1664results about "Electrolytic capacitors" patented technology

Provided is a power storage device comprising: an electrode body that includes electrodes; a current collector that extends from the electrodes; an electrode terminal that is electrically connected to the electrode body via the current collector; an exterior film that is wrapped around the electrode body in such a manner as to have an opening; and a lid body that is disposed in the opening, wherein the lid body covers at least a part of the current collector.

The invention provides an embedded structure energy storage integrated composite material and a preparation method thereof, and belongs to the technical field of composite materials and electric energy storage. A sandwich structure is adopted, an energy storage unit is embedded in an insulation honeycomb / grid core material, and high-strength fiber composite material panels are arranged on the upper side and the lower side of the insulation honeycomb / grid core material. In the aspect of a material system, the panel has both mechanical strength and electrical insulation property; in structural design, gradient thickness and multi-cavity layout are introduced to improve the multi-direction load bearing capacity. Automatic switching, energy management and fault diagnosis among the energy storage units are realized by a flexible circuit and an intelligent chip which are internally integrated; meanwhile, a sensing network is embedded to monitor structural strain, vibration and battery state in real time, and a structural health monitoring function is provided. The obtained composite material has the characteristics of high structural strength, high energy storage efficiency and high safety intelligent degree, can be widely applied to the fields of aerospace, automobiles and the like, realizes the integrated design of the structure and energy storage, and achieves the purposes of reducing weight and improving functions.

The invention discloses a preparation method and application of three-dimensional intercalation multidirectional conductive MXene-based aerogel, and relates to the technical field of advanced electrochemical energy storage materials and devices. According to the MXene / conductive polymer and nanofiber composite aerogel developed by the invention, the two-dimensional conductive material, the pseudocapacitance polymer and the high-performance nanofiber are integrated in a three-in-one manner, so that collaborative optimization of conductivity, the number of active sites and structural stability is realized, and inherent defects of a single-component material are fundamentally avoided; and a universal solution is provided for solving the industrial problem of unbalanced performance of the electrode material.

The invention belongs to the technical field of low-pressure corrosion foils, and particularly relates to a post-processing method of a low-pressure corrosion foil. The post-treatment method comprises the following steps: carrying out the following operations on the aluminum foil subjected to corrosion, acid pickling and first water washing: S1, removing an aluminum hydroxide layer blocking a corrosion hole; and S2, soaking in a mixed solution of acid and water with the pH value of 5-6.5 for 2-4 minutes, washing with water for the second time, and then carrying out chip burning treatment. According to the post-treatment method disclosed by the invention, at least 80 days of continuous treatment can be realized without causing blockage of reaction tank equipment, and the prepared low-pressure corrosion foil has relatively high specific volume.

The invention discloses a process for improving anodic oxidation consistency of an anode foil for an aluminum electrolytic capacitor, and relates to the technical field of capacitor manufacturing, and the process comprises the steps of multi-stage washing, etching, feeding, multi-stage formation, intermediate treatment, first post-treatment, roasting, second post-treatment, stability treatment, drying, rolling, inspection and packaging. Wherein the multi-stage formation adopts three-stage oxidation of low-temperature and low-current, medium-temperature and medium-current and low-temperature and high-current, so that an oxidation film forms a base layer, a growth layer and a high-density protection layer which are uniformly overlapped layer by layer, and the consistency and compactness of the oxidation film are synergistically improved through dynamic water washing, air drying and temperature field and fluid field regulation and control technologies; the oxide film is repaired through first post-treatment, the pore size of the oxide film is reduced, and the compactness of the oxide film is improved; and high-temperature roasting is combined, and a second post-treatment step is carried out, so that the oxidation film forms an aluminum oxide crystal structure which is stable, high in hardness and compact in structure, and the water resistance and reliability of the finished anode foil are enhanced.

