59results about "Alkali titanates" patented technology

A titanium-containing oxide powder which is mainly composed of a titanium-containing oxide represented by Li4Ti5O12 or Ti1-X / 2Nb2O7-X (wherein 0 ≤ X < 2), and which is characterized by containing particles of the titanium-containing oxide and a solvation ionic liquid that is composed of an Li salt and an organic solvent.

This invention discloses a type of sodium titanate with a layered crystal structure, its preparation method, and its application in aqueous magnesium-ion batteries, belonging to the field of aqueous magnesium-ion battery technology. This invention uses sodium titanate with a layered crystal structure as the negative electrode material in aqueous magnesium-ion batteries. Due to its excellent chemical and structural stability, sodium titanate can achieve reversible magnesium deposition in aqueous magnesium electrolytes. 2+ Intercalation / extraction. This invention synthesizes Na via a hydrothermal method and a high-temperature annealing process. 2 Ti 2 O 5 And Na 2 Ti 3 O 7 Materials. In magnesium chloride electrolyte, both sodium titanate materials exhibit extremely low charge / discharge potentials (Na). 2 Ti 2 O 5 -1.3 to -0.6V vs. SCE; Na 2 Ti 3 O 7 (-1.5 to -1V vs. SCE) and good cycle stability. Furthermore, Na... 2 Ti 2 O 5 The half-cell exhibits a charge-discharge specific capacity of up to 213 mAh / g at a current density of 2 A / g, and maintains a high specific capacity of 150 mAh / g even at a high current density of 10 A / g. The sodium titanate of this invention is an ideal anode material for aqueous magnesium batteries, possessing both low cost and environmental friendliness, and shows great promise for application in the field of aqueous magnesium-ion energy storage.

A method for preparing a nano-titanate, a nano-titanic acid and a nano-TiO2 containing embedded A nanoparticles is provided respectively. In this method, a Ti-T alloy with a A-group element solidly dissolved therein is used as a titanium source, and reacted with an alkali solution under a certain condition. In combination with subsequent treatment, the preparation of a titanate nanotube, a titanic acid nanotube, and a TiO2 nanotube / rod containing embedded A nanoparticles, respectively, is further achieved with high efficiency and low cost. Moreover, a method for preparing metal nanoparticles is also provided by removing the matrix of the composites. The present preparation methods is characterized by simple process, easy operation, high efficiency, low cost. The product is of promising application in polymer-based nanocomposites, ceramic materials, catalytic materials, photocatalytic materials, hydrophobic materials, effluent degrading materials, bactericidal coatings, anticorrosive coatings, marine coatings.

The present invention relates to a negative electrode active material for a lithium secondary battery, a method for preparing same, and a lithium secondary battery comprising same. More specifically, the negative electrode active material comprises one selected from Li1.1Ti0.9O2 and a mixture in which Li1.1Ti0.9O2 and carbon nanotubes (CNTs) are mixed in a weight ratio of 8:2 to 9:1. The negative electrode active material for a lithium secondary battery, comprising the above-described components has an R-3m structure, and provided is a lithium secondary battery which exhibits high capacity and excellent lifespan characteristics, and in particular, exhibits high capacity during high-rate charging and discharging.

Provided are: coated flaky titanic acid particles, which can form a design coating film with a good silky texture and shadowed appearance when flaky titanic acid is applied to an organic solvent-based paint and, which can also sufficiently suppress discoloration (yellowing) of the coating film even in a relatively severe environment, such as prolonged exposure to ultraviolet light; and a production method therefor.　The surface of the flaky titanic acid particles has an oxide and / or hydroxide of aluminum, and an anionic surfactant present thereon. Preferably, the anionic surfactant is a hydrocarbon-based anionic surfactant having 5 or more carbon atoms in the main chain or a fluorinated anionic surfactant having 4 or more carbon atoms. Said production method comprises: a step for maintaining an aqueous slurry, which contains flaky titanic acid particles and an aluminum source, at a temperature of 50-95°C inclusive and at a pH of 5-12 inclusive to treat the surface of the flaky titanic acid particles with an oxide and / or hydroxide of aluminum; and a subsequent step for mixing the obtained flaky titanic acid and an anionic surfactant in a solution.

