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 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.

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 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.

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 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 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 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.