71results about How to "Increase effective contact" patented technology

The invention discloses a preparation method and applications of a battery graphene-base current collector, and belongs to the field of electrochemical battery. The provided current collector is suitable for lithium ion battery and lithium-sulfur battery, is prepared by dispersing graphite, subjecting graphite to suction filtration, and rolling the graphite, has a thickness of 15 to 25 [mu]m, and has high mechanical strength. When the provided graphene-base current collector is applied to a lithium ion battery or a lithium-sulfur battery, the weight of the lithium ion battery or the lithium-sulfur battery is effectively reduced, the energy density of the lithium ion battery or the lithium-sulfur battery is improved. Moreover, the provided current collector has a very strong electrolyte absorbing and storing performance, so the strong current charging / discharging performance of battery using the provided current collector is improved, and the properties of multiple electrode materials are all largely improved. The preparation process of the provided current collector is simple and controllable, and furthermore the preparation method can be applied to massive and low-cost industrial production, and thus has a high application value.

The invention discloses a method for desizing cotton yarn-dyed fabrics and belongs to the cotton yarn-dyed fabric pretreatment technology field of printing and dyeing industries. The cotton yarn-dyed fabrics are subjected to compound bio-enzyme desizing treatment after being pretreated by hot water, are subjected to enzyme deactivation treatment after stacking to remove active enzyme remaining in the fabrics, and then are washed and dried. The method aims at solving the technical problem that starch sized cotton yarn-dyed fabrics alpha-amylase padding-steaming stacking method is poor in desizing effect and starch size still remains on desized yarn-dyed fabrics, so that after-treatment quality of the yarn-dyed fabrics is influenced, thus the purpose of improving the desizing effect of the yarn-dyed fabrics is achieved.

The invention relates to a high-precision five-shaft multi-dimensional ultrasonic polishing device, and belongs to the field of polishing of a complicated curved surface element which has high precision and is difficult to machine. An upright guide rail is arranged at the upper part of an L-shaped base; an upright rotary table capable of moving up and down is arranged on the upright guide rail; a polishing tool head vibrator assembly is arranged on the upright rotary table; a horizontal guide rail I is arranged at the lower part of the L-shaped base; a horizontal guide rail II capable of moving forwards and backwards is arranged on the horizontal guide rail I; a horihzontal rotary tool table capable of moving leftwards and rightwards is arranged on the horizontal guide rail II; the vibration radiation surfaces of ultrasonic vibration exciting assemblies I and II in the horizontal rotary tool table are respectively in contact with two mutually perpendicular side surfaces of a workpiece clamp; one end of a three-degree-of-freedom mechanical arm is connected to the lower part of the L-shaped base in a rotatable manner; and an ultrasonic atomization spraying head is arranged at the other end of the three-degree-of-freedom mechanical arm. The device comprises multiple guide rails and the rotary table, thus providing five degrees of freedom, and can realize polishing of a complicated curved surface to complete machining of a complicated part which is difficult to machine with an existing machine tool.

The invention relates to a method for preparing 5-hydroxymethylfurfural through efficiently catalyzing fructose dehydration by a solid catalyst. The above target product is obtained in a high yield manner through a reaction of fructose as a raw material under mild conditions with a polar solvent as a reaction medium and porous composite metal oxide as a catalyst. The method has the advantages of high yield, few byproducts, environmental protection, mild reaction conditions, simple operation, low corrosion to an apparatus, repeated use of the catalyst, and very strong industrial application prospect.

This invention relates to a cathode flow field plate structure of a self breathing micro-proton exchange membrane(PEM) fuel battery, in which, said flow field is in a double-layer composite hollow structure, the sizes of which are reduced orderly, namely, the side closing to the air of the flow field plate is processed into a hollow runner vertical to the silicon chip direction and the other side closing to the membrane electrode is processed to a runner vertical to the silicon chip corresponding to the hollow runner closing to the air side to let the silicon chip pass through and the size of each runner closing to the membrane electrode is smaller than that closing to the air.

