184results about How to "Reduce transmission resistance" patented technology

The invention provides a preparation method of a hollow flat plate structure type ceramic filter membrane element. The method comprises the following steps: (1) preparing a hollow structure type ceramic membrane supporting body by using an extrusion molding method, namely sintering aluminum hydroxide obtained by calcination at 600 DEG C as a main raw material to prepare the ceramic membrane supporting body; (2) preparing the ceramic filter membrane by using a plasma spray method. When the ceramic membrane supporting body is prepared, the selected and used raw material is calcined aluminum hydroxide, so that the sintering temperature of the ceramic membrane supporting body can be greatly reduced, and the sufficient strength of the supporting body can be guaranteed; when the ceramic filter membrane layer is prepared, the thickness of the filter membrane can be excellently controlled by using the plasma spray process, and the filter resistance is reduced; the membrane layer has the uniform pore size distribution and the high separation accuracy; the membrane layer is closely combined with the supporting body. The ceramic filter membrane is prepared by using plasma spraying without sintering, so that the process is simple, the production cost of the ceramic filter membrane can be effectively reduced, the production efficiency is improved, and the process can be widely applied to the fields of sewage treatment and filtration, solid-liquid chemical separation, and the like.

A flexible conductive ribbon is ultrasonically bonded to the surface of a die and terminals from a lead frame of a package. Multiple ribbons and / or multiple bonded areas provide various benefits, such as high current capability, reduced spreading resistance, reliable bonds due to large contact areas, lower cost and higher throughput due to less areas to bond and test.

The invention discloses nitrogen-doped grading porous carbon microspheres. The nitrogen-doped grading porous carbon microspheres are prepared by performing hydrothermal reaction on glucose and a nitrogen-containing compound and then performing activation, wherein the specific surface area is high and is 1160 to 1791 m<2> / 1, the pore diameter is distributed uniformly and the micropore content is high. The preparation method comprises the following steps: 1) preparing a nitrogen-containing precursor, adding the glucose and the nitrogen-containing compound into water, stirring uniformly, reacting, filtering, washing and drying to obtain the nitrogen-containing precursor; 2) carbonizing and activating the nitrogen-containing precursor, mixing the nitrogen-containing precursor and an alkaline inorganic matter, soaking into water, stirring and drying, and calcining and activating to obtain the nitrogen-doped modified grading porous carbon microspheres; and 3) performing aftertreatment on thenitrogen-doped modified grading porous carbon microspheres, soaking the nitrogen-doped modified grading porous carbon microspheres in a hydrochloric acid solution, washing, filtering, drying and grinding. When the nitrogen-doped grading porous carbon microspheres serve as supercapacitor electrode materials, the specific electric capacity is 248 to 407 F / g. The nitrogen-doped grading porous carbonmicrospheres have an application prospect in the fields of supercapacitors, lithium ion batteries and electric catalysis.

The invention discloses a high-multiplying power lithium ion battery and a preparation method thereof. The lithium ion battery comprises a cathode plate, an anode plate, a composite diaphragm and an electrolyte solution, and the surfaces of the diaphragm are coated with composite conductive layers; each composite conductive layer is composed of a bonding agent, a conductive agent and micropores; the cathode plate and the anode plate are each of a full-tab structure. The preparation method comprises the steps that the diaphragm coated with the composite conductive layers, the cathode plate and the anode plate are subjected to a winding process to prepare a wound core, and the wound core is subjected to the processes of packaging, baking, liquid injecting, hot-cold pressing, forming and capacity grading to prepare the high-multiplying power lithium ion battery. According to the high-multiplying power lithium ion battery and the preparation method thereof, by improving the characteristics of the interfaces between the diaphragm and cathode and anode membranes and optimizing the structural design of the battery, the bonding performance of the contact interfaces between the diaphragm and the cathode and anode plates is improved, the lithium ion transfer resistance between the different interfaces is decreased, the electronic conductivity of the cathode and anode plates is enhanced, the porosity and the air permeability of the composite diaphragm are improved, wetting of the electrolyte solution to the diaphragm is improved, the retaining capacity of the electrolyte solution in the battery is improved, the high-multiplying power performance of the lithium ion battery is greatly improved, the high-multiplying power discharge capacity retention rate is increased by 10% or above compared with the prior art, and the high-multiplying power lithium ion battery is suitable for industrialized production.

