47results about How to "Suitable for commercial applications" patented technology

The invention discloses a sodium ion battery negative electrode material and a preparation method thereof, and the preparation method comprises a preparation method (1) or a preparation method (2). The preparation method (1) is: firstly activating the soft carbon and then coating the hard carbon; the preparation method (2) is: firstly activating the hard carbon and then coating the soft carbon. The preparation method firstly introduces a large number of developed pore structures by activating the soft carbon/hard carbon to provide more storage space for sodium ions, which is favorable for theincrease of material capacity; then the coating of a hard carbon/soft carbon precursor can effectively cover the defects and edge faces caused by the activation, reduce the irreversible capacity losscaused by the insertion and removal of sodium ions, and effectively improve the first-week coulomb efficiency. The sodium ion battery negative electrode material of the invention has the advantages oflow cost, high capacity and high first-week coulomb efficiency, and high cost performance; in addition, the preparation method of the invention is simple and suitable for commercial application.

The invention relates to specifically relates to a preparation method for calcium carbonate whiskers extracted from limestone, belonging to the field of inorganic micropowder. According to the preparation method, natural limestone is subjected to fragmentation and crushing and then mixed with a proper amount of water and a surface modifier, and the calcium carbonate whiskers with structured morphology can be directly obtained through the processes of generation, dissolving, decomposition and crystallization of calcium bicarbonate. The preparation method comprises the following key technical steps: (1) introducing high-pressure CO2 gas into limestone dust suspension with the proper amount of the surface modifier so as to convert calcium carbonate into water-soluble calcium bicarbonate; and (2) controlling decomposition of water-soluble calcium bicarbonate under proper reaction conditions so as to allow the calcium carbonate whiskers mainly of aragonite structures to be precipitated. The preparation method has low requirement on raw materials and completes both purification and crystallization in the process of preparation; and the calcium carbonate whiskers have hydrophobic surfaces, show good dispersibility in matrixes like organic solvents and high-molecular resin and are applicable to the industrialization fields of paint, plastics, polymer composites, etc.

The invention provides a periodic metal contact gain-coupled distributed feedback semiconductor laser device, belongs to the technical field of semiconductor laser chips, and aims at solving the problems that the distributed feedback semiconductor laser device in the prior art is difficult to prepare and high in cost. Periodic metal contacts are manufactured on a semiconductor laser chip; lateral current restricted areas can be manufactured between the periodic metal contacts through means of etching, oxidization, current carrier injection and the like; and high-reflective films or antireflective films can also be manufactured on the end surfaces of the chip. According to the periodic metal contact gain-coupled distributed feedback semiconductor laser device, semiconductor laser single-tube or linear array output with high power and narrow linewidth can be achieved; and the periodic metal contact gain-coupled distributed feedback semiconductor laser can also be applied to other semiconductor laser devices as a seed source, or can be applied to generation of a dual-wavelength or frequency comb-excited semiconductor laser light, or is used for carrying out nonlinear optical effect, and can also be used for obtaining a semiconductor laser pump light source with a stable wavelength.

The invention relates to diamond-shaped dodecahedron hollow potassium tannate nanoparticles and a preparation method thereof which are characterized in that obtained potassium tannate nanoparticles have diamond-shaped dodecahedron hollow appearance structures and are directly prepared in an aqueous solution based on an acid-base neutralization principle and a dissolution mechanism in a ZIF-8 acid environment under the condition of a room temperature. The preparation method comprises the following preparation steps: (1) firstly preparing a ZIF-8 nanoparticle colloidal solution in an ethylene glycol solution by taking zinc nitrate and 2-methylimidazole as raw materials, centrifugally separating, performing ultrasonic cleaning with alcohol and then dispersing in the aqueous solution; (2) adding potassium hydroxide and a tannic acid aqueous solution into the ZIF-8 aqueous solution under the condition of rapid stirring, uniformly mixing and reacting for 10-60 minutes under stirring at a room temperature; (3) centrifugally separating the prepared colloidal solution obtained in the step (2) at a high speed and performing ultrasonic cleaning to obtain the diamond-shaped dodecahedron hollow potassium tannate nanoparticles. The hollow potassium tannate nanoparticles obtained by the preparation method provided by the invention have important application values in drug transport, UV protection, bacterium resistance, pollutant adsorption and the like.

The invention discloses an oxygen reduction catalyst. The oxygen reduction catalyst comprises a carbon material and two or more doping elements doped in the carbon material, wherein the doping elements are non-metallic elements excluding carbon and oxygen elements in the group IIIA and the group VA to the group VIIA. The invention further discloses a preparation method and an application of the above oxygen reduction catalyst. The oxygen reduction catalyst disclosed by the invention has a large specific surface area, good electrical conductivity, high stability, excellent oxygen reduction activity and simple preparation method, and thus is suitable for commercial application.

