129results about How to "Diffusion distance is short" patented technology

A preparation method of a carbon coated vanadium sodium phosphate positive electrode material comprises the steps: with glucose as a reducing agent and a carbon source and water as a dispersant, carrying out ball milling of NH4VO3, NaH2PO4.2H2O and glucose in water, carrying out spray drying, calcining, and thus obtaining the carbon coated vanadium sodium phosphate positive electrode material. The method has the advantages of low synthesis temperature, simple steps, easily obtained raw materials, and advantageous industrialization; the obtained carbon coated vanadium sodium phosphate positive electrode material has a structure with uniform primary particles, has the particle size of 100-200 nm, and has the characteristics of short sodium ion diffusion distance, fast transmission speed, high specific surface area, high electrical conductivity and fast ion transmission and the like. The obtained carbon coated vanadium sodium phosphate positive electrode material is assembled into a battery; in a voltage scope of 2.0-3.75 V and under 1 C multiplying power, the highest first charge and discharge capacity per gram can reach 93.5 mAh*g<-1>, the capacity retention rate can be up to 97.7% after cycling for 50 circles with the 1C multiplying power, and excellent electrochemical performance is showed.

The invention discloses an SAPO molecular sieve, which has single crystals in sheet structure. The SAPO molecular sieve has moderate pore size, and can be used as a catalyst with long service life for olefin preparation from methanol. The invention also discloses a preparation method of the SAPO molecular sieve. The method us as below: activating a raw material of layered aluminosilicate, mixing the raw material with an phosphorus source and water, and homogenizing to obtain a wet masterbatch; drying and grinding the wet masterbatch to obtain a dry powder; and finally distilling the dry powder for crystallization, so as to obtain a raw powder for sheet SAPO molecular sieve. The method requires addition of a template agent, realizes low cost synthesis of SAPO molecular sieve and high additional value utilization of natural layered aluminosilicate, accelerates the rate of diffusion of various substances in the channels of the molecular sieve, increases the diffusion efficiency, and the advanategs of low equipment investment, simple operation and environment-friendliness.

The lithium rechargeable battery of the present invention is provided with a current collector and an active material layer containing active material particles 10 supported on this current collector. The active material particles 10 are secondary particles 14 in which a plurality of primary particles 12 of a lithium transition metal oxide are aggregated, and have a hollow structure that contains a hollow section 16 formed inside the secondary particle 14 and a shell section 15 that surrounds the hollow section 16. A through hole 18 that penetrates from the outside to the hollow section 16 is formed in the secondary particle 14. The ratio (A/B) in a powder x-ray diffraction pattern of the active material particles 10, where A is the full width at half maximum of the diffraction peak obtained for the (003) plane and B is the full width at half maximum of the diffraction peak obtained for the (104) plane, satisfies the equation (A/B)≦0.7.

The invention discloses a Co3O4/C lithium ion battery cathode material and a preparation method thereof. The cathode material is prepared by coating a thin carbon layer on the surface of a porous nano ball consisting of Co3O4, and distributing nano holes in the surface of the thin carbon layer. The preparation method comprises the following steps: dissolving cobalt nitrate and glucose in a mixture of ethanol and distilled water, uniformly stirring, adding a dispersing agent, and transferring the mixture into a sealed reaction kettle for reacting; cooling after the reaction is finished, performing centrifugal treatment on the reaction solution, washing the obtained precipitate, drying, annealing the precipitate under protection of inert atmosphere, and cooling the precipitate to obtain the cathode material. The Co3O4/C lithium ion battery cathode material is high in reversible capacity, stable in cycle performance, excellent in charging and discharging rate performance and has good application prospects; and moreover, according to the method, the cost is low, the preparation process is simple and continuous and large-scale production is easy.

