157results about How to "Increase capacitance" patented technology

The invention discloses a method for preparing a graded porous nickel electrode by step-by-step dealloying and application thereof, and the method comprises the following steps: spraying a nickel-aluminum material on a nickel-based substrate to obtain a first intermediate product; performing heat treatment on the first intermediate product to obtain a second intermediate product; the second intermediate product is sequentially placed in alkali liquor with different concentrations for step-by-step activation, and the graded porous nickel electrode is obtained; in the step of step-by-step activation, the concentration of the alkali liquor is gradually reduced, and the activation temperature is gradually reduced. According to the graded porous nickel electrode, the efficient mass transfer rate and catalytic efficiency are guaranteed; the bonding strength between the coating and the substrate is high, the interlayer structure is stable, the mechanical property and stability are good, and the service life is long; and the hierarchical porous structure can be constructed only through step-by-step activation, so that the preparation process is remarkably simplified.

The embodiment of the invention discloses an array substrate and a display panel, the array substrate comprises a substrate and a plurality of conductive layers, the plurality of conductive layers at least comprise a first conductive layer, a second conductive layer and a third conductive layer which are laminated, the first conductive layer comprises a grid electrode of a driving transistor and a first polar plate connected with the grid electrode of the driving transistor, and the second conductive layer comprises a second polar plate connected with the grid electrode of the driving transistor. The second conducting layer comprises a second polar plate, the third conducting layer comprises a third polar plate, and the vertical projection of the first polar plate on the substrate and the vertical projection of the second polar plate on the substrate are overlapped and respectively form an upper polar plate and a lower polar plate of the storage capacitor; and the vertical projection of the second polar plate on the substrate and the vertical projection of the third polar plate on the substrate are overlapped and respectively form an upper polar plate and a lower polar plate of the voltage-stabilizing capacitor. According to the technical scheme provided by the embodiment, through the storage capacitor and the voltage stabilizing capacitor which are stacked up and down, the layout space utilization rate is improved, the capacitance value of the storage capacitor is increased, and the display effect is improved.

The invention provides nanocrystalline barium titanate dielectric ceramic, a preparation method thereof and a ceramic capacitor, and belongs to the technical field of ceramic materials. The preparation method of the nanocrystalline barium titanate dielectric ceramic comprises the following steps: adding barium titanate into a first solvent, and carrying out ultrasonic atomization to obtain barium titanate slurry; adding holmium nitrate, yttrium nitrate, dysprosium nitrate, calcium nitrate, magnesium nitrate, manganese acetate and zinc acetate into an inorganic solvent to obtain an inorganic doped solution, and adding tetraethoxysilane into a second solvent to obtain an organic doped solution; uniformly mixing the barium titanate slurry, the inorganic doping solution and the organic doping solution to obtain mixed slurry; adjusting the pH value of the mixed slurry to be alkaline, standing and precipitating, drying, sieving for the first time, and pre-sintering to obtain powder; sieving the powder for the second time, uniformly mixing the powder with a binder, sieving for the third time, granulating, and carrying out compression molding to obtain a green body; and degumming and sintering the green body to obtain the nanocrystalline barium titanate dielectric ceramic.

The invention belongs to the technical field of electrode materials, and discloses an arene-synthesized graphene self-assembled porous carbon material and a preparation method and application thereof.The preparation method comprises the steps that 1, in the presence of protective gas, a solvent, a catalyst and optional fused salt, silicon dioxide aerogel serves as a template, arene serves as a reaction monomer, a reaction is conducted, and an arene-synthesized graphene self-assembled porous carbon material is obtained; a graphene self-assembled precursor material is obtained; and (2) carrying out carbonization treatment on the graphene self-assembled precursor material to obtain the arene synthesized graphene self-assembled porous carbon material. Aromatic hydrocarbon is combined with silicon-oxygen bonds on the surface of a silicon dioxide template, interaction of large pi bonds between graphene sheet layers is broken, and the problem that graphene materials are prone to stacking can be effectively solved; the graphene self-assembled porous carbon material prepared by the method is high in specific surface area, high in conductivity and excellent in capacitive performance.

