374results about "Titanium compounds" patented technology

The invention provides a coated modified high-nickel ternary positive electrode material, a preparation method and a lithium ion battery, the coated modified high-nickel ternary positive electrode material comprises a high-nickel ternary matrix and a coating layer containing an oxide solid electrolyte, the coating layer is coated outside the high-nickel ternary matrix and accounts for 1%-3% of the mass of the high-nickel ternary matrix; the oxide solid electrolyte comprises Li < 3x > La < 2 / 3-x > TiO < 3 > (0 lt; x < = 0.16), Li < 7 > La < 3 > Zr < 2 > O < 12 >, Li < 1 + y > Al < y > Ti < 2-y > (PO < 4 >) < 3 > (0 lt; y < = 0.5); the ionic conductivity of the oxide solid electrolyte is greater than or equal to 1 * 10 <-4 > S / cm. The selected oxide solid electrolyte has high ionic conductivity and electronic insulativity, a rapid lithium ion transmission channel can be provided, interface side reaction can be inhibited, the rate capability and the cycling stability of the material can be remarkably improved, and when the oxide solid electrolyte forms a coating layer, the coating layer is not prone to deformation, and the service life of the material is prolonged. The interface bonding strength with a high-nickel ternary matrix can be improved through chemical bonding, the interface impedance can be remarkably reduced, and the dynamic performance of the material is improved.

The invention relates to a sodium ion battery, and belongs to sodium ion batteries. The battery cell of the sodium-ion battery comprises a positive plate, a negative plate and an electrolyte, the active material of the positive plate is carbon-coated aluminum-doped sodium ferric sulfate; the chemical formula of the aluminum-doped sodium ferric sulfate is Na < 2 + 2y > Fe < 2-x-y > Al < x > (SO4) 3, x is more than or equal to 0.01 and less than or equal to 0.05, and y is more than or equal to 0.1 and less than or equal to The particle size of the carbon-coated aluminum-doped sodium ferric sulfate ranges from 50 nm to 100 nm; the weight ratio of a carbon coating layer in the carbon-coated aluminum-doped sodium ferric sulfate is 1%-5%; the active material of the negative plate is carbon-coated sodium titanate; the specific surface area of the carbon-coated sodium titanate is 20 m < 2 > / g to 25 m < 2 > / g; the weight ratio of a carbon coating layer in the carbon-coated sodium titanate is 0.5%-3%. Volume expansion is jointly inhibited through structural stability of positive and negative electrode materials, and the cycle life is prolonged.

The invention discloses a double-site doped titanium lithium ion sieve adsorbent as well as a preparation method and application thereof. The adsorbent is a lithium removal product of a double-site doped titanium lithium ion sieve adsorbent precursor, the chemical general formula of the double-site doped titanium lithium ion sieve adsorbent precursor is Li (2-x) MxTi (1-y) NyOz, M is at least one of Na < + >, K < + >, Zn < 2 + >, Co < 2 + >, Ni < 2 + >, Mg < 2 + > and Al < 3 + > and occupies Li site, N is at least one of Cr < 3 + >, Fe < 3 + >, Zr < 4 + >, Nb < 5 + >, Ta < 5 + >, V < 5 + >, Mo < 6 + > and W < 6 + > and occupies Ti site, x is larger than or equal to 0.001 and smaller than or equal to 0.5, and y is larger than or equal to 0.001 and smaller than or equal to 0.5. Metal cations are introduced to replace Li sites and Ti sites at the same time, Li site substitution enlarges interlayer spacing and improves Li < + > diffusion rate, Ti site substitution regulates local chemical bond and electron distribution, stabilizes lattice structure and enhances electron conduction, and through double-site doping, 'ion-electron 'double channels are constructed, so that a collaborative optimization effect is achieved. The double-site doped titanium lithium ion sieve adsorbent disclosed by the invention is applied to adsorption and extraction of lithium in a Bayer process sodium aluminate solution, and the adsorbent shows excellent adsorption performance.