The invention discloses a carbon-coated nano lithium titanate composite material and a preparation method thereof. The preparation method comprises the following steps: 1, preparing nano lithium titanate, namely, respectively preparing micro emulsions of a lithium source and a titanium source, mixing the two types of micro emulsion, standing, centrifuging, alternatively washing with an organic solvent and water, drying, and performing high-temperature calcinations; 2, performing carbon coating on nano lithium titanate, namely, preparing a solution from an organic carbon source, adding lithium titanate granules prepared in the step 1 into the solution, performing ultrasonic dispersion, performing hydrothermal reaction, cooling after the reaction, alternatively washing with the organic solvent and water, filtering, and drying, thereby obtaining the carbon-coated nano lithium titanate composite material. Refining of lithium titanate can be achieved through a micro emulsion method, the solution can be prepared from the carbon source, and carbon coating of the nano lithium titanate can be achieved through hydrothermal reaction, so that a conductive carbon network which is uniform and dense in combination can be formed on the surface of lithium titanate, the conductivity and the large-power charge/discharge property of an electrode material are remarkably improved, and the carbon-coated nano lithium titanate composite material can be used for preparing lithium ion electric containers and lithium ion batteries.

There are provided a photoacid generator, a method for manufacturing the same, and a resist composition comprising the same. The photoacid generator is a compound represented by the following formula 1, wherein Y represents any one selected from the group consisting of analkyl group substituted with an aryl group, and an aromatic hydrocarbon group; Q1 and Q2 each independently represent a halogenatom; X represents any one selected from the group consisting of an alkanediyl, an alkenediyl, NR', S, O, CO and combinations thereof; R' represents any one selected from the group consisting of a hydrogen atom and an alkylgroup; n represents an integer from 0 to 5; and A+ represents an organic counterion. The photoacid generator can produce, at the time of exposure, an acid which has a low diffusion rate, has a short diffusion distance, and exhibits an appropriate of degree of acidity so that the line width roughness (LWR) characteristics can be improved, and elution of which in a solvent such as pure water that is used in the process can be controlled.

The invention provides a powder metallurgy method for preparing superfine crystalline alloy by use of a micro-nano laminated sheet. The method comprises the steps of pre-preparing a micro-nano laminated matrix with preferred orientation and alloying element powder, mixing, and carrying out densification and sintering to form an ingot blank with a laminated structure, wherein the thickness of the alloying element powder is hundreds of nanometers, interlaminated interdiffusion is facilitated, alloying uniformity is realized, a texture formed by laminated superfine crystalline grains is obtained through further deformation processing, dislocation movement inside the crystalline grains is facilitated, and good plasticity is kept under a condition that the superfine crystalline strengthening and alloying strengthening mechanisms are brought into full play. The method saves time and energy, has low cost and wide application range, can be used for preparing bulked alloy material and has large-scale application potential, and the performances of the prepared alloy material are remarkably improved compared with the alloy material prepared by the conventional mechanical alloying method.

The invention discloses a method for preparing a hierarchical pore carbonic oxide microsphere material. The method comprises the following steps: A, impregnating PU foam with a PAA solution, and drying for 6-20 hours at 50-90 DEG C in vacuum; B, heating the PU foam after impregnating and drying in an inert gas atmosphere, namely heating for 0.5-3 hours at 80-120 DEG C, increasing the temperature to 170-230 DEG C and heating for 0.5-3 hours, and increasing the temperature to 270-330 DEG C and heating for 0.5-3 hours; and C, roasting for 1-6 hours at 500-800 DEG C in the inert gas atmosphere after the heating treatment in the step B is completed, and cooling to room temperature. The method is simple, has low cost and short reaction time, and is suitable for industrial production; and the prepared carbonic oxide microsphere material has an ideal flower-like spherical shape, a micropore-mesopore-macropore hierarchical porous structure, a large specific surface area, high nitrogen content and excellent electrochemical performance, and has huge application prospects in the field of super-capacitors.

The invention discloses a preparation method for a composite photocatalytic material based on a microbial template, and belongs to the field of photocatalysis. The method comprises the following steps: firstly screening polypeptide with specific adsorption and nucleation ability by utilizing a phage display technology, expressing the polypeptide on a capsid protein of a specific microorganism through a genetic modification technology, finally putting the modified microorganism into a sol of a photocatalytic material by using the modified microorganism as a template, and putting the obtained microorganism into a sol of a co-catalysis supported material by using the obtained microorganism as a template to prepare the composite photocatalytic material. The preparation method for the compositephotocatalytic material based on the microbial template disclosed by the invention can realize preparation of mass nano composite photocatalytic materials, the preparation process is nano-scale controllable, and the photocatalytic efficiency can be effectively improved.

