CN112713002A - Lithium ion capacitor and preparation method thereof - Google Patents

Lithium ion capacitor and preparation method thereof Download PDF

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Publication number
CN112713002A
CN112713002A CN202110052943.9A CN202110052943A CN112713002A CN 112713002 A CN112713002 A CN 112713002A CN 202110052943 A CN202110052943 A CN 202110052943A CN 112713002 A CN112713002 A CN 112713002A
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positive
plate
negative
lithium ion
shell
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隋竹银
朱晓明
李永鹏
裴子媛
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Yantai University
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Yantai University
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G5/00—Capacitors in which the capacitance is varied by mechanical means, e.g. by turning a shaft; Processes of their manufacture
    • H01G5/04—Capacitors in which the capacitance is varied by mechanical means, e.g. by turning a shaft; Processes of their manufacture using variation of effective area of electrode
    • H01G5/14—Capacitors in which the capacitance is varied by mechanical means, e.g. by turning a shaft; Processes of their manufacture using variation of effective area of electrode due to longitudinal movement of electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/04—Hybrid capacitors
    • H01G11/06—Hybrid capacitors with one of the electrodes allowing ions to be reversibly doped thereinto, e.g. lithium ion capacitors [LIC]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/22—Electrodes
    • H01G11/24—Electrodes characterised by structural features of the materials making up or comprised in the electrodes, e.g. form, surface area or porosity; characterised by the structural features of powders or particles used therefor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/22—Electrodes
    • H01G11/26—Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features
    • H01G11/28—Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features arranged or disposed on a current collector; Layers or phases between electrodes and current collectors, e.g. adhesives
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/22—Electrodes
    • H01G11/30—Electrodes characterised by their material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/54—Electrolytes
    • H01G11/58—Liquid electrolytes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/54—Electrolytes
    • H01G11/58—Liquid electrolytes
    • H01G11/60—Liquid electrolytes characterised by the solvent
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/84—Processes for the manufacture of hybrid or EDL capacitors, or components thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G5/00—Capacitors in which the capacitance is varied by mechanical means, e.g. by turning a shaft; Processes of their manufacture
    • H01G5/01—Details
    • H01G5/011—Electrodes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/13—Energy storage using capacitors

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)

Abstract

The invention relates to a lithium ion capacitor and a preparation method thereof.A moving part is arranged on a positive plate, so that the positive plate and a negative plate can move relatively, the relative area of the positive plate and the negative plate is changed, the capacitance value of the lithium ion capacitor is adjusted within a certain range, and the applicability of the capacitor is improved. Meanwhile, the positive and negative plates of the capacitor and the electrolyte are improved, so that the output efficiency of the capacitor is improved, and safer and more stable charging and discharging are realized.