The present invention relates to a method for preparing a nano-titanate, a nano-titanic acid and a nano-TiO2 containing doping E or embedding E nanoparticles, and the use thereof. By using an E-doped Ti-T intermetallic compound as a titanium source, and reacting the E-doped Ti-T intermetallic compound with alkaline solution at atmospheric pressure and near its boiling-point temperature, an E-doped titanate nanofilm is prepared at atmospheric pressure with high efficiency and in a short time. Through acid treatment and (or) heat treatment, a titanate nanofilm containing embedding E nanoparticles, an E-doped titanic acid nanofilm, and a titanic acid nanofilm and a TiO2 flake powder containing embedding E nanoparticles can be further prepared. Through a subsequent reaction at high temperature and pressure, the preparation of an E-doped titanate nanotubes and titanic acid nanotubes, and titanic acid nanotubes and TiO2 nanotubes / nanorods containing embedding E nanoparticles can be achieved in high efficiency and low-cost.

The invention relates to the field of lithium ion batteries, and discloses low-water-absorption lithium titanate, a preparation method thereof, a negative pole piece, a lithium battery and electric equipment. According to the invention, the specific water-resistant polymer protective layer is added on the surface of the lithium titanate material, so that the adsorption to moisture is reduced, the requirement on the humidity of the environment is reduced, and the lithium titanate battery manufacturing process environment is favorably achieved. The prepared lithium titanate pole piece is coated with the protective film, so that the side reaction between the electrolyte and the pole piece after the battery is manufactured in the later period can be reduced, and the gas production problem of the lithium titanate battery can be relieved. The polymer coated protective film on the surface of the lithium titanate material can form a protective layer similar to an SEI (solid electrolyte interface) film in the subsequent charging and discharging process of the lithium titanate battery, so that the stability of the lithium titanate battery is improved. According to the application of the low-water-absorption lithium titanate, the humidity requirement of the lithium titanate battery manufacturing process can be reduced, the lithium titanate battery manufacturing process achievement rate can be improved, the lithium titanate manufacturing process cost and energy consumption can be reduced, and large-scale manufacturing is easy.

The present invention relates to a lithium-titanium complex oxide, a preparation method thereof, and a lithium secondary battery comprising the same and, more specifically, to a lithium-titanium complex oxide which maintains appropriate pores within particles, and which is prepared by adding a pore inducing material in the wet-milling step to adjust sizes of primary particles of the lithium-titanium complex oxide, a preparation method thereof, and a lithium secondary battery comprising the same. Since a lithium-titanium complex oxide having reduced sizes of primary particles, the lithium-titanium complex oxide according to the present invention shortens a moving distance of lithium ions by adding the pore inducing material, diffusion rate of the lithium ions is increased. Thereby, a battery comprising the lithium-titanium complex oxide according to the present invention exhibits excellent output characteristics by having a structure favorable to electron transport.

The invention relates to a preparation method and application of chromium-doped sodium titanate with high cycle stability, the chromium-doped sodium titanate is formed by solid-phase sintering of Na2CO3, nano TiO2 and Cr2O3, and optimized Cr-Na2Ti3O7 has excellent cycle stability; the preparation method comprises the following steps: taking a certain amount of Na2CO3, nano TiO2 and Cr2O3 in a corresponding proportion, adding a small amount of isopropanol, and carrying out ball milling in a ball milling instrument for 5-8 hours; completely drying in a drying box, and putting the dried product into a tubular furnace; in a closed atmosphere of high-purity argon, carrying out solid-phase sintering for 10-12 hours by adopting a step-by-step calcination method, and naturally cooling to room temperature; when the material is used as a negative electrode of a sodium ion battery, the coordination environment of sodium ions can be changed, an interlayer Ti-O bond is optimized so as to optimize an interlayer structure, the irreversible capacity generated by Na2Ti3O7 in the charge-discharge cycle process is obviously reduced, and the cycle stability and the rate performance of the battery are improved; the preparation method has important significance for developing a high-performance negative electrode material of the sodium-ion battery and improving the performance of the sodium-ion battery.

The disclosure relates to barium strontium titanate, and to a barium strontium titanate fine particle powder, characterized in that the average primary particle size of the primary particles is 50 nm or less, and the difference between the theoretical lattice constant and the lattice constant is 0 Å or more and 0.0080 Å or less. The disclosure also relates to a method for producing a barium strontium titanate fine particle powder, characterized in that a titanium raw material is mixed with an alkaline aqueous solution, a neutralization reaction is performed to obtain a hydrous titanium hydroxide slurry, the slurry is washed with water and heated, the slurry is added to a mixed solution of an aqueous strontium solution and an aqueous barium solution, and a wet reaction is carried out at a temperature range of 100 to 300°C, followed by washing the slurry with water and drying the slurry.

