36results about How to "Lower transmission impedance" patented technology

The invention relates to the technical field of preparation of a surface micro-nano functional structure, in particular to a method for preparing a TiO2 multi-scale micro-nano composite structure on atitanium substrate. Firstly, a ultrafast laser is used for etching the surface of a pure Ti sheet in deionized water or absolute ethanol to prepare a first-level micro-structure, and ultrasonic cleaning is performed; then the surface of the laser-etched Ti sheet is subjected to gold film plating by magnetron sputtering; and finally, the Ti sheet after gold film plating is placed in a muffle furnace for heat treatment, a second-level nanostructure is prepared on the surface of the micro-structure to obtain the crystal type TiO2 multi-scale composite micro-nano structure.

The invention relates to the field of positive electrode materials, and provides a high-nickel positive electrode material, a preparation method thereof, and a lithium ion secondary battery. The high-nickel positive electrode material comprises secondary particles, wherein the secondary particles comprise a plurality of primary particles, the primary particles comprise an active substance, the general chemical formula of the active substance is LibNixCoyMzNwO2, 0.95 <=b <=1.05, 0.8 <=x < 1, 0<y+z<=0.2, x+y+z=1, 0.0001<=w<=0.003, M is selected from at least one of Mn and Al, and N is a metal; acoating layer which comprises a first coating layer and a second coating layer, wherein the first coating layer is formed on the surface of the primary particle, the second coating layer is formed onthe surface of the secondary particle, and each of the first coating layer and the second coating layer contains a phosphoric acid compound. According to the high-nickel positive electrode material,the preparation method thereof and the lithium ion secondary battery, the cost is low, large-scale production can be realized, and the rate capability and the cycling stability of the lithium batterycan be effectively improved.

The invention discloses a difunctional cobalt diselenide material as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) jointly performingthe hydrothermal reaction for a mixed aqueous solution of soluble cobalt salt, soluble ammonium salt and a carbon-containing precipitant and a conducting substrate, and obtaining a cobalt element-containing precursor growing on the conducting substrate; (2) jointly performing the hydrothermal selenylation reaction for a mixed solution of selenium powder, alkali, a reduction agent and organic solvent and the cobalt element-containing precursor in step (1), after the reaction is ended, drying, and obtaining the cobalt diselenide material. By combining the oxidation of hydrazine hydrate and the specific application of a hydrogen evolution catalyst, the preparation of the cobalt diselenide material is re-designed; and specifically by designing the overall process of the preparation method andselecting and optimizing parameter conditions adopted in each step and by optimally controlling the specific composition and microscopic morphology of the cobalt diselenide material, the cobalt diselenide bifunctional catalyst with greatly-improved catalytic activity can be correspondingly obtained.

The invention discloses a three-channel microwave rotary joint which comprises a single-waveguide rotor, a double-waveguide rotor, a double-waveguide stator, a single-waveguide stator, a first bearing, a second bearing, a first connection arm, a second connection arm, a first inner conductor, a second inner conductor and a third inner conductor. According to the three-channel microwave rotary joint, the axial distance is short, the signal transmission loss is reduced, the problem of multi-channel Ka frequency band signal transmission is solved, the transmit-receive insulation degree is good, double-bearing design is adopted, coaxiality is guaranteed through precise machining and assembling, electrical performance fluctuation generated in the rotating process is greatly lowered, and the reliability of spacecraft moving components is improved.

The invention provides a solid-state battery, a battery module, a battery pack and related devices thereof. A sulfide electrolyte layer and at least one polymer electrolyte layer are arranged on the surface of the sulfide electrolyte layer, and the solid electrolyte meets the following conditions: the thickness of the sulfide electrolyte layer is greater than or equal to the thickness of the polymer electrolyte layer on one side and greater than or equal to 84.2-80.2*w. According to the polymer electrolyte layer with the proper thickness, the interface infiltration effect between the current sulfide electrolyte layer and the electrode can be improved; and the overall energy density of the battery cannot be seriously reduced, the application defects of sulfide electrolyte in the solid-statebattery are overcome to a great extent, and the cycle performance and the safety performance of the solid-state battery are improved.

