115 results about "Lithium-ion capacitor" patented technology

The invention relates to the field of capacitor electrode materials, and discloses a porous carbon material and a preparation method thereof, a lithium ion capacitor positive electrode and a lithium ion capacitor, the specific surface area of the porous carbon material is 1500-3500m < 2 > / g, and the powder conductivity is not less than 50S / m; in an X-ray diffraction pattern of the porous carbon material, a characteristic peak of a (002) crystal face exists at 26 + / -0.5 degrees, and the half-peak width of the characteristic peak of the (002) crystal face is 0.4-1 degree. The porous carbon material is used as a positive electrode of a lithium ion capacitor, and has the characteristics of high specific capacity and good rate capability.

The invention discloses a long-circulation silicon-carbon negative electrode material as well as a preparation method and application thereof, and belongs to the technical field of negative electrode materials. The method comprises the following steps: firstly, carrying out liquid-phase atomized magnesium doping modification on a mesoporous carbon material, then efficiently depositing nano silicon by utilizing a vapor deposition technology, and carrying out gradient carbon layer coating on the basis to finally prepare the long-circulation silicon-carbon negative electrode material. The material is of a mesoporous core-shell structure, the diameter is 1-20 microns, and the material is mainly applied to the field of negative electrodes of lithium ion batteries or lithium ion capacitors. The cycling stability of the silicon-carbon negative electrode material is remarkably improved, the conductivity is improved through magnesium doping, so that the overall electrochemical performance is improved, and meanwhile, the preparation process is simple, convenient and feasible, and is suitable for industrial production.

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.

The invention discloses a hybrid energy storage device with high energy density and long cycle life, and relates to the technical field of electrochemistry. Comprising a positive electrode, a negative electrode, a diaphragm and an electrolyte, the positive electrode material is powder formed by connecting layered lithium-containing metal oxide and activated carbon in parallel, lithium cobalt oxide LCO or a lithium-rich manganese base with a set proportion is added into the layered lithium-containing metal oxide, and the negative electrode material is formed by mixing hard carbon and mesocarbon microbeads. According to the lithium ion hybrid capacitor provided by the invention, the energy density can be close to 100Wh / Kg, the power pulse is 10s, the Imax is close to 140C, the cycle life is longer than 100000 times, the current mainstream lithium ion capacitor and high-power battery application scenarios can be fully covered, and the blank of products with high energy density and high power performance is filled.

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.

An aerosol provision device for providing an aerosol during a puff on the aerosol provision device is disclosed. The aerosol provision device comprises at least one power source comprising at least one supercapacitor configured to supply electrical power to at least one aerosol generator for generating the aerosol from aerosol- generating material. The at least one supercapacitor is a lithium-ion capacitor, LIC, comprising an anode and a cathode, wherein said anode and / or said 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 method for manufacturing a lithium ion capacitor (1) includes a step (S11) in which doping is performed at a first doping current value, and a step (S12) in which doping is performed at a second doping current value. In the step (S11) in which doping is performed at a first doping current value, doping is performed at a first doping current value of 0.05 C or more and 0.2 C or less from the beginning of doping. In the step (S12) of doping at a second doping current value, doping is performed at the second doping current value having a C-rate higher than that of the first current value.

The invention provides a lithium ion capacitor lithium pre-embedding process waste recovery device and method, and the device comprises an oxidation unit, an activated carbon adsorption unit and a drying regeneration unit which are connected in sequence, the oxidation unit is provided with a carrier gas inlet, a carrier gas outlet, a production waste inlet and outlet door and a laminate for placing production waste, an air passage is arranged on the shelf board; an activated carbon adsorption unit, wherein an adsorption filter element is arranged in the activated carbon adsorption unit; and the drying regeneration unit is filled with a drying agent. By adopting the technical scheme disclosed by the invention, the waste material in the lithium pre-embedding process of the lithium ion capacitor is recycled, so that the potential safety hazard in the production process of the lithium ion capacitor can be avoided, and the recycling efficiency of the lithium element reaches 80% or above; after the waste lithium ion capacitor and the lithium ion battery are treated, the lithium element contained in the negative electrode material can be recycled, and the treatment process is safe, environment-friendly and environment-friendly.

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 invention belongs to the technical field of supercapacitors, and discloses an all-carbon lithium ion hybrid capacitor based on a coal-based carbon material and a preparation method thereof.The all-carbon lithium ion hybrid capacitor comprises a negative pole piece, a positive pole piece and a diaphragm containing electrolyte, the negative pole piece, the diaphragm containing the electrolyte and the positive pole piece are sequentially assembled into an integral structure; active materials of the positive pole piece and the negative pole piece are coal-based porous carbon materials; and the negative pole piece is a negative pole piece subjected to pre-lithiation. Active materials of the positive pole piece and the negative pole piece are coal-based porous carbon materials, so that the positive pole piece and the negative pole piece are easily matched with capacity and power characteristics of the positive pole and the negative pole, and the electrochemical performance of the carbon materials can be well exerted. Compared with positive and negative electrode materials of a current commercial lithium ion capacitor, the coal-based material is low in price, and the cost of the lithium ion capacitor can be remarkably reduced.