The invention discloses a graphite composite material and a preparation method thereof, a negative plate, an electrochemical device and electronic equipment. The graphite composite material sequentially comprises an inner core, a first coating layer and a second coating layer from inside to outside, the inner core comprises porous graphite and a silicon simple substance, and at least part of the silicon simple substance exists in pores of the porous graphite; the first coating layer is a carbon coating layer; the second coating layer comprises lithium titanate; the silicon elementary substance accounts for 18%-27% of the mass of the graphite composite material; the mass percent of the lithium titanate in the graphite composite material is 0.5%-1.2%; the specific pore volume of the limited pores of the graphite composite material is 0.09 cm < 3 > / g to 0.21 cm < 3 > / g, and the limited pores refer to pores with the pore diameter of 0.2 nm to 5 nm. When the graphite composite material provided by the invention is applied to the lithium ion battery, the lithium ion battery has both capacity and long circulation.

The present invention relates to sodium-carbon metatitanate core-shell particles, their preparation methods, and their uses as an active anode material in sodium-ion batteries. (no figure)

A lithium titanium composite oxide including aluminum-coated primary particles and a method for manufacturing the same are disclosed. A lithium titanium composite oxide including aluminum-coated primary particles according to an embodiment is manufactured by coating lithium titanium oxide primary particles with aluminum by mixing an aluminum compound with re-pulverized particles and then by spray-drying the mixture again to prepare secondary particles. A battery including the lithium titanium composite oxide including the aluminum-coated primary particles exhibits effects of suppressing electrolyte decomposition and gas generation that may be respectively caused by titanium ions and residual lithium in conventional lithium titanium composite oxides.

A negative electrode active material for a secondary battery and a lithium secondary battery including the same. The negative electrode active material for a secondary battery, includes lithium titanium-based composite particles comprising: a lithium titanium oxide represented by LixTiyOz, wherein x, y and z satisfy 0.1≤x≤4, 1≤y≤5 and 2≤z≤12, Zr doped into the lithium titanium oxide; and an aluminum and sulfur containing compound coated on a surface of the lithium titanium oxide. The aluminum and sulfur containing compound is present in an amount of 0.4 mM to 0.9 mM based on 1M lithium titanium oxide.

A material comprising zirconium-doped lithium titanate, wherein the zirconium-doped lithium titanate contains zirconium in a concentration of 0.1-5 mol percent based on the sum of titanium and zirconium.

The invention provides a graphene-coated lithium titanate composite material and a preparation method thereof, and relates to the technical field of battery materials, the graphene-coated lithium titanate composite material comprises the following components by mass: 80-95 parts of a lithium titanate matrix, 1-10 parts of a graphene layer, and 0.5-5 parts of a dispersant; the surface of the lithium titanate matrix is coated with the graphene layer, and the dispersing agent is used for dispersing graphene in the graphene layer; the graphene layer is of a continuous and compact structure; by accurately controlling the number of graphene layers, the thickness of the coating layer and the use amount of the dispersing agent, the graphene forms a continuous and compact nano armor coating layer on the surface of the lithium titanate, so that the defect of low electronic conductivity of the lithium titanate is overcome, and the problem of conductive path breakage caused by graphene agglomeration is avoided; the two-dimensional flexible structure of graphene and the zero-strain characteristic of lithium titanate generate a synergistic effect, so that agglomeration and corrosion of lithium titanate particles in the circulation process can be effectively inhibited, and the volume micro-change during lithium ion intercalation and deintercalation is buffered.

The invention relates to an oxygen vacancy modified metal oxide material and a preparation method and application thereof, and the method comprises the following steps: placing a metal oxide in a strong reducing agent solution in an inert atmosphere environment for standing, after the reduction reaction is finished, removing redundant liquid on the upper layer, then adding a cleaning agent, stirring for a period of time, and then standing, so as to obtain the oxygen vacancy modified metal oxide material. Removing redundant liquid on the upper layer in the container; repeating the step for repeated cleaning for multiple times until the residual strong reducing agent on the surface of the oxide is cleaned; and collecting the metal oxide material, and carrying out vacuum drying to obtain the oxygen vacancy modified metal oxide material. The oxygen vacancy modified metal oxide material is applied to the field of energy storage. The method is simple in step, normal in temperature and pressure, low in cost, high in universality and capable of achieving large-scale production, and more importantly, the oxygen vacancy concentration of the metal oxide material can be accurately regulated and controlled by adjusting the reaction time and the raw material ratio; the prepared oxygen vacancy modified metal oxide material can be applied to the field of energy storage.

