56 results about "Lithium-ion capacitor" patented technology

The invention discloses a lithium ion capacitor negative electrode based on an MXene carbon nanotube composite material and a preparation method thereof, and the main points of the technical scheme are that the lithium ion capacitor negative electrode based on the MXene carbon nanotube composite material is composed of an MXene sheet layer, a hydroxyl modified carbon nanotube and a binder; the MXene sheet layer is Ti3C2Tx, the interlayer spacing is 1.0-1.3 nm after the MXene sheet layer is etched by hydrofluoric acid, and the content of-OH functional groups on the surface accounts for 40-60% of the total functional groups; the diameter of the hydroxyl-modified carbon nanotube is 10 to 30 nm, the length of the hydroxyl-modified carbon nanotube is 500 to 2000 nm, and the hydroxyl modification degree of the hydroxyl-modified carbon nanotube is 2.5 to 4.0 mmol / g; the mass ratio of the MXene sheet layer to the hydroxyl modified carbon nanotube is 7: 3-8: 2, and the MXene sheet layer and the hydroxyl modified carbon nanotube are combined through hydrogen bonds to form a layered porous structure.

An aerosol provision device for providing aerosol during a puff on the aerosol provision device is disclosed. The aerosol provision device comprises at least one power supply comprising at least one supercapacitor configured to supply electrical power to at least one aerosol generator for generating aerosol from aerosol generating material. The at least one supercapacitor is a lithium-ion capacitor, LIC, comprising an anode and a cathode, wherein the anode and / or the cathode comprises one or more dopants.

A lithium-ion capacitor, an electric device, and a lithium supplementing method. The lithium-ion capacitor comprises a positive electrode sheet and a negative electrode sheet. The positive electrode sheet comprises a positive electrode material applied to the surface of a positive electrode current collector, and the positive electrode material comprises a mixture of lithium iron phosphate, a conductive carbon material, a porous carbon material and a PVDF binder. The negative electrode sheet comprises a negative electrode material applied to the surface of a negative electrode current collector, the negative electrode material comprises hard carbon, a conductive carbon material, a thickening agent and an SBR binder, and the thickening agent comprises CMC-Li. When charged for the first time after formation, the lithium-ion capacitor is charged at an initial charging current of 0.1C to 0.5C for 1-5 hours, and then is charged at 0.2C to 4.0V to 4.3V; when the capacitor is charged to 70% to 100% of SOC, the charging is paused for 30 minutes to 60 minutes, and then the capacitor is charged at a reduced charging current of 0.01C to 0.08C until the voltage reaches an upper limit voltage of 4.0V to 4.3V to complete the first charging.

A non-aqueous electrolyte solution for a secondary battery, containing a first compound represented by the following Formula (1), a second compound represented by the following Formula (2), a non-aqueous solvent, and an electrolyte.

The present invention relates to the technical field of lithium-ion capacitors, and in particular to an electrolyte for a lithium-ion capacitor and a lithium-ion capacitor. The electrolyte for a lithium-ion capacitor comprises an organic solvent, a lithium salt, and additives, wherein the additives include a negative electrode film-forming additive and a water‑removal and acid‑suppression additive. By selecting the negative electrode film-forming additive and the water‑removal and acid‑suppression additive for use in reasonable combination with the organic solvent and the lithium salt, the electrolyte for a lithium-ion capacitor of the present invention enables lithium-ion capacitors to have high energy density performance and a longer cycle life.

The present invention provides a battery-type lithium-ion capacitor and an electronic device. The battery-type lithium-ion capacitor comprises a negative electrode sheet. The negative electrode sheet comprises a negative electrode current collector and a negative electrode active layer provided on at least one surface of the negative electrode current collector. The negative electrode active layer comprises a negative electrode active material, and the negative electrode active material comprises hard carbon and graphite. In the negative electrode active material, the mass percentage of graphite is 2-45%. In the present invention, the graphite in the negative electrode sheet can reduce the consumption of lithium ions by the battery-type lithium-ion capacitor when charging and discharging for the first time, which, overall, improves the efficiency of the battery-type lithium-ion capacitor during charging and discharging for the first time, reduces capacity loss of the battery-type lithium-ion capacitor during charging and discharging, and increases the energy density of the battery-type lithium-ion capacitor.

