39results about How to "Shorten the pathway of diffusion" patented technology

The invention provides an electrode material in a hollow tubular structure, and the electrode material is in the hollow tubular structure which consists of a composite hydroxide/copper hydroxide/copper-contained metal substrate. The chemical formulation of the composite hydroxide is MxM'y(OH)2, wherein M is Ni2+ or Co2+, M' is Co2+, Al3+, or Fe3+. According to the invention, a method of solution dipping and constant potential deposition, and a copper hydroxide nanowire array grows on the copper-contained metal substrate in an in-situ manner. The composite hydroxide is deposited on a copper hydroxide nanorod in electrolyte containing mixed metal salt solution in a manner of electro-deposition through employing the method of constant potential deposition. Meanwhile, electrochemical corrosion enables the copper hydroxide nanorod to be dissolved in a process of electro-deposition, thereby obtaining the hollow tubular structure of the composite hydroxide/copper hydroxide/copper-contained metal substrate. The electrode material is good in super-capacitance performance, and can be used for a super-capacitor.

The invention relates to a preparation method of a hierarchical pore carbon foam used for a supercapacitor electrode. The method comprises: firstly taking formaldehyde, resorcinol, silicon dioxide nanoparticles and water according to a mass ratio of 1:1-2:0.1-1:0.5-10, mixing them uniformly and taking the mixture as a water phase; adopting liquid paraffin as an oil phase, using Span 80 and Tween 80 as emulsifiers, weighing Span 80, Tween 80, the oil phase and the water phase according to a mass ratio of 2:3:8-20:15-30, mixing the water phase, the oil phase and the emulsifiers under stirring to obtain an oil-in-water type emulsion, adding a catalyst to solidify make the emulsion, conducting drying, then performing high temperature carbonization, removing the silicon dioxide nanoparticles from the carbonized material by dissolution in an HF solution with a mass percent of 40%, thus obtaining carbon foam, mixing the carbon foam with KOH in a mass ratio of 3-7:1, then conducting activation at 800-1000DEG C, thus obtaining the hierarchical pore carbon foam. When the hierarchical pore carbon foam provided in the invention is used as a supercapacitor electrode, high specific capacitance can be effectively maintained, and simultaneously the large current charge-discharge performance of the electrode can be improved.

The invention relates to a method for preparing a porous carbon/binary transition metal oxide nanosphere material. The method includes the steps of mixing glycerol and isopropyl alcohol according to a volume ratio of glycerol: isopropyl alcohol = 1: 3 to 5, adding Ni(NO3)2<separateion dot>6H2O and Co(NO3)2<separateion dot>6H2O according to a mass ratio of Ni(NO3)2<separateion dot>6H2O: Co(NO3)2<separateion dot>6H2O: glycerol = 1: 2: 250, stirring into a pink transparent solution, adding F127 according to a mass ratio of F127: Ni(NO3)2<separateion dot>6H2O = 1 to 20: 9, stirring until the white powder is completely dissolved in the transparent solution, conducting hydrothermal treatment at 180 DEC C for 6h, and obtaining NiCo glyceride nanospheres; after washing and drying, heating the NiCo glyceride nanospheres in a tube furnace injected with air from the room temperature to 350 DEG C at a heating rate of 0.5 to 5 DEG C/min, maintaining the constant temperature for 2-4h, and obtaining binary transition metal oxide NiCo2O4 nanospheres; and dispersing in a 0.05 M glucose solution, conducting hydrothermal treatment at 170 DEC C for 4h, after washing and drying, conducting carbonization in a nitrogen atmosphere for 4 to 6 hours, and obtaining porous carbon/binary transition metal oxide nanospheres via natural cooling. The method of the invention has the advantage of simple process, and the obtained porous carbon/binary metal oxide nanospheres exhibit a high specific capacity value and a long stable cycle life as a supercapacitor electrode material.

The present invention relates to a porous lithium titanium oxide anode material, a method of manufacturing the same, and a battery comprising the same. The method of manufacturing a porous lithium titanium oxide anode material of the present invention includes the following steps: (A) mixing a lithium salt and an organic acid, and adding a titanium salt immediately; (B) performing a first heat treatment at 300-800° C. for three hours; and (C) performing a second heat treatment at 600-800° C. for ten hours to obtain a porous lithium titanium oxide anode material. The cost of manufacturing the porous lithium titanium oxide anode material can be reduced through the aforementioned method, and a lithium battery having excellent electrochemical properties and cycling stabilities can be produced by the present invention.