The invention provides a ternary bismuth-based composite photocatalyst Bi / Bi4O5Br2 / BiOI, and a preparation method thereof, which relate to the technical field of semiconductor photocatalytic materials. The preparation method of the ternary bismuth-based composite photocatalyst Bi / Bi4O5Br2 / BiOI comprises the steps of dissolving a bismuth-containing compound, iodate and bromine into ethylene glycol,adjusting a pH value of a solution to 8 to 10, and carrying out hydrothermal reaction. The method is simple in preparation process, low in cost, free of producing toxic and harmful byproducts, and easy for industrial production. The ternary bismuth-based composite photocatalyst Bi / Bi4O5Br2 / BiOI is prepared by the preparation method. The catalyst has better visible light induction capability and pollutant degradation capability, and the utilization rate of solar energy is improved during a catalytic process.

The invention discloses a carbon-silicon composite electrode material and a preparation method thereof. The carbon-silicon composite electrode material can improve the effective dispersity of silicon-containing particles on the surfaces of carbon-containing particles by coating the carbon-containing particles and the silicon-containing particles with organic high-molecular modified films. The carbon-silicon composite electrode material can comprise a carbon-containing conducting film coating the surface of the carbon-silicon composite electrode material to improve effective adhesion of the silicon-containing particles. The preparation method of the carbon-silicon composite electrode material can be completed in an aqueous-phase solution through dry mixing. Therefore, damage of volatile organic compounds to an operator and environment can be effectively avoided. According to the carbon-silicon composite electrode material and the preparation method, the carbon-silicon composite electrode material can effectively improve the electric capacity, the charging and discharging efficiency and the cycle life of a battery product using the carbon-silicon composite electrode material.

The invention relates to a battery cell hot-pressing integrally-molded solid-state battery and a preparation method thereof. The solid electrolyte of the solid-state battery comprises a polymer, and two functions of the electrolyte and a diaphragm are simultaneously achieved in the battery. The solid-state battery is fused into a whole through a hot-pressing process, so that the integrated bondingis realized in the solid-state battery, the effective interface contact between electrode materials and between the electrode materials and different functional layers, such as the solid electrolyte,etc., can be improved, a space charge layer generated by the insufficient solid-phase contact is eliminated, the interface impedance is reduced, the battery coulombic efficiency is improved, and theinterface stress generated by the volume change of the electrode in the charging and discharging process is relieved to a certain extent.

The invention discloses a rotary vibrating screening machine, which comprises a barrel-shaped screening box, a rotating mechanism, a vibrating mechanism and a multistage screening mechanism, wherein the rotating mechanism comprises a rotating shaft and a driving mechanism for driving the rotating shaft to rotate; the rotating shaft is arranged on an elastic bracket in a rotating way; the screening box is fixedly arranged on the rotating shaft in a sleeving way; the elastic bracket is driven by the vibrating mechanism to rotate; the multistage screening mechanism comprises a plurality of stages of screening groups which are obliquely arranged from top to bottom; the screening groups are fixedly arranged between the screening box and the rotating shaft; the diameters of screen pores in the screening groups are gradually reduced from top to bottom; discharge ports corresponding to oversize materials and undersize materials are formed in the downwards-inclined tail end of the screening group of each stage; a feed port for uniformly spreading the materials on the upper end face of the screening group at the highest position is formed in the upper end of the screening box. The rotary vibrating screening machine is simple in structure; the materials can be screened in multiple stages according to production needs, so that the production efficiency and the uniformity of screened particles are effectively improved, and the production cost is lowered.

The invention relates to preparation of hydrophilic acrylic adsorption resin and an application of the acrylic adsorption resin in phenolic wastewater treatment, and belongs to the technical field of the preparation and the application of high molecular material absorption resin. The preparation method comprises the following steps: dissolving polyvinyl alcohol in the water liquid of sodium chloride so as to form an aqueous phase; and forming an oil phase by a pore-forming agent and an initiating agent, namely benzoyl peroxide, by taking acrylate and benzene sulfonate containing carbon-carbon double bond as monomers and taking ethylene glycol dimethacrylate as a cross-linking agent, adding the oil phase to the aqueous phase and carrying out a thermal insulating reaction so as to obtain resin. The mole ratio of the carbon-carbon double bonds of two monomers, namely the acrylate and the benzene sulfonate, is controlled within the range of (4:1)-(8:1), the volume ratio of the oil to the water is controlled at 1: 5, the sodium chloride accounts for 5% in terms of the mass of distilled water, and the polyvinyl alcohol, the ethylene glycol dimethacrylate, the pore-forming agent and the benzoyl peroxide respectively account for 3-5wt%, 4-6wt%, 40-60wt% and 2wt% of the total mass of the reactant. The preparation disclosed by the invention is simple in process; and the preparation lays a foundation for the treatment of phenolic wastewater by virtue of the adsorption resin, so that the preparation has certain practical significance to popularize.