The invention provides a graphene / activated carbon composite material and a preparation method and application thereof, and belongs to the technical field of nano materials, the graphene / activated carbon composite material comprises a carbon matrix and a two-dimensional sheet material covering the carbon matrix; the carbon matrix is an activated carbon material and is a carbon material prepared by performing high-temperature pyrolysis on magnesium citrate in a high-temperature self-propagating reaction process; the two-dimensional sheet material is a graphene material and is a few-layer carbon material which is prepared by converting CO2 through a high-temperature self-propagating reaction and is formed by arranging carbon atoms according to a honeycomb-shaped two-dimensional lattice. According to the invention, graphene is used as a conductive and structural dual skeleton; and a hierarchical pore structure is constructed by utilizing gas production and template effect in the reaction process, so that the electrochemical performance of the active carbon positive electrode is improved. And a proper amount of graphene can provide more active sites and maintain the structural stability at the same time, so that the specific capacity and the cycle life are remarkably improved and prolonged, and the material has a wide application prospect and is particularly suitable for preparing a high-performance lithium ion capacitor positive electrode material.

The invention relates to the technical field of electrolyte, in particular to electrolyte for a lithium ion capacitor and a preparation method of the electrolyte. The electrolyte for the lithium ion capacitor comprises the following preparation raw materials: 50 to 55 parts of ethylene carbonate, 30 to 35 parts of methyl cyclohexylformate, 8 to 10 parts of siloxane solvent, 20 to 25 parts of lithium salt, 0.5 to 0.8 part of bis (trifluoromethanesulfonyl) imine, 2 to 5 parts of quaternary ammonium salt and 2 to 2.5 parts of functional additive. The electrolyte for the lithium ion capacitor prepared by the invention has excellent low-temperature performance, high power characteristic, wide temperature range adaptability, long cycle life and safety by optimizing the solvent system, the lithium salt ratio and the synergistic effect of the multifunctional additive, and is suitable for the high-performance lithium ion capacitor.

The application relates to the technical field of battery manufacturing equipment, and particularly discloses a low-temperature lithium ion capacitor electrolyte preparation device, which comprises a bottom plate, the upper surfaces of the two sides of the bottom plate are symmetrically fixedly connected with slide rods. The filling and installation of the electrolyte can be automatically realized through the injection mechanism, the automation degree of the device is greatly improved, the cost is reduced and the efficiency is improved for enterprises, the device can be matched with pipes with different diameters because the diameter of the bottom cover is much larger than that of the closing pipe, the applicability of the device is greatly improved, the problem that the device needs to be frequently replaced when matching pipes with different diameters is avoided, the top of the pipe is automatically sealed when injection is performed, the safety in the injection process is ensured, the safety hidden danger problem caused by electrolyte leakage is avoided, and the isolation effect of the electrolyte can be further improved through the central rod and the closing pipe, and the problem that the electrolyte leaks when not injecting is avoided.

A technique for pre-lithiating a lithium-ion capacitor includes preparing multiple cathodes, anodes, and separators, stacking them, injecting electrolyte, and performing a multi-step charging process. Some anodes have surfaces coated with a lithium foil of 10-40 μm thickness, while others remain uncoated, and they alternate in the stack. Cathodes may include air pores occupying 0.001% to 50% of the collector area, while anodes have fewer or no pores. By using partially coated lithium foil strips and controlling pressing, temperature, and charging rates, lithium-ions move through the cathode to the uncoated anodes, reducing manufacturing costs and achieving efficient pre-lithiation. Post-treatment steps may discard or rework incompletely lithiated anodes. The approach provides a flexible way to optimize foil thickness, pore distribution, and charging profiles, enabling high-performance lithium-ion capacitors with improved cost and process efficiency.