In order to solve the problems that an existing positive electrode material is unstable in structure and low in energy density, the invention provides a positive electrode material and a preparation method thereof, a positive electrode plate and a battery, the positive electrode material comprises lithium cobalt oxide of a layered structure, the chemical formula of the lithium cobalt oxide is Li < 1-alpha-beta > Na < alpha > (Mg < gamma > Ti < delta > Co < 1-gamma-delta >) O2, alpha is smaller than or equal to 0.005, and beta is 0.02-0.05; gamma is equal to 0.002 to 0.004, delta is equal to 0.001 to 0.003, and gamma + delta is equal to 0.003 to 0.006.

The invention discloses a polydopamine modified metatitanic acid type lithium ion sieve and a preparation method thereof, and belongs to the technical field of lithium ion sieves, the preparation method comprises the following steps: grinding and uniformly mixing lithium acetate dihydrate and titanium dioxide in an organic solvent, and calcining the mixture at 650-800 DEG C for 3-5 hours to prepare a Li2TiO3 precursor; the preparation method comprises the following steps: putting dopamine hydrochloride, aminated crown ether and a Li2TiO3 precursor into a tris (hydroxymethyl) aminomethane solution with the pH value of 8-9, carrying out a constant-temperature oscillation reaction, carrying out suction filtration, and drying at low temperature, so as to obtain the polydopamine modified metatitanic acid type lithium ion sieve. According to the lithium ion sieve, the adsorption effect on lithium ions can be improved, the lithium extraction efficiency is improved, and the problem of low adsorption capacity of a lithium ion sieve in the prior art is solved.

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 discloses a high-magnification sodium ferric phosphate pyrophosphate-barium titanate positive electrode material and a preparation method thereof, the high-magnification sodium ferric phosphate pyrophosphate-barium titanate positive electrode material comprises nano barium titanate compounded with sodium ferric phosphate pyrophosphate in situ, the sodium ferric phosphate pyrophosphate is of a porous structure, and the mass ratio of barium titanate in the porous sodium ferric phosphate pyrophosphate is 0.5-6 wt%. The nano barium titanate is introduced into the porous ferric sodium phosphate pyrophosphate through an in-situ compounding technology, so that the rate capability, the cycle capability and the ionic conductivity of the ferric sodium phosphate pyrophosphate-barium titanate positive electrode material are remarkably improved, and the rate capability during high-current charging and discharging is particularly optimized; and effective support is provided for high-power output in a short time and stability of long-time circulation.

A positive electrode material 1000 in one embodiment of the present disclosure comprises a positive electrode active material 110, a coating layer 111 that includes a first solid electrolyte and covers at least part of the surface of the positive electrode active material 110, and a second solid electrolyte 100. The first solid electrolyte contains Li, M1, and F. M1 is at least one selected from the group consisting of Ti, Al, and Zr. The second solid electrolyte 100 contains Li, M2, O, and X. M2 is at least one selected from the group consisting of Ta and Nb. X is at least one selected from the group consisting of F, Cl, Br, and I.

The invention discloses a preparation method of a lithium aluminum titanium phosphate solid electrolyte nano powder material, which comprises the following steps: S1, weighing a lithium source, an aluminum source, a titanium source and a phosphorus source, and preparing a sol precursor; s2, performing microwave treatment to obtain a gelatinous intermediate; s3, carrying out annealing treatment after grinding to obtain nano titanium aluminum lithium phosphate powder; s4, placing the substrate in a plasma enhanced atomic layer deposition reaction cavity, vacuumizing, and introducing plasma activation gas; alternately pulse trimethylaluminum and titanium tetrachloride precursors, and depositing to obtain a gradient oxide intermediate layer; s5, introducing oxygen plasma to oxidize the residual precursor to form a gradient oxide coating layer; and S6, carrying out annealing treatment to obtain the lithium titanium aluminum phosphate solid electrolyte nano-powder material. According to the preparation method disclosed by the invention, the side reaction of the LATP powder and lithium metal is effectively inhibited, the interface stability and the ionic conductivity are improved, and the high-performance requirement of an all-solid-state lithium ion battery on a solid electrolyte material can be met.