The invention discloses a bismuth oxyiodide / bismuth molybdate composite photocatalyst and a preparation method thereof, belonging to the field of photocatalysis. The bismuth oxyiodide / bismuth molybdate composite photocatalyst is mainly characterized in that separation of photoinduced electrons and holes is facilitated due to a heterojunction structure formed by in-situ transformation of bismuth oxyiodide and bismuth molybdate, and the formed composite photocatalyst has relatively wide spectral response range, and achieves efficient visible light catalytic activity. The preparation method comprises the following steps: 1, preparation of bismuth oxyiodide, namely dissolving bismuth salt in an alcoholic solution of certain volume, slowly adding an iodide alcoholic solution at stoichiometric ratio, uniformly stirring, and preparing a sample through a solvothermal method; and 2, dispersing a certain quantity of bismuth oxyiodide samples prepared in the step 1 in the alcoholic solution, slowly adding a certain quantity of molybdate alcoholic solutions, uniformly stirring, feeding into a reaction kettle and performing a solvothermal in-situ conversion reaction, thus obtaining the bismuth oxyiodide / bismuth molybdate composite photocatalyst. The method is simple in process and low in cost, and the prepared bismuth oxyiodide / bismuth molybdate composite photocatalyst has efficient visible light catalytic activity.

The invention provides a system for processing a nanostructure on the surface of an electrode for a battery by utilizing a femtosecond laser. The system for processing the nanostructure on the surface of the electrode for the battery by utilizing the femtosecond laser comprises a femtosecond laser device, an acoustooptic modulator, a reflecting mirror system, a polarization controller, a laser scanning system and a lens, wherein the femtosecond laser device is used for providing a femtosecond laser pulse; the acoustooptic modulator is used for controlling the on / off of the femtosecond laser device and the repetition frequency of the femtosecond laser pulse; the reflecting mirror system is used for guiding the femtosecond laser into the polarization controller; the polarization controller is used for controlling the polarization state, on the surface of a to-be-processed electrode, of the femtosecond laser; the laser scanning system is used for controlling the light spot of a laser to form a pattern on the surface of the electrode; the lens is used for focusing the femtosecond laser pulse on the surface of the electrode. According to the system for processing the nanostructure on the surface of the electrode for the battery by utilizing the femtosecond laser, the nanostructure on the surface of the electrode of the battery is processed by utilizing the femtosecond laser; the superficial area of the electrode can be drastically improved; thus, the effective contact between the surface of the electrode and an electrolyte is greatly enhanced; the diffusion of ions is increased; the capacity of the battery is increased; a charging speed is quickened; the service life is prolonged; moreover, the production cost, which is brought about by an existing high-temperature high-vacuum technique, of the battery is greatly decreased; the yield is improved.

This invention relates to a cathode flow field plate structure of a self breathing micro-proton exchange membrane(PEM) fuel battery, in which, said flow field is in a double-layer composite hollow structure, the sizes of which are reduced orderly, namely, the side closing to the air of the flow field plate is processed into a hollow runner vertical to the silicon chip direction and the other side closing to the membrane electrode is processed to a runner vertical to the silicon chip corresponding to the hollow runner closing to the air side to let the silicon chip pass through and the size of each runner closing to the membrane electrode is smaller than that closing to the air.

The invention provides an underground gasification device comprising a drilling sleeve (4), a gas injection pipe (1) and a power driving device. The first end of the drilling sleeve (4) is a closed end, and the second end of the drilling sleeve (4) is an open free end. The gas injection pipe (4) extends into the drilling sleeve (4) from the first end and extends out of the drilling sleeve (4) from the second end. The power driving device drives the gas injection pipe (1) to move along the extension direction of the drilling sleeve (4). The invention further provides an underground gasification method. By the underground gasification device and the underground gasification method, gasification agents and organic matters in underground gasification areas are at least ensured to always react with each other through movement of the gas injection pipe.