The present invention relates to a positive electrode active material for a secondary battery, a positive electrode including the same, a secondary battery, and a method for manufacturing the same, and more particularly to a positive electrode active material including a core and a nitrogen-containing lithium oxide-containing coating layer.

The embodiment of the present application relates to a calcium ion doped modified sodium lithium titanate material and a preparation method thereof, a negative plate and a battery, and belongs to the technical field of lithium ion battery negative materials.The embodiment of the present application aims to solve the technical problems of poor conductivity, low reversible capacity and poor cycle stability of sodium lithium titanate as a negative material in the prior art.The calcium ion doped modified sodium lithium titanate material of the embodiment of the present application has a chemical molecular formula of: Na2Ca x Li 2‑x Ti6O 14 , wherein the value range of x is 0 <= x <= 0.30.The material provided in the embodiment of the present application shows a higher discharge specific capacity, a lower internal resistance and a better cycle life in electrochemical tests, which indicates that the material has potential in the application of lithium ion batteries and can meet the performance and cycle life requirements.

Provided is a friction modifier capable of increasing, when used in a friction material, the coefficient of friction of the friction material in a high-load region. A friction modifier is made of a titanate, is a salt of at least one element selected from the group consisting of alkali metals and alkaline earth metals, and has a decomposition rate of not less than 30% by mass and not more than 100% by mass when heated at 800°C for an hour in a nitrogen atmosphere.

A process for removing Pb2+ ions from fluids is disclosed. More particularly, an intracorporeal process for removing Pb2+ ions from gastrointestinal fluids is disclosed. The process involves contacting gastrointestinal fluid with a titanate-based ion exchanger represented by the empirical formula: AmTiOz where A is sodium, potassium, lithium, magnesium, calcium, hydronium, or mixtures thereof. The alkali titanate ion exchanger is synthesized from specific Ti reagents, including nano-sized TiO2 and preformed spray dried TiO2 spheres, that impart properties such as favorable particle size and particle size distributions that are beneficial for treating the body.

The invention belongs to the technical field of lithium extraction, and particularly relates to a coated material and a preparation method thereof, a composite electrode and application thereof, and a capacitive deionization lithium extraction system and method. According to the method, a retired NCM positive electrode material is subjected to surface LTO modification to form an NCM (LTO) coated material, then the NCM (LTO) coated material is applied to a capacitive deionization lithium extraction system, and directional enrichment of Li < + > in the salt lake brine is realized through electrochemical driving. According to the technical scheme, material reutilization and lithium extraction functionalization are both considered, on the microstructure, the LTO layer provides stable Ti-O-Li key sites and electrochemical pseudocapacitance behaviors, and a selective lithium intercalation interface is formed; in a macroscopic process, a capacitive deionization system can realize reversible adsorption and desorption through potential control; and in the aspect of resource circulation, direct high-value utilization of retired battery materials and green development of salt lake lithium resources are realized.

The invention provides a mixed ion-electron conductor and a preparation method and application thereof, and belongs to the technical field of all-solid-state electrolyte. The preparation method comprises the following steps: firstly, carrying out ball milling treatment on sodium carbonate and titanium dioxide, and sintering to prepare Na2Ti6O13; and then mixing Na2Ti6O13 and hydride, grinding, tabletting and calcining to prepare the mixed ion-electron conductor. The valence state of titanium is effectively regulated and controlled through hydride, so that the proportion of Ti < 3 + > to Ti < 4 + > is changed, and the ionic conductivity and the electronic conductivity of the material at the room temperature are improved by introducing hydrogen.

The invention discloses a titanium lithium ion sieve and a preparation method thereof, and relates to the technical field of lithium ion adsorption. The method comprises the following steps: uniformly mixing a lithium source, anatase titanium dioxide, a tungsten source and carbon quantum dots, presintering at 290-350 DEG C for 50-80 minutes, heating to 550-750 DEG C, continuously calcining for 1.5-3 hours, and naturally cooling to obtain a precursor; and taking the precursor, eluting in a sodium thiosulfate aqueous solution, and drying the eluted solid phase to obtain the product. The titanium-based lithium ion sieve disclosed by the invention has relatively high adsorption rate and adsorption capacity and relatively low titanium solution loss, adsorption equilibrium can be achieved within 6 hours, the highest adsorption capacity can reach 40.06 mg / g, and the titanium solution loss is 0.52%.

