroma represented by c*={(a*)2+(b*)2}1 / 2 optionally satisfies 2≤c*≤10. The sheet, the electrochemical element, and the electric power storage device each include the electrolyte powder.

The invention provides a halide electrolyte material and a preparation method thereof, a positive plate, a secondary battery, a battery assembly and electric equipment. The halide electrolyte material is doped with a fluorine element and a zinc element. The halide electrolyte material provided by the invention has good ionic conductivity and air stability.

The invention belongs to the technical field of solid electrolyte materials, and particularly relates to a garnet type solid electrolyte and a preparation method and application thereof. The D50 of the garnet type solid electrolyte is less than 300nm, and the specific surface area of the garnet type solid electrolyte is 2-30m < 2 > / g. The garnet type solid electrolyte has the beneficial effects that the garnet type solid electrolyte has irregular spherical morphology, good particle dispersity, uniform granularity and relatively small particle size, and has a wide application prospect, especially in the field of lithium ion solid-state battery manufacturing; the preparation method of the garnet type solid electrolyte is high in controllability, simple and convenient to operate and low in manufacturing cost, and the whole preparation reaction process is carried out under low-temperature and normal-pressure conditions, so that the preparation method is energy-saving and environment-friendly.

A sintering aid mixture for sintering solid-state ion conductors, electrode materials, or the like for solid-state batteries is provided. The mixture includes at least one sol-gel precursor and / or at least one sol-gel direct precursor produced from at least one sol-gel precursor.

New polycrystalline materials having yttrium aluminum perovskite (YAP) and yttrium zirconate (YZ) are described. In one aspect, a polycrystalline material (e.g., a bulk or monolithic polycrystalline material) may comprise (a) at least 50 wt. % yttrium aluminum perovskite (YAP) phase, and (b) at least 0.1 wt. % yttrium zirconate (YZ) phase. Such polycrystalline materials may realize an improved combination of properties, such as an improved combination of two or more of density, modulus of rupture (MOR), fracture toughness, dielectric strength, loss tangent, and plasma etch resistance, among others.

This invention provides a method for preparing a lithium-rich manganese-based cathode material, comprising the following steps: D1: Lithium nitrate, manganese nitrate, nickel nitrate, and cobalt nitrate are dissolved in deionized water at a molar ratio of 1.2:0.54:0.13:0.13 to prepare a metal salt solution. 1.2 Mn 0.54 Ni 0.13 Co 0.13 O2 is co-precipitated with a precipitant and a complexing agent in a solvent to generate a lithium-rich manganese-based core; D2: The lithium-rich manganese-based core is mixed with an interfacial bridging agent in an organic solvent and stirred for 2-4 hours. After drying, an interfacial bridging agent layer is formed on the lithium-rich manganese-based core; D3: The material obtained after step S2 is mixed successively with three metal salt solutions of different concentrations, and different NCM shells are coated on the outside of the interfacial bridging agent layer; D4: After high-temperature sintering, a lithium-rich manganese-based cathode material is obtained. In this invention, the LMRO core, Li2ZrO3 bridging agent, and gradient NCM shell work synergistically to greatly enhance the inhibition of lattice oxygen migration, improve structural stability, and thus significantly improve the first-time efficiency and suppress the cumulative gas release.

This invention discloses a modified lithium lanthanum zirconium oxide material, its preparation method, and its application, relating to the field of solid electrolyte material preparation and application. The modified lithium lanthanum zirconium oxide material of this invention comprises lithium lanthanum zirconium oxide material and a TiCN / W-Cu composite material, with the TiCN / W-Cu composite material coating the outer surface of the lithium lanthanum zirconium oxide material. Coating the surface of the lithium lanthanum zirconium oxide material with the TiCN / W-Cu composite material effectively increases the ionic conductivity of the lithium lanthanum zirconium oxide material and also helps improve the material's processing performance, making it suitable as a solid electrolyte for use in lithium-ion solid-state batteries.

The invention discloses a surface coating modification method of a Prussian blue analogue sodium ion battery positive electrode material, and the method comprises the following steps: S1, preparing a precursor solution; S2, pretreating a substrate; S3, carrying out in-situ non-hydrolytic sol-gel coating: dropwise adding a mixed solution obtained in the S1 into a dispersion liquid obtained in the S2, carrying out a stirring reaction in an inert atmosphere, and carrying out in-situ non-hydrolytic sol-gel coating to obtain the Prussian blue analogue sodium ion battery positive electrode material. The reaction temperature is controlled to be 50-80 DEG C, and the reaction time is 2-6 hours; and S4, heat treatment forming is conducted, and the modified PBA material with the surface coated with the aluminum-zirconium composite oxide layer is obtained. According to the modification method, a uniform and firm coating layer with specific composition and structure can be formed on the surface of PBA, so that the problems of structural stability and interfacial compatibility of PBA in electrochemical circulation are solved, and the comprehensive performance of the sodium ion battery is improved.