The invention discloses an aluminum electrolytic capacitor powder stacking sintered foil and a preparation method thereof, and belongs to the technical field of aluminum electrolytic capacitors. The preparation method of the aluminum electrolytic capacitor powder stacking sintered foil comprises the steps that aluminum powder and a dielectric substance precursor serve as raw materials, a dielectric substance is deposited on the surface of the aluminum powder through a chemical vapor deposition method, and the aluminum powder wrapped by the dielectric substance is obtained; the dielectric constant of the dielectric substance is greater than that of aluminum oxide; the method comprises the following steps: uniformly mixing aluminum powder wrapped by a dielectric substance, a binder and a solvent, coating an aluminum foil substrate with the mixture, drying, degreasing at 350-550 DEG C in an oxygen-containing atmosphere, sintering at 600-670 DEG C in an oxygen-free state, and energizing after sintering to obtain the aluminum electrolytic capacitor powder stacked sintered foil. According to the aluminum electrolytic capacitor powder stacking sintering foil prepared by the method, the aluminum electrolytic capacitor powder stacking sintering anode foil per unit area has excellent electrostatic capacity.

A heating circuit for an energy storage device having a core with an electrolyte, inputs, a capacitance across the electrolyte and the core, and internal surface capacitance between inputs which can store electric field energy between internal electrodes of the energy storage device that are coupled to the inputs, including: a power supply coupled to an input, the power supply provides positive and negative input currents to one input, the positive input current flows in to the input and the negative input current flows out of another input; and a controller that switches between the positive and negative input currents to provide the positive input current and the negative input current to the one of the inputs at a frequency sufficient to effectively short the internal surface capacitance of the energy storage device to generate heat and raise a temperature of the electrolyte.

The invention provides a preparation method of an aluminum electrolytic capacitor anode foil, and relates to the technical field of capacitors. The method comprises the following steps: preparing aluminum paste; providing an aluminum foil substrate, coating the surface of the aluminum foil substrate with aluminum paste, and performing drying treatment to form an aluminum foil blank; washing the aluminum foil green body with water, and drying to obtain a porous aluminum foil green body; performing heat treatment on the porous aluminum foil blank; coating the surface of the porous aluminum foil green body subjected to heat treatment with a thin film solution, and performing drying treatment to form a protective film layer on the surface of the porous aluminum foil green body; rolling the porous aluminum foil blank with the protective film layer by using a rolling mill in a skew rolling manner to obtain an initial anode foil; and sintering the initial anode foil, and removing the protective film layer to form a sintered foil. According to the preparation method, the anti-bending performance of the anode foil can be improved.

A method for producing a conductive polymer dispersion, the method comprising a step for adding an electric conductivity improving agent to a dispersion that contains a conjugated conductive polymer and a polyanion and dispersing the same, wherein the step is performed at a liquid temperature of 30°C or higher.

The invention belongs to the technical field of electrode foil formation treatment, and particularly relates to an electrode foil and a preparation method thereof and an aluminum electrolytic capacitor, the preparation method of the electrode foil comprises the steps of performing multi-stage formation treatment on a corrosion foil, the number of stages of the formation treatment is at least two, and the formation treatment at least comprises first-stage formation and second-stage formation, first heat treatment is carried out after the second-stage formation; a formation liquid used in the second-stage formation is a mixed solution containing adipate and monopotassium phosphate. According to the preparation method provided by the invention, the formation liquid used in secondary formation is the mixed solution containing adipate and monopotassium phosphate, the limitation of traditional single formation liquid is broken through, and synchronous optimization of the structure, hydration resistance and electrochemical performance of the aluminum oxide film is realized through multi-stage formation, mixed solution synergy and the synergistic effect of formation and heat treatment; meanwhile, production cost is reduced, and environmental load is relieved.