The invention provides an ultra-high-speed electric connector which comprises an insulating body, the insulating body is provided with a lengthwise slot, a plurality of terminal slots are formed in lengthwise side walls on the two sides of the slot respectively, and a fool-proof part is arranged in the slot and used for dividing the insulating body into a power supply and low-speed signal area and a high-speed signal area which are located on the two sides of the fool-proof part; the plurality of terminals comprise differential signal terminals distributed in the high-speed signal area and other terminals distributed in the high-speed signal area and the power supply and low-speed signal area, every two differential signal terminals are adjacent, and two sides of every two adjacent differential signal terminals are respectively provided with a grounding terminal; every two adjacent differential signal terminals and two grounding terminals located on the two sides of the two differential signal terminals form a terminal module, and the two differential signal terminals and the two grounding terminals of each terminal module and an insulating block inserted into the insulating body are formed in an embedded mode. The ultra-high-speed electric connector can enable signal transmission to be better and more stable.

The invention belongs to the technical field of integrated photoelectronics, and discloses an MOS (Metal Oxide Semiconductor) type silicon-on-chip electro-optical modulator based on colloid nanocrystals and a preparation method thereof. The silicon waveguide layer is arranged above the waveguide cladding layer; optical couplers used for inputting and outputting optical signals are arranged at the two ends of the silicon waveguide layer; the dielectric layer is arranged above the silicon waveguide layer in a covering manner; a colloidal nanocrystalline layer disposed over the dielectric layer; the upper electrode layer is arranged above the colloid nanocrystalline layer; the lower electrode layer is communicated with the silicon waveguide layer; and the dielectric layer is used for changing the polarization state according to an external voltage and controlling the inductive charge concentration in the colloid nanocrystalline layer and the silicon waveguide layer through the polarization state. The room-temperature liquid phase processing procedure of the colloidal nanocrystal is simple, and is completely compatible with a silicon-based CMOS (Complementary Metal Oxide Semiconductor) process, so that low-cost and large-scale integration can be carried out; the colloidal nanocrystal has a plasma dispersion effect stronger than that of a silicon material, is easy to realize an ENZ effect, and can realize high modulation efficiency and high modulation depth.

A relay contact resistance and current on-line monitoring system and method belong to the technical field of real-time on-line monitoring of railway signal equipment and comprise a core data processing module, a contact voltage test module, a contact current test module, a data transmission module, a coil voltage acquisition module and a power supply module. The core data processing module is respectively connected with the contact voltage test module, the contact current test module, the data transmission module and the coil voltage acquisition module, the contact voltage test module is connected with a normally open contact or a normally closed contact of a relay, and the contact current test module is connected with a conversion contact of the relay. And the coil voltage acquisition module is connected with a coil terminal of the relay. The relay contact resistance value is reported in real time in the working process of the relay, and therefore the problem that faults caused by the fact that the relay contact resistance exceeds the standard cannot be prevented and processed in time is solved.

The embodiments of the present disclosure disclose a layout design method, a design device, and a computer-readable storage medium, the design method comprising: obtaining an initial layout; generating a first unit layout according to the initial layout, the first unit layout comprising a first power layout, a second power layout, and a first capacitor layout located between the first power layout and the second power layout; determining target parameters of a second capacitor layout to be added according to the first capacitor layout; adding the second capacitor layout to the first unit layout according to the target parameters, and connecting the second capacitor layout to the first capacitor layout.

The application provides a non-continuous three-phase rectifier adjustable power decoupling method, and relates to the field of power electronics. The method is characterized in that a capacitor equivalent circuit is connected in parallel to the DC side of a three-phase PWM rectifier, the capacitor equivalent circuit is composed of a first capacitor connected in series with an active negative capacitor circuit, and a digital signal controller is used to sample the relevant voltage and current signals of the AC side and the DC side, and the active negative capacitor capacitance is adjusted by controlling the switching tube, so that the equivalent capacitor circuit can be flexibly adjusted. The application does not require an additional DC power supply, the capacitance and inductance of the passive device used are small, and the volume advantage is significant. The closed-loop control has high precision and equivalent inhibition effect as the traditional large capacitor. The equivalent capacitance is adjusted only by software, the external physical structure does not need to be changed, and the adjustment range is wide. The preset DC side voltage fluctuation amplitude can be calculated and adjusted automatically, different unbalanced working conditions can be adapted, the fluctuation suppression demand can be met, different working modes can be switched according to the AC side working condition, and the application is not continuously operated, so that the switching loss is lower.