The invention provides a method for preparing a polymer electrode material for a supercapacitor. According to the method disclosed by the invention, phenylamine or pyrrole monomer is taken as a raw material, and the sphere-like polymer electrode material with uniform particle size distribution is obtained by adding a nanometer carbon material in a polymer preparation process and controlling polymerization conditions of macromolecules so as to subjecting the polymer electrode material to in-situ polymerization and uniform coating on the surface of the nanometer carbon material; and the supercapacitor manufactured by using the polymer electrode material has the advantages of high specific capacitance, small internal resistance and good cycle performance.

The invention provides a solid electrolyte and a preparation method thereof and a lithium ion battery. The solid electrolyte comprises the following components in percentage by mass: 0.1-80% of an inorganic electrolyte tube body and the balance of a polymer electrolyte. The solid electrolyte provided by the invention has more excellent lithium ion conductivity and mechanical strength.

The invention provides a positive pole piece for a solid-state battery, a preparation method and application thereof. The preparation method comprises the following steps of: (1) atomizing a solid electrolyte solution, coating the surface of a positive active material with the atomized solid electrolyte solution, and then performing drying o obtain the positive active material coated with a solid electrolyte layer; and (2) carrying out primary mixing on the positive active material coated with the solid electrolyte layer and a conductive agent, then adding a binder, carrying out secondary mixing and rolling under the action of shear force to obtain a positive electrode layer, and then compounding the positive electrode layer with a current collector to obtain the positive pole piece for the solid-state battery. According to the invention, the surface of the positive active material is coated with the solid electrolyte solution, and then the positive pole piece is prepared by adopting a dry method, so that the contact between the solid electrolyte and an unstable solvent is avoided, the conductivity of the electrolyte is improved, and the rate capability and the cycle performance of the battery are improved.

One implementation enables tuning a multi-band antenna such that two or more of the bands are tuned independently of one another, whereby tuning one band is decoupled from tuning another band. Some implementations include a multi-band tuning arrangement having first and second tunable two-terminal circuits. The first tunable two-terminal circuit has a low transmission impedance associated with a first frequency band, and a high transmission impedance associated with a second frequency band, the first tunable two-terminal circuit including a first control element to selectively adjust a first resonant frequency associated with the first frequency band. The second tunable two-terminal circuit having a high transmission impedance associated with the first frequency band, and a low transmission impedance associated with the second frequency band, the second tunable circuit including a second control element provided to adjust a second resonant frequency associated with the second frequency band.

The invention discloses a two-dimensional display and a chip joint sheet thereof. The two-dimensional display comprises a display panel, a flexible circuit board, a first source drive chip, a second source drive chip and a control circuit board. A plurality of first lead wires and second lead wires are arranged in the peripherical circuit area of a display panel, are respectively extended from the lower part of the flexible circuit board to two opposite sides of the display panel and are electrically connected with the flexible circuit board. The first source drive chip is electrically connected with the flexible circuit board through a part of electric property of the first lead wires. The second source drive chip is connected electrically connected with the flexible circuit board through the second lead wires. The chip joint sheet is positioned under the first source drive chip or the second source drive chip; a first dielectric layer of the joint sheet is provided with a plurality of first contact openings; a second dielectric layer is provided with a plurality of second contact openings and third contact openings which are alternately arranged; and the second contact openings are corresponding to the first contact openings.

The invention discloses an electrode material with a crystalline-amorphous concerted catalytic interface. The electrode material comprises crystalline-state Ni (OH) 2 and amorphous-state NiMoS, wherein the amorphous-state NiMoS is obtained by converting Ni (OH) 2, and the concerted catalytic interface is formed between the crystalline-state Ni (OH) 2 and the amorphous-state NiMoS. The invention further discloses a preparation method of the electrode material with the crystalline-amorphous concerted catalytic interface. The preparation method is specifically implemented according to the steps of 1, preparing an in-situ growth crystalline Ni (OH) 2 nanosheet precursor on a titanium mesh; and 2, carrying out molybdenum vulcanization treatment on the crystalline Ni (OH) 2 nanosheet precursor obtained in the step 1 to prepare the crystalline Ni (OH) 2 and amorphous NiMoS electrode material with the concerted catalytic interface.