The invention discloses a method for preparing a carbon-coated lithium titanate negative electrode material by a one-step solid phase method, and belongs to the technical field of lithium ion battery materials. The method comprises the following steps: uniformly mixing and dispersing carbon-containing lithium salt, titanium salt and metal hydride to obtain a solid mixture; and roasting the obtained solid mixture in a protective atmosphere to obtain the carbon-coated lithium titanate negative electrode material. According to the preparation method, a certain amount of metal hydride is added into the reaction raw materials, a high-temperature solid-phase method is used, and carbon in the carbon-containing lithium source is reduced by the metal hydride to serve as a carbon source, so that the carbon-coated lithium titanate negative electrode material can be directly synthesized in one step, additional carbon sources and technological processes are not needed, and the preparation technology is greatly simplified.

The invention discloses a method for synthesizing nano magnesium dititanate by a solid phase method, which comprises the following steps: S1, weighing a titanium-containing solid compound, a nano magnesium oxide solid and a hydrolytic alkaline solid compound, uniformly mixing, adding a surfactant, and grinding to obtain a solid mixture; s2, adding a mixed solution with an alcohol-water ratio of 1: 1 into the solid mixture, and grinding to obtain mixed slurry; s3, transferring the mixed slurry into a centrifugal tube, placing the centrifugal tube in a centrifugal machine for centrifugal separation, pouring out supernatant after the centrifugal separation is finished, and obtaining a mixed product after a water washing process and an alcohol washing process are finished; s4, soaking the mixed product in an inorganic acid solution, transferring the soaked mixed product into a centrifugal tube for centrifugal separation, sequentially completing water washing and alcohol washing processes, and then drying to obtain MgO-coated TiO2 with a core-shell structure; s5, carrying out high-temperature calcination on the obtained MgO-coated TiO2 to obtain a nano magnesium dititanate solid; according to the invention, the problems of large particle size and non-uniform chemical composition of the magnesium dititanate powder prepared in the prior art are solved.

An embodiment of the present invention pertains to a titanate compound fine particle powder containing a modified titanate compound powder. Specifically, the titanate compound fine particle powder provides a titanate compound powder dispersion capable of suppressing, with a small amount of a polymer dispersant, the aggregation and re-aggregation of particles. Another embodiment of the present invention pertains to a titanate compound powder dispersion that exhibits excellent dispersibility in various solvents. Still another embodiment of the present invention pertains to an economically and industrially advantageous method for producing a titanate compound fine particle powder. Provided is a titanate compound fine particle powder that contains a modified titanate compound powder including cellulose nanofibers and a titanate compound powder. The cellulose nanofibers and the titanate compound adhere to or adsorb to each other. The ratio of the total carbon content of the titanate compound fine particle powder and the BET specific surface area of the titanate compound fine particle powder is 0.006 or less. Also provided is a method for producing the titanate compound fine particle powder, the method including mixing an unmodified titanate compound powder and the cellulose nanofibers, and then drying the mixture.

A negative electrode composition is provided. [Solution] The negative electrode composition includes composition particles and dispersed particles, both of which are active materials. The composition particles include a lithium-titanium composite oxide, which includes lithium and titanium. The dispersed particles include a structural element composite oxide, which includes a structural element, which includes tin and at least two elements selected from the group consisting of magnesium, aluminum, silicon, calcium, chromium, manganese, iron, cobalt, nickel, copper, zinc, gallium, and germanium. When certain conditions are met, the composition contributes to improving the safety, service life, stability, and capacity of the battery.

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 relates to the technical field of spectroscopy and molecular recognition, in particular to an SERS (Surface Enhanced Raman Scattering)-based technology. The invention provides an SERS (Surface Enhanced Raman Scattering) substrate for detecting various biomass molecules, which is characterized in that a chain polymer is used as a soft template, and a metal monatomic head-to-head local self-assembly structure is formed on the surface of a carrier. The structure not only promotes mutual proximity between metal single atoms, but also physically blocks aggregation of the metal atoms to the cluster structure in a manner of passivating the surface of the carrier. Charge redistribution between adjacent metal single atoms regulates and controls the electronic state of the surface of the whole semiconductor substrate, and then efficient photoinduced charge transfer is induced, so that low-frequency Raman signals of biomass molecules are amplified.