The present invention discloses a carbon matrix composite vanadium nitride nanoarray and a preparation method therefor and use thereof. The preparation method includes the following steps: dissolve vanadium pentoxide into an organic solvent to obtain a mixed solution; place a carbon matrix into the mixed solution to undergo a solvothermal reaction and wash and dry a product of the reaction to obtain a precursor; and heat and calcine the precursor in an ammonia atmosphere to obtain the carbon matrix composite vanadium nitride nanoarray. The present invention provides a composite structure of vanadium nitride nanoparticles and a three-dimensional flexible carbon matrix, which can effectively alleviate the volume change generated during an electrode reaction process, significantly improve the cycle life of the battery, provide excellent electrochemical performance, and enhance the charge-discharge efficiency.

A capacitor structure includes lower and electrodes, and a capacitor dielectric film interposed therebetween. The lower electrode includes a lower electrode film including a first metal element, a first doped oxide film including a second metal element and an oxide of the first metal element, and a first metal oxide film. The first metal oxide film includes an oxide of the first metal element and is free of the second metal element. The upper electrode includes an upper electrode film including the first metal element, a second doped oxide film including the second metal element and an oxide of the first metal element, and a second metal oxide film that includes an oxide of the first metal element, and is free of the second metal element.

The present invention discloses a nano-diamond / graphene composite vertical lamella film electrode and a preparation method thereof. Through a hot wire chemical vapor deposition system and a microwave plasma vapor deposition system, the relative contents of graphite and diamond on the film surface are effectively regulated to prepare a nano-diamond / graphene composite vertical lamella film electrode with supercapacitor characteristics.

The invention discloses a preparation method of copper modified lignin carbon nanospheres, which comprises the following steps: adding lignin into tetrahydrofuran, uniformly dissolving, adding water, stirring to remove tetrahydrofuran, and carrying out hydrothermal reaction to obtain lignin nanospheres; zinc nitrate and copper chloride are added into water, and a solution A is obtained; adding adenine into DMF (Dimethyl Formamide) and heating until the adenine is dissolved to obtain a solution Adding lignin nanospheres into water, and ultrasonically dispersing uniformly to obtain a solution C; and adding the solution A into the solution B, then adding the solution C, continuously stirring, centrifuging, and freeze-drying. And drying, mixing and grinding with potassium bicarbonate, and then transferring into a tubular furnace for two-stage calcination to obtain the copper-modified lignin carbon nanospheres. The lignin nanospheres are prepared by adopting a solvent exchange method and are compounded with transition metal copper to realize high-added-value utilization of lignin, and the lignin nanospheres can be used for degrading water pollutants and water-based zinc ion batteries and have excellent degradation effect and electrochemical performance.

A semiconductor structure and a method for forming the same, the method comprising: forming a plurality of lower electrodes on a substrate, the lower electrodes comprising an annular wall and a petal-shaped wall extending in a direction perpendicular to the surface of the substrate, and the petal-shaped wall dividing the interior of the annular wall into a plurality of discrete first openings; forming a dielectric layer on the bottom and sidewalls of the first openings; forming an upper electrode in the first opening, the dielectric layer being located between the lower electrode and the upper electrode. The lower electrode of the present invention comprises an annular wall and a petal-shaped wall, so that the surface area of ​​the lower electrode is increased, and when a dielectric layer and a corresponding upper electrode are subsequently formed on the lower electrode, the surface area of ​​the dielectric layer and the upper electrode will also increase accordingly, thereby increasing the capacitance value of the formed semiconductor structure.

The invention discloses an electromagnetic band gap structure and a circuit board, and is applied to the field of high-frequency circuits. The signal connecting line is connected with the central part and extends along the direction far away from the central part; the metal wires are located on the periphery of the central part, the metal wires and the signal connecting wires are distributed at intervals, the two ends of each metal wire are connected with the central part, and a shielding groove is formed between each metal wire and the central part. According to the electromagnetic band gap structure provided by the invention, the cut-off frequency depth increase of noise is inhibited, the grounding bounce effect of the power supply layer can be effectively inhibited, and the effect of the grounding bounce effect on signal quality and electromagnetic radiation is further reduced; the shielding groove can prevent a signal interference source from diffusing, so that the integrity of signal transmission is ensured.