The invention discloses a preparation method of a miniature supercapacitor capable of being used for kHZ alternating current linear filtering. By the method, the problems that a traditional aluminum electrolytic capacitor is large in size and small in characteristic frequency are mainly solved. According to the implementation scheme, the method comprises the following steps of 1) making a patterned photoresist-target substrate on a target substrate through photoetching; 2) depositing a metal current collector on the patterned substrate by using an electron beam evaporation device to form a metal current collector / photoresist-target substrate structure, and cleaning the metal current collector / photoresist-target substrate structure by using a plasma oxygen device; 3) manufacturing an electrode material coating on the surface of the cleaned metal current collector and removing the photoresist to form an electrode material-metal current collector-target substrate structure; and 4) dispensing an electrolyte on the surface of an electrode material, leading out positive and negative electrode leads, and packaging with PDMS to complete the manufacturing of the miniature supercapacitor device. The manufactured device is small in size and electrode size, the characteristic frequency can reach kHz or above, and the preparation method can be used for manufacturing a miniature rectifying circuit.

The invention relates to preparation of a surface micro-nano functional structure and in particular relates to a method for preparing TiO2 nano-wires loaded with gold particles at top ends. The methodis characterized by comprising the following steps: firstly, putting Ti sheets into absolute ethyl alcohol and carrying out ultrasonic washing; then uniformly spraying gold on the surfaces of the washed Ti sheets through magnetron sputtering; then putting the Ti sheets sprayed with the gold into a muffle furnace and carrying out heat treatment; producing the crystallization type TiO2 nano-wires loaded with the gold particles at the top ends on the surfaces of the Ti sheets sprayed with the gold. The preparation method provided by the invention has the advantages of simple technology, controllable size, high light absorption rate, stable structure, capability of realizing large-scale production and the like; the prepared TiO2 nano-wires can be applied to fields including photocatalysis, surface-enhanced Raman scattering and surface-enhanced fluorescence, bacterium resistance and pollution prevention and, photoelectric conversion and the like.

A medium-voltage variable-frequency power cable, including a cable core, which is sequentially covered with an inner liner, a total shielding layer, and a low-smoke and halogen-free outer sheath layer from the inside to the outside; the cable core is symmetrically formed by three insulated wire cores. Formation; the insulated wire core is composed of a conductor layer, a conductor shielding layer, a cross-linked polyethylene insulating layer, an insulating shielding layer and a phase-separated shielding layer from the inside to the outside, and the thickness of the cross-linked polyethylene insulating layer is 5.0-5.5 mm; The phase shielding layer and the total shielding layer are copper wires loosely wound and copper tape wrapped, and the winding directions of copper wire and copper tape are opposite. The medium-voltage variable-frequency power cable provided by the invention solves the problem of high-power transmission of medium-voltage frequency converters. It solves the problem of low insulation safety factor and easy breakdown for cables. It has good insulation performance and can cope with the impact of high-frequency pulse reflection superimposed voltage. It has good anti-interference performance and is suitable for various laying environments.

The invention provides a major loop electric power cable for a medium-voltage frequency converter. The cable comprises three power conductors, three control conductors and a central gap filler, wherein the cross section of the central gap filler is round, a cabled core is formed by stranding of the three power conductors and the three control conductors around the central gap filler, the control conductors are arranged between any two adjacent power conductors, the cabled core is sequentially coated with a third metal shielding layer, an electrostatic shielding layer, a water-blocking tape covering layer, a tin-plated steel wire winding armor layer and a polyolefin outer sheath, and water-blocking ropes with triangular cross sections are placed in gaps between the power conductors, the control conductors and the third metal shielding layer. According to the major loop electric power cable for the medium-voltage frequency converter, effective capacitance is low, transfer impedance is low, good electromagnetic compatibility is achievable, the tensile strength and water resistance of the cable are improved, and the service life of the cable is prolonged.

