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Super electrochemical capacitor and preparation method thereof

An electrochemical and capacitor technology, applied in the field of capacitors, can solve the problems of low overall energy density, low capacity of carbon nanotubes, low energy density of capacitors, etc.

Active Publication Date: 2016-04-13
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the system takes advantage of the advantages of one-dimensional nanomaterials, the overall energy density of the system is not very high due to the low capacity of carbon nanotubes, resulting in low capacitor energy density and low specific capacitance of the capacitor.

Method used

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  • Super electrochemical capacitor and preparation method thereof
  • Super electrochemical capacitor and preparation method thereof

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preparation example Construction

[0031] Another object of the present invention is to provide the preparation method of above-mentioned super electrochemical capacitor, such as figure 2 shown, including the following steps:

[0032] S1. Graphene, the first conductive agent, and the first binder are configured as positive electrode active materials with a mass ratio of 80~93:2~10:5~10, and the mass ratio is 80~93:2~ 10:5-10 titanium dioxide nanowires, the second conductive agent and the second binder are configured as the negative electrode active material;

[0033] S2. Coating the positive electrode active material on an aluminum foil and drying it to obtain a positive electrode; coating the negative electrode active material on a copper foil and drying it to obtain a negative electrode;

[0034] S3. After cutting the positive electrode, negative electrode and separator into required specifications, cut them into required specifications, assemble them in the order of positive electrode / diaphragm / negative el...

Embodiment 1

[0045] 1. Super electrochemical capacitor electrode preparation:

[0046] positive electrode. Graphene with a mass ratio of 85:10:5 (with a specific surface area of ​​400m 2 / g), acetylene black conductive agent, and PVDF binder are mixed to make a positive electrode active material, and the positive electrode active material is coated on an aluminum foil, and baked at 80° C. for 12 hours in a vacuum to obtain a positive electrode;

[0047] negative electrode. TiO with a mass ratio of 85:10:5 2 (B) Nanowires, acetylene black conductive agent, and PVDF binder are mixed to make negative electrode active material, and the negative electrode active material is coated on copper foil, and baked in vacuum at 80° C. for 12 hours to obtain negative electrode.

[0048] Wherein, the mass ratio of the positive electrode active material on the positive electrode to the negative electrode active material on the negative electrode is 1:1.

[0049] 2. Assemble the super electrochemical ca...

Embodiment 2

[0052] 1. Super electrochemical capacitor electrode preparation:

[0053] positive electrode. Graphene with a mass ratio of 80:10:10 (specific surface area of ​​700m 2 / g), carbon nanotube conductive agent, and PVDF binder are mixed to make a positive electrode active material, and the positive electrode active material is coated on an aluminum foil, and baked in a vacuum at 80° C. for 12 hours to obtain a positive electrode;

[0054] negative electrode. TiO with a mass ratio of 80:10:10 2 (B) Nanowires, carbon nanotube conductive agent, and PVDF binder are mixed to make negative electrode active material, and the negative electrode active material is coated on copper foil, and baked in vacuum at 80° C. for 12 hours to obtain negative electrode.

[0055] Wherein, the mass ratio of the positive electrode active material on the positive electrode to the negative electrode active material on the negative electrode is 1:2.

[0056] 2. Assemble the super electrochemical capacit...

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Abstract

The invention belongs to the field of capacitors, and discloses a super electrochemical capacitor electrode and a super electrochemical capacitor. The super electrochemical capacitor electrode comprises a positive electrode and a negative electrode; the material of the positive electrode comprises aluminum foil, and positive electrode active material comprising grapheme, first conductive agent and first binding agent with the mass ratio being 85:10:5, which is coated on the aluminum foil; and the material of the negative electrode comprises aluminum foil, and negative electrode active material comprising titanium dioxide nanowire, second conductive agent and second binding agent with the mass ratio being 85:10:5, which is coated on the aluminum foil. As the negative electrode material of the super electrochemical capacitor electrode has a low potential plateau, and the positive electrode adopts the grapheme with large specific surface and good electric conductivity, the super electrochemical capacitor electrode can effectively reduce the internal resistance of the super electrochemical capacitor, and can also ensure that the super electrochemical capacitor forms high specific capacitance.

Description

technical field [0001] The invention belongs to the field of capacitors and relates to a super electrochemical capacitor. The invention also relates to a preparation method of the super electrochemical capacitor. Background technique [0002] In the 1990s, the development of electric vehicles and the need for power pulse power supplies further stimulated research on electrochemical capacitors. At present, the specific energy of electrochemical capacitors is still relatively low, and the specific power of batteries is low. People are trying to solve this problem from two aspects: (1) When batteries and supercapacitors are used in combination, during normal operation, the batteries provide the required energy. The power; when starting or needing a large current discharge, it is provided by a capacitor. On the one hand, it can improve the shortcoming of the battery’s poor low-temperature performance; it can solve the application of pulse current with high power requirements, s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/042H01G9/045
CPCY02E60/13
Inventor 周明杰钟玲珑王要兵
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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