The invention provides a lithium-cobalt co-doped nickel oxide-based ceramic material and a preparation method thereof. The lithium-cobalt co-doped nickel oxide-based ceramic material comprises the following components: 40-60 parts of nickel oxide, 8-15 parts of lithium chloride, 5-10 parts of cobalt oxide, 1-5 parts of neodymium oxide, 3-8 parts of silicon dioxide, 3-8 parts of aluminum oxide, 0.5-3 parts of beryllium oxide, 1-5 parts of nano ceramic powder, 0.5-3 parts of manganese dioxide, 0.5-3 parts of vanadium oxide, 0.5-3 parts of lanthanum oxide and 0.5-3 parts of cerium oxide. By optimizing the proportion of all the components, the problems of uneven sintering, product performance fluctuation and the like possibly occurring in a traditional process are solved, and the production efficiency and the product consistency, dielectric constant, thermal stability, mechanical strength and other performance are improved.

The invention discloses a preparation method of a high-specific-capacitance supercapacitor electrode based on a carbon material, and the method comprises the steps: mixing the carbon material with a sodium alginate or carboxymethyl cellulose aqueous solution to obtain slurry; coating a substrate with the slurry to form a slurry film, immersing the slurry film and the substrate into a cross-linking agent for cross-linking, and then separating the hydrogel film from the substrate; and washing the hydrogel film with distilled water to remove the residual cross-linking agent, and then immersing the hydrogel film in electrolyte for electrochemical treatment to obtain the high-specific-capacitance supercapacitor electrode. According to the invention, the electrochemical stable potential window can be widened by 30% and the specific capacitance can be improved by about 100% under the condition that the existing commercial carbon material and electrolyte are utilized, and the preparation method is simple, is matched with the existing commercial production line and can realize large-scale preparation.

The present disclosure relates to a printed circuit board comprising: a glass layer; a plurality of blind cavities penetrating a part of the glass layer from the upper surface or the lower surface of the glass layer, respectively; the plurality of passive elements are respectively arranged in the plurality of blind cavities; and an insulating layer covering the glass layer and at least a portion of each of the plurality of passive elements, and disposed in at least a portion of each of the plurality of blind cavities. At least two blind cavities of the plurality of blind cavities have different depths.

The invention relates to the technical field of conductive paste, and particularly discloses lithium battery conductive paste and a preparation method thereof. The lithium battery conductive paste comprises the following components in parts by weight: 20-35 parts of graphite, 60-80 parts of carbon black, 1-2 parts of carbon nanotubes, 1-2 parts of graphene, 70-90 parts of a binder, 4-7 parts of polyvinylpyrrolidone, 15-20 parts of modified melamine resin and 650-800 parts of deionized water. When the prepared lithium battery conductive paste is used in a lithium battery, the lithium battery has relatively good rate capability and cycle performance.

The invention provides a highly amorphous carbon material prepared based on small organic molecule charring and application, and belongs to the technical field of material preparation, and the highly amorphous carbon material is prepared by the following steps: uniformly mixing small organic molecule powder and metal with strong reducibility according to a calculated mass ratio to obtain a mixture; based on an inert atmosphere, the mixture and grinding balls are loaded into a ball milling tank according to a set mass ratio, and then the ball milling tank is loaded into a ball mill for mechanical ball milling treatment; the carbon content of the highly amorphous carbon material derived based on the small organic molecules is greater than 90%, d002gt; the wavelength is 0.385 nm, and the wavelength is Lat; the wavelength is 4.0 nm, Lclt; 1.5 nm, ID / IGgt; 1.80, 1.80; the specific surface area is greater than 150m < 2 > g <-1 >. The problem that small organic molecules are difficult to directly convert into a carbon material is solved through a mechanical ball milling method and a mechanical force induced chemical reaction, and the obtained highly amorphous material has rich defect sites and has excellent capacitive performance when being used as an electrode material of a supercapacitor.

