1148results about "Electrolytic capacitors" patented technology

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 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.

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.

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 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 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.

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.

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.

The application discloses a preparation method of a high-density and high-stability conductive polymer film based on electrochemical polymerization, and comprises the following steps: using an oxidant solution and a BFDO monomer solution to pretreat a formed foil to obtain a working electrode, then immersing the working electrode and a reference electrode into an electrolyte to perform electrochemical oxidation polymerization, and obtaining the high-density and high-stability conductive polymer film based on electrochemical polymerization. The pretreated formed foil containing N-type conductive polymer PBFDO is prepared by using a chemical in-situ polymerization method on the formed foil, and when the pretreated formed foil is applied in the field of capacitors, the conductivity and electron transport capacity of the capacitor can be improved, and the stability problem caused by the coupling of positive and negative charges in the traditional capacitor is greatly improved.

The invention discloses a cylindrical supercapacitor with a positive electrode and a negative electrode located on the same side of a roll core and a processing technology. The cylindrical supercapacitor comprises a shell, the roll core arranged in the shell and a cover plate arranged on the opening side of the shell. A roll core center hole is formed in the center of the roll core, and a negative pole column containing a liquid injection hole is arranged on the cover plate; a positive tab and a negative tab are arranged on the end face, close to the cover plate, of the roll core, surround a center hole of the roll core and are symmetrically arranged, the positive tab and the negative tab are arranged in an annular structure composed of discontinuous arc sections, and the negative tab is located on the inner side of the annular structure. A gap for placing an insulating ring is reserved between the outer edge part of the negative tab and the inner edge part of the positive tab on the outer side of the annular structure; the positive pole lug and the negative pole lug are respectively and correspondingly provided with a positive pole current collecting disc and a negative pole current collecting disc, the positive pole current collecting disc is connected with the upper edge of the slot rolling position on the inner wall of the shell, and the negative pole current collecting disc is connected with a cover plate provided with a negative pole column.

The invention provides a manufacturing method of a medium-high voltage formed foil. The manufacturing method comprises the following steps: carrying out pretreatment on an aluminum foil by using a hydrogel pretreatment solution containing polycations and polyanions; and performing multi-stage formation treatment on the pretreated aluminum foil by using formation liquid. The invention further provides the medium-high voltage formed foil obtained through the manufacturing method. The flexibility of the formed foil is improved while the hydration resistance of the formed foil is improved.

The invention belongs to the technical field of composite electrode materials, and relates to a preparation method of a CeO2-induced composite vacancy-rich Sv-NiCo-SxOHy layered flexible electrode material, which comprises the following steps: soaking ZIF-L / CC in a Lewis acid Ni ion aqueous solution for in-situ self-deposition reaction, washing and drying to obtain a layered electrode NiCo-LDH / CC; and continuously immersing into an ethanol solution containing a sulfur source, transferring into a reaction kettle for solvothermal reaction, naturally cooling, taking out, washing with deionized water and absolute ethyl alcohol for multiple times, drying at 60 DEG C to obtain a sulfur-coated layered electrode S-NiCo-LDH / CC, mixing the sulfur-coated layered electrode S-NiCo-LDH / CC with cerium salt and HMT, reacting in a high-pressure kettle at 160-200 DEG C for 4-8 hours, washing with deionized water, and drying to obtain the sulfur-coated layered electrode S-NiCo-LDH / CC. In-situ growth of CeO2 nanoparticles is utilized to enhance interface charge transfer, alkali-assisted high-temperature preparation of sulfur vacancies and doped sulfur synergistically widen a conductive network, and volume deformation is relieved through an interlayer confinement effect; when the obtained material is applied to a positive electrode of a supercapacitor, the self-supporting material avoids the use of an adhesive, the impedance of the material is reduced, and the electrochemical performance of the electrode is improved.

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 source coupled to one of the inputs, wherein the power source provides positive and negative input currents to the input, the positive input current flows in to one of the inputs and the negative input current flows out another of the inputs; and a controller for controlling the power source to provide alternating between the positive and negative input currents to the input 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 an aluminum foil and a preparation method thereof, the preparation method comprises the following steps: the aluminum foil is subjected to electrochemical corrosion in a mixed acid solution, the half cycle of alternating current adopted by the electrochemical corrosion comprises a plurality of wave crests, and the mixed acid solution comprises at least one of nitric acid and phosphoric acid; passivating the aluminum foil; washing the aluminum foil with water; and the steps of electrochemical corrosion, passivation treatment and water washing are repeated until the aluminum foil reaches the preset corrosion amount. The nitric acid can improve the overall corrosion amount, reduce the surface corrosion of the aluminum foil and promote the longitudinal development of corrosion. Phosphate radicals and aluminum ions can form a complex, so that the concentration of free Al < 3 + > in a hole etching area is reduced, corrosion reaction balance is pushed to move rightwards, and further corrosion is promoted.

The invention relates to the technical field of aluminum electrolytic capacitors, in particular to an anode foil production device and method for an aluminum electrolytic capacitor. Comprising a foundation assembly, the foundation assembly comprises a base, a portal frame is installed on the top of the base, and a hollow conveying belt is installed in the base; a drying assembly is installed in the portal frame and comprises an upper drying bin fixedly connected into the portal frame, and an upper drying rod is arranged at the bottom of the upper drying bin. A lower drying bin is fixedly connected into the base and located in the middle of the hollowed-out conveying belt, and a lower drying opening is formed in the upper portion of the lower drying bin. Aiming at the defects in the prior art, the invention provides the anode foil production device and method for the aluminum electrolytic capacitor, which can effectively solve the problems of anode foil deformation and surface damage caused by overlarge airflow impact during drying and material performance change caused by local high temperature in the prior art.