The invention discloses a preparing method of porous monocrystal IT MoS2 nanosheet. The method comprises the steps of 1, preparing 2H crystal form MoS2 nanosheet using hydrothermal method; 2, conducting stripping of multi-layered 2H crystal form MoS2 nanosheet with ultrasonic wave and assisting with a lithium-ion intercalation method. The 1T MoS2 nanosheet can be directly used for electro-catalysis hydrogen production, and compared with MoS2 with other structures, electro-catalysis hydrogen production property can get fast improvement, porous structure provides more edges for the catalysis, therefore can expose more active sites, which is beneficial to electro-catalysis hydrogen production; single-layered structure enables larger specific surface area of the catalyst, can provide more reaction active sites. Compared with a multi-layered structure, a single-layered structure reduces electric transmission resistance between layer and layer, is beneficial to transmission and transfer of electricity, thus accelerating velocity of electro-catalysis hydrogen production.

The invention discloses a polyamide film composite membrane and a preparation method and application thereof. The composite membrane comprises a polymer support layer and a polyamide active layer. The polyamide active layer is obtained by a reaction of a multielement acyl chloride solution and a polyamine aqueous solution containing a tertiary amine additive. In the preparation process, the polyamine aqueous solution containing the tertiary amine additive and the multielement acyl chloride solution undergo an interfacial polymerization reaction to produce the modified polyamide active layer so that the film-forming process is greatly simplified. The composite membrane has a high crosslinking degree and high compactness, and has a high water flux in membrane separation, a low reverse salt flux and good anti-fouling properties.

This invention relates to a neuron network runner dual-pole plate used in PEM fuel batteries, one side of the pole plate is set with a cathode flow field for transmitting oxidizer gas, the other side is set with anode runners for transmitting fuel, inlets and outlets of gas and cooling fluid are set on the pole plate, a flow field transition region and a flow field reaction region set in it and connected with it are placed near the gas inlet / outlet, in which, the runners of the transition region are in the structure of a multi-channel neuron network., the length of runners in the field and the flowing resistance of gas in the runners are almost the same so it is favorable for gas flowing in the field uniformly.

The invention relates to a preparation method of a low-porosity positive pole piece suitable for a solid-state battery and the solid-state lithium metal battery. The positive pole piece is composed ofan active material, a conductive agent, a binder (having lithium ion conduction capability) and a current collector, and is characterized in that the positive active material is primary particles orlarge single crystals, and the typical size of the positive active material is 50 nm to 30 [mu] m; the binder, the conductive agent and the current collector have a synergistic effect, so that the integrity of ions and electronic channels in the pole piece is guaranteed; and the porosity of the pole piece is less than 20%. The pole piece provides a transmission channel for ions and electrons, so that the pole piece is in good interface contact with solid electrolyte and is suitable for a solid-state lithium metal battery.

The invention relates to a method for preparing a lignin-based hierarchical porous carbon material with halloysite as a template, which belongs to the technical field of environmental functional material preparation; the invention uses halloysite nanotubes, a natural mineral that is abundant in reserves and cheap and easy to obtain, as a template ; Sodium lignosulfonate and halloysite are mixed by liquid phase impregnation; then calcined, the template carbon material is initially obtained, which contains more mesopores and macropores; pores, and further obtain hierarchical porous carbon materials; the hierarchical porous carbon materials prepared by this method have been successfully applied to the efficient separation of tetracycline and chloramphenicol in aqueous environments, and have excellent regeneration performance.