The invention discloses a positive electrode interface construction method and application in a lithium ion capacitor, and belongs to the technical field of capacitors. According to the method, a specific type of electrolyte for CEI construction of fluorine-containing lithium salt and a cyclic carbonate solvent is injected into the lithium ion capacitor, constant-current charging is carried out until the capacity is 150%-1500% of the nominal capacity, and a composite CEI layer containing an AlxOyFz / LiF inorganic phase and a polyester / polycarbonate organic phase is constructed on the surface of an activated carbon positive electrode in situ by utilizing the micro-corrosion effect of the electrolyte on an aluminum current collector. After the electrolyte for circulation is replaced, the obtained lithium ion capacitor shows excellent overcharge gas production inhibition capability, and the mechanism is that AlxOyFz in CEI catalyzes polymerization of cyclic carbonate under a high-voltage condition, so that generation of gaseous oxidation products is avoided. According to the method, the CEI thickness can be accurately regulated and controlled, the electrochemical performance and the safety are both considered, and the method is suitable for a lithium ion capacitor system adopting lithium metal or a lithium ion battery negative electrode material.

Disclosed is a manufacturing method of a lithium-ion capacitor, comprising a positive electrode production step of mixing a lithium-rich material, activated carbon, a conductive additive and a aqueous adhesive to form a slurry by using water as a solvent, and then applying the slurry to a carbon-coated aluminum foil to form a positive electrode sheet; a negative electrode production step of mixing a negative electrode material, a conductive additive and a aqueous adhesive to form a slurry by using water as a solvent, and then applying the slurry to a copper foil to form a negative electrode sheet; and an assemble step of assembling the positive electrode sheet, the negative electrode sheet, an electrolyte and a separator into a capacitor without pre-lithiation.

The application relates to the technical field of lithium ion capacitors, and particularly discloses a vibration-resistant maintenance-free lithium ion capacitor and a preparation method thereof. The application takes titanium niobate@carbon particles as main raw materials, coats negative electrode slurry on a KH-550 modified etched copper foil after preparation, and forms a negative electrode sheet; takes nitrogen-doped mesoporous carbon microspheres as main raw materials, coats positive electrode slurry on a KH-560 modified etched aluminum foil after preparation, and forms a positive electrode sheet; and a polymer semi-solid electrolyte film is synthesized at the same time, and the lithium ion capacitor is assembled after stacking. The lithium ion capacitor has the advantages of low internal resistance, high power density, good vibration resistance, reliable capacitor device structure, stable electrical performance, and is particularly suitable for high-power energy storage and pulse discharge scenes in a harsh working environment.

The invention provides a battery type lithium ion capacitor and electronic equipment. The battery type lithium ion capacitor comprises a negative plate; the negative plate comprises a negative current collector and a negative active layer arranged on at least one surface of the negative current collector; the negative electrode active layer comprises a negative electrode active material, the negative electrode active material comprises hard carbon and graphite, and the mass percentage content of the graphite in the negative electrode active material is 2-45%. According to the battery type lithium ion capacitor, the graphite in the negative plate can reduce the consumption of lithium ions when the battery type lithium ion capacitor is charged and discharged for the first time, the first charging and discharging efficiency of the battery type lithium ion capacitor is improved on the whole, the capacity loss of the battery type lithium ion capacitor in the charging and discharging process is reduced, and the energy density of the battery type lithium ion capacitor is improved.

The embodiment of the invention provides an intrinsic safety lithium ion battery-capacitor combined power supply system and a control method thereof. The intrinsic safety lithium ion battery-capacitor combined power supply system comprises a battery module arranged on a first branch, a capacitor module arranged on a second branch and a passive film impedance spectroscopy monitoring module, the first branch circuit and the second branch circuit are connected in parallel and then connected to two ends of a target load in parallel; the passive film impedance spectroscopy monitoring module is connected in parallel with the battery module; the passive film impedance spectroscopy monitoring module obtains the phase angle of the passive film of the battery module in real time, determines whether the passive film of the battery module is thickened or not based on the corresponding relation between the preset phase angle and the thickness of the passive film, and gives an alarm prompt when the thickness exceeds a thickness threshold value. According to the invention, the technical problems in the prior art that the safety is low and the passivation risk cannot be pre-judged because the intrinsic safety lithium sub-capacitor combined power supply system is protected only by adding a fuse or a trunk and adding a PTC are solved, and the technical effects of monitoring the passivation risk of the power supply system and improving the safety of the power supply system are realized.