The invention relates to the technical field of hydraulic impregnation machines, and discloses a full-automatic hydraulic impregnation machine which comprises a machine body, an impregnation tank is fixedly mounted on the inner side of the machine body, a hollow tank is arranged in the impregnation tank, a rotating assembly is fixedly connected to the outer side of the hollow tank, and a cover plate is arranged on the inner side of the hollow tank. An impregnation tank is arranged in the machine body, a hydraulic system is arranged in the impregnation tank, a liquid storage tank is fixedly connected to the inner side of the machine body, a vacuum pump is arranged between the impregnation tank and the liquid storage tank, a sealing cover is movably installed on the top face of the impregnation tank, a reflux pump is arranged on the inner side of the machine body, and two suction pipes are arranged on one side of the vacuum pump. Through the arrangement of the rotating assembly, the hollow tank and the capacitor in the hollow tank can be driven to deflect, the electrolyte can make full contact with all parts of the capacitor core body by rotating the capacitor, the electrolyte can better permeate into the winding structure and fill small gaps and pores in the winding structure, and impregnation is more uniform and thorough.

The invention relates to the technical field of aluminum foil winding, and specifically to an aluminum foil winding device for electrolytic capacitors and a method thereof, comprising a winding base, a winding driver is fixedly installed on one end of the upper surface of the winding base, a main winding roller is rotatably installed on one end of the winding driver, a supporting shaft frame matching the main winding roller is rotatably connected to one end of the upper surface of the winding base, a top cover is fixedly connected to one end of the winding driver, a film-driving assembly is rotatably installed between the winding driver and the mounting frame, and the film-driving assembly comprises a rotating drum rotatably installed between the winding driver and the mounting frame, and a plurality of distribution films obliquely and symmetrically connected to the outer surface of the rotating drum, which is beneficial to multiple compaction of the winding material when the aluminum foil is wound, improves the compactness, cooperates with impurity cleaning, prevents bubbles and wrinkles from appearing during winding, and improves the overall forming quality of the winding.

The invention relates to the technical field of capacitor electrode materials, in particular to a biomass derived porous carbon and layered double hydroxide (LDH) composite material and a preparation method and application thereof. The invention provides a preparation method of a biomass-derived porous carbon and LDH composite material, which is characterized by comprising the following steps: mixing biomass-derived porous carbon, nickel salt, cobalt salt, ethylene glycol, hexamethylenetetramine and water, and carrying out hydrothermal reaction to obtain the biomass-derived porous carbon and LDH composite material, the pore structure of the biomass derived porous carbon comprises micropores, mesopores and macropores. The biomass derived porous carbon and LDH composite material has good specific capacitance, energy density and cycling stability, and can be used as a high-performance supercapacitor electrode material.

The present disclosure relates to a photovoltaic device comprising a first contact layer (120) having a first thickness, a first charge transport layer (CTL, CTL ') having a second thickness positioned over a surface of the first contact layer, a semiconductor device (100) includes a first CTL (120) having a first thickness, an absorber layer (140) having a third thickness positioned over a surface of the first CTL, a second CTL (150) having a fourth thickness positioned over a surface of the absorber layer, a second contact layer (170) having a fifth thickness positioned over a surface of the second CTL, a barrier layer (180) having a sixth thickness, an encapsulation layer (190), and a first scribe line (P3) defined by at least one surface.

A wiring module is directed to a wiring module configured to be attached to a plurality of power storage elements having electrode terminals. The wiring module includes: a plurality of busbar units: and wires connected to the busbar units. Each of the busbar units includes: a busbar connected to the electrode terminals; a circuit board; and a fixing means configured to fix the circuit board to the busbar. A conductive path is routed on the circuit board, and the conductive path includes: a connection land electrically connected to the busbar; and a wire land soldered to the corresponding wire. The busbar includes a crimping part that fixes the wire, and the wire is interposed between the crimping part and the circuit board.

The invention discloses a novel corrosion process applying a plasma cleaning technology and a four-stage attenuation current hole-forming technology, and belongs to the technical field of corrosion foil manufacturing. Aiming at non-uniform surface activity of the electronic aluminum foil, special cleaning treatment is added in the hole forming process, active points on the surface of the aluminum foil are increased, the number of invalid holes and short holes is reduced through four times of attenuation current hole forming, and the corrosion foil with higher tunnel hole diameter consistency is prepared, so that the consistency of corrosion hole forming is improved; the uniformity of the hole diameter of the etched aluminum foil is increased, so that the product capacity is improved.