The invention discloses a gelling agent for prevention and treatment of apple tree diseases and a preparation method thereof. The gelling agent comprises the following components in percentage by mass: 0.1-10% of carbendazim, 0.01-0.5% of a wound healing agent, 3-10% of a binder, 0.1-10% of a wetting dispersant, 1-10% of a brightening agent and the balance of distilled water. The preparation method comprises the following steps: weighing and taking active ingredients carbendazim, the wetting dispersant, the brightening agent and the distilled water according to the measuring requirement of the formula, fully wetting and stirring uniformly, adding the mixture into a sand mill for sanding, discharging into a mixing kettle, adding the wound healing agent, the binder and the rest of the distilled water, mixing uniformly to obtain the gelling agent. According to the gelling agent for prevention and treatment of apple tree diseases and the preparation method thereof, provided by the invention, the low-toxicity medicaments are taken as the active ingredients and have an obvious prevention and control effect on valsa ceratosperma of apple trees; besides, a layer of uniform medicinal film is formed at wounds of the apple trees after the gelling agent is used, the ventilation effect is good, autonomous respiration of apple trees is not influenced, wound infection of apple trees caused by exotic germs can be effectively reduced, the rain washing resisting performance is improved, and the effective duration is prolonged.

The invention discloses a continuous activation separator for a raney nickel catalyst, which comprises a sealed kettle body, and the separator is characterized in that the kettle body comprises a reaction active region and a separating zone at the lower part, the separating zone comprises a settling section in an inverted frustum shape and a concentration section in a cylindrical shape, the settling section is fixedly connected to the reaction active region through a horizontal separator plate, the settling section is communicated to the concentration section at the lower part, a rotatable thickener is passed through a center shaft of the kettle body, a rake frame stirrer is arranged on the thickener, the frame stirrer is positioned in the reaction active region and rotates with the thickener, a hollow sleeve used for communicating with the reaction active region and settling section and sleeved outside the thickener is fixedly arranged on the horizontal separator plate, a reactant inlet and a gas outlet are arranged at the upper end of the reaction active region, a waste liquid outlet is arranged at the upper part of the settling section, a product outlet is arranged at the bottom of the concentration section, and the continuous activation separator has the advantages that the materials can be completely mixed, reaction is fully carried out, and gas-liquid-solid three phases continuous separation after reaction can be simultaneously realized.

The invention discloses an oxygen ion suspension nanometer gold foil stock solution and a preparation method of the oxygen ion suspension nanometer gold foil stock solution, and mainly relates to the field of a skin care product. The oxygen ion suspension nanometer gold foil stock solution comprises the following ingredients in percentage by weight: 30 percent to 40 percent of deionized water, 10 percent to 18 percent of hyaluronic acid, 10 percent to 15 percent of water-solubility collagen, 10 percent to 20 percent of levo Vc, 5 percent to 8 percent of allantoin, 1 percent to 3 percent of sorbitol, 0.1 percent to 1 percent of carbomer, 1 percent to 3 percent of PPG (polypropylene glycol)-4 cetanol polyether-20, 15 percent to 25 percent of gold foil and 3 percent to 5 percent of negative oxygen ions. The oxygen ion suspension nanometer gold foil stock solution has the advantages that good whitening, moisture preserving and anti-wrinkle antioxidation efficacies are achieved; the gold foil can be uniformly suspended; the conduction and revitalizing functions of the gold foil are fully exerted; the water curing performance is obviously improved.

The invention discloses a preprocessing process for bagasse saccharification utilization. The preprocessing process includes the steps of firstly, performing first preprocessing, to be more specific, adding a sodium hydroxide solution into bagasse, and performing constant-temperature water-bath preprocessing under 48-52 DEG C for 0.5-1.5 hours to obtain a bagasse solid-liquid mixture after the first preprocessing; secondly, performing second preprocessing, to be more specific, adding urea into the bagasse solid-liquid mixture after the first preprocessing, fast cooling to minus 14 DEG C to minus 10 DEG C, performing constant-temperature preprocessing for 0.5-1.5 hours, filtering to remove filtrate, and drying filter residues to obtain a preprocessed bagasse sample. By the bagasse preprocessing process, the processed bagasse is high in enzymolysis efficiency, high in reducing sugar conversion rate and low in cost.