The present application belongs to the technical field of energy storage materials, and particularly relates to a carbon-containing metal oxide negative electrode material, a preparation method thereof and a lithium ion capacitor. Compared with the prior art, the present application innovatively uses a nanostructured metal organic framework material as a precursor, and forms a nanostructured metal oxide material as a lithium ion capacitor negative electrode material through heat treatment. The confinement effect between the metal sites and the organic ligands connected by strong coordination bonds can effectively slow down the volume expansion effect of the material, and the potential catalytic effect of the metal elements can promote the graphitization degree of the surrounding carbon, thereby further enhancing the electronic conductivity and surface roughness of the negative electrode, and improving the energy density of the lithium ion capacitor.

The application discloses a double-layer negative plate preparation method in the field of energy storage equipment. The preparation process comprises three main steps: firstly, negative electrode slurry A is prepared, hard carbon, conductive carbon black, natural graphite, single-walled carbon nanotube dispersion liquid and polyvinylidene fluoride are stirred and uniformly mixed in a dry room with a dew point of-30 to-40 DEG C according to a specific mass ratio, and 1-methyl-2-pyrrolidone is added and stirred uniformly; secondly, negative electrode slurry B is prepared, and the process is similar to that of A, but a part of the hard carbon is replaced by an HL mixture (mixed uniformly by hard carbon and lithium cobalt nitride according to a specific ratio); finally, a double-layer negative plate is prepared, a layer of negative electrode slurry A or B is coated on both sides of the copper current collector and first dried, another layer is coated and second dried, and finally, the double-layer negative plate is obtained through rolling and cutting. The double-layer negative plate design aims to solve the problems of low first effect of hard carbon and insufficient power density in the super-high rate constant-current discharge.

The invention discloses a coal-based carbon negative electrode material, a preparation method thereof and a full-carbon-based lithium ion capacitor, and the preparation method comprises the following steps: S1, crushing and screening coal to obtain coal powder, mixing the coal powder with an alkaline solution, stirring at a high temperature, and cooling to room temperature to obtain pre-oxidized coal; s2, deionized water is added into the coal pre-oxidized in the step S1, heating and boiling are carried out, washing and suction filtration are carried out multiple times with boiling water, and purified raw materials are obtained after aftertreatment; and S3, roasting the raw material purified in the step S2 at a high temperature of 600-2400 DEG C in an inert gas or vacuum environment, and performing post-treatment to prepare the coal-based carbon negative electrode material of high-conductivity soft carbon. The coal-based carbon negative electrode material prepared by the invention is applied to a lithium ion capacitor, so that the lithium ion capacitor has relatively high capacity, energy density and power density, stable cycle performance and good safety performance.

An energy storage device can include a cathode and an anode, where at least one of the cathode and the anode are made of a polytetrafluoroethylene (PTFE) composite binder material including PTFE and at least one of polyvinylidene fluoride (PVDF), a PVDF co-polymer, and poly(ethylene oxide) (PEO). The energy storage device can be a lithium ion battery, a lithium ion capacitor, and / or any other lithium based energy storage device. The PTFE composite binder material can have a ratio of about 1:1 of PTFE to a non-PTFE component, such a PVDF, PVDF co-polymer and / or PEO.