The invention discloses a porous high-entropy perovskite composite material and a preparation method and application thereof, and belongs to the technical field of electrode materials, on the basis of an oxide LaFeO3, Mn < 2 + >, Co < 2 + >, Ni < 2 + > and Cu < 2 + > are adopted to dope and replace part of Fe < 3 + >, so that the porous high-entropy perovskite composite material with the chemical formula of La (Mn0. 2Fe0. 2Co0. 2Ni0. 2Cu0. 2) O3 is obtained, and the porous high-entropy perovskite composite material with the chemical formula of La (Mn0. 2Fe0. 2Co0. 2Ni0. 2Cu0. 2) O3 is prepared. The specific surface area and the porous structure of the high-entropy perovskite composite material are increased, more electrochemical active sites are exposed, and richer electrolyte ion transmission channels are provided, so that various properties of the electrode material prepared by taking the porous high-entropy perovskite composite material as the raw material are improved.

The invention relates to the technical field of aluminum electrolytic capacitors, in particular to a preparation method of a high-strength sintered foil for an aluminum electrolytic capacitor. The preparation method of the high-strength sintered foil for the aluminum electrolytic capacitor comprises the following steps: 1, uniformly mixing modified carbon quantum dot powder and aluminum powder, adding a solvent, and uniformly stirring to obtain modified aluminum powder slurry; 2, further adding a binder and an additive, and uniformly stirring to obtain mixed slurry; 3, uniformly coating the slurry on the surface of an aluminum foil substrate and curing; 3, sintering the obtained aluminum foil substrate; and 4, forming the sintered foil to obtain the anode powder sintered foil. Compared with the prior art, the high-strength sintered foil for the aluminum electrolytic capacitor has the advantages that high capacity and mechanical strength are guaranteed, carbon residues are avoided, and the dielectric property of the sintered foil is improved.

Provided is an electrolytic capacitor that makes it possible to improve an initial characteristic by a simple method and maintain the initial characteristic after use for a long period of time. An electrolytic capacitor according to the present invention is characterized by comprising: a capacitor element which has a positive electrode foil that has a positive electrode oxide film on a surface thereof, a negative electrode foil, and a separator that is inserted between the positive electrode foil and the negative electrode foil; a conductive polymer layer which is impregnated into the capacitor element; and an electrolytic solution which is impregnated into the capacitor element, wherein the mass E2 per unit volume of the electrolytic solution impregnated into the center part of the separator is larger than the mass E1 per unit volume of the electrolytic solution impregnated into the end part of the separator.

The electrochemical device includes: a case including a recessed container having a bottom and a side wall, and a cap covering the opening of the recessed container; a power generation element including a laminate having an electrode layer, an electrode layer and a solid electrolyte layer laminated together and contained in the interior space of the case such that the bottom and electrode layer face each other; and a conductive plate located adjacent to the opening of the recessed container and positioned between the electrode layer and cap. The recessed container includes insertion holes with openings in the upper end surface of the side wall. The conductive plate includes elastic locking portions located on edges thereof and corresponding in position to the insertion holes. With each elastic locking portion inserted in an insertion hole, the tip portion of the elastic locking portion presses a side surface of the insertion hole.

The invention provides a capacitor electrode plate, a preparation method thereof and a capacitor using the capacitor electrode plate. The capacitor electrode plate comprises an electrode active material layer and a conductive adhesive layer compounded with the electrode active material layer. The capacitor electrode plate has good conductivity and mechanical properties, and can improve the energy density and cycling stability of a capacitor using the capacitor electrode plate.