The present invention provides a piezoelectric nanogenerator based on coaxial heterostructured composite piezoelectric fibers, a preparation method, and a wireless sensing system. This preparation method involves coating the surface of BT with a layer of Ag nanoparticles, spinning the fibers using a coaxial needle, and finally producing a PENG (Peng). This method increases the effective polarization voltage of the piezoelectric particles during polarization and enhances stress transfer within the particles. This method exhibits high piezoelectric output performance, enabling the application of PENG in wireless sensing systems and scalable industrial applications.

An electrode 100 of the present disclosure includes a first active material 1, a second active material 2, and a coating material 3. The first active material 1 has a surface of which 0% or more and less than 35% is coated with the coating material 3, and the second active material 2 has a surface of which 90% or more is coated with the coating material 3. The coating material 3 includes Li, Ti, M, and F, where M is at least one selected from the group consisting of Ca, Mg, AI, Y, and Zr.

The invention provides a hydrogen interstitial doped strontium titanate material and a preparation method thereof, the hydrogen interstitial doped strontium titanate material is prepared by doping a hydrogen element into a strontium titanate single crystal through a solid-phase reaction, and the hydrogen element is introduced into a strontium titanate lattice interstitial site by using sodium borohydride as a hydrogen source. According to the hydrogen gap doped strontium titanate material disclosed by the invention, the carrier concentration is obviously increased, the absorption of the material in a range from visible light to infrared light is enhanced by doping, and the photon utilization rate is improved. Compared with heavy metal displacement doping and hydrogen ion gap doping, the carrier mobility is not damaged, environmental protection is easy, the cost is low, doping conditions are not harsh, and large-scale industrial production is easy.

To provide a liquid composition for forming a BCTZ film, which can control the crystal particle size and form a BCTZ film with stable properties, a method for producing the liquid composition for forming a BCTZ film, and a BCTZ film, and a method for producing the BCTZ film.SOLUTION: A liquid composition for forming a BCTZ film is provided, in which barium carboxylate, calcium carboxylate, a titanium alkoxide and a zirconium alkoxide are mixed in an organic solvent in a molar ratio of Ba:Ca:Ti:Zr=(1-X):X:(1-Y):Y (0.03≤X≤0.20, 0.05≤Y≤0.25) and a stabilizer is added. The barium carboxylate and calcium carboxylate are metal salts of carboxylic acids represented by the general formula CnH2n+1COOH (5≤n≤7). The organic solvent is a mixed solvent containing a carboxylic acid and an acetate.SELECTED DRAWING: None

The present invention discloses a high-rate sodium iron phosphate pyrophosphate-barium titanate cathode material and its preparation method. The material comprises nano-barium titanate in-situ composited with sodium iron phosphate pyrophosphate. The sodium iron phosphate pyrophosphate has a porous structure, and the mass proportion of barium titanate in the porous sodium iron phosphate pyrophosphate is 0.5-6wt%. The present invention introduces nano-barium titanate into the porous sodium iron phosphate pyrophosphate through an in-situ composite technique, significantly improving the rate performance, cycling capacity, and ionic conductivity of the sodium iron phosphate pyrophosphate-barium titanate cathode material. The material particularly optimizes the rate performance during high-current charge and discharge, effectively supporting high-power output in a short period of time and long-term cycling stability.

The method for producing a halide solid electrolyte according to the present disclosure comprises: (A) halogenating an oxide mixture containing a composite oxide containing Li and Ti and an oxide raw material containing Li and M, thereby obtaining a halide solid electrolyte containing Li, Ti, M, and X; here, M is at least one element selected from the group consisting of metal elements (excluding Li and Ti) and metalloid elements, and X is at least one element selected from the group consisting of F, Cl, Br, and I.