The invention provides a bimetallic selenide carbon microsphere composite material as well as a preparation method and application thereof. In the bimetallic selenide carbon microsphere composite material, two kinds of metal selenide are cross-linked with each other through the carbon matrix and are uniformly combined to form microspheres; in the two kinds of metal selenide, the metal valence state of one is relatively high, and the metal valence state of the other is relatively low. By introducing the high-valence metal, the electron and ion transmission effect of the low-valence metal can be improved, and the synergistic effect of the double metals is generated, so that the activity and the sodium storage performance of the material are improved. The carbon matrix not only provides a conductive network, but also limits the volume expansion of the material.

The invention discloses a composite anode material of a lithium ion battery. According to the composite anode material, nano silicon co-coated with a conductive carbon network and a silicon-manganesealloy is served as an active substance, a manganese source is dispersed in a medium and is uniformly dispersed on the surface of silicon oxide by stirring, the surfaces of the particles are coated with a reticulate conductive polymer in situ, and an obtained precursor is subjected to high-temperature heat treatment so as to prepare a self-supporting material co-coated with the conductive carbon network and the silicon-manganese alloy. The invention further provides a preparation method for the nano-silicon self-supporting anode material co-coated with the carbon network and the silicon-manganese alloy. The preparation method has the advantage that the cycling stability and the rate capability of the anode material can be effectively improved.

The invention relates to a polyurethane microporous elastomer, polyether polyol is adopted as a reaction raw material and is matched with other components, so that the obtained polyurethane microporous elastomer has excellent tensile strength, tearing strength, elongation at break, wear resistance and folding resistance under the condition of relatively low density. The invention also provides a preparation method of the elastomer.

The invention relates to an annual-ring-shaped graphene organic silicon resin biomimetic composite material, and a preparation method and application thereof. The annual-ring-shaped graphene organic silicon resin biomimetic composite material comprises, by mass, 55-73% of an organic silicon resin matrix, 20-40% of an annual-ring-shaped graphene biomimetic skeleton array and 5-7% of a curing agent.The annual-ring-shaped graphene bionic skeleton array is prepared by using a 3D printing technology, and the skeleton is of a concentric-circle hierarchical structure and can effectively form a vertical through conduction network, so that the composite material shows excellent heat conduction and electric conduction performance under the condition of relatively low graphene content. The highest thermal conductivity of the composite material is greater than 20 W/mK, and the highest electric conductivity is greater than 100 S/m. The bionic composite material disclosed by the invention is non-toxic, environment-friendly, low in cost, convenient to prepare and easy for expanded production, is a thermal interface material with excellent performance, and can be applied to the fields of 5G communication equipment, electronic packaging, aerospace, energy and chemical industry and the like.

The invention discloses an epitaxial growth method for improving the crystal quality of an aluminum nitride material, and the aluminum nitride material. The epitaxial growth method for improving the crystal quality of the aluminum nitride material comprises the following steps: growing and forming an aluminum nitride bottom layer on a substrate, growing an aluminum nitride hole forming layer on the aluminum nitride bottom layer, and simultaneously forming a plurality of holes in the aluminum nitride hole forming layer; and growing an aluminum nitride merging layer on the aluminum nitride hole forming layer, merging materials for forming the aluminum nitride merging layer at the top of each hole to form a cavity in situ, and wrapping the cavity in the aluminum nitride merging layer to make the epitaxial layer formed on the cavity have a flat and crack-free surface. The epitaxial growth method for improving the quality of the AlN material has the advantages of remarkable dislocation density reduction effect, capability of simultaneously inhibiting cracks, simple process, wide adaptability and the like, so that the thicker crack-free and high-quality AlN material grows, and the epitaxial growth method is completely suitable for commercial production.

The invention relates to block thermoelectric material. The chemical formula of the thermoelectric material is (Cu2-xHAx) (Sel-y (L/2)My), wherein x<=0.15, 0<=y<=0.1, H is the valence of the element A, L is the valence of the element M, the element A is any one of Al, Mn, Co, Ni, Ga, Mo, W, Zr and Nb, and the element M is any one of N and Si. The performance factor ZT of the thermoelectric material is 2-3 at the temperature of 580-680 DEG C. By certain fabrication processing of the thermoelectric material, the block material can be obtained, wherein the performance factor ZT of the block material is 2-3 at the temperature of 580-680 DEG C, and the block material is suitable for business application. As everyone knows, improvement of the performance factor ZT of the thermoelectric material by 0.4 is great performance, moreover the performance factor ZT is improved by 1.4 to the greatest extent, and the working temperature range is as wide as 100 DEG C. The thermoelectric properties of the thermoelectric material already reaches the requirements of the business application, the performance factor ZT is 2-3 at the temperature of 580-680 DEG C, and the range of electricity generating temperature is wide.