Description

Lithium ion capacitor and preparation method thereof
Technical Field
The invention relates to the technical field of electrochemical energy storage, in particular to a lithium ion capacitor and a preparation method thereof.
Background
With the development and utilization of efficient and clean renewable energy sources such as solar energy, wind energy, tidal energy, biomass energy and the like, the lithium ion capacitor is more and more widely applied as a key for storage and conversion of new energy sources.
The lithium ion capacitor is a novel energy storage device, can provide high energy density, but in the in-service use process, the lithium ion capacitor often has fixed capacitance value, can't satisfy the application scene that needs the capacitance variation, brings inconvenience for the user.
Disclosure of Invention
The invention aims to provide a lithium ion capacitor and a preparation method thereof, which can adjust the capacitance within a certain small range and meet the actual use requirement.
In order to achieve the purpose, the invention provides the following scheme:
a lithium ion capacitor, the capacitor comprising:
the electrode plate group comprises a positive plate and a negative plate, the positive plate and the negative plate are spirally coiled and stacked by taking an axial core as a center, and a gap is formed between the positive plate and the negative plate;
the shaft core is positioned in the center of the shell and fixedly connected with the top and the bottom of the shell;
the electrode plate group is arranged in the shell, electrolyte is filled in the shell, the negative plate is fixedly and electrically connected with the negative current collecting component at the bottom of the shell, and the positive plate is electrically connected with the positive current collecting component at the top of the shell;
the positive plate is provided with a moving member, the moving member extends out of the top of the shell, and the moving member and the shell are in movable sealing.
Optionally, the invention further provides a preparation method of the lithium ion capacitor, and the method includes:
preparing a positive electrode: uniformly mixing a positive active material, a conductive agent, an adhesive and a dispersing agent, coating the mixture on a positive current collector, and performing vacuum drying and rolling to obtain a positive plate;
preparing a negative electrode: taking a spherical polyimide carbon material as a negative active material, uniformly mixing the negative active material, a conductive agent and a binder, coating the mixture on a negative current collector, and performing vacuum drying and rolling to obtain a negative plate;
arranging a moving part on the positive plate, enabling the moving part to penetrate through the top of the shell, and placing the positive plate and the negative plate into the shell in the mode of claim 1;
and packaging the shell to obtain the lithium ion capacitor.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention provides a lithium ion capacitor and a preparation method thereof, wherein a moving part is arranged on a positive plate of the capacitor, so that the relative position between the positive plate and a negative plate of the capacitor can be adjusted, the capacitance of the capacitor is changed, and the practicability of the lithium ion capacitor is improved. The negative plate coated with the nano-structure active material is adopted, so that the lithium ion capacitor has higher lithium ion intercalation/deintercalation speed, and the charge and discharge power of the lithium ion capacitor is improved; by adopting the electrolyte solution without highly flammable and volatile organic solvent, the cycle life and the safety of the lithium ion capacitor are improved. Meanwhile, the capacity ratio of the anode and the cathode is controlled within a reasonable range, the utilization rate of the electrode material is improved, and higher specific energy and specific power are achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic diagram of a vertical cross-sectional structure of a lithium ion capacitor provided in an embodiment of the present invention;
fig. 2 is a schematic cross-sectional structure diagram of a lithium ion capacitor provided in an embodiment of the present invention;
fig. 3 is a flowchart of a method for manufacturing a lithium ion capacitor according to an embodiment of the present invention.
Description of the symbols:
1-shell, 2-negative plate, 3-positive plate, 4-axial core and 5-moving piece.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a lithium ion capacitor and a preparation method thereof, which can adjust the capacitance value of the lithium ion capacitor within a certain range and improve the applicability of the capacitor.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Example 1
As shown in fig. 1, the present embodiment provides a lithium ion capacitor including:
the electrode plate assembly comprises a negative plate 2 and a positive plate 3, the positive plate 3 and the negative plate 2 are spirally coiled and stacked by taking an axial core as a center, and a gap is formed between the positive plate 3 and the negative plate 2;
the shaft core 4 is positioned in the center of the shell 1, and the shaft core 4 is fixedly connected with the top and the bottom of the shell 1;
