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High-power lithium-cathode-intercalated hybrid asymmetric super-capacitor pole piece and manufacturing method thereof

A technology for supercapacitors and manufacturing methods, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, hybrid capacitors, etc., can solve problems such as increased safety concerns, battery heating, etc. area, the effect of increasing the instant contact area

Inactive Publication Date: 2012-07-25
长沙亚科新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With so many advantages, the frequent explosion and fire accidents of lithium-ion batteries used in electric vehicles have increased people's concerns about their safety, and how to solve the problem of battery heating during high-rate discharge is also very difficult

Method used

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  • High-power lithium-cathode-intercalated hybrid asymmetric super-capacitor pole piece and manufacturing method thereof
  • High-power lithium-cathode-intercalated hybrid asymmetric super-capacitor pole piece and manufacturing method thereof
  • High-power lithium-cathode-intercalated hybrid asymmetric super-capacitor pole piece and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0020] A metal aluminum mesh with a width of 300mm and a thickness of 0.1mm is used as the current collector of the electrode active material, wherein the width of the mesh area is 260mm, and a 20mm non-porous area is reserved on each side. Then the metal aluminum mesh is treated as follows, adding a strong basic anionic surfactant, using ultrasonic technology to decontaminate the surface of the current collector for 1.5min, washing it with secondary deionized water and then vacuuming it at 80°C After drying for 10 minutes, the current collector was surface-modified with a fluorine-containing surfactant for 4 minutes.

[0021] The conductive adhesive is applied once, and the treated metal mesh is coated with conductive adhesive. The thickness of the wet film on one side of the conductive adhesive is 15 μm.

[0022]For the second coating of activated carbon, when preparing the electrode active material slurry, first add 8g of carbon nanotubes to 150ml of absolute ethanol, ...

Embodiment example 2

[0028] Replace the carbon nanotubes in Example 1 with carbon nanofibers. The conditions for slurry mixing, pole piece fabrication, and battery assembly and testing are the same as those in Example 1. 10A charge and discharge, the voltage operating window is 2.0V-3.8V, the internal resistance of the supercapacitor is 0.55mΩ, and the electrostatic capacity is 2100F.

Embodiment example 3

[0030] The carbon nanotubes in Embodiment 1 are replaced by a mixture of carbon nanofibers and carbon nanotubes, and the sum of the masses of the two remains unchanged. The conditions for slurry mixing, pole piece fabrication, and battery assembly and testing are the same as those in Example 1. 10A charge and discharge, the internal resistance of the supercapacitor is 0.49mΩ, the voltage operation window is 2.0V-3.8V, and the electrostatic capacity is 2100F.

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Abstract

The invention discloses a high-power lithium-cathode-intercalated hybrid asymmetric super-capacitor pole piece and a manufacturing method of the high-power lithium-cathode-intercalated hybrid asymmetric super-capacitor pole piece, which belongs to new energy material technology and relative field; high-power charging / discharging capacity of a hybrid asymmetric super-capacitor is enhanced effectively; after lithium is led to cathode, a potential window of the hybrid asymmetric super-capacitor is widened; energy density of the super-capacitor is increased effectively; finally, the super-capacitor is encapsulated by soft package; production efficiency of the super-capacitor is also increased greatly; and production cost is reduced.

Description

technical field [0001] The invention relates to a high-power lithium-intercalated negative electrode hybrid asymmetric supercapacitor pole piece, in particular, carbon nanofibers and / or carbon nanotubes are introduced into the positive electrode active material, which improves the power density of the hybrid asymmetric supercapacitor, and the lithium battery positive electrode material LiCoO 2 The addition of graphite intercalates lithium in the negative electrode material, and at the same time reduces the potential of the negative electrode material to 0.21V (VS.Li / Li+), which broadens the operating potential window of the hybrid asymmetric supercapacitor. It belongs to the field of new energy technology. Background technique [0002] Electrochemical double layer capacitor (EDLC), also known as supercapacitor (supercapacitor), is a kind of device that uses the adsorption or desorption of electrochemical double layer or electrode material at the electrode / solution interface ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/058H01G11/04H01G11/50H01G11/86
Inventor 刘继波张耀伟黄浩宇
Owner 长沙亚科新能源科技有限公司
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