The invention relates to a polyamide composite membrane and a preparation method thereof, and belongs to the field of membrane separation. The composite membrane comprises a polymer support layer and a polyamide active layer composited on the polymer support layer; the polyamide active layer is obtained by carrying out a reaction of a polyamine aqueous solution containing a tertiary amine additive with a polyacyl chloride solution; in the preparation process, the polyamine aqueous solution containing the tertiary amine additive and the polyacyl chloride solution undergo interfacial polymerization, and the body modified polyamide active layer is obtained, so that the membrane preparation process is greatly simplified. The composite membrane has high water flux, low reverse salt flux, good anti-pollution performance and good membrane separation performance.

The invention discloses a treatment method of a concentrated solution produced from landfill leachate by a membrane method. The treatment method comprises the following steps of enabling the concentrated solution produced from the landfill leachate by the membrane method to sequentially pass through a composite softening coagulation and sedimentation pond, an ozone oxidation reactor, a hydrolyzing pond and an anaerobic MBR pond, and enabling effluent water from the anaerobic MBR pond to enter a nanofiltratoin system; enabling a permeation solution obtained through treatment of the effluent water in the nanofiltratoin system to be treated by a pressure contact oxidation reactor, and directly discharging the treated permeation solution, or after filtering the treated permeation solution by a multi-medium filter, discharging the filtered permeation solution; mixing a concentrated solution obtained after treatment by the nanofiltratoin system with the landfill leachate so as to obtain a mixed solution; and performing concentration treatment on the mixed solution by a biochemical method, an MBR method and the membrane method so as to obtain a concentrated solution, enabling the concentrated solution to enter the composite softening coagulation and sedimentation pond, and performing subsequent operations. The treatment method disclosed by the invention not only is suitable for treatment of the concentrated solution produced from the landfill leachate by membrane filtration, but also is suitable for treatment of other membrane concentrated solutions containing high concentration of organic compounds which are difficult to degrade.

An electric machine (1) and to a method for producing the machine (1), including a housing (2) and a stator (3) accommodated therein, as well as at least one rotor (4) arranged radially inside the stator (3), a plastic body (7) that at least radially surrounds the outside of a soft-magnetic core (5) of the stator (3), and a cooling device (10) located between the stator (3) and the housing (2) is provided. In order to improve the cooling device (10), at least one recess (11) that conveys a cooling medium is created between the housing (2) and the stator (3) at least partially in the outer circumferential surface of the plastic body (7).

The invention provides a membrane electrode assembly of a fuel cell. The membrane electrode assembly comprises a gas diffusion layer, a micro-porous layer, a catalysis layer and an electrolyte membrane which are successively overlapped; in a direction of an air flow path, the thickness of the micro-porous layer is gradually reduced, the thickness of the catalysis layer is gradually increased, andthe total thickness of the micro-porous layer is consistent with the total thickness of the catalysis layer. The invention also provides a production method of the membrane electrode assembly of the fuel cell. The membrane electrode assembly of the fuel cell has the functions of balancing the content of water in areas of a gas inlet and a gas outlet of the fuel cell, finally improving the stability of the fuel cell under various temperatures and humidities, improving durability, reducing the catalyst loading capacity, and the like.

The invention discloses a gel electrolyte for a lithium ion secondary battery. The gel electrolyte comprises the following components by mass percent: 70%-90% of an electrolyte substrate (A), 0.1-25% of polymerizable monomers (B,C), 0.1-10% of an initiator (D), and 0.1-15% of a foamer (E), wherein the polymerizable monomers (B,C) comprise a first polymerizable monomer (B) and a second polymerizable monomer (C), and the first polymerizable monomer (B) can be dissolved in the electrolyte substrate (A) but the homopolymer of the first polymerizable monomer (B) can not be dissolved in the electrolyte substrate (A), and the second polymerizable monomer (C) and the homopolymer thereof can be dissolved in the electrolyte substrate (A); the foamer (E) has the chemical formula as shown in the description, wherein X is one of metallic ions including Mn, Mg, Al and the like or ammonium salt materials, and Y is one of alkyl compounds with H atoms and 1-10 carbon atoms or aryl compounds. According to the invention, the chemical safety performance is good, electrical property is superior, and the cycle performance and the rate performance of the battery is preferable, the service life of the battery is prolonged greatly.

