342results about How to "Easy to dope" patented technology

The invention discloses a modified high-nickel positive electrode material coated with a fast ion conductor and a preparation method of the modified high-nickel positive electrode material. The high-nickel positive electrode material comprises a substrate, wherein the substrate is a compound LiNi<1-x-y>Co<x>Mn<y>M<z>O<2> shown in a formula I, in the formula I, x is more than 0 but less than or equal to 0.20, y is more than 0 but less than or equal to 0.20, z is more than 0 but less than or equal to 0.1, and M is arbitrary one or more of elements of Al, Mg, Ti, Zr, Mn, Ni, Sn, Co, Zn, W, Mo, Ru, Ca, Sr, Ba, B, Y, V and Nb. The preparation method comprises the following steps of washing and drying the high-nickel positive electrode material, uniformly mixing the high-nickel positive electrode material and an appropriate amount of coating agent, and performing sintering and sieving to obtain the modified high-nickel positive electrode material coated with the fast ion conductor. The fastion conductor is coated by washing and surface drying methods, the alkali amount of a surface of the positive electrode material is reduced, side reaction of the material and an electrolyte is reduced, and the high-temperature stability and the safety of the material are improved; and by doping and coating the surface with the fast ion conductor, the energy density, the rate performance and the cycle property of the material are improved, and the long cycle lifetime of a battery is finally prolonged.

The invention discloses a solid-phase synthetic method of a highly ordered mesoporous carbon material. The solid-phase synthetic method comprises the following steps: 1) mixing a structure-directing agent with a high molecular monomer used as a carbon source, and grinding for 5-180 min at 10-100 DEG C; 2), heating for 0.5-120 h at 40-380 DEG C; 3) under the protection of inert gases, rising the temperature to 500-2,100 DEG C at the temperature rising speed of 1-40 DEG C/min, and roasting for 2-10 h at high temperature. The functionalization mesoporous carbon material is synthetized through the organic-organic self-assembly between the high molecular monomer and the structure-directing agent and between the low polymer of the high molecular monomer and the structure-directing agent, and the mechanical grinding. The solid-phase synthetic method is simple to operate, efficient, and low in cost, and the prepared mesoporous carbon material has a highly ordered mesoporous channel, high specific surface area (500-2,500 m<2>/g and large pore volume (pore diameter of 2.5-20 nm and pore volume of 0.1-2.5 cm <3>/g).

The invention provides a preparation device for preparing functional micro-nano materials on silicon surfaces based on femtosecond laser and a method. When the device is used for preparation, scanning speed reaches 4mm/s, and is increased by 20 times as compared with scanning speed when micro-nano materials are prepared in a traditional method. Simultaneously, supersaturation doping of the silicon material surface and preparation of micro-nano structures of the surfaces are realized during preparation, prepared micro-nano materials can absorb 90% of light with wavelength ranging from 200nm to 2500nm, and silicon materials without scanning traces on surfaces can be obtained. The preparation device and the method are exquisite in design and easy to control, and the prepared materials can be applied to solar cells, detectors, field emission devices and the like in the photoelectric industry.

The invention relates to a molybdenum trioxide coated molybdenum doped titanium dioxide nano composite particle. The surface of a trivalent molybdenum ion doped titanium dioxide nano particle is coated with molybdenum trioxide, titanium dioxide is a mixed phase composed of an anatase phase and a rutile phase, and a sintered interface is arranged among titanium dioxide particles and is of a chain structure. A flame spraying combustion technology is adopted, and the molybdenum trioxide coated molybdenum doped titanium dioxide nano composite particle can be rapidly and continuously prepared; a synergistic effect is played to the greatest extent; and the conductivity of TiO2 is improved, an extra lithium insertion space is provided by the TiO2 and MoO3 grown on the surface, the specific capacity is improved, high electrochemical activity and high rate performance of a material are ensured, and the molybdenum trioxide coated molybdenum doped titanium dioxide nano composite particle has excellent rate performance and cyclic stability when applied to the field of an anode material of a lithium ion battery.