To provide a solid electrolytic capacitor excellent in productivity, and a method for manufacturing the solid electrolytic capacitor, with which an area ratio of a capacitor element portion in an anode foil and a mechanical strength of the anode foil can be improved.SOLUTION: A solid electrolytic capacitor 100 includes: a laminate 11 in which a plurality of solid electrolytic capacitor elements 10 are laminated; a sealing body 110 sealing the laminate; and an anode terminal electrode 120 and a cathode terminal electrode 130 provided on the same surface of the sealing body. Each of the solid electrolytic capacitor elements includes an anode foil 40 and a cathode portion 43 provided in a central part 40C of the anode foil so as not to cover one end 40A and an other end 40B of the anode foil. The one ends 40A of the anode foils of the solid electrolytic capacitor elements are electrically connected to each other and connected to the anode terminal electrode, while the other ends 40B are sealed with the sealing body. A plurality of the cathode portions of the solid electrolytic capacitor elements are electrically connected to each other, and are electrically connected to the cathode terminal electrode.SELECTED DRAWING: Figure 2

The invention discloses an MOF-derived CoNiFe-LDH / CCH self-supporting electrode material and a preparation method thereof, and the preparation method comprises the steps: growing (1D) nano needle basic cobalt carbonate (CCH) on pretreated foamed nickel by adopting a hydrothermal method, and growing (3D) polyhedral ZIF-67 by taking CCH as a sacrificial template to obtain a ZIF-67 / CCH precursor; and carrying out chemical etching and ion exchange on nickel nitrate hexahydrate and ferrous sulfate heptahydrate to obtain the (2D) nanosheet coated CoNiFe-LDH / CCH self-supporting electrode material. The specific capacitance of the CoNiFe-LDH / CCH electrode material prepared under preferable conditions can reach 2856.6 F / g when the current density is 1 A / g, and a sample can keep 93.02% of the initial capacitance of the CoNiFe-LDH / CCH electrode material after 3000 times of cyclic charging and discharging. The method is environment-friendly, low in material cost and excellent in electrochemical performance, and has huge potential in practical application of supercapacitors.

The invention provides a sodium ion battery capacitor and a preparation method thereof. The sodium-ion battery capacitor comprises a positive pole piece, a negative pole piece, a diaphragm and an electrolyte, the positive pole piece comprises a composite positive pole material, and the composite positive pole material comprises a capacitive material and a layered oxide; the negative electrode plate comprises a composite negative electrode material, and the composite negative electrode material comprises hard carbon and a surface functional group modified porous carbon nanotube. The capacitive material and the layered oxide are synergistically matched to serve as the composite positive electrode material, a three-dimensional porous network structure is formed, and the synergistic effect of the double-electrode-layer capacity and the oxidation-reduction reaction can be improved; the hard carbon and the surface functional group modified porous carbon nanotube are synergistically matched to serve as the composite negative electrode material, so that the sodium ion diffusion path, the electrolyte infiltration area and the charge-discharge efficiency are favorably optimized, and the sodium ion adsorption capacity is improved. The sodium ion battery capacitor has the characteristics of high energy density, high power density, wide temperature range charging and discharging capability and the like.

Provided is a separator for an electricity storage device, the separator including a base material 10 that is a microporous polyolefin membrane containing polyolefin as a main component and a coating layer 20 disposed on at least one surface of the base material 10, wherein the coating layer 20 includes an inorganic filler 1 and a thermoplastic polymer, the thermoplastic polymer includes a particulate polymer 2 protruding from the surface of the inorganic filler portion 1, and a particle size distribution of the particulate polymer 2 has two or more particle diameters.