Disclosed are a high Young's modulus solid electrolyte, an all-solid-state lithium battery, and preparation methods thereof, belonging to the technical field of batteries. The preparation method of the high Young's modulus solid electrolyte includes following steps: firstly, melting an electrolyte raw material under dry and oxygen-free conditions, then rapidly cooling into a solid block, and grinding into powder. The process is simple, and the prepared solid electrolyte has good mechanical properties. According to the all-solid-state lithium battery prepared from the solid electrolyte, the interface stability of the lithium battery can be greatly improved, the solid-solid mechanical contact is improved, and the cycle performance and efficiency of the battery are improved.

An electrode material of the present disclosure is an electrode material that includes a compound represented by the chemical formula BaZr1-x-yMxCoyO3-δ. M is In or Yb, and the chemical formula satisfies 0<x<1, 0<y<1, 0<(x+y)<1, and 0<δ<1. A membrane electrode assembly of the present disclosure includes a first electrode including the electrode material, and an electrolyte membrane provided on a first main surface of the first electrode.

This invention discloses a method for preparing the ZrS2 monoclinic P21 / m phase via high-pressure shearing, belonging to the field of semiconductor material synthesis and preparation. ZrS2 exists as a trigonal P3m1 phase under normal temperature and pressure. An appropriate amount of ZrS2 P3m1 phase is weighed and placed at the center of the anvil of a double-sided rotating hydraulic press. The original sample is pressurized until the target pressure is reached. Then, the anvil is rotated by a certain angle, applying pressure and shear stress simultaneously. The sample removed after depressurization is the monoclinic P21 / m phase ZrS2. This invention uses high-pressure, high-shear treatment to prepare the ZrS2 monoclinic P21 / m phase while maintaining the same composition. The process can be carried out at room temperature without adding any external additives, and is simple and easy to operate.

To provide an inorganic solid electrolyte dispersion in which an inorganic solid electrolyte in an inorganic solid electrolyte dispersion has uniform dispersibility and also has long-term dispersion retainability.SOLUTION: There is provided an inorganic solid electrolyte dispersion in which an inorganic solid electrolyte powder used as a solid electrolyte in an all-solid-state battery is dispersed in a solvent, wherein the median diameter (D50) of the inorganic solid electrolyte powder obtained from a volume-based particle size distribution measured by a laser diffraction particle size distribution method is 6.5 μm or less and the standard deviation (σ50) based on the medium diameter (D50) is 3.5 μm or less.SELECTED DRAWING: None

The present disclosure provides a lithium ion battery material and a preparation method therefor and a use thereof. The structural formula of the lithium ion battery material is Li4ZrF8-2XOX, wherein 0<X≤0.15. According to the present disclosure, oxygen doping is carried out on a Li4ZrF8 material by means of a zirconium-containing oxide, and oxygen doping is carried out at position F, so that the ionic conductivity of the Li4ZrF8 material is greatly improved. When the Li4ZrF8-2XOX material is applied to a lithium ion battery, after the material reacts with water molecules in an electrolyte to generate hydroxyl, the water content in the electrolyte can be reduced.

A method for manufacturing composite ceramic electrolyte particles with hydrophobic protective layers for a battery electrode includes the steps of: placing a plurality of first LLZO particles, a methanol and a plurality of hydrophobic particles into a wet mixer for mixing; then placing a tris material and a tris(hydroxymethyl)aminomethane hydrochloride into the wet mixer for stirring to cause each of the first LLZO particles and the hydrophobic particles is coated with a hydroxide ion layer; and then placing a dopamine hydrochloride into the wet mixer for mixing to cause dopamine molecules of the dopamine hydrochloride are co-polymerized to form a dopamine layer coated on the hydroxide ion layer on the corresponding first LLZO particle or hydrophobic particle, and the first LLZO particles having the dopamine layer are coated with corresponding hydrophobic particles having the dopamine layer to form composite LLZO particles.

The present disclosure provides a ceramic sheet, a method for preparing same, and an all-solid secondary battery comprising same. According to the present disclosure, provided is a garnet-type oxide-based ceramic sheet that contains a garnet-type oxide and comprises a surface layer and a deep layer, wherein the average lithium content in garnet-type oxide particles in the surface layer is greater than the average lithium content in garnet-type oxide particles in the deep layer, and the ratio of the average lithium content in the garnet-type oxide in the surface layer to the average lithium content in the garnet-type oxide in the deep layer is greater than 1 and less than 1.014.

The utility model relates to the technical field of lanthanum zirconate preparation, and discloses a lanthanum zirconate preparation device with a heat insulation function, which comprises a fixed outer frame, the inner side of the fixed outer frame is fixedly connected with a mixing bin, the top of the mixing bin is fixedly connected with a fixed frame, the middle part of the fixed frame is fixedly connected with a double-head motor, and the double-head motor is fixedly connected with a heat insulation device. One output end of the double-end motor is fixedly connected with a stirring rod, the outer wall of the stirring rod is fixedly connected with stirring blades, the inner wall of the mixing bin is fixedly connected with auxiliary blades, and the top of the mixing bin is provided with a heating assembly. According to the utility model, the problems of non-uniform heat distribution, limited temperature control precision, difficulty in effectively preventing heat loss and limitation on stirring and heating function optimization space of the device are solved, efficient and uniform heating is achieved, local over-burning or under-burning is avoided, heat loss can be avoided due to efficient sealing and heat insulation, and the service life of the device is prolonged. And the lanthanum zirconate powder is more stable in crystal phase and higher in purity.