The invention discloses a catalyst for synthesising methanol by hydrogenation of carbon dioxide. The catalyst is composed of oxides with the following molar ratio based on metal: 20-50% of La, 0-10% of M, 15-35% of Cu, and 2-15% of Zn, wherein M is one or more of Zr, Y, K, Ag, Ce, Pd, Mn, Mg, Fe, Co, Ni or Cr. The catalyst disclosed by the invention has the advantages that preparation is simple, operation is easy, catalyst performance repeatability is good, industrial amplification is easy to realize, and reaction conversion rate and reaction selectivity are high.

This invention belongs to battery field, which relates to ultra-micro compound lithium iron phosphate cathode material with high density and its fabrication method. Said cathode material is prepared by mixing iron salt, lithium salt and phosphates at a P/Li/Fe ratio of 1-1.1:1-1.1:1-1.1, adding conductive additives containing dopant element and carbon-bearing organic compound, adding organic acid as carrier, adjusting pH, controlling solution temperature in reactor to form sol, separating the sol to obtain nano-precursor and placing it into micorwave oven under protection of inert gas, and obtaining the final product. It is easy to control the chemical component, phase composition and particle size distribution. The conductive additive can be well-distributed. The method also has the advantages of short reaction time, low energy consumption during synthesis process and low cost. The obtained composite has high purity and good compatibility with electrolyte, excellent conductive property and charge and discharge property with large current, and good structure stability,thermal stability and cycle performance.

The invention discloses a method for increasing fluorescence yield and stability of a non-lead halogen perovskite material. The method is characterized by comprising steps as follows: rare earth elements RE are introduced into non-lead halogen perovskite A3B2X9, and rare earth element doped non-lead halogen perovskite is formed; B is one of Bi and Sb, and X is one of Cl, Br and I. According to themethod, by means of improvement of the addition quantity and substitution sites of the rare earth elements RE in a non-lead halogen perovskite material product, whole process design of the preparation method as well as parameters and conditions of each step, rare earth ions are utilized to regulate metal-halogen octahedron distortion degree of non-lead perovskite and change the metal ion crystalfield environment, and compared with the prior art, fluorescence yield and stability of the non-lead halogen perovskite material can be increased effectively.

The invention which relates to a preparation method of a composite conductive fabric with spray polymerization belongs to the technical field of textiles. An atomization mode is adopted in the invention to atomize a monomer solution into particles, and an in situ polymerization reaction is initiated on a monomer under the effect of an oxidant deposited in the fabric to prepare the composite conductive fabric. The preparation method of the invention which has the advantages of easy controlled condition, simple operation, low raw material cost, and less energy consumption is suitable for the large scale and industrial production. Compared with routine products prepared with a liquid-phase oxidation method, the adhesion between a conducting layer and a fabric matrix of the composite conductive fabric prepared in the invention is substantially improved, the conducting layer is more compacted, and protrude wear resistances and solvent resistances are possessed; the surface resistor of the preparative composite conductive fabric is 10-10<5>omega/cm<2>, the conductivity is good, the electromagnetic shielding property and the flexibility of a product (the composite conductive fabric) are good, and the surface resistor of the product in the invention is sensitive to the change of pressure, elasticity and the like, so the product can be widely applied to the sensor field, the antistaticfield, the anti-electromagnetic shielding field and the like.

The invention discloses a preparation method of a Yb3+ doped silica fiber preform mandrel. The preparation method comprises the steps that silicon oxide powder doped with rare earth and co-doping agent Al, P and the like is prepared; decarbonization, dehydroxylation and ball-milling treatment are carried out; high-temperature purification is carried out; the purified powder biscuit is smelted at a high temperature to form glass, and the glass is prepared into the mandrel. The Yb3+ doped silica fiber preform mandrel with the diameter range of 3-18 mm and the length range of 50-300 mm can be prepared, the doping evenness of the mandrel is quite good, and the refractive index fluctuation of the mandrel delta n is smaller than 2*10<-4>. Correspondingly, the mandrel and a pure silica glass sleeving bar are adopted, the preform is prepared through a pipe-bar method, after optical fiber is formed through drawing, the refractive index evenness delta n of the optical fiber exceeds the detection limit of an instrument, and the back bottom loss of the optical fiber at the 1200 nm position is lowered from 0.5-1 dB to 0.05 dB/m and reaches the loss level of MCVD technology.