The invention provides a preparation method of a metal lithium composite material. The method comprises the following steps: S1) heating and mixing a lithium-philic oxide and pure lithium, cooling, and rolling to obtain a metal lithium modified foil; soaking a three-dimensional conductive material in an organic solution containing metal salt to obtain a treated three-dimensional conductive material; and S2) mechanically compounding the metal lithium modified foil with the treated three-dimensional conductive material, and carrying out heat treatment in a protective atmosphere to obtain the metal lithium composite material. Compared with the prior art, the lithium-philic material capable of improving metal lithium negative electrode circulation is mixed into pure lithium in advance, the prepared metal lithium composite material can be directly used as a lithium battery negative electrode, the use efficiency of metal lithium is improved, structural support is provided, pulverization of metal lithium in a circulation process is prevented, and circulation performance of the battery is improved; and an interface lithium ion transmission impedance can be reduced, and battery polarizationis effectively decreased.

The invention relates to a high-power formable multi-layer composite bus bar for space navigation. The bus bar comprises a confluence positive bus 1, cavity insulation paste 2, a bus positive bus binding post 3, a cavity insulation assembly 4, a bus negative bus binding post 5, a confluence negative bus 6, an outer insulation protection cover 7, a bus negative bus installation groove 8, an insulation installation sleeve 9, a bus bar protection insulation plate 10 and a terminal insulation assembly 11. The confluence positive bus 1 is connected with a high-voltage end, and is on the intermediate position, the confluence negative bus 6 is connected with a low-voltage end (namely a direct-current zero-potential end), is U-shaped and surrounds three sides of the confluence positive bus 1, so that an electric field line generated after the high-voltage end and the low-voltage end are electrified is limited in the U shape, a good electromagnetic compatibility effect is ensured, and comparedwith the condition that a silver-plated copper wire is adopted in the same power cable assembly, about 20% of weight and volume can be saved under the condition of the same transmission horizontal sectional area. The heat dissipation area is large, the heat dissipation capacity is high, the environment temperature rise is low, and the transmission impedance can be reduced.

Provided is a power supply cable for low-voltage frequency conversion. The cable comprises a cable core, a lining layer, a shielding layer, a fireproof isolation layer, a wrapping layer and a sheath layer which are arranged in sequence, and the cable core comprises three first wire cores and three second wire cores. The three first wire cores are distributed in the cable core along the circumference; the three second wire cores are distributed on the periphery of the three first wire cores along the circumference, the diameter of each first wire core is larger than that of each second wire core, the fireproof isolation layer is arranged between the shielding layer and the sheath layer, the wrapping layer is arranged outside the fireproof isolation layer, and the fireproof isolation layer comprises a polygonal PE isolation sleeve and a fireproof mud layer which wrap the shielding layer. The power supply cable can bear pulse voltage during high-speed frequent frequency conversion, and plays a role in protecting a variable-frequency electric appliance; the fireproof mud layer is added on the basis of the fireproof cable, so that the bending radius of the cable is not increased when the cable encounters a fire, the operation and laying of the cable are more convenient, the operation time of the cable is longer when the fire occurs, the destructive power influenced by the fire is smaller, and the operation of the cable is more stable.

The invention provides a major loop electric power cable for a medium-voltage frequency converter. The cable comprises three power conductors, three control conductors and a central gap filler, wherein the cross section of the central gap filler is round, a cabled core is formed by stranding of the three power conductors and the three control conductors around the central gap filler, the control conductors are arranged between any two adjacent power conductors, the cabled core is sequentially coated with a third metal shielding layer, an electrostatic shielding layer, a water-blocking tape covering layer, a tin-plated steel wire winding armor layer and a polyolefin outer sheath, and water-blocking ropes with triangular cross sections are placed in gaps between the power conductors, the control conductors and the third metal shielding layer. According to the major loop electric power cable for the medium-voltage frequency converter, effective capacitance is low, transfer impedance is low, good electromagnetic compatibility is achievable, the tensile strength and water resistance of the cable are improved, and the service life of the cable is prolonged.