The invention relates to a preparation method of superfine silver powder for frontal silver slurry of a photovoltaic cell. By introducing graphene oxide timely in a process of synthesizing superfine silver powder by means of a liquid phase reduction method, action between silver and graphene oxide and dispersity of reduced silver particles are improved by means of electrostatic interaction betweenrich oxygen-containing functional groups on the surface of the graphene oxide and silver ions, and meanwhile, the conductivity of the silver powder is improved by means of relatively high electron mobility, so that inhibition of conductivity of the silver particles by a conventional dispersant is overcome. Compared with the prior art, the preparation method has the advantages of simple and easilyoperated process course, good dispersity of silver, high electron mobility, good conductivity and the like.

The invention relates to a method of restoring organic polluted soil through electro-thermal activation of persulfate. According to the method, an electric field of an electrode heating system drivescontrollable distribution of an oxidant in soil; through an electro-thermal field formed in the electrode heating system, persulfate is activated to efficiently remove organic pollutants, and at the same time, the using amount of persulfate is reduced. The invention provides a novel method of efficiently restoring organic pollutant soil in an energy saving mode.

The invention discloses a desktop 3D printer with a novel wire feeding mechanism. The desktop 3D printer solves the problem of low wire feeding power or wire release. The wire feeding mechanism comprises an external wire feeding mechanism and an internal wire feeding mechanism. A crank sliding block mechanism composed of a support ejection rod and a support inclined rod in the internal wire feeding mechanism is used for adjusting the support diameter. The end of a support shaft is provided with a fastening nut for fixing a self-tightening support inclined rod. A fixing sleeve is arranged at the top of the support ejection rod. The internal wire feeding mechanism utilizes a stepping motor to drive wire feeding gears to rotate. Teeth on the driving wire feeding gear are used for pushing a solid raw material. An adjustable spring has a fine adjustment function and is used for adjusting distances among the auxiliary wire feeding gear, the driving wire feeding gear and a raw material modelso that the effective contact between the driving wire feed gear and the raw material model is improved. The desktop 3D printer has the advantages of feeding stability, small wire feeding resistance,material spraying stability and high printing quality.

The invention discloses a water pollution microbial remediation device with a microbial filler, and belongs to the technical field of water pollution microbial remediation. The device includes a base,and fixing devices of the same structure are fixedly arranged on the periphery of the top of the base. A fixing device driving mechanism matched with the fixing device is fixedly arranged in the center of the top of the base; an oxygen supply mechanism is fixedly arranged at the top of a supporting rod; the front side and the rear side of the outer wall of the oxygen supply mechanism are movablysleeved with microorganism bearing mechanisms of the same structure; under the blades are impacted by external water flow, the whole microorganism bearing mechanism can be driven to rotate, so that the effective contact of the water body pollutants and microbial carriers is increased, and the repairing efficiency is improved; during restoration, an oxygen generator and a micro pump body can be turned on, the micro pump body injects oxygen produced by the oxygen generator into the connecting hose, the oxygen of the connecting hose enters the hollow column and is sprayed out from the nozzles onthe front side and the rear side of the hollow column respectively, the dissolved oxygen amount of water is increased, and the restoration quality is improved.

The invention relates to a radio frequency MEMS switch having elastic beam contacts. The radio frequency MEMS switch mainly comprises a substrate, a microwave transmission wire, a driving electrode, a lower electrode, a fixing anchor point, an upper electrode, a release hole, an air bridge and a leading wire, wherein the microwave transmission wire, the driving electrode and the leading wire are arranged on the substrate, the driving electrode is arranged below the upper electrode, the upper electrode is a straight plate-shaped structure, the upper electrode is fixed on the microwave transmission wire through the fixing anchor point, the lower electrode employs a double-contact structure having double elastic beams, the elastic beams are fixed on the microwave transmission wire through the fixing anchor point, and the double elastic beams are provided with the contacts respectively. From the aspect of mechanical performance, the impact effect of the upper electrode rapidly pulled down under the electrostatic action on the lower electrode can be reduced, the buffer effect is realized, the contacts and the upper electrode are protected, from the aspect of electrical performance, effective contact can be enhanced, switch burning and adhesion caused by weak contact can be avoided, a reliability problem caused by virtual connection of traditional double contacts can be effectively solved, and service life of the switch is improved to a large degree.