The invention provides conductive copper-based slurry for a laminated solid aluminum capacitor core and a preparation method and application of the conductive copper-based slurry, and relates to the technical field of solid aluminum capacitors. The conductive copper-based slurry for the laminated solid aluminum capacitor core comprises the following components in parts by weight: 40-60 parts of conductive filler, 5-15 parts of polymer resin and 30-50 parts of solvent, the conductive filler is antioxidant copper powder and / or silver coated copper powder. The conductive copper-based slurry is a high-solid-content and low-viscosity system, the dip-coating process is adapted by regulating and controlling the ratio of the conductive filler to the organic carrier, and high conductivity under low-temperature air curing is achieved; by reasonably adding the anti-settling agent, the dispersing agent, the solvent and other organic carriers, it is ensured that the slurry meets the requirements for viscosity and suspension property of the dipping process, slurry settling is effectively prevented, the film thickness uniformity after dipping, pulling and curing and the equivalent series resistance stability of a finally obtained capacitor core are ensured, and the performance stability and reliability of a capacitor are improved.

The invention discloses a method for preparing mesoporous Bi2O3 through block polymer micelle induced self-assembly and application, and relates to the field of supercapacitor electrode materials. The method comprises the following steps: dissolving P123 in a solvent, adding an acidic reagent, then adding Bi (NO3) 3.5 H2O or BiCl3, and uniformly stirring to form a mixed solution; preparing KOH into a KOH solution, adding the KOH solution into the mixed solution, stirring, and standing to obtain the mesoporous Bi2O3. Mesoporous Bi2O3 is synthesized by adopting a micelle-induced self-assembly method, the microtopography and particle size of the mesoporous Bi2O3 can be regulated and controlled, the mesoporous structure enables the Bi2O3 material to have higher specific surface area and porosity, more active sites are exposed, the stability and electrochemical performance of the Bi2O3 electrode material are improved, and the preparation method is suitable for industrial production. The problems of poor conductivity and poor cycling stability are solved.

The invention discloses a supercapacitor based on a carbon sequestration building energy storage material, and belongs to the technical field of capacitors. According to the technical scheme, the supercapacitor based on the carbon sequestration building energy storage material comprises an electrode component, the electrode component is prepared by mixing, forming and curing carbon sequestration red mud, a carbon metal framework composite material, cement and gravel aggregate, and the carbon sequestration red mud is a carbonate sequestration material generated by reaction of red mud and CO2; the electrolyte is an alkaline solution formed by dissolving soluble alkali in red mud pores or an additionally injected alkaline electrolyte; a multi-stage conductive network is constructed through the synergistic effect of the carbon sequestration red mud and the carbon metal framework composite material, the electrolyte is formed in situ by using the alkaline component of the red mud, and the functions of CO2 mineralization storage and electrochemical energy storage are integrated into the building material; the method has the advantages of low cost, excellent environmental protection property, red mud resource utilization, permanent CO2 storage and high integration level of building energy storage functions.

An electrochemical device is provided that allows a conductive plate positioned between the power generation element and cap to be easily mounted and that is capable of maintaining a good electrical connection. The electrochemical device 1 includes: a case 10 including a recessed container 11 having a bottom 111 and a side wall 112, and a cap 12 that covers the opening of the recessed container 11; a power generation element 20 including a laminate having an electrode layer 21, an electrode layer 22 and a solid electrolyte layer 23 laminated together and contained in the interior space of the case 11 such that the bottom 111 and electrode layer 21 face each other; and a conductive plate 30 located adjacent to the opening of the recessed container 11 and positioned between the electrode layer 22 and cap 12. The recessed container 11 includes a plurality of insertion holes 115 with openings in the upper end surface of the side wall 112. The conductive plate 30 includes a plurality of elastic locking portions 31 located on edges thereof and corresponding in position to the insertion holes 115. With each elastic locking portion 31 inserted in an insertion hole 115, the tip portion 311 of the elastic locking portion 31 presses a side surface of the insertion hole 115.

Provided is a separator for an electricity storage device, the separator comprising a base material (10), which is a polyolefin microporous film containing a polyolefin as a main component, and a cover layer (20), which is disposed on at least one surface of the base material (10) and contains an inorganic filler (1) and a thermoplastic polymer, the thermoplastic polymer contains a particulate polymer (2) protruding from the surface of the inorganic filler part (1), and the particle size distribution of the particulate polymer (2) has two or more particle sizes.