A plane display and its chip bonding pads. The plane display includes a display panel, a flexible circuit board, a first source driver chip, a second source driver chip and a control circuit board. There are a plurality of first wires and second wires in the peripheral circuit area of ​​the display panel, the first wires and the second wires respectively extend from the bottom of the flexible circuit board to the two opposite sides of the display panel, and are connected with the flexible circuit board electrical connection. The first source driver chip is electrically connected to the flexible circuit board through a part of the first wire. The second source driver chip is electrically connected to the flexible circuit board through the second wire. The chip bonding pad is located under the first source driver chip or the second source driver chip, the first dielectric layer has a plurality of first contact openings, and the second dielectric layer has a plurality of alternately arranged second contact openings and the third contact opening, and the second contact opening corresponds to the first contact opening.

The invention discloses a solid-state electrolyte and a solid-state battery containing the same. According to the solid-state electrolyte and the solid-state battery containing the same, a novel polymer material (crown ether organic covalent skeleton structure material (COFs)) is synthesized as a modification layer to modify two sides of an inorganic solid-state electrolyte and / or an organic solid-state electrolyte in situ; and a final solid-state battery structure is a positive plate-polymer-inorganic solid electrolyte sandwich-like structure and / or an organic solid electrolyte-polymer-negative plate sandwich-like structure. The modification method provided by the invention can effectively improve the interface performance between a solid electrolyte and an electrode in situ, so that a prepared polymer solid electrolyte coating can significantly increase the transmission channel of lithium ions on a positive electrode / inorganic ceramic chip / negative electrode interface, and therefore, the transmission impedance of a solid-solid interface is reduced, the inorganic solid electrolyte and / or organic solid electrolyte are / is protected from being reduced by the metal lithium negative electrode, and the electrochemical performance of the solid-state battery is improved.

One implementation is capable of tuning a multi-band antenna such that two or more bands are tuned independently of each other, thereby decoupling tuning one band from tuning the other. Some implementations include a multi-band tuning device having a first tunable diac and a second tunable diac. The first tunable two-terminal circuit has a low transfer impedance associated with the first frequency band and a high transfer impedance associated with the second frequency band, the first tunable two-terminal circuit includes a first control element to selectively adjust the connection with the first frequency band. The frequency band is associated with the first resonant frequency. The second tunable two-terminal circuit has a high transfer impedance associated with the first frequency band and a low transfer impedance associated with the second frequency band, the second tunable circuit includes a second control element arranged to adjust the The second resonant frequency of the coupler.

The invention discloses a bifunctional cobalt diselenide material and its preparation and application. The preparation method includes the following steps: (1) Mixing a mixed aqueous solution of soluble cobalt salt, soluble ammonium salt and carbon-containing precipitant with a conductive substrate Perform a hydrothermal reaction together to obtain a precursor containing cobalt element grown on a conductive substrate; (2) conduct a mixed solution of selenium powder, alkali, reducing agent and organic solvent together with the precursor containing cobalt element in step (1) Hydrothermal selenization reaction, drying after the reaction is completed, to obtain cobalt diselenide material. The present invention specifically redesigns the preparation of the cobalt diselenide material by combining the specific applications of hydrazine hydrate oxidation and hydrogen evolution catalysts, and specifically selects and optimizes the overall flow process design of the preparation method and the parameter conditions used in each step. , by optimizing and controlling the specific composition and micromorphology of cobalt diselenide materials, a cobalt diselenide bifunctional catalyst with greatly improved catalytic activity can be obtained.

The invention discloses a solid-state electrolyte capable of in-situ polymerization and an all-solid-state battery containing the solid-state electrolyte, and the solid-state battery with a sandwich-like structure is obtained by taking PNCs as a modification layer for in-situ modification of an inorganic solid-state electrolyte and / or an organic solid-state electrolyte. The modification method provided by the invention can effectively improve the interface performance between the solid electrolyte and the electrode in situ, and the prepared polymer solid electrolyte coating has higher ionic conductivity and excellent bonding performance. Therefore, the polymer solid electrolyte can be used as the buffer layer while utilizing the excellent performance of the inorganic solid electrolyte and / or the organic solid electrolyte, and thus high-safety, high-reliability and long-life energy storage can be fundamentally realized. And the modification method can significantly increase transmission channels of lithium ions so as to reduce the transmission impedance of a solid-solid interface and protect the solid electrolyte from being reduced by the metal lithium negative electrode, thereby improving the electrochemical performance of the solid-state battery.