The invention discloses a preparation method for a one-dimensional tubular MOF material. The preparation method comprises the following steps of: dispersing ZnCo-BTC nanowires in an aqueous ethanol solution to form a uniform suspension A; dissolving 2-methylimidazole in another aqueous ethanol solution to form a solution B; heating the solution B in a water bath kettle to a reaction temperature, pouring the suspension A, carrying out a reaction under stirring at a constant temperature, and subjecting a product to centrifugation; and then washing the product with ethanol and deionized water insequence, and finally carrying out drying to obtain the one-dimensional tubular MOF material. The one-dimensional tubular MOF material is annealed in argon and then pickled to obtain a one-dimensionalnitrogen-doped porous carbon nanotube material. The preparation method of the invention has the advantages of simple operation, low cost and easily controllable process; and the prepared product canbe applied not only to electrochemical lithium ion storage, but also to other fields such as separation, catalysis, sustained drug release and energy.

The invention relates to a milling handset for preventing the entering of blood, which comprises an outer sleeve, a boot sleeve which is engaged with the lower part of the outer sleeve, a driving shaft cylinder which is engaged in the outer sleeve, a milling cutter sleeve which is fixedly connected in the lower part of the driving shaft cylinder, a sleeve which is connected with the lower end of the driving shaft cylinder through threads, a hole whose upper part penetrates into the lower part of the boot sleeve and a milling cutter which is fixedly connected in the milling cutter sleeve through steel balls. The invention is characterized in that a spiral sealing sleeve is arranged on the outer sides of the lower portions of the sleeve, the spring and the driving shaft cylinder, the outer side of the spiral sealing sleeve is engaged with the inner wall of the lower part of the boot sleeve, a liquid outlet ring groove is arranged on the bottom of the boot sleeve, liquid outlets are arranged along the bottom of the liquid outlet ring groove, a relief overflow ring groove is arranged on the middle part of the boot sleeve, and overflow holes are arranged along the bottom of the relief overflow ring groove. The invention can effectively prevent blood from entering into the inner portion of the milling handset, largely prolongs the maintenance cycle of the milling handset, and excellently meets the clinical requests.

A clip for a semiconductor device package may include two or more separate electrically conductive fingers electrically connected to each other by one or more electrically conductive bridges. A first end of at least finger is adapted for electrical contact with a lead frame. The bridges are adapted to provide electrical connection to a top semiconductor region of a semiconductor device and may also to provide heat dissipation path when a top surface of the fingers is exposed. A semiconductor device package may include the clip along with a semiconductor device and a lead frame. The semiconductor device may have a first and semiconductor regions on top and bottom surfaces respectively. The clip may be electrically connected to the top semiconductor region at the bridges and electrically connected to the lead frame at a first end of at least one of the fingers.

The invention discloses a preparation method of a vanadium compound electrode material and application of the vanadium compound electrode material in an aqueous zinc ion battery. The method comprisesthe following steps: dispersing a vanadium compound into a water solvent; performing maintaining for 2 to 120 hours at a temperature of 100 to 200 DEG C; performing cooling to room temperature, performing washing and drying to obtain a vanadium compound active material; mixing the obtained vanadium compound active material with a conductive adhesive according to a mass ratio of (6-9): (4-1) to prepare a slurry, immersing a current collector into the slurry, taking out the current collector, performing drying, and repeating the immersing and drying processes for 10-30 times to obtain a vanadiumcompound electrode material; and taking the obtained vanadium compound electrode material as a positive electrode material, taking a Zn foil as a negative electrode, and preparing the aqueous zinc ion battery from the vanadium compound electrode material and a battery electrolyte. By utilizing the conductive adhesive and the three-dimensional current collector, the conductivity of the electrode is improved, the unit area loading capacity of an active material on the electrode is improved, and the electrochemical performance of the aqueous zinc ion battery is improved.