The invention relates to a preparation method of a tin oxide fiber precursor and tin oxide crystal fibers. The preparation method comprises the following steps: carrying out a replacement reaction on halides of tin and potassium (sodium) acetate to synthesize the tin oxide fiber precursor which takes acetic acid as a ligand; concentrating a precursor solution to obtain a spinning solution and carrying out centrifugal silk spinning to obtain tin oxide precursor fibers; and carrying out procedures of special atmosphere pre-treatment, high-temperature heat treatment and the like on the precursor fibers to obtain the tin oxide crystal fibers. According to the preparation method, the long-diameter ratio of the tin oxide crystal fibers is greater than 1000, the tensile strength of the fibers is 0.8GPa-1.1GPa, the whiteness of the fibers is good and the color and luster of the fibers are soft. The preparation method is simple in preparation process, moderate in condition and stable in quality of fibers in batches; spinning sol does not go bad after being placed for a long time. The tin oxide crystal fibers can be applied to the fields of photocatalysis, air sensitivity, humidity sensitivity and the like. The tin oxide fiber precursor can also be used for preparing oxide thin films, nano powder and nano wires or preparing tin-containing functional materials including nano tin oxide fibers and the like by an electrostatic spinning method.

The invention discloses vanadate red phosphor, a preparation method and application. The molecular formula of Eu3<+>activated vanadate red phosphor is as follows: NaM<II>La1-x-y (VO4) 2: Eux, R<III>y, wherein M<II> is one or more than one of Mg<2+>, Ca<2+>, Sr<2+>, Ba<2+> and Zn<2+>, R<III> is at least one of Sm<3+>, Gd<3+>, Tb<3+>, Dy<3+>, Lu<3+> and Y<3+>, x is Eu<3+> doped mole percentage coefficient, which is greater than or equal to 0.0001 or less than and equal to 0.6, and y is R<III> replaced La<3+> mole percentage coefficient, which is greater than or equal to 0.0001 and less than or equal to 0.6. In the invention, the emission wavelength of the vanadate red phosphor is mainly 619nm, very strong excitation can be produced when the emission wavelength is about 400nm-450nm, the emission wavelength is fit with the emission wavelength of an LED (Light-emitting Diode) chip with near ultravoilet light and blue light, and the light-emitting efficiency is high. The invention has a simple manufacturing method and good repeatability. The obtained product has stable quality, and is easy for operation and industrial production.

The invention discloses a low-temperature preparation method of Co ferrite Nano powder. Co(CH3CO2)2.4H2O, Fe(NO3)3.9H2O and poly-hydroxyl carboxylic acid are used as raw materials, and analytically pure ethylene glycol methyl ether and water are mixed to be used as a solvent, wherein the volume ratio of the analytically pure ethylene glycol methyl ether to water is (7-9):1. The preparation method comprises the following steps of: firstly, dissolving Co(CH3CO2)2.4H2O and Fe(NO3)3.9H2O in the mixed solvent; secondly, adding poly-hydroxyl carboxylic acid to the solution, slowly dropping analytically pure ammonia water to the solution under a stirring condition, adjusting the pH value to approximate 6, and slowly evaporating the solution to form the brown sol in a water bath at 70 DEG C; thirdly, heating the sol to 130 DEG C or refluxing for 12h till the sol forms the brownish black xerogel, transferring the xerogel to an oven at 250 DEG C, wherein the xerogel can combust automatically to produce the dendritic and bulking products, and grinding the products to obtain the Co ferrite Nano powder. The low-temperature preparation method of the Co ferrite Nano powder has simple process, low cost, easily controllable chemical constituent, good repetition and easy doping; and the particle of the prepared product has good dispersibility, uniform size and good magnetic properties.

The invention provides a method for indirect synthesis of quartz glass, a special equipment used therein and a quartz glass, which belongs to the field of fabrication of glass. The method comprises the following steps: 1) allowing the feed gas of silicon tetrachloride to react in oxyhydrogen flame with a temperature of 600 to 1200 DEG C, enabling silicon tetrachloride to undergo hydrolysis or oxidation so as to produce nanometer silica particles and depositing the nanometer silica particles so as to obtain a silica loose body; and 2) carrying out dehydration, degassing and vitrification on the silica loose body at a temperature of 100 to 1600 DEG C under a vacuum degree of 0.01 to 500 Pa so as to obtain the quartz glass. According to the invention, a deposition rate in the method can reach 500 to 2000 g/h, and the obtained quartz glass has the following excellent characteristics: high transmittance is obtained at 200 to 3200 nm full spectrum (ultraviolet-visible-infrared bands), the content of metal impurities is less than 5 ppm, the content of hydroxyl groups is controlled to be within 20 ppm, a diameter is up to 50 to 200 mm, and the quartz glass can be used in the field of high and new technologies like precision optics, semiconductor photolithography and laser technology and has a wide application prospect.