The invention provides an optical scanning module and a manufacturing method thereof. The optical scanning module comprises an optical sensor, an electronic component, a heat sink substrate, a heat conduction support and an optical lens, wherein the heat sink substrate, the heat conduction support and the optical lens are connected in order from bottom to top; a groove is upwards formed in the lower plane of the heat conduction support; the heat sink substrate is also provided with a light-transmitting groove; the groove is communicated with a light transmitting groove; an optical sensor is welded to the upper plane of the groove in an inverted mode through a solder ball; the optical sensor is also in contact connection with the heat sink substrate through a heat-conducting medium layer; the electronic component is located in the orthographic projection area of the groove and is staggered with the optical sensor; a bonding pad of the heat conduction support is in circuit connection with a bonding pad of the heat sink substrate; and light passing through the optical lens penetrates through the light transmitting groove and can irradiate the optical sensor. The heat dissipation performance and the reaction speed can be improved.

The invention provides a low-smoke halogen-free ultraviolet-proof variable frequency cable, wherein a cable core is formed with main wire cores, protective wire cores located in the gapes of the main wire cores and PP (Polypropylene) ropes arranged in rest gaps, and orderly covered with a first wrapping layer, a copper braid shielding layer, a second wrapping layer, a copper strip wrapped shielding layer, a third wrapping layer and a low-smoke halogen-free outer sheath layer. Due to the adoption of two layers of shielding structures, the low-smoke halogen-free ultraviolet-proof variable frequency cable is low in transmission impedance and good in outside electromagnetic interference elimination effect, in combination with the design of the second wrapping layer and the third wrapping layer, the noise of a variable frequency motor can be reduced, due to the design of a category soft conductor structure, the cable is enabled to have good bending property, and due to the adoption of the ratproof, anti-ant and ultraviolet-proof low-smoke halogen-free polyolefin sheath, the cable is enabled to have strong environmental resisting capability; besides, the 3+3 cable core structure with three main wire cores and three protective wire cores is stable, compact, and high in resistance to impact of transformer generated impulse voltage.

The invention discloses a three-channel microwave rotary joint which comprises a single-waveguide rotor, a double-waveguide rotor, a double-waveguide stator, a single-waveguide stator, a first bearing, a second bearing, a first connection arm, a second connection arm, a first inner conductor, a second inner conductor and a third inner conductor. According to the three-channel microwave rotary joint, the axial distance is short, the signal transmission loss is reduced, the problem of multi-channel Ka frequency band signal transmission is solved, the transmit-receive insulation degree is good, double-bearing design is adopted, coaxiality is guaranteed through precise machining and assembling, electrical performance fluctuation generated in the rotating process is greatly lowered, and the reliability of spacecraft moving components is improved.

The present invention provides a solid-state battery, a battery module, a battery pack and related devices, wherein the sulfide electrolyte layer and at least one polymer electrolyte layer disposed on the surface of the sulfide electrolyte layer, and the solid electrolyte satisfies the following conditions: The thickness of the sulfide electrolyte layer is greater than or equal to the thickness of the polymer electrolyte layer on one side is greater than or equal to 84.2−80.2×w. The polymer electrolyte layer with an appropriate thickness of the present invention can not only improve the interfacial infiltration effect between the current sulfide electrolyte layer and the electrode, but also not seriously reduce the overall energy density of the battery, and greatly overcome the problem of the sulfide electrolyte in the solid state. The application defects in the battery improve the cycle performance and safety performance of the solid-state battery.

Provided are a positive electrode, an electrochemical device, and an electronic apparatus, the positive electrode including a positive electrode active material layer, the positive electrode active material layer including a positive electrode active material including a first active material and a second active material, and at least two types of conductive agents, the difference between the particle diameter D50 of the first active material and the particle diameter D50 of the second active material is 3 [mu] m to 15 [mu] m. The positive electrode has high lithium ion transmission efficiency, and the electrochemical device prepared from the positive electrode has high capacity retention rate at low temperature (0 DEG C and-20 DEG C).