The invention relates to a preparation method of doped spherical nanoscale Ni(OH)2, which solves the problem that the existing doped spherical nanoscale Ni(OH)2 has irregular shape. The preparation method comprises the following steps: adding alkane or cycloalkane in the mixed solution of n-hexanol and surfactant; stirring uniformly; adding a solution doped with metal ions and Ni<2+>, and stirring uniformly; adding an alkaline solution dropwise to adjust pH value to 8 to 11; separating precipitate; washing; calcining; and milling to obtain the final product. The nanoscale Ni(OH)2 prepared by the method has a spherical or nearly spherical shape, and a beta-type crystal form. The maximum 1C discharge specific capacity of a Cd-Ni (cadmium-nickel) battery prepared from Co-doped spherical nanoscale Ni(OH)2 reaches 245 mAh/g, which is improved by 16% in comparison with that of Cd-Ni battery prepared from doped nonspherical nanoscale Ni(OH)2, and the cycle specific capacity is also improved remarkably. The discharge specific capacities of Zn-doped spherical nanoscale Ni(OH)2 and Al-doped spherical nanoscale Ni(OH)2 are also improved.

The invention discloses a preparation method of a photosensitive antibacterial material, and the photosensitive antibacterial material is prepared by enriching a photosensitizer with carboxyl on the surfaces of zinc oxide nanoparticles through a strong adsorption effect by adopting a precipitation method. The photosensitive antibacterial material can generate a large amount of active oxygen through light irradiation, so that the photosensitive antibacterial material has very strong antibacterial performance, is simple in preparation process, relatively mild in reaction condition and suitable for industrial production, and can be used for preparing medical antibacterial materials or building coating materials.

The invention belongs to the technical field of organic synthesis, and particularly relates to a phenol and hydrogen peroxide hydroxylation microchannel reaction method. The method comprises the steps of mixing the raw materials phenol, water, hydrogen peroxide and a water-soluble catalyst according to certain proportions to prepare a raw material solution, adding the raw material solution into a mixing tank, setting the reaction temperature of a microchannel reactor to be 30-150 DEG C, and inputting the raw material solution into the microchannel reactor at the flow rate of 5-150 mL/min through continuous charging and discharging for hydroxylation reaction, so that catechol and hydroquinone are obtained. The method is simple, operation is convenient, the conversion rate is high, selectivity is high, efficiency is high, and the content of tar in reaction liquid is low.

In an example, the present invention provides a method for forming a film of material for a solid state battery or other energy storage device. The method includes providing a first precursor species, and providing a second precursor species. The method also includes transferring the first precursor species through a first nozzle and outputting the first precursor species in a first molecular form and transferring the second precursor species through a second nozzle and outputting the second precursor species in a second molecular form. The method includes causing formation of first plurality of particles, ranging from about first diameter to about a second diameter, by intermixing the first precursor species with the second precursor species. The method also includes cooling the first plurality of particles at a rate of greater than 100° C./s to a specified temperature.

The invention belongs to the technical field of solar cells, and relates to a two-dimensional silicon-based micro-nano photonic crystal solar cell. The two-dimensional silicon-based micro-nano photonic crystal solar cell is characterized in that front electrodes which are periodically arrayed are arranged on the lower side surface of a front contact layer; a two-dimensional silicon-based micro-nano photonic crystal solar cell structure is arranged between the front electrodes and back electrodes, upper layers of the two-dimensional silicon-based micro-nano photonic crystal solar cell structure are type-n silicon semiconductor layers, a lower layer of the two-dimensional silicon-based micro-nano photonic crystal solar cell structure is a type-p silicon semiconductor layer, and PN junctions are formed by the type-n silicon semiconductor layers and the type-p silicon semiconductor layer; a back contact layer is arranged at the bottoms of the back electrodes, and the back contact layer and the front contact layer are made of identical materials; the back electrodes which are of aluminum thin layer structures are arranged in slow-light regions or band-gap regions of the type-p silicon semiconductor layer. The two-dimensional silicon-based micro-nano photonic crystal solar cell has the advantages that the two-dimensional silicon-based micro-nano photonic crystal solar cell is simple in structure, small in size, low in threshold, short in carrier diffusion distance and high in stability, light coupling efficiency and light transmission efficiency, is far thinner than the traditional silicon solar cell and becomes a new-generation low-cost and efficient solar cell device with the maximum potential, and mature processing and composite technologies are implemented.