The invention discloses an elevator comprehensive energy-saving system based on a lithium ion capacitor. Comprising a target elevator controller, a three-phase electric quantity metering circuit, a three-phase SPWM shaping and bidirectional filtering circuit, a six-tube three-phase bidirectional ACDC conversion circuit, a three-phase phase detection circuit, a multiplication phase locking circuit, a high-voltage direct-current filtering circuit, a four-tube H-bridge high-voltage bidirectional switch, a high-voltage high-frequency energy storage inductor, a lithium ion capacitor energy storage unit and a lithium ion capacitor equalization and protection circuit. The system comprises a digital signal processor (DSP) signal processing and control core circuit, a CAN communication circuit, a display circuit, an emergency leveling signal interface circuit, node voltage, current and temperature detection circuits and a system power supply. Compared with an existing energy feedback type elevator energy-saving system, interference to a power grid is small, and the pulse interference-free level can be achieved. Compared with an existing super-capacitor energy storage type elevator energy recovery system, the cost is lower, and industrial popularization is more facilitated.

The invention provides a porous carbon material with a stepped hole structure as well as a preparation method and application thereof, and belongs to the technical field of carbon materials. According to the present invention, the thermal treatment temperature of the heavy hydrocarbon-containing raw material in the oxygen-containing atmosphere is regulated to regulate the polymerization degree of the hydrocarbon molecules so as to obtain the carbon components with different activities, such that the porous carbon material with the cascade pore structure is obtained; the stepped porous carbon material provided by the invention contains two-stage pore channels of micropores and mesopores, the operation process is simple, industrial amplification is facilitated, and the material has excellent rate capability when being applied to a positive electrode material of a lithium ion capacitor.

This invention relates to an electroactive porphyrin-based conjugated microporous polymer material, its preparation method, and its applications. The porphyrin-based conjugated microporous polymer is obtained from raw materials containing porphyrin-based monomers and aromatic amine monomers through a coupling reaction. The electroactive porphyrin-based conjugated microporous polymer material of this invention exhibits excellent electrochemical performance as an electrode material. Lithium-ion capacitors constructed using this material possess characteristics such as high specific capacitance, high energy density, fast charging rate, and long cycle life. This invention has good application potential in lightweight, high-specific-energy, fast-charging energy storage devices.

The utility model provides an efficient heat dissipation type lithium ion capacitor which comprises a capacitor module, end plates are arranged at the front end and the rear end of the capacitor module, side plates are arranged on the left side and the right side of the capacitor module, and the end plates and the side plates are detachably connected. The side plate is provided with a series line bank which is electrically connected with a single capacitor terminal in the capacitor module. Heat dissipation covers are arranged above and below the capacitor module, heat dissipation covers are further arranged on the left side and the right side of the capacitor module, the heat dissipation covers and the heat dissipation covers are detachably installed on the end plates, a plurality of heat dissipation holes are formed in the heat dissipation covers and the heat dissipation covers, and liquid cooling assemblies are arranged between the heat dissipation covers and the capacitor module and between the heat dissipation covers and the side plates. The efficient heat dissipation type lithium ion capacitor provided by the utility model has the advantages of compact structure, small size, high integration degree and good heat dissipation effect, and not only can effectively realize the limiting protection of the capacitor module, but also can ensure the effective heat dissipation of the capacitor module.

The invention provides a three-dimensional flower-shaped carbon-supported CuNb2O6 material as well as a preparation method and application thereof, and belongs to the technical field of electrochemical devices. The preparation method of the three-dimensional flower-shaped carbon-supported CuNb2O6 material comprises the following steps: dissolving a niobium source, a copper source and a surfactant in a solvent, and stirring and mixing to obtain a precursor solution; adding carbon nanoflowers into the precursor solution for reaction, and after the reaction is finished, evaporating the solvent to dryness to obtain a CuNb2O6 precursor; the CuNb2O6 precursor is subjected to calcination treatment, cooling, washing and freeze drying, and the three-dimensional flower-shaped carbon-supported CuNb2O6 material is prepared. The supporting effect of the three-dimensional flower-shaped carbon network in the prepared composite material effectively improves the specific capacity of the composite material, and the addition of Cu obviously enhances the conductivity of Nb2O5, so that the impedance is reduced. The cycling stability and the rapid charging capability of the CuNb2O6 negative electrode material in a lithium ion capacitor are effectively improved through the synergistic effect of the three-dimensional carbon network and Cu, and the method is simple, low in cost and capable of achieving large-scale production.