The invention relates to a preparation method of an NCM ternary cathode material doped with Al<3+> on the surface and belongs to the field of chemical energy storage batteries. The preparation methodprovided by the invention has the benefits that aluminum nitrate is added in the mixing process of a nickel-cobalt-manganese hydroxide precursor and lithium hydroxide to realize the doping of the Al<3+> on a lithium layer on the surface; compared with the situation that the Al<3+> is doped on a transition metal layer in the preparation process of the nickel-cobalt-manganese hydroxide precursor, the Al<3+> exists on the lithium layer and can better play a supporting role, less Al<3+> can be used to achieve a structure stabilizing effect, and particularly, and the improvement effect on electrochemical performance at high voltage and high rate is significant. The preparation method provided by the invention is simple to operate, a process and a technology are easy to realize, the large-scalecommercial application can be realized, and the method can be used for Al<3+> doping on the surface of other ternary cathode materials or a lithium-rich cathode material.

The invention provides a lithium ion battery positive electrode material additive, a lithium ion battery positive electrode material prepared by the positive electrode material additive, a positive electrode and a battery. The additive includes a lithium-containing additive, the lithium-containing additive is Li2Mo1-0.75xBxO3, wherein 0.04<=x<=0.3, the problem of irreversible capacities of the lithium ion battery can be effectively solved, the additive is simple and convenient in process, lower in cost and higher in safety, and the energy density of the battery can be remarkably improved.

The invention provides a low-temperature type lithium iron phosphate anode material and a preparation method of the low-temperature type lithium iron phosphate anode material. The method comprises the following steps of: proportioning lithium carbonate, metallic oxide, iron phosphate and glucose according to the molar ratio as follows: Li: R: Fe: P: C= (1.1-x): x: 1: 1: 0.8, wherein x=0.01-0.03, C is C in the glucose, and R is a doped metal ion; directly mixing, adding absolute ethyl alcohol of which the gross weight is 2-3 times as heavy as the gross weight of the mixture; ball-milling by means of wetting phase, and evenly mixing; drying, smashing and pelleting the ball-milled sizing agent; calcinating for 2-5h under the temperature of 300-500 DEG C in an inert atmosphere furnace under the status of open setting; cooling to be room temperature; calcinating the power for 8-12h under the temperature of 500-800 DEG C in the inert atmosphere furnace under the compacting status that the surface pressure is 10kg/cm<3>; and secondarily sintering and synthesizing so as to obtain the lithium iron phosphate anode material. The synthesized material is classified and screened by means of fluid energy milling to obtain the nanometer-level lithium iron phosphate anode material, wherein the material is good in electrical conductivity, and the low-temperature performance of a manufactured battery can be effectively improved.

The invention discloses a preparation method of ultraviolet excitation single white phosphor, belonging to the technical field of luminescent materials. The structural formula of the phosphor is Sr1-XEuXZn2-YMnY(PO4)2, 0.005 is less than or equal to x is less than or equal to 0.1, 0.005 is less than or equal to y is less than or equal to 0.1. According to the molar ratio of Sr, Eu, Zn, and Mn in the structural formula Sr1-XEuXZn2-YMnY(PO4)2, the materials of SrCO3, ZnO, MnCO3, and Eu2O3 are weighted and dissolved in excess concentrated nitric acid. The solution is well mixed, and salicylic acid complexing agent is added in; after even stirring, urea, PEG and NH4H2PO4 are added to the solution, which is then stirred evenly. The solution is heated until all the water in the solution is evaporated to dryness, and then a gel is formed. Ammonia is added to the solution during the heating process of the solution. The acquired gel is combusted, and precursor powder is obtained. The obtained precursor powder is sintered, and the needed phosphor is produced. The invention has the advantages of easy access to the materials needed by the preparation, safe operation, and low energy consumption.