Provided are a negative electrode body that can suppress generation of hydrogen gas and an electrolytic capacitor that comprises the negative electrode body. A negative electrode body according to the present invention comprises: a negative electrode foil that comprises a valve action metal; and a carbon layer that includes a carbon material and is layered on the negative electrode foil. Analysis of the carbon material by x-ray photoelectron spectroscopy gives a peak P1 from C-O bonds on the O1s spectrum, a peak P2 from O-C=O bonds on the O1s spectrum, and a peak P3 from C=O bonds on the O1s spectrum. The ratio of the total value of the area ratio [COO] of peak P2 and the area ratio [C=O] of peak P3 to the area ratio [C-O] of peak P1 is ([COO]+[C=O]) / [C-O]<2.0.

A capacitor includes multiple capacitor elements including a first end surface electrode and a second end surface electrode; a first conductor in contact with and electrically connected to the first end surface electrode; a second conductor in contact with and electrically connected to the second end surface electrode; a third conductor adjacent to the first conductor, the third conductor including an embedded part positioned in a first section that overlaps with the first conductor and an exposed part positioned in a second section separate from the first section; and a sealing resin part sealing the third conductor to embed the embedded part and expose the exposed part.

A method of processing a battery including an electrode including pores filled with a gas involves applying a formation current to the battery, the formation current comprising at least one frequency attribute, the at least one frequency attribute based on an assessed dielectric attribute associated with wetting the pores with electrolyte. A method of processing a battery including a battery comprising an electrode involves applying a formation current to the battery comprising at least one frequency attribute, the at least one frequency attribute based on an assessed dielectric attribute associated with forming a solid electrolyte interphase (SEI) layer on the electrode.

The invention discloses a supercapacitor with a honeycomb structure and a preparation method thereof, the supercapacitor comprises a positive current collector, a negative current collector and a honeycomb energy storage layer, and the positive current collector and the negative current collector respectively cover two opposite surfaces of the honeycomb energy storage layer; the honeycomb energy storage layer is formed by folding, stacking and fixing a plurality of composite films, each composite film comprises a first electrode layer, an electrolyte layer and a second electrode layer, and the first electrode layer, the electrolyte layer and the second electrode layer are sequentially stacked and are respectively compounded and fixed through a bonding layer. The preparation method comprises the following steps: firstly, sequentially compounding and fixing the first electrode layer, the electrolyte layer and the second electrode layer to form a composite membrane with a sandwich structure, coating an adhesive on the single side surface of each composite membrane at intervals, and then stacking and stretching a plurality of composite membranes to form a honeycomb core structure; after folding, a positive current collector and a negative current collector are compounded on the two sides of the honeycomb core structure. An energy storage structure and a force bearing structure are organically combined, and the energy storage performance and the mechanical performance are synergistically improved.

The invention discloses a post-treatment liquid and application thereof in an anode foil formation post-treatment process, and the post-treatment liquid comprises the following components in percentage by mass: 0.1-5% of a main film-forming agent, 0.05-3% of a synergistic stabilizer and the balance of a solvent, the main film-forming agent is selected from at least one of a waterborne polyurethane emulsion and a silane coupling agent; the synergistic stabilizer is selected from at least one of organophosphate, molybdate and tungstate. The main film-forming agent and the synergistic stabilizer are compounded to obtain the post-treatment liquid, on one hand, the synergistic stabilizer is firmly combined with an aluminum oxide substrate to carry out deep passivation treatment on an oxidation film on the surface of the anode foil, and on the other hand, the synergistic stabilizer is subjected to network crosslinking with a hydrophobic protection layer formed by the main film-forming agent; the three-dimensional composite protective film can effectively isolate water molecules, repair microdefects on the surface of an oxidation film, prevent the phenomena of specific volume attenuation, leakage current increase and the like of the anode foil, and improve the long-term working reliability of the capacitor.

The invention provides a preparation method of conductive electrolytic paper, which comprises the following steps: uniformly mixing paper pulp and a conductive polymer solution, and then preparing the electrolytic paper, the conductive polymer solution comprises the following components in percentage by mass: 1%-10% of a conductive polymer, 0.1%-5% of a surfactant, 0.1%-10% of a cross-linking agent, 1%-20% of a conductivity improver and the balance of water. According to the preparation method, the appropriate conductive polymer solution and the paper pulp are ingeniously used for mixed papermaking in the papermaking process of the electrolytic paper, the density, strength and toughness of the electrolytic paper are improved, conductivity is achieved on the basis that the physical characteristics of existing electrolytic paper are enhanced, the paper resistance value is reduced, and the service life of the electrolytic paper is prolonged. The problem that the performance of the capacitor is unstable due to the fact that the liquid absorption effect of existing electrolytic paper on the conductive polymer solution is different is effectively solved, and the subsequent preparation process of the solid electrolytic capacitor is simplified.

A power storage device includes an electrode assembly where a positive electrode plate and a negative electrode plate are wound with a separator interposed between the positive electrode and negative electrode plates; and a positive electrode current collector joined to the positive electrode plate at an upper end of the electrode assembly in axial direction P. The positive electrode current collector includes a plate-shaped flange joined to the positive electrode plate at a face facing the positive electrode plate in axial direction P and a column with an adjustable length in axial direction P that protrudes from the flange toward an upper side in axial direction P.