The invention discloses a PP/POE supercritical foaming composite material and a preparation method thereof. The material is prepared from the following raw materials in parts by weight: 140 to 165 parts of polypropylene, 35 to 42 parts of polyolefin elastomer, 10 to 14 parts of maleic anhydride grafted polypropylene, 10 to 14 parts of a maleic anhydride grafted polypropylene modifier, 2 to 3 partsof a nucleating agent, 8 to 12 parts of mesoporous silica, 1.5 to 2 parts of a dispersing agent and 0.8 to 1.2 parts of a cross-linking agent. According to the PP/POE supercritical foaming compositematerial disclosed by the invention, the raw material composition is carefully selected, and the content of each raw material is optimized, so that the respective advantages are brought into full play, mutual complementation and mutual promotion are realized, the product quality is improved, and the prepared PP/POE supercritical foaming composite material is high in tensile strength and good in mechanical property; the compression set rate is low, and good elasticity is achieved; the foaming ratio is high, foam holes are uniform, the size is moderate and compact, the foam hole structure is complete, the sealing performance is good, and the foaming effect is good.

The invention provides a preparation method of a spherical lithium ion battery anode composite material. The preparation method comprises the following steps that 1, 0.1-2 mmol of a saccharide compound is weighed and added into 20-80 mL of a water and ethylene glycol mixed solution to be dissolved by heating, and a solution A is obtained; 2, 0.1-10 mmol of a vanadium source is weighed and added into the solution A to be dissolved by heating, and a solution B is obtained; 3, the solution B is subjected to a solvothermal reaction for 1-28 h on the condition that the temperature is 160 DEG C to 220 DEG C, and a precursor is obtained; and 4, the obtained precursor is washed, centrifuged, dried and subjected to thermal treatment in an inert atmosphere, and the V2O3-C material is obtained. According to the preparation method, the specific surface area of the whole material can be increased to enable the contact area between an electrolyte solution and V2O3 to be increased, the diffusion pathof ions can be shortened, and the electrochemical performances of the V2O3-C material are improved; and the stability of the material in the long-term charging and discharging process is kept.

The invention discloses a TPU/EVA supercritical foam composite material and a preparation method thereof. The TPU/EVA supercritical foam composite material is prepared from, by weight, 300-360 parts of a thermoplastic polyurethane elastomer, 66-73 parts of an ethylene-vinyl acetate copolymer, 25-33 parts of a maleic anhydride grafting modifier, 9-14 parts of peroxide and 1.2-1.6 parts of a nucleating agent. The TPU/EVA supercritical foam composite material has the advantages of good foaming effect, high foaming efficiency, uniform, small and dense cells, excellent mechanical properties and useproperties such as light weight and high strength, high tensile strength, large elongation at break, good mechanical properties, high tear strength, good tear resistance and low density.

The present invention provides a composite cathode sheet for a lithium-sulfur battery and a preparation method thereof, and application thereof. The composite cathode sheet comprises a nano microporous carbon-sulfur composite material, conductive agent and polyvinylidene fluoride. The aperture of the nanoporous carbon in the composite material is smaller than 0.8nm. The common existence form S8 ofsublimed sulfur is converted to short-chain sulfur molecules S2-4 to prevent the lithium-sulfur battery from generating diffluent high-order polysulfide in the discharge process, avoid generation ofa shuttle effect and improve the cycle stability of the lithium-sulfur battery.

The invention discloses a nano solid-core iron phosphate-carbon source-graphene composite material; the surfaces of nano solid-core iron phosphate particles are coated with a carbon source, the particles are connected through graphene, and the nano solid-core iron phosphate-carbon source-graphene composite material is formed. The invention also discloses a preparation method of the material. The process flow is simple, the cost is low, at the same time, nitrate radicals are adopted, and the disadvantages in a traditional process that sulfate radicals in an FeSO4 raw material are difficult to wash cleanly and chloride ions in an FeCl3 raw material have a corrosion effect on equipment are overcome. The prepared lithium iron phosphate positive electrode material has the tap density reaching up to 1.68 g/cm<3>, has large volume specific capacity, is beneficial for preparation of a positive electrode material slurry and coating of an electrode slice, and improves the quality of the electrode slice.