the electrode plate group is arranged in a shell 1, electrolyte is filled in the shell 1, the negative plate 3 is fixedly and electrically connected with a negative current collecting component at the bottom of the shell, and the positive plate 2 is electrically connected with a positive current collecting component at the top of the shell;
and the positive plate 3 is provided with a moving member 5, the moving member 5 extends out of the top of the shell, and the moving member 5 and the shell 1 are in movable sealing.
For a clearer explanation of the lithium ion capacitor, fig. 1 shows a vertical sectional structure diagram of the lithium ion capacitor. The shape of the casing 1 is preferably a cylinder, but other shapes may also be used as the casing of the lithium ion capacitor in this embodiment, which is not limited by the present invention.
The shaft core 4 is fixed inside the housing 1, and the material of the shaft core 4 may be an insulating material such as polypropylene. The negative plate 2 and the positive plate 3 which are spirally coiled and stacked are arranged around the shaft core 4, the negative plate 2 is fixedly and electrically connected with the negative current collecting part at the bottom of the shell 1, the positive plate 3 is electrically connected with the positive current collecting part at the top of the shell 1, and the thickness of the positive plate 3 and the negative plate 2 is suitable for fixing the plates in a specific coiling and stacking state. When the device is used, the positive current collecting component and the negative current collecting component only need to be connected with an external device as required. The shaft core 4 can be fixedly connected with the negative plate 2, and plays a role in supporting the shell and assisting in fixing the negative plate.
Preferably, the positive and negative current collecting members are generally thin metal sheets adapted to the shape of the case, and are preferably nickel or nickel-plated copper materials. The positive and negative current collecting members may also be provided with pits or holes corresponding to the shape of the shaft core 4, so that the positive and negative current collecting members and the shaft core 4 are more convenient to mount and fix. And the negative electrode current collecting component can be provided with a groove for installing the negative plate 2, so that the molten metal can be ensured not to influence other positions of the negative electrode current collecting component during fixed connection (such as welding), and the safety performance of the lithium ion capacitor is ensured. As shown in fig. 2, the positive electrode plate 3 and the negative electrode plate 2 are arranged in a spirally wound manner, so that the relative area between the positive electrode plate 3 and the negative electrode plate 2 of the lithium ion capacitor can be increased, and a larger electric capacity can be realized in a limited space. And there is the clearance between positive plate 3 and the negative plate 2, the relative motion of the positive plate 3 of being convenient for, and guaranteed not contact between negative plate 2 and the positive plate 3. In the in-service use in-process, can also set up the diaphragm between positive plate 3 and negative plate 2 to avoid taking place the mistake between positive plate 3 and the negative plate 2 in the condenser use and touching, influence the safety in utilization of condenser.
On the positive electrode plate 3, a moving member 5 is further provided, and the moving member 5 protrudes from the top of the can 1, so that the positive electrode plate 3 can be moved up and down within the can 1 by moving the moving member 5. Because negative plate 2 is fixed in the casing bottom, when positive plate 3 reciprocated relatively, just realized the change of relative area between positive plate 3 and negative plate 2 to lithium ion capacitor's capacitance value has been changed. The moving member 5 is made of an insulating material, so that the use safety of the capacitor is ensured.
In order to adjust the capacitance value of the capacitor more accurately, the capacitance value of the capacitor when the positive plate 3 is located at different positions can be calculated according to a capacitance formula, and the corresponding capacitance value is marked on the moving member 5 in a scale form.
The case also needs to be filled with an electrolyte, and the electrolyte may fill the inside of the case 1 or may just pass through the negative electrode plate 2. To extend the useful life of the capacitor, the electrolyte in this example includes water, lithium bis (trifluoromethanesulfonylimide) and 1-ethyl-3-methylimidazolium bis (fluoromethylsulfonyl) imide in a molar ratio of 1: 2. Greatly reduced the content of water, abandoned highly easily fires, volatile solvent simultaneously for but the cycle number greatly increased of condenser has greatly promoted stability and life that the condenser used. In order to ensure that the electrolyte does not leak, the movable part 5 and the shell 1 are in movable sealing, and when a sealing material is selected, a material which has good compactness, is not easy to leak media, has good compressibility and rebound resilience, has small permanent deformation, and is wear-resistant and corrosion-resistant should be preferred.