The present disclosure discloses provides a solid-state electrolyte material and a preparation method thereof, a cathode active material, a cathode plate, a solid-state battery, and an electrical device. The solid-state electrolyte has a NASICON crystal structure. In an X-ray diffraction pattern of the solid-state electrolyte material, the solid-state electrolyte material has a characteristic diffraction peak exhibit at a diffraction angle 20 values of 14.5 ° to 14.8 °, a characteristic diffraction peak at a diffraction angle 20 value of 19.5 ° to 19.7 °, and a characteristic diffraction peak at a diffraction angle 20 value of 22.5 °to 22.8 °. A ratio of a peak intensity I1 of the characteristic diffraction peak at a 20 value of 14.5 °to 14.8 °to a peak intensity I2 of the characteristic diffraction peak at a 20 value of 22.5 °to 22.8 °satisfies: 1.5≤I2 / I1≤3. Thus, an ionic conductivity and structural stability of the solid-state electrolyte are improved.

To provide a BTO particle which has high thermal stability and a small crystallite diameter.SOLUTION: A barium titanate particle dispersion having a perovskite structure according to the present invention includes barium titanate particles having the perovskite structure and a solvent. The barium titanate particles have a crystallite diameter of 25 nm or less. A part of titanium present at B sites in the perovskite structure is replaced with a metal element other than titanium.SELECTED DRAWING: None

The present invention is based on Na2Ti7O 15 This paper describes a doped sodium titanate electrode material, its preparation and use. The electrode material has a porous block structure stacked with nanorods and is synthesized by a simple solid-state method using proportional ball milling of precursors sodium carbonate and anatase titanium dioxide followed by microwave sintering in air. The resulting Na2Ti7O 15 The addition of Na increases the exposure of the (100) sodium storage crystal plane of Na2Ti3O7 sodium titanate and decreases the exposure of the (003) crystal plane, resulting in Na2Ti7O 15 has four TiO6 octahedra in one structural unit, providing more sodium storage sites and wider sodium ion diffusion channels, improving the specific capacity and rate performance of the material. 15 The TiO6 octahedra in the upper and lower layers are connected to each other, making the structure more stable during the sodium ion insertion / extraction process, thereby improving the long-term cycling stability of the material.

The application discloses a method for preparing metatitanic acid with stable particle size from concentrated titanium liquid in titanium dioxide production, and particularly relates to the technical field of titanium dioxide production. First, the concentrated titanium liquid and alkali liquid are respectively preheated to 85-95 DEG C, the concentrated titanium liquid is added into the alkali liquid, the temperature is maintained at 95-120 DEG C for reaction, the reaction time is 5-10 min, and the crystal seed is obtained when the detection of crystal seed stability reaches below 100 ml water / 10 ml titanium liquid; then the crystal seed obtained in step one is added into the concentrated titanium liquid, and the stirring, pressurizing and heating are carried out for reaction, the reaction time is 15-60 min, and the reaction is kept for maturation after the reaction is completed; finally, the titanium liquid after the reaction in step two is cooled, and metatitanic acid with stable particle size is obtained after filtration.

To provide an aqueous solution for solution processing for forming a conductive oxide thin film having high density, high optical transmittance, low surface roughness, and good electronic properties, as well as the formed thin film and a method for forming the thin film.SOLUTION: A precursor solution for producing a conductive oxide thin film is prepared from metal salts comprising indium, tin, titanium, and cadmium salts, and numerous combinations thereof. These salts have purity levels of at least 99% to at least 99.999%. These salts may be metal nitrates, or they may be metal halides such as chlorides. The solution is aqueous. The solution may be an aqueous solution comprising In(NO3)3, and at least one of SnCl2 and SnF2. The solution may be an aqueous solution comprising In(NO3)3 and TiCl3. The solution may be an aqueous solution comprising Cd(NO3)2, and at least one of SnCl2 and SnF2.SELECTED DRAWING: Figure 1