The invention discloses a PA/TPU supercritical foamed composite material and a preparation method thereof. The PA/TPU supercritical foamed composite material is prepared from the following raw materials in parts by weight: 200-240 parts of polyamide, 160-180 parts of organic silicon modified polyurethane, 70-77 parts of a maleic anhydride grafted modifier, 45-52 parts of maleic anhydride grafted high-density polyethylene, 22-26 parts of glass fiber, 15-18 parts of a cross-linking agent and 5-7 parts of a nucleating agent. The PA/TPU supercritical foamed composite material is good in foaming effect and moderate and uniform in pore size, and good appearance performance, mechanical performance and the like are guaranteed; the tensile strength is high, the tearing strength is high, and the tearing resistance is good; the material has the advantages of low density, light weight, high strength and the like, and has excellent mechanical properties and usability.

The invention discloses a nylon/polyurethane supercritical foamed composite material and a preparation method thereof. The nylon/polyurethane supercritical foamed composite material is prepared from the following raw materials in parts by weight: 300-350 parts of polyamide, 60-72 parts of polyurethane, 40-48 parts of a polyamide-polysiloxane segmented copolymer, 6-8 parts of graphene fiber, 5-7 parts of a cross-linking agent and 3-4 parts of a nucleating agent. The nylon/polyurethane supercritical foamed composite material disclosed by the invention is good in foaming effect and high in foaming efficiency; the foam holes are uniform, small and compact; the advantages of high resilience rate, low water absorption rate, good dimensional stability, small irreversible deformation after being pressed, high tensile strength, good mechanical properties, light weight, high strength and the like excellent mechanical properties and use properties are achieved.

The invention discloses a method for preparing a Fe-doped Mn3O4 carbon-nitrogen material with a hollow nano-frame structure and the application of the material in an oxygen reduction reaction and a zinc-air battery. The method comprises the steps of (1) separately preparing a Fe(CN)6<3->/PVP solution and a Mn<2+> solution, (2) uniformly mixing the Fe(CN)6<3->/PVP solution and the Mn<2+> solution and standing to obtain KMnFe(CN)6 khaki Prussian blue similar precipitation, and (3) performing alkali washing on KMnFe(CN)6 solid powder in a NaOH solution and raising the temperature to perform thermal processing at 250 DEG C to 350 DEG C in an inert atmosphere to obtain the Fe-doped Mn3O4 carbon-nitrogen material with the hollow nano-frame structure. The preparation method of the invention has the advantages of low cost and simple and universal use, the obtained material has the open hollow nano-frame structure, the material can be used as an electrocatalytic material of oxygen reduction reaction, and the material has high activity and excellent stability energy and can be applied as a positive electrode material of the zinc-air battery.

The invention discloses application of a chestnut-shaped graded manganese selenide/carbon composite material as a lithium ion battery anode material. The diameter of the chestnut-shaped graded manganese selenide/carbon composite material is about 1-5 [mu]m. The chestnut-shaped graded manganese selenide/carbon composite material has the multiple characteristics of the high conductivity, the high specific surface area, the high volume change inhibition effect, the relatively higher working voltage platform and the pseudo-capacitance enhancement, so that the safety of the lithium ion battery is improved, the cycling stability and the rate capability of the lithium ion battery are improved, and the assembled lithium ion battery has the better electrochemical performance.

The invention relates to the technical field of African swine fever virus detection and discloses an rapid detection card for African swine fever virus, which comprises a cover plate, a sample pad, acellulose nitrate film, a water absorption pad, a sample adding hole, an expanding plate, a clamping column, a PVC supporting plate, a handle, a pressing block and a clamping plate, wherein the PVC supporting plate is fixedly connected to the back surface of the cover plate; the sample pad contacted with the cover plate is adhered to the front surface of the PVC supporting plate; the cellulose nitrate film contacted with the cover plate is adhered to the front surface of the PVC supporting plate; the sample adding hole is form in the front surface of the cover plate, the sample adding hole ismovably connected with the water absorption pad; the top of the cover plate is fixedly connected with the expanding plate, the expanding plate is fixedly connected with the clamping column, the innerpart of the handle is connected with the pressing block, the pressing block is connected with the clamping plate, the clamping plate is in contact with the expanding plate, the rapid detection card for the African swine fever virus achieves the purpose of safer use and reduces the transmission and diffusion paths of the African swine fever.