The positive plate 3 in this embodiment includes a positive current collector and a positive conductive coating coated on the positive current collector, the positive conductive coating includes a positive active material, a conductive agent, a binder and a dispersant, and a mass ratio of the positive active material, the conductive agent, the binder and the dispersant is 85.0: 9.0: 3.7: 2.3. And a conductive bonding layer is also arranged between the positive current collector and the positive conductive coating, and is a composition formed by mixing carbon particles, a dispersing agent, a binder and ion exchange water. The conductive adhesive layer contains carbon particles, so that the electrode strength of the electrode plate of the lithium ion capacitor can be improved, the internal resistance of the lithium ion capacitor can be reduced, and the output density of the capacitor can be improved. The carbon particles can be graphite, acetylene black, carbon fibers or carbon whiskers, and the purpose of improving the output efficiency of the capacitor is achieved through the carbon particles filled with the conductive adhesive layer in high density. Therefore, the present embodiment provides a conductive adhesive layer that can be disposed on the negative electrode plate 2 between the negative electrode current collector and the negative electrode conductive coating, in addition to the positive electrode plate 3, thereby further improving the output density of the capacitor.
And the negative electrode conductive coating of the negative electrode plate 2 includes a negative electrode active material, a conductive agent, and a binder. The negative pole active material is ball-type polyimide carbon material, and the particle diameter of material is less, and lithium ion can be quick imbed in the material inside, deviate from, and the ball-type structure of material is convenient for lithium ion from each direction business turn over of sphere, has improved lithium ion capacitor's heavy current charge-discharge ability greatly, and the structure of positive plate 3 and negative plate 2 in this embodiment is for rolling up the setting, and the chooseing of ball-type material can adapt to the circulation of the lithium ion between the positive plate 3 of different radians and the negative plate 2 to the charge-discharge efficiency of condenser has been guaranteed. In order to facilitate the fixed connection of the negative plate 2 and the bottom of the shell 1, the negative plate 2 comprises a part which is not coated with a negative conducting layer, and the uncoated part is arranged at one end of the negative plate 2 connected with the shell 1. And the other end of the negative electrode plate 2 can be completely coated with a negative conductive layer, thereby improving the electron exchange efficiency between the negative electrode plate 2 and the positive electrode plate 3.
In addition, the capacity ratio of the positive electrode and the negative electrode of the lithium ion capacitor affects the performance of the capacitor, when the capacity of the positive electrode is insufficient, the number of electrode pairs in the electrode is reduced due to the excessive amount of the negative electrode active material, so that the capacity of the capacitor is reduced; on the contrary, the capacity of the negative electrode is insufficient, and the negative electrode is overcharged, so that polarization is likely to occur, and the capacity of the negative electrode material is affected. Therefore, the mass ratio of the positive electrode active material to the negative electrode active material is controlled to be 0.8 to 1.2, so that the capacity of the capacitor can be utilized to the maximum extent, and the output efficiency of the capacitor can be improved.
In order to facilitate the use of the capacitor, a lithium support member electrically connected to the negative current collecting member is disposed in the case 1, the lithium support member includes a copper mesh and thin plate-shaped metal lithium pressed on the copper mesh, and the lithium support member is electrically connected to the negative current collecting member, so that lithium ions can be adsorbed in the negative active material on the negative electrode plate 2, thereby facilitating the activation of the lithium ion capacitor.
Example 2
The embodiment provides a method for preparing a lithium ion capacitor, as shown in fig. 3, the method includes:
step 101: preparing a positive electrode: uniformly mixing a positive active material, a conductive agent, an adhesive and a dispersing agent, coating the mixture on a positive current collector, and performing vacuum drying and rolling to obtain a positive plate 3;
step 102: preparing a negative electrode: taking a spherical polyimide carbon material as a negative active material, uniformly mixing the negative active material, a conductive agent and a binder, coating the mixture on a negative current collector, and performing vacuum drying and rolling to obtain a negative plate 2;
step 103: arranging a moving part 5 on the positive plate, enabling the moving part 5 to extend out of the top of the shell, arranging a dynamic sealing mode between the moving part and the shell 1, and placing the positive plate and the negative plate into the shell 1 according to the mode of claim 1;
step 104: and packaging the shell 1 to obtain the lithium ion capacitor.
The emphasis of each embodiment in the present specification is on the difference from the other embodiments, and the same and similar parts among the various embodiments may be referred to each other. For the method disclosed by the embodiment, the method corresponds to the product disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the product part for description.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.