The present invention is a pumped fluid cooling system and method. The pumped fluid cooling system and method includes new relative magnitudes of advection, convection and spreading components of the resistance for a pumped fluid system. The pumped fluid cooling system and method also includes adjusting the chemical composition of the working fluid, specifically adjusting the composition and viscosity as the sensitivity to the fluid heat capacity per unit mas increases.

The invention discloses a nanofiltration membrane, a preparation method and application thereof. The nanofiltration membrane comprises a support bottom membrane and an active separation layer arrangedon the support bottom membrane, wherein the active separation layer has an interpenetrating network structure, and the interpenetrating network structure is mainly formed by interpenetrating polyamide formed by an interfacial polycondensation reaction of a polyethyleneimine monomer and an acyl chloride monomer with ultrafine nanofibers. The preparation method comprises the following steps: arranging an ultrafine nano-fiber layer on a micro-filtration membrane to prepare an ultrafine nano-fiber / micro-filtration membrane composite substrate; and carrying out an interfacial polycondensation reaction on a polyethyleneimine monomer and an acyl chloride monomer on the surface of the superfine nanofiber / micro-filtration membrane composite substrate, and carrying out heat treatment to obtain thenano-filtration membrane. The preparation method of the nanofiltration membrane is simple, and the obtained nanofiltration membrane has high flux and high salt rejection performance, so that the desalination energy consumption cost is reduced, and the nanofiltration membrane has a wide application prospect in the aspects of seawater desalination pretreatment, water softening and the like.

The invention discloses a preparation method of a sulfide nano-compound counter electrode based on a porous CuS architecture. The preparation method comprises the following steps that CuS nano powder is prepared; the CuS nano powder is prepared into CuS slurry; a porous CuS nanosheet counter electrode is prepared by utilizing the CuS slurry; the porous CuS counter electrode is utilized to prepare the sulfide nano-compound counter electrode based on the porous CuS architecture. The preparation method is simple in process, low in cost, capable of achieving large-area preparation and good in repeatability, the prepared sulfide nano-compound counter electrode has the advantages that electrons are rapidly transmitted and the electrode stability is improved by utilizing a TiO2 shell layer, the transmission resistance of electrons in an electrolytic solution is reduced by utilizing macroporous structures among CuS nanosheets, the catalytic activity is improved by utilizing the synergistic effect of compound sulfide, and the method makes battery performance greatly improved.

The invention provides a motor drive axle, which includes an axle housing, a motor, a reducer, a left half shaft and a right half shaft of a differential, and the axle housing includes a hollow cylindrical middle axle housing and Left and right axle housings arranged on both sides of the intermediate axle housing, the left and right axle housings are connected to the intermediate axle housing by bolts; the motor, the reducer and the differential The motor is integrated in the intermediate axle housing, the output shaft of the motor is connected to the input end of the reducer, and the output end of the reducer is connected to the input end of the planetary gear train of the differential. The output ends of the planetary gear train are respectively connected to the left and right half shafts; a manual parking device is arranged on the left half shaft or the right half shaft. The invention has the advantages of light weight, compact structure, simple installation, high power density, high efficiency and low cost.

The invention discloses a preparation method and an application of core-shell-structured nickelous hydroxide or hierarchical porous carbon composite material. The preparation method specifically takes porous carbon as a template, takes hexamethylene tetramine and nickel nitrate as precursors, and prepares the core-shell-structured nickelous hydroxide or the hierarchical porous carbon composite material by adopting a single-step hydrothermal reaction method. The prepared nickelous hydroxide or the hierarchical porous carbon is used for a supercapacitor. When the nickelous hydroxide or the hierarchical porous carbon is used as composite electrode material, the specific capacitance is up to 2952 F / g, and 81% of initial specific capacitance is still kept after 1000 times of circulating charge and discharge. The nickelous hydroxide or the hierarchical porous carbon composite material which is prepared by the method effectively achieves synergistic effect between electrode materials, is excellent in electrochemical performance, and obtains wide application in the field of supercapacitor materials.