A method for preparing an aluminum-doped zinc oxide nanowire belongs to the field of photoelectric information functional materials. In the method, zinc powder and aluminum powder are taken as an evaporator source, and adjacently put in an aluminum oxide boat; the washed silicon wafer is put at a position 1-2mm vertical distance from and over the evaporator source, and then the boat is put in a horizontal tubular furnace which is heated to 800-850 DEG C and heat is preserved for 45-60min; in the whole growth process, argon is consecutively introduced into the furnace chamber at the flow rate of 40-50ml/min, when the growth is completed, the tubular furnace naturally cools to room temperature, and then the silicon wafer is taken out with the surface sedimented with the aluminum-doped zinc oxide nanowire. The method can synthesize the aluminum-doped zinc oxide nano-wire with the diameter of 40-370nm and the length of 30-150mum under the normal pressure without any vacuum equipment; in addition, the synthesis temperature is low, which greatly lowers the production cost.

The invention provides an integrated structure of an optical fiber provided with a label-free optical sensing element on one end face and a microfluid. The structure at least comprises a microfluid structure and at least an optical fiber which is provided with a label-free optical sensing element arranged on one end of the optical fiber. The end, which is provided with the label-free optical sensing element, is inserted into the frame of the microfluid. The structure integrates an optical fiber provided with a label-free optical sensing element and a microfluid, thus has the advantages of simple structure, agility, convenience, good stability, little using amount of biological sample of microfluid chip, short diffusion distance of biomolecule, multichannel parallel detection, and integrated microfluid functions, and is suitable for industrial production.

The invention relates to a method for preparing maleic anhydride through n-butane. The method comprises the following steps: contacting and chemically reacting n-butane and air which serve as the raw materials and a vanadium phosphorus oxide/foamed SiC structural catalyst which is used as an active component through a reactor to obtain a maleic anhydride product, wherein the vanadium phosphorus oxide/foamed SiC structural catalyst is a structural catalyst prepared by loading a vanadium phosphorus oxide coating and/ or a vanadium phosphorus oxide crystal on a SiC carrier; the chemical reaction is performed at the temperature of 350 to 550 DEG C, and the temperature is preferably 400 to 500 DEG C; the reaction pressure is 0 to 3.0MPa and preferably 0 to 1.0MPa; the foamed SiC is high in heat transfer capacity, and therefore, the phenomena of sudden inactivation and temperature runaway of the catalyst due to local overheat of the catalyst can be effectively avoided.

The invention provides a method for quickly preparing peracetic acid by continuous flow, which utilizes a continuous flow micro-channel reactor for reaction, and comprises the following steps: 1) mixing acetic acid, a hydrogen peroxide solution, a catalyst and a stabilizer, and introducing the mixture into a micro-channel reaction preheating module; (2) enabling the mixture preheated in the step (1) to continuously enter a micro-channel reaction module, wherein the reaction temperature range is 80-150 DEG C, the pressure is maintained at 0.5-2.0 MPa, and the retention time is 10-200 seconds; and 3) enabling a product obtained at the outlet of the micro-channel reaction module in the step 2) to enter a cooling module. By utilizing the characteristics of the micro-channel reactor, the peroxyacetic acid can be quickly prepared by continuous flow, and compared with the traditional process, the method has the advantages that the reaction time is greatly shortened, the production efficiencyis improved, the safety risk is effectively reduced, and industrial amplification and production are easy to perform.