The invention discloses a method for preparing carbon-coated nano lithium titanate by rheological phase reaction, which comprises the following steps: mechanically mixing three raw materials: anatase titanium oxide, a lithium salt, and an additive polyvinyl butyral (PVB), adding a proper amount of an organic solvent to regulate the mixed raw materials to a rheological state, oven-drying, and calcinating in a tube furnace under protective atmosphere. Because the method uses rheological phase reaction and uses PVB as the additive, the prepared carbon-coated lithium titanate material has nanoparticles, perfect morphology and uniform particle size distribution, and a uniform, dense and firm carbon-coated layer is formed on the surface of lithium titanate, which greatly improves the electrical conductivity of lithium titanate and effectively improves the cycle performance and multiplying factor performance of the material. The method of the invention is simple, the prepared material has stable performance and simple and controllable process flow, can realize industrial production, and the prepared carbon-coated nano lithium titanate material has excellent electrochemical properties and has a wide application prospect in the field of power batteries.

The invention discloses composite system glass powder which is formed by combining tellurite, borate and silicate and is used for silver paste of an auxiliary gate electrode of a crystalline silicon solar cell. In the temperature rising process of sintering of the auxiliary gate electrode silver paste, the tellurite is firstly melted and spread on the silicon surface, so that the sintering reaction between silicon and silver is blocked; then, borate is melted and penetrates through the antireflection layer on the silicon surface in an etching mode, and a silver-silicon conductive contact window is opened; and finally, melting the silicate to inhibit the erosion of the glass melt to the silicon surface and generate a passivation effect. In the cooling process after sintering, silver dissolved by tellurite and brought to the interface is separated out, and a large number of silver colloid particles are formed. Therefore, the composite system glass powder provided by the invention has the effects and characteristics of increasing effective contact of silver and silicon, reducing contact resistance, passivating a silicon surface and the like, and the application performance of the auxiliary gate electrode silver paste can be remarkably improved.

The invention provides a sterilization device and a sterilization method. The sterilization device comprises a sterilizing medium generating mechanism, a conveying mechanism and a drum; the drum comprises a feeding port and a discharging port; the feeding port and the discharging port are respectively formed on the two opposite ends of the drum along an axis direction of the drum; the sterilizingmedium generating mechanism is connected with the feeding port; one end of the conveying mechanism is connected with the feeding port; the other end of the conveying mechanism is connected with the discharging port in the manner of penetrating through the drum. The sterilization device and the sterilization method provided by the invention are high in degree of automation and treatment efficiency.

The invention provides a preparation method of AlON powder, the AlON powder and application of the AlON powder, and the method comprises the following steps: weighing nano aluminum oxide powder and carbon powder according to a mass ratio, adding 0-10wt% of a dispersant, and mixing by taking absolute ethyl alcohol as a medium and adopting a ball milling method to obtain mixed powder; sintering the mixed powder by using a carbon thermal reduction nitridation method; carrying out planetary ball milling treatment on the sintered powder, adding 0-10wt% of a dispersing agent by taking absolute ethyl alcohol as a medium after the treatment is finished, and carrying out dispersion treatment by adopting ultrasonic waves, so as to obtain the AlON powder, the dispersing agent is added step by step, the overall dispersing performance of the powder is improved, the AlON powder with high dispersity, high phase purity, small particle size and high sintering activity is prepared, the AlON powder is applied to preparation of the AlON transparent ceramic, and the AlON transparent ceramic with good performance can be obtained.

The invention discloses a visible-light-driven photocatalyst based on a mineral composite material and a preparation method thereof. The visible-light-driven photocatalyst is prepared based on a kaolin material, kaolin is a typical two-dimensional layered mineral and is composed of a silicon-oxygen tetrahedron and an aluminum-oxygen octahedron, rich surface bonding, hydroxyl structures, adsorption sites and micron-sized sizes enable the finally prepared catalyst material to be irregular blocky aggregates, the product size is 1-10 microns, the catalyst has a large specific surface area and active sites, agglomeration of a heterojunction structure can be avoided, and the catalytic degradation efficiency is remarkably improved after the catalyst is in effective contact with pollutants; trace tetracycline hydrochloride with the concentration not larger than 40 ppm can be rapidly treated, and the catalytic efficiency can reach 88.23%.