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High-specific-energy super capacitor negative pole sheet and preparation method thereof

A technology for supercapacitors and negative plates, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, etc. It can solve the problems of low specific energy of supercapacitors, achieve good power characteristics, increase specific energy, and high specific energy.

Inactive Publication Date: 2015-11-18
SHANGHAI INST OF SPACE POWER SOURCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of low specific energy of the existing supercapacitors, and provide a high specific energy supercapacitor negative plate. The supercapacitor prepared by using the negative plate can not only meet the requirements of the Hall electric propulsion system on the star. The power requirements of supercapacitors, and compared with the supercapacitors of the prior art, can greatly improve its specific energy, and well meet its power supply time and life requirements for supercapacitors

Method used

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  • High-specific-energy super capacitor negative pole sheet and preparation method thereof
  • High-specific-energy super capacitor negative pole sheet and preparation method thereof
  • High-specific-energy super capacitor negative pole sheet and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Step 1, put the binder in the solvent, stir well until it dissolves evenly;

[0031] Step 2, pour the conductive agent into the binder solution and stir thoroughly;

[0032] Step 3, pour the active material powder into the solution in the above step 2, and stir until a uniform slurry is formed; the active material is a mixture of activated carbon, natural graphite, and mesophase carbon microspheres, wherein the amount of activated carbon is based on the active material The mass percentage content is 5%, and the specific surface area is 1000~2000m 2 / g, the particle size is 5~20μm, and the mass ratio of natural graphite to mesophase carbon microspheres is 1:1;

[0033] Step 4, evenly coat the slurry on the current collector, and after drying, press to form an electrode sheet, which is the negative electrode sheet of the high specific energy supercapacitor of the present invention; the current collector is copper foil with a thickness of 10~ 15 μm.

[0034] Use the neg...

Embodiment 2

[0039] Step 1, put the binder in the solvent, stir well until it dissolves evenly;

[0040] Step 2, pour the conductive agent into the binder solution and stir thoroughly;

[0041] Step 3, pour the active material powder into the solution of the above step 2, fully stir until a uniform slurry is formed; the active material is a mixture of activated carbon, natural graphite, and hard carbon, wherein the amount of activated carbon is based on the mass of the active material. The component content is 20%, and the specific surface area is 1000~2000m 2 / g, the particle size is 5~20μm, and the mass ratio of natural graphite to hard carbon is 1:1;

[0042] Step 4, evenly coat the slurry on the current collector, and after drying, press to form an electrode sheet, which is the negative electrode sheet of the high specific energy supercapacitor of the present invention; the current collector is copper foil with a thickness of 10~ 15 μm.

[0043] The same method as in Example 1 is us...

Embodiment 3

[0045] Step 1, put the binder in the solvent, stir well until it dissolves evenly;

[0046] Step 2, pour the conductive agent into the binder solution and stir thoroughly;

[0047]Step 3, pouring the active material powder into the solution of the above step 2, fully stirring until a uniform slurry is formed; the active material is a mixture of activated carbon and natural graphite, wherein the amount of activated carbon is based on the mass percentage of the active material 50%, the specific surface area is 1000~2000m 2 / g, the particle size is 5~20μm;

[0048] Step 4, evenly coat the slurry on the current collector, and after drying, press to form an electrode sheet, which is the negative electrode sheet of the high specific energy supercapacitor of the present invention; the current collector is copper foil with a thickness of 10~ 15 μm.

[0049] Using the same method as in Example 1 to assemble a supercapacitor for testing, the test results show that the charge and disc...

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Abstract

The invention discloses a high-specific-energy super capacitor negative pole sheet and a preparation method thereof. The negative pole sheet includes an active material, a conductive agent, a binder and a current collector; a carbon material is selected as the active material of the negative pole sheet; the carbon material is composed of one or a plurality of kinds of substances selected from active carbon, natural graphite, artificial graphite, mesophase carbon micro beads, hard carbon and soft carbon. Compared with a traditional super capacitor, the super capacitor adopting the negative pole sheet of the invention has the advantages of greatly-improve specific energy, excellent power characteristics, long cycle life and the like.

Description

technical field [0001] The invention belongs to the field of chemical power sources, and relates to a chemical power source product, in particular to a high specific energy supercapacitor negative plate and a preparation method thereof. Background technique [0002] The invention relates to a new chemical power source - supercapacitor. Supercapacitor, also known as electrochemical capacitor, is a new type of energy storage device that has been developed rapidly in recent years. Supercapacitors store and release energy through the rapid and reversible charge adsorption / desorption process or electrochemical reaction process on the electrode surface. Its energy density is 10 to 100 times that of traditional electrostatic capacitors, and its power density is 10 to 100 times that of batteries. times. With its unique performance advantages, supercapacitors are especially suitable for short-term high-power output occasions, such as locomotive starting, UPS, energy recovery, laser...

Claims

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Application Information

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IPC IPC(8): H01G11/34H01G11/86
CPCY02E60/13
Inventor 杨晨许海洁郭向飞潘延林
Owner SHANGHAI INST OF SPACE POWER SOURCES
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