13 results about "Lithium-ion capacitor" patented technology

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 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.

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.

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.

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 present invention relates to the technical field of energy storage components. Specifically disclosed is a super lithium ion capacitor module, comprising a plurality of super capacitors. The module further comprises a plurality of upper fixing frames; a plurality of lower fixing frames; connecting rods; first connecting members; second connecting members; and a lower housing. In the present invention, two adjacent super capacitors are connected by means of the connection of one first connecting member and one second connecting member on two adjacent upper fixing frames, the first connecting member and the second connecting member are connected in a combined manner, the connection is achieved by inserting a sleeve plate in the second connecting member into a slot in the first connecting member, and the first connecting member and the second connecting member are disconnected by pulling the sleeve plate out of the slot, such that the super capacitor is convenient to dismount and mount, the replacement efficiency of the super capacitor is improved, and other super capacitors are not prone to damage when the super capacitor is replaced.

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.

This invention belongs to the field of lithium-ion capacitor technology, specifically relating to a lithium-ion capacitor with a porous carbon positive electrode and a hard carbon negative electrode, and its preparation method. Pretreated coal powder and KOH powder are carbonized in a tube furnace at a mass ratio of 1:(3~5) to obtain porous carbon as the positive electrode material; the pretreated coal powder is carbonized in a tube furnace at 1200~1600℃ to obtain hard carbon as the negative electrode material; the positive and negative electrode materials are assembled at a mass ratio of (1~3):1 to obtain a lithium-ion capacitor with good electrical performance. The porous carbon prepared by this invention has a hierarchical pore structure, high specific surface area, and suitable defect density, providing high specific capacitance; the hard carbon prepared by this invention has a composite structure of short-range ordered graphite-like microcrystals and amorphous carbon, which is conducive to rapid lithium-ion insertion / extraction, providing a capacity basis; the appropriate assembly ratio of the porous carbon positive electrode material and the hard carbon negative electrode material effectively improves the overall performance of the lithium-ion capacitor.

The application discloses a high-voltage direct output type lithium ion capacitor energy storage device and a preparation method thereof, and belongs to the technical field of electrochemical energy storage devices. The energy storage device adopts double-side heteropolar composite electrodes and diaphragms to form an internal series structure with 50-380 layers, directly realizing high-voltage direct output of 800V or above, and not needing external module series-parallel connection. The preparation method comprises electrode preparation, electrochemical prelithiation, lossless lamination and edge full encapsulation insulation, and perfectly reuses the complete set of core processes of S01-S03. The whole package energy density of the application can reach 70-80Wh / kg, which is 8-10 times of that of a traditional super capacitor, the cycle life is greater than or equal to 100,000 times, the system cost is reduced by more than 40%, and the application perfectly adapts to the needs of power grid area energy storage, industrial high-voltage standby and other scenes.

The invention relates to a lithium ion capacitor anode material pre-lithiation method based on direct contact of a lithium foil, which comprises the following steps: calculating the required area of the lithium foil according to the type of the lithium ion capacitor anode material, the lithium intercalation capacity and the thickness of the lithium foil; cutting the lithium foil according to the required area, and completely covering the lithium foil on the surface of the anode plate; the anode strip covered with the lithium foil is rolled, and it is ensured that the lithium foil is completely attached to the surface of the anode strip; adding a preset amount of electrolyte into the rolled anode plate, and sealing; fully standing the sealed anode strip to ensure that the lithium foil completely reacts and is completely pre-lithiated; and cleaning the pre-lithiated anode plate to finally obtain the pre-lithiated anode of the lithium ion capacitor. Compared with the prior art, a direct contact pre-lithiation method is adopted, and diaphragm-free anode pre-lithiation can be achieved through the self-discharge process.

The present application relates to the technical field of lithium ion capacitor formation, in particular to a soft package lithium ion capacitor dynamic pulse width electric pulse pressure matching formation method, comprising: obtaining real-time internal pressure data and real-time electrical response data in the formation process of the soft package lithium ion capacitor; according to the two kinds of real-time data, calculating a dynamic pulse width control signal through an improved triangular carrier pulse width modulation algorithm, and generating a dynamic pressure compensation factor according to the real-time internal pressure data; combining the dynamic pulse width control signal and the dynamic pressure compensation factor to generate a dynamic matching electric pulse signal, and applying it to the soft package lithium ion capacitor drive formation reaction. The method realizes dynamic adaptation of electric pulse and formation process pressure, makes the formation reaction more uniform, reduces the damage to the internal structure of the capacitor, and improves the stability of the formation reaction and the consistency of the electrochemical performance of the capacitor.