This application relates to the field of electronic materials for multilayer ceramic chip capacitors, and specifically to a method for manufacturing a modified nickel paste for MLCCs. The method for manufacturing a modified nickel paste for MLCCs includes a nano-BaTiO3 preliminary dispersion step of uniformly mixing and dispersing nano-BaTiO3 powder, a diluent, and a dispersant in a specific mass ratio to obtain a nano-BaTiO3 preliminary dispersion, and a step of mixing, dispersing, and filtering a BaTiO3 preliminary dispersion, an adhesive, a dispersant, a diluent, and nickel powder in a specific mass ratio to obtain a modified nickel paste for MLCCs. In this application, first, the nano-BaTiO3 powder is preliminarily dispersed with a dispersant to obtain a uniformly dispersed nano-BaTiO3 preliminary dispersion, and then the nano-BaTiO3 preliminary dispersion is mixed with nickel powder and other raw materials in the above ratio and dispersed with a three-roll mill to obtain a uniformly dispersed nickel paste, thereby solving the problem that the nano-BaTiO3 powder is not uniformly dispersed in the nickel paste for MLCCs.

This invention discloses a composite modified lithium manganese oxide cathode material, its preparation method, and its applications, belonging to the field of cathode material technology. The structural formula of the composite modified lithium manganese oxide cathode material is: LiX a O b @LiYO2 / LiMn2O4, comprising: a core composed of LiYO2 and LiMn2O4, and LiX coating at least a portion of the surface of the core. a O b The coating layer; wherein: LiMn2O4 has a porous structure, and LiYO2 fills the channels of LiMn2O4. The cathode material in this invention uses lithium manganese oxide as a matrix, with LiYO2 filling the channels of the matrix, and LiX coated on the surface of the matrix. a O b Filling the pores with LiYO2 can reduce the Jahn-Teller effect of lithium manganese oxide without affecting the specific capacity of the cathode material. Moreover, LiYO2 can accelerate the lithium-ion diffusion rate, thereby improving the rate performance of the material.

The application discloses a kind of preparation methods of lead-free environmental protection Cs2TiBr6 double perovskite film, it includes the following steps: CsBr powder and TiBr4 Powder are added to beaker equipped with gamma-butyrolactone solvent and magnetically stirred to be completely dissolved, then slowly add anhydrous acetonitrile as anti-solvent and constant temperature heating is placed on heating table, after seed microcrystal precipitates, pour out solution, use acetone to flush seed microcrystal after, and dry after standing;Seed microcrystal, CsBr powder and TiBr4 Powder are added to N, N-dimethylformamide solvent, and be loaded into centrifugal tube and centrifuged, pour out supernatant after centrifugation and the precipitate is dried, obtain Cs2TiBr6 microcrystal;Cs2TiBr6 microcrystal is added to the mixed solution of cyclohexane and isopropyl alcohol with certain mass ratio, and magnetically stirred to make microcrystal fully dispersed, obtain Cs2TiBr6 precursor solution;Cs2TiBr6 precursor solution is added dropwise to substrate and spin-coated, then the substrate is placed on heating table and annealed, to obtain Cs2TiBr6 film.The advantages are that, compared with existing film preparation technology, 1) no need of thermal evaporation coating machine and double source co-evaporation process, low cost and simple process;2) will not corrode substrate material;3) the thickness of prepared Cs2TiBr6 film is 8-10 μm, suitable for use in optoelectronic devices.

This invention provides a technology for producing photocatalytic particles with high oxygen-generating activity. [Solution] A method for producing photocatalytic particles according to one aspect of the present invention is a method for producing photocatalytic particles comprising supporting a co-catalyst on photosemiconductor particles having a composition represented by the following general formula (I), comprising: an oxidation treatment step of oxidizing the photosemiconductor particles; and a co-catalyst supporting step of supporting the co-catalyst on the photosemiconductor particles after the oxidation treatment step, wherein the oxidation treatment step is performed by carrying out at least one of the following (i) and (ii): (i) oxidizing the photosemiconductor particles in an oxidizing agent solution; (ii) oxidizing the photosemiconductor particles by heating them in an oxidizing atmosphere at a temperature greater than 300°C and 450°C or less. M a Ti b O c S d …(I) (However, M is one or more combinations selected from Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, and Y, and is a number with a=1.7~2.3, b=2, c=4.7~5.3, and d=1.7~2.3.)