The invention discloses a water-in-salt redox hydrogel electrolyte and a preparation method and application thereof, the electrolyte is composed of a polymer matrix, a salt solute, a redox active substance and a solvent, the polymer matrix is one of polyvinyl alcohol or polyethylene glycol / polyacrylamide; the salt solute is zinc chloride; the redox active substance is one of ammonium ferrous sulfate, potassium bromide, zinc bromide, zinc iodide and potassium iodide; the solvent is water. The method has the remarkable effects that different redox active substances are added into different salt-in-water hydrogel electrolytes, so that the working voltage of the hydrogel electrolyte is effectively widened, the electrochemical performance of the hydrogel electrolyte is improved, and the hydrogel electrolyte has a high potential window and high electrochemical performance.

The present invention provides an electrode material for aluminum electrolytic capacitors, the electrode material being capable of exhibiting a high capacitance required for capacitors and having suppressed equivalent series resistance (ESR), and provides a method for producing the electrode material. The present invention provides an electrode material for aluminum electrolytic capacitors, comprising a sintered body of an aluminum alloy powder on at least one surface of a substrate, wherein the substrate is an aluminum foil substrate or an aluminum alloy foil substrate, and the aluminum alloy powder contains Fe in an amount of 2 to 499 mass ppm.

The invention belongs to the technical field of intelligent electrode materials, and particularly relates to a PEDOT / chitosan / TPEE composite skin-imitating flexible intelligent electrode film and a preparation method thereof. The film is prepared from the following raw materials: 90 to 100 parts of TPEE, 5 to 15 parts of PEDOT, 5 to 12 parts of chitosan, 0.3 to 3 parts of lubricant, 0.6 to 3 parts of foaming agent, 0.2 to 3 parts of antioxidant and 0.5 to 2 parts of pigment. The preparation method of the film comprises the following steps: mixing the TPEE, the PEDOT, the chitosan, the foaming agent, the lubricant, the antioxidant and the pigment to obtain a mixture, banburying, and extruding to form a film to obtain the PEDOT / chitosan / TPEE composite skin-imitating flexible intelligent electrode film. The intelligent electrode film can be well attached to the skin of a patient, has high conductivity, high capacitance and high code cloud transmission rate, and better realizes doctor-patient information exchange and interaction.

The utility model provides a radio frequency heating assembly and an aerosol generating device. The radio frequency heating assembly is used for the aerosol generating device. Wherein the radio frequency heating assembly comprises a radio frequency radiator with a resonant cavity, the radio frequency radiator is provided with a transmission joint, and the transmission joint is used for receiving a radio frequency signal; the resonant cavity comprises an inner area and a peripheral area surrounding the inner area, the inner area is provided with a containing cavity used for containing a heated medium, and the containing cavity is further provided with an opening communicating the containing cavity to the outside; the peripheral area is provided with at least three dielectric bodies which are evenly distributed, and cavities are formed in the dielectric bodies. The radio frequency heating assembly is provided with the dielectric body, and the dielectric body can provide a capacitance value for the resonant cavity, so that the resonant cavity can still keep a proper resonant frequency when the size of the device is reduced.

The invention discloses nano nickel molybdate and a preparation method and application thereof, and belongs to the technical field of capacitor materials. The preparation method of the nano nickel molybdate comprises the following steps: mixing a molybdenum source and a nickel source according to a molar ratio of Mo to Ni of 3: 8 to 9: 8 to obtain a mixture; wherein the molybdenum source is nano molybdenum oxide, and the nickel source comprises at least one of nickel oxide and nickel carbonate; the mixture is preheated for 60 min to 80 min under the condition that the temperature ranges from 150 DEG C to 180 DEG C; and the preheated mixture is subjected to a reaction for 100 min to 150 min under the condition of 450 DEG C to 490 DEG C, and the nano nickel molybdate is obtained. The preparation method is simple in process, convenient to operate, capable of achieving large-scale production and high in practicability. The nanometer nickel molybdate obtained by the method is in a nanometer level, and a super capacitor with high energy density can be further prepared.