A heat spreader includes thin films opposite to each other; cooling liquid filling an internal space between the thin films; and a vibration generating means for vibrating the liquid. Accordingly, the heat spreader has excellent heat spread performance compared to a conventional heat spreader, so can have an ultra slim type structure. Also, the heat spreader has excellent heat spread performance regardless of a direction of gravity, and a space between the thin films is sealed in a state of an atmospheric pressure, to maintain the improved heat spread performance for a long time.

The present invention relates to a process comprising A) providing a microbial fuel cell comprising i) an anode containing one or more electrically conductive materials which is arranged to provide flow paths for electrons through the electrically conductive material, ii) microbes in electrical contact with the anode iii) a cathode containing one or more electrically conductive materials iv) a catholyte, v) a conduit for electrons in contact with both the anode and the cathode which is a part of a circuit; B) introducing a mixture of one or more electrolytes or one or more electrolytes dissolved in a first fluid with a second fluid containing biodegradable material; C) contacting the mixture of B) with the anode in the presence of microbes; D) contacting the cathode with a catholyte; E) removing from the microbial fuel cell the fluid mixture.

The invention discloses a fuel cell electrode with a catalyst growing on an ordered structure microporous layer in situ and a preparation method of a membrane electrode, and relates to the field of fuel cells. The fuel cell electrode comprises an electrode substrate layer, a hydrophobic layer, an ordered structure hydrophilic layer and a catalyst, wherein a hydrophobic layer is prepared on the electrode substrate layer, a hydrophilic layer with an ordered structure is prepared on the hydrophobic layer, and catalysts are uniformly distributed on the hydrophilic layer with the ordered structure.According to the invention, the platinum-based catalyst directly grows on the hydrophilic layer with the ordered structure in situ, so that the catalyst shows different morphologies such as nanoparticles, nanowires, nanorods and nano dendrites on the microporous layer, the electrochemical active surface area and catalytic activity are increased, the transmission resistance between the microporouslayer and the catalytic layer is reduced, and the performance of the battery can be effectively improved; in addition, the catalysts with special morphologies such as nanowires, nanorods, nano dendrites and the like have excellent stability, so that the durability of the battery is effectively improved.

The invention discloses a redox catalyst for metal-air fuel cells and a preparation method of the redox catalyst and belongs to the technical field of air fuel cells. A formula of the redox catalyst for the metal-air fuel cells comprises the following ingredients: 20g to 50g of Pt / c platinum / carbon, 30g to 50g of melamine, 40g to 60g of ferric chloride, 20g to 40g of potassium hydroxide, 15g to 30g of methanol, 20g to 30g of Nafion solution and 10g to 20g of alumina polishing powder. The preparation method of the redox catalyst for the metal-air fuel cells comprises the following specific steps: (S1) obtaining a platinum-carbon mixture; (S2) obtaining a catalyst coagulum; (S3) carrying out uniform mixing thoroughly; (S5) preparing redox catalyst powder. According to the redox catalyst and the preparation method thereof, the perfluorosulfonate polymer Nafion solution is adopted as a coating and a support of the catalyst, so that a membrane electrode can be formed, and the transfer resistance of substances and the resistance of the electrode are lowered; the prepared redox catalyst is low in price and can meet the development requirements of large-scale commercial fuel cells.

A semiconductor device is disclosed. The semiconductor device includes a semiconductor substrate having an active area and a source electrode formed on the semiconductor substrate. The source electrode is covered by a hard passivation layer and an opening is formed in the hard passivation layer. An under bump metal (UBM) layer used as a barrier film is formed broader than the opening to reduce a spreading resistance during the operation of the semiconductor device and a warp amount of the semiconductor substrate caused by variation of temperature.