Claims (10)

1. A lithium ion capacitor, characterized in that the capacitor comprises:
the electrode plate group comprises a positive plate and a negative plate, the positive plate and the negative plate are spirally coiled and stacked by taking an axial core as a center, and a gap is formed between the positive plate and the negative plate;
the shaft core is positioned in the center of the shell and fixedly connected with the top and the bottom of the shell;
the electrode plate group is arranged in the shell, electrolyte is filled in the shell, the negative plate is fixedly and electrically connected with the negative current collecting component at the bottom of the shell, and the positive plate is electrically connected with the positive current collecting component at the top of the shell;
the positive plate is provided with a moving member, the moving member extends out of the top of the shell, and the moving member and the shell are in movable sealing.
2. The lithium ion capacitor of claim 1, wherein the electrolyte comprises water, lithium bistrifluoromethanesulfonimide, and 1-ethyl-3-methylimidazolium bis (fluoromethylsulfonyl) imide, and the molar ratio of the water, the lithium bistrifluoromethanesulfonimide, and the 1-ethyl-3-methylimidazolium bis (fluoromethylsulfonyl) imide is 1: 2.
3. The lithium ion capacitor of claim 1, wherein the positive plate comprises a positive current collector and a positive conductive coating coated on the positive current collector, and the positive conductive coating comprises a positive active material, a conductive agent, a binder and a dispersant.
4. The lithium ion capacitor of claim 3, wherein the positive plate further comprises a conductive adhesive layer between the positive current collector and the positive conductive coating, wherein the conductive adhesive layer is a mixture of carbon particles, a dispersant, a binder and ion-exchanged water.
5. The lithium ion capacitor of claim 3, wherein the mass ratio of the positive electrode active material, the conductive agent, the binder and the dispersant is 85.0: 9.0: 3.7: 2.3.
6. The lithium ion capacitor of claim 3, wherein the negative electrode plate comprises a negative electrode current collector and a negative electrode conductive coating coated on the negative electrode current collector, the negative electrode conductive coating comprises a negative electrode active material, a conductive agent and a binder, and the negative electrode active material is a spherical polyimide carbon material.
7. The lithium ion capacitor according to claim 6, wherein the mass ratio of the positive electrode active material to the negative electrode active material is 0.8 to 1.2.
8. The lithium ion capacitor according to claim 1, wherein a separator is provided between the positive electrode plate and the negative electrode plate.
9. The lithium ion capacitor according to claim 1, further comprising a lithium support member electrically connected to the negative current collecting member, wherein the lithium support member comprises a copper mesh and a thin plate-like lithium metal laminated on the copper mesh.
10. A method of making a lithium ion capacitor, the method comprising:
preparing a positive electrode: uniformly mixing a positive active material, a conductive agent, an adhesive and a dispersing agent, coating the mixture on a positive current collector, and performing vacuum drying and rolling to obtain a positive plate;
preparing a negative electrode: taking a spherical polyimide carbon material as a negative active material, uniformly mixing the negative active material, a conductive agent and a binder, coating the mixture on a negative current collector, and performing vacuum drying and rolling to obtain a negative plate;
arranging a moving part on the positive plate, enabling the moving part to penetrate through the top of the shell, and placing the positive plate and the negative plate into the shell in the mode of claim 1;
and packaging the shell to obtain the lithium ion capacitor.
CN202110052943.9A 2021-01-09 2021-01-09 Lithium ion capacitor and preparation method thereof Pending CN112713002A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023070872A1 (en) * 2021-10-29 2023-05-04 海南大学 Negative-electrode-free zinc ion hybrid capacitor and preparation method therefor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104409223A (en) * 2014-11-21 2015-03-11 中国科学院青岛生物能源与过程研究所 Lithium ion capacitor cathode piece and lithium ion capacitor using cathode pieces
CN105390298A (en) * 2015-12-11 2016-03-09 中航锂电（洛阳）有限公司 Lithium ion capacitor negative unit, cell and lithium ion capacitor
CN109428126A (en) * 2017-08-30 2019-03-05 丰田自动车株式会社 Aqueous electrolyte and aquo-lithium ion secondary cell
CN210073621U (en) * 2019-08-05 2020-02-14 东营盛源电气科技有限公司 Automatic heat dissipation low-voltage capacitor
JP2021034402A (en) * 2019-08-15 2021-03-01 日本電子株式会社 Variable capacitor and nmr probe

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104409223A (en) * 2014-11-21 2015-03-11 中国科学院青岛生物能源与过程研究所 Lithium ion capacitor cathode piece and lithium ion capacitor using cathode pieces
CN105390298A (en) * 2015-12-11 2016-03-09 中航锂电（洛阳）有限公司 Lithium ion capacitor negative unit, cell and lithium ion capacitor
CN109428126A (en) * 2017-08-30 2019-03-05 丰田自动车株式会社 Aqueous electrolyte and aquo-lithium ion secondary cell
CN210073621U (en) * 2019-08-05 2020-02-14 东营盛源电气科技有限公司 Automatic heat dissipation low-voltage capacitor
JP2021034402A (en) * 2019-08-15 2021-03-01 日本電子株式会社 Variable capacitor and nmr probe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023070872A1 (en) * 2021-10-29 2023-05-04 海南大学 Negative-electrode-free zinc ion hybrid capacitor and preparation method therefor

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Application publication date: 20210427