This invention relates to the field of carbon material preparation technology, specifically disclosing a method for preparing porous carbon materials using a hierarchical synergistic activation method and its application. This method uses waste biomass from *Siraitia grosvenorii* pomace as raw material, sequentially undergoing low-temperature pre-activation, water washing, high-temperature synergistic activation, and isothermal acid washing to obtain porous carbon materials with ultra-high specific surface area. Scanning electron microscopy analysis and pore structure detection results show that the carbon material exhibits a hierarchical porous layered structure. Electrochemical tests show that the material possesses excellent capacitance performance, with a specific capacitance reaching 200-450 F / g at a current density of 0.5 A / g. When this porous carbon material is assembled into a symmetrical supercapacitor, after 10,000 cycles at a current density of 10 A / g, the specific capacitance retention rate remains above 90%, demonstrating good cycle stability and showing promising application prospects in the field of energy storage.

The present application relates to a kind of high-performance supercapacitor electrode materials and its preparation method and application.The high-performance supercapacitor electrode material is the heteroatom doped porous biochar electrode material obtained after the pre-carbonization of [Bmim]FeCl4 and waste biomass is mixed, then activated by KOH again.The present application uses the two-step method preparation technology of ion liquid pre-carbonization and KOH activation, combines pyrolysis modification and chemical activation, finally realizes the synergistic enhancement of pseudo-capacitance and double-layer capacitance.Compared with prior art, the present application dopes N / O / Fe and other heteroatoms in the ion liquid pre-carbonization stage and constructs pseudo-capacitance active site, constructs developed hierarchical porous structure in the KOH activation stage to greatly improve specific surface area, finally realizes the synergistic enhancement of pseudo-capacitance and double-layer capacitance, and prepares high-performance supercapacitor electrode material.

The invention discloses a semiconductor structure and a forming method thereof, and the semiconductor structure comprises a substrate which comprises a storage region; a plurality of memory gate grooves located in the memory region, wherein the memory gate grooves are separated from each other and are paired; the storage gate structures are at least partially located in the storage gate grooves, and each storage gate structure comprises floating gate dielectric layers located on the side walls and the bottom surfaces of the storage gate grooves, floating gates at least partially located on the surfaces of the floating gate dielectric layers in the storage gate grooves, control gate dielectric layers located on the surfaces of the floating gates and control gates located on the surfaces of the control gate dielectric layers; the first doped region is positioned in the storage region between the paired storage gate structures; the erasing gate dielectric layer is positioned on the surface of the first doped region; the erasing gate is located on the surface of the erasing gate dielectric layer, and the bottom surface of the erasing gate is lower than or flush with the top surface of the floating gate; and the second doped regions are positioned in the storage regions on the two sides of the paired storage gate structures. According to the semiconductor structure and the forming method thereof, the writing efficiency and the erasing efficiency of a memory are improved.

The invention relates to the technical field of preparation of active carbon materials, in particular to a method for preparing a biomass porous carbon material through a coupling activation method and application of the biomass porous carbon material. The preparation method comprises the following steps: by taking waste biomass such as cassava peel as a raw material, performing fermentation, acid leaching activation, low-temperature carbonization, alkali activation, ultrasonic acid pickling and high-temperature impurity removal to obtain the biomass-derived porous carbon material, and performing electron microscope analysis and pore detection on the biomass-derived porous carbon material prepared by the steps. The biomass derived porous activated carbon material is of a porous layered structure and has abundant micropores and mesopores; according to the present invention, the electrochemical test experiment detection results show that the biomass derived porous carbon material has excellent capacitance performance, and when the current density is 0.5 A / g, the specific capacity value range is 200-400 F / g; the material also has good stability, the biomass derived porous carbon material is assembled into a symmetric supercapacitor, and after 10000 circles of stability tests, the retention rate of the specific capacitance of the symmetric supercapacitor can be maintained to be 90% or above.

The invention discloses a novel structure in a silicon-based capacitor and a manufacturing method. The novel structure comprises a deep groove entering a substrate from the surface of the substrate; and the side wall of the deep groove is provided with a zigzag surface appearance along the depth direction. According to the invention, the surface area of the deep trench can be increased, so that the capacitance value and density in unit area are improved, and the stability of the device performance is ensured at the same time.