The invention provides starch-based porous carbon, a preparation method and application in a lithium ion capacitor. The starch-based porous carbon is prepared by taking starch as a precursor, KOH as an activating agent and a nitrogen source or a phosphorus source as a doping agent. According to the porous carbon positive electrode material prepared from the starch-based porous carbon, the energy density of the LIC in a voltage interval of 1.0-4.2 V can reach 110-124 Wh / kg; after 100 times of charge-discharge cycles, the capacity retention ratio of the LIC can reach 82%, and the LIC shows excellent energy density and cycling stability, and has a remarkable cost performance advantage in the field of energy storage.

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 relates to a key technology of a lithium ion capacitor electrolyte and an electrolyte additive. The electrochemical performance of the lithium ion capacitor electrolyte can be effectively improved. The invention mainly relates to an electrolyte additive prepared from lithium halide, diatomite, graphite powder, urethane acrylate and an acrylic monomer, and a mixed electrolyte prepared from the additive and a common electrolyte containing lithium hexafluorophosphate, ethylene carbonate and dimethyl carbonate. The lithium capacitor electrolyte additive can effectively reduce the internal resistance of the electrolyte, and the cycle capacity and retention rate of the lithium capacitor can be effectively improved by adopting the electrolyte.

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.

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

A nonaqueous electrolyte solution for a secondary battery, which contains a first compound represented by formula (1), a second compound represented by formula (2), a nonaqueous solvent, and an electrolyte. # imgabs0 #

The invention belongs to the technical field of energy storage materials, and relates to a preparation method of modified titanium niobate and application of the modified titanium niobate in a lithium ion capacitor, and the preparation method comprises the following steps: S1) under the protection of inert atmosphere, co-dissolving niobium salt, titanium salt, vanadium salt, molybdenum salt, aluminum salt and zirconium salt in alcohol to form a mixed solution, sequentially carrying out microwave treatment, drying and calcining on the mixed solution to obtain doped titanium niobate particles; the material meets the requirement that the molar ratio of Nb to Ti is 1.95: 1 to 2.05: 1; and S2) carrying out pulse nitriding treatment on the doped titanium niobate particles by adopting NH3 / H2 mixed gas to obtain the modified titanium niobate particles. Through Mo / V / Al / Zr multi-element synergistic doping, N gradient doping and a pulse optimization process, the optimization limitation of a traditional single doping performance index is improved, and meanwhile, the high rate capability and the cycle life of the lithium ion capacitor are improved.

The invention provides an MOF loaded red phosphorus lithium ion capacitor negative electrode material, a preparation method thereof and a lithium ion capacitor. The MOF loaded red phosphorus lithium ion capacitor negative electrode material comprises MOF and red phosphorus loaded in pores of the MOF; wherein the load rate of the red phosphorus on the MOF is 15-25%. An MOF precursor is used as a carrier, and the structure advantages of high porosity and large specific surface area are achieved; a rich loading space is provided for red phosphorus, the volume change of the red phosphorus in a lithium ion intercalation and deintercalation process can be effectively buffered, and the cycling stability of the red phosphorus serving as a negative electrode material is remarkably improved.

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 present invention relates to the technical field of energy storage components, and specifically discloses a super lithium-ion capacitor module, which includes a plurality of supercapacitors. The module further includes: a plurality of upper fixing frames; a plurality of lower fixing frames; a connecting rod; a connecting member one; a connecting member two; a lower shell. In the present invention, adjacent two supercapacitors are connected by the connecting member one and the connecting member two on adjacent two upper fixing frames. The connection mode of the connecting member one and the connecting member two is a combined connection. The connection is realized by inserting a sleeve plate in the connecting member two into a slot on the connecting member one, and the connecting member one and the connecting member two are disconnected by pulling out the sleeve plate from the slot. In this way, it is more convenient to disassemble and assemble the supercapacitors, improving the replacement efficiency of the supercapacitors. Moreover, when replacing the supercapacitors, other supercapacitors are not easily damaged.

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.

The invention discloses a method for eliminating lithium precipitation on the surface of a negative electrode of a lithium ion capacitor, and belongs to the technical field of lithium ion capacitors, and the method comprises the following steps: 1, adjusting a lithium precipitation monomer to be in an SOC state of-100% to 0%; step 2, adding an additive accounting for 0.01-10% of the injection mass of the original electrolyte into the monomer, and standing for 1-30 days; step 3, adjusting the voltage of the single body to 50%-200% of the SOC state, and quenching the additive; and step 4, carrying out degas operation on the monomers. By adopting the method, lithium precipitated on the surface of the negative electrode can be effectively eliminated, potential safety hazards caused by the lithium can be eliminated, and the additive activates the lithium precipitated on the surface of the negative electrode and returns to the positive electrode after being oxidized on the surface of the positive electrode, so that the potential of the negative electrode can be reduced, the monomer capacity is improved, and the cycling stability of the monomer is recovered.

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.

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 discloses a lithium ion capacitor positive electrode material, a preparation method thereof and a lithium ion capacitor adopting the positive electrode material, the positive electrode material is an active carbon material, the active carbon material has a spherical porous structure, a part of carbon spheres are collapsed, the BET specific area is 300-1000m < 2 > / g, and the active carbon material is a porous spherical material rich in mesoporous structures. Compared with the prior art, the method has the advantages that high-content moisture brought in in the spraying process, sodium hydroxide in the papermaking black liquid, sodium oxide generated by decomposing sodium salt and high temperature are utilized at the same time, and carbonization and activated pore-forming of the papermaking black liquid can be achieved in one step in the high-temperature pyrolysis process; the active carbon material with high specific surface area and abundant pores is obtained. The active carbon is used as a positive electrode to prepare the lithium ion capacitor with high energy density.