The present invention provides a nanostructured titanic acid salt and a preparation process and use thereof. The process comprises the steps of: S1, preparing a dispersion containing titanium peroxy complex; S2, slowly adding a metal compound to the dispersion containing the titanium peroxy complex to form a solution; S3, adding an alcohol to the solution under normal temperature and normal pressure to produce the nanostructured titanic acid salt precursor precipitate in the solution, and separating the precipitate to obtain the titanic acid salt precursor; S4, drying the precursor, and then heat treating it to obtain the nanostructured titanic acid salt product. The present invention provides a process for preparing a titanic acid salt with simple preparation process, easy control for process parameters and easy large-scale industrial production.

The invention discloses a method for preparing a solid-state lithium ion battery polymer electrolyte by taking potassium titanate as a filler, and belongs to the field of lithium ion battery solid-state electrolyte materials. The method comprises the following steps: preparing a potassium titanate filler by adopting a solution-gel method, uniformly dispersing the potassium titanate filler in a solid electrolyte precursor solution, and forming the solid electrolyte membrane by adopting a solution pouring process. A uniform pore structure is formed in the obtained electrolyte, and a continuous lithium ion transmission channel is constructed, so that the migration ability and electrochemical performance of lithium ions are remarkably improved. Test results show that the ionic conductivity of the electrolyte at room temperature reaches 1.69 * 10 <-4 > S.cm <-1 >, the stable electrochemical window is widened to 4.62 V, and the specific discharge capacity is still maintained at 100 mAh.g <-1 > after 100 cycles at 1C multiplying power. The invention shows that the comprehensive electrochemical performance of the solid electrolyte can be effectively improved by introducing the potassium titanate filler, and the solid electrolyte has good research value and application prospect.

The present invention relates to a product, the crystallized part of which comprises crystallized phase Li2TiO3 comprising the elements Mn and Fe, said product comprising at least the elements Li, Ti, Fe, Mn and O, the elements Li, Ti, Fe and Mn being present in said product in the following amounts, determined by inductively coupled plasma spectrometry and stated in percentages by weight: - 11% < Li < 15%, - 28% < Ti < 45%, - 0.1% < Mn < 12%, - 0.15% < Fe < 9%, the mass ratio (Mn + Fe) / Ti being such that: 0.03 ≤ (Mn + Fe) / Ti ≤ 0.5.

A modified ternary and lithium manganese iron phosphate composite material and a preparation method and an application thereof. The material includes a modified ternary material and a modified lithium manganese iron phosphate material that are composite; wherein the modified ternary material includes a ternary material, a ternary material double-layer cladding layer, and ternary material doped metal ions; the ternary material double-layer cladding layer includes a ternary material metal oxide layer and a ternary material cationic cladding layer; the modified lithium manganese iron phosphate material includes a lithium manganese iron phosphate material, a lithium manganese iron phosphate double-layer cladding layer, and lithium manganese iron phosphate doped metal ions; the lithium manganese iron phosphate double-layer cladding layer includes a lithium manganese iron phosphate metal oxide layer and a lithium manganese iron phosphate cationic cladding layer.

Provided is a method for producing a highly active oxygen carrier at low cost, and a method for producing hydrogen and an apparatus for producing hydrogen using the highly active oxygen carrier. Solution A method for producing an oxygen carrier of the present invention is a method for producing an oxygen carrier formed of an activated iron titanate containing an alkali titanate and an iron oxide by calcining a mixture of iron titanate particles and an alkali component. The mixture of the iron titanate particles and the alkali component is prepared by any of: physically mixing the iron titanate particles and an alkaline compound; and spraying an aqueous solution of the alkaline compound to the iron titanate particles or impregnating the iron titanate particles with the aqueous solution of the alkaline compound and then drying the sprayed or impregnated iron titanate particles.

A process for removing Pb2+ ions from fluids is disclosed. More particularly, an intracorporeal process for removing Pb2+ ions from gastrointestinal fluids is disclosed. The process involves contacting gastrointestinal fluid with a titanate-based ion exchanger represented by the empirical formula:where A is sodium, potassium, lithium, magnesium, calcium, hydronium, or mixtures thereof. The alkali titanate ion exchanger is synthesized from specific Ti reagents, including nano-sized TiO2 and preformed spray dried TiO2 spheres, that impart properties such as favorable particle size and particle size distributions that are beneficial for treating the body.