The invention discloses a lithium ion capacitor negative plate, a preparation method thereof and a lithium ion capacitor, and relates to the technical field of capacitors. The preparation method of the negative plate comprises the following steps: mixing antimony powder, urea, boric acid, polyethylene glycol-2000, a nano porous silicon-carbon composite material, glucose, conductive carbon black and phenolic resin, adding deionized water, stirring at 60 DEG C for 30-40 minutes, ultrasonically dispersing, coating on the surface of acid-treated carbon cloth, carbonizing, performing electro-deposition treatment, cleaning, drying, and annealing to obtain the negative plate. And obtaining the lithium ion capacitor negative plate. Due to the introduction of the nano porous silicon-carbon composite material, the phenolic resin and other components, the rate capability, the cycling stability, the energy density and other electrochemical properties of the lithium ion capacitor containing the negative plate are effectively improved. Therefore, the prepared lithium ion capacitor negative plate has a wider application prospect.

A non-aqueous electrolyte solution for a secondary battery, containing a first compound represented by the following Formula (1), a second compound being at least one selected from the group consisting of a compound represented by the following Formula (2), a compound represented by the following Formula (3), and a compound represented by the following Formula (4), a non-aqueous solvent, and an electrolyte.

The utility model relates to a vehicle-mounted lithium ion capacitor power supply device. The capacitor power supply device comprises a fast charging pile, a lithium carbon capacitor module, a power supply module, a power supply module output terminal, an electric lock switch, a capacitor management system and an electric bicycle controller, the lithium carbon capacitor module is connected with a fast charging pile connected with the mains supply; the positive electrode and the negative electrode of the fast charging pile are respectively connected with the positive electrode and the negative electrode of the lithium-carbon capacitor module; the positive electrode and the negative electrode of the lithium-carbon capacitor module are respectively connected with the positive electrode and the negative electrode of the capacitor management system; the positive electrode and the negative electrode of the capacitance management system are connected with the positive electrode and the negative electrode of the power module respectively. The lithium-carbon capacitor has the advantages that the lithium-carbon capacitor is high in energy density and power density, has large-current charging and discharging capacity, the cycle life reaches 50,000 times, the self-discharging rate is low, the lithium-carbon capacitor can be placed for 3 months at the normal temperature of 25 DEG C, the voltage drop is smaller than or equal to 5%, the lithium-carbon capacitor has a wide temperature range from-40 DEG C to 65 DEG C, and the lithium-carbon capacitor has high safety and reliability.

A lithium ion capacitor includes binder free positive and negative electrode active layers. The capacitor exhibits high energy density, power density and cycle life and provides a good compromise in performance between an electric double layer capacitor and a lithium ion battery.

Method for fabricating an electrode pair for a Lithium-Ion Capacitor (LIC), where the method comprises the steps of preparing the positive electrode by, etching microstructures with a predetermined roughness in a surface of a metal film substrate, depositing in said microstructures a metal or metal compound layer, converting said metal or metal compound layer into metal nanoparticles, growing interconnected cross linked carbon nanotubes in said microstructures at said metal nanoparticle, and preparing the negative electrode.

The invention provides a carbon-coated titanium niobium oxide negative electrode lithium ion capacitor and a preparation method thereof, and belongs to the technical field of lithium ion capacitors. The capacitor comprises a positive pole piece, a negative pole piece, a current collector, a diaphragm and electrolyte, a positive pole adopts a high-nickel single crystal material and activated carbon composite system and is internally provided with a pre-lithiation material, and a negative pole adopts carbon-coated titanium niobium oxide. The energy density reaches 30-130 Wh / kg, the power density reaches 3-10 kW / kg, and the performance blank of a traditional supercapacitor and a lithium ion battery is filled; and the working voltage is 1.5-2.8 V, the battery can be discharged to 0V for storage and transportation, a tedious formation process is omitted, and the production period is shortened to be within 15 days. Multiple breakthroughs of energy, power, safety and production efficiency are achieved, and the hybrid energy storage device is suitable for high-requirement hybrid energy storage scenes and has high practical value and industrialization prospects.