The invention relates to a molecular marker kit for formulating an individual weight reduction scheme. The kit comprises nucleotide shown in SEQ ID NO:1-10 and can comprise restriction endonucleases Hha I, Msp I and Bbv I. The kit is used for analyzing SNPs (single nucleotide polymorphisms) genotypes of a subject and issuing a comprehensive genetic predisposition analysis report, and nutritionists are invited to recommend a diet style (low fat diet, low carbohydrate diet and balanced diet) suitable to weight reduction to the subject, analyze intake calorie of the subject required every day according to the practical situation of the subject and individually arrange the proportion of three nutrient elements (fat, protein and carbohydrate) in three meals a day, so that healthy, scientific and effective weight reduction is achieved.

The invention relates to an electron irradiation preparation method of aluminum oxide quantum dots on the surface of a thin film. The method comprises cleaning of the substrate; preparation of the aluminum oxide amorphous film; electron irradiation of the prepared amorphous film by a commercial electron electrostatic accelerator; and annealing treatment of the irradiated amorphous film. Through the above steps, alumina quantum dots are prepared on the surface of the alumina amorphous film, and the quantum dot distribution density and geometric structure characteristic parameters can be regulated by controlling electron irradiation and annealing treatment parameters. Compared with the prior art, the present invention grows alumina quantum dots in situ on the surface of the alumina film without introducing impurities, and the process is simple; the obtained alumina film is amorphous, so the circularity of the alumina quantum dots prepared by the present invention is Better, uniform in size, and uniform in shape distribution. Moreover, commercial electron electrostatic accelerators are used for electron irradiation, which can realize large-scale large-scale preparation and commercial application.

The invention relates to a microbial fermentation technology, in particular to a preparation method of a biologically-fermented washing liquid derived from agallochum leaves. The method comprises thefollowing steps: (1) screening of strains with high yield of cellulase and protease; (2) mixed fermentation; (3) rough filtration: filtering and centrifuging fermentation liquor to obtain clarified yellow thick liquid; (4) fine filtration: adding 4-5% of powdered activated carbon into a coarse filtrate, carrying out heating to 50 DEG C, performing sufficient stirring for 2 h, and carrying out filtering to obtain clear liquid; (5) preparation of a detergent. According to the invention, agricultural wastes are fully utilized, and the utilization rate of energy is improved; the resources of agallochum leaves and bagasse are utilized, the waste is turned into the valuable, and the very good detergent is produced, so resource utilization and environmental pollution prevention are both realized;and in addition, the biologically-fermented washing liquid has the advantages of usage of cheap raw materials, environment-friendly process, less emission and the like, and is very suitable for commercial application.

The invention discloses a preparation method of a CrN-Cr-CrN composite protective coating on the surface of a Zr-4 cladding, and belongs to the technical field of functional material preparation. The technical problem that the binding force between an existing Zr-4 cladding coating and a substrate and the high-temperature oxidation resistance cannot reach an ideal state is solved. According to the invention, the CrN-Cr-CrN composite protective coating is sequentially prepared on the Zr-4 substrate by utilizing a gradient reaction magnetron sputtering technology, so that higher binding force between the coating and the substrate is achieved, and meanwhile, better high-temperature oxidation resistance is ensured, and the application requirement of the coating cladding is met.

The invention provides a method for manufacturing a composite Raman-enhanced substrate. An Ag non-continuous nano-film with the thickness ranging from 20 nm to 50 nm is prepared on a smooth substrate through magnetron sputtering; a potassium chloroplatinate (K2PtCl4) solution and a sodium citrate (C6H5Na3O7) solution are prepared; a nano-Ag film substrate is put into the solutions to react for 10 min to 30 min at the temperature of 90 DEG C, and the substrate is taken out to be cleaned; hydrogen peroxide is prepared, the substrate is put into the hydrogen peroxide to be subjected to a stirring reaction for 5 min to 10 min, and then the substrate is taken out and cleaned; and a sodium borohydride (NaBH4) solution is prepared, the substrate is put into the sodium borohydride (NaBH4) solution to be subjected to a stirring reaction for 5 min to 10 min, and then the substrate is taken out and cleaned. By the adoption of the method, the good Raman-enhanced effect is achieved; and the manufacturing process is simple, performance is excellent, and stability is good.