A preparation method of graphene-based button-type supercapacitor with low internal resistance and high specific energy

A supercapacitor, graphene-based technology, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor separators, hybrid capacitor electrodes, etc., can solve the problems of high contact resistance, limited cycle life, low specific energy, etc., to achieve high Effects of specific capacity, low internal resistance, and reduced internal resistance

Active Publication Date: 2019-01-22
芜湖洛菲斯企业管理咨询有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of high contact resistance, low specific energy, and limited cycle life of button-type supercapacitors, and proposes a preparation method for a new button-type supercapacitor. Contact resistance, specific energy and other performances of type supercapacitors

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  • A preparation method of graphene-based button-type supercapacitor with low internal resistance and high specific energy

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Experimental program
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Effect test

Embodiment A

[0025] A kind of preparation method of low internal resistance, high specific energy graphene-based button type supercapacitor, it is characterized in that, described preparation method adopts the following steps:

[0026] 1. Electrode preparation

[0027] ①. Taking materials: weighing activated carbon, graphene a, conductive carbon black, and binder a according to the mass ratio of 80:10:5:5, and mixing after weighing to obtain mixed raw materials;

[0028] ②. Dispersion: Put the mixed raw materials in a high-speed powder shear disperser, and uniformly mix them at a temperature of 60°C and a shear speed of 4000 rpm to obtain mixed particles;

[0029] ③.Rolling: Roll the mixed particles at 100°C, control the thickness of the electrode sheet by controlling the gap between the rollers, and obtain the electrode sheet after two times of horizontal and vertical rolling;

[0030] ④. Stamping: Die the obtained electrode sheet to obtain positive and negative electrode sheets.

[003...

Embodiment B

[0044] A kind of preparation method of low internal resistance, high specific energy graphene-based button type supercapacitor, it is characterized in that, described preparation method adopts the following steps:

[0045] 1. Electrode preparation

[0046] ①. Taking materials: weighing activated carbon, graphene a, conductive carbon black, and binder a according to the mass ratio of 75:15:3:7, and mixing after weighing to obtain mixed raw materials;

[0047] ②. Dispersion: Put the mixed raw materials in a high-speed powder shear disperser, and uniformly mix them at a temperature of 90°C and a shear speed of 5000 rpm to obtain mixed particles;

[0048] ③.Rolling: Roll the mixed particles at 120°C, control the thickness of the electrode sheet by controlling the gap between the rollers, and obtain the electrode sheet after two times of horizontal and vertical rolling;

[0049] ④. Stamping: Die the obtained electrode sheet to obtain positive and negative electrode sheets.

[005...

Embodiment C

[0063] A kind of preparation method of low internal resistance, high specific energy graphene-based button type supercapacitor, it is characterized in that, described preparation method adopts the following steps:

[0064] 1. Electrode preparation

[0065] ①. Taking materials: weighing activated carbon, graphene a, conductive carbon black, and binder a according to the mass ratio of 70:20:5:5, and mixing after weighing to obtain mixed raw materials;

[0066] ②. Dispersion: Put the mixed raw materials in a high-speed powder shear disperser, and mix them uniformly at a temperature of 60°C and a shear speed of 5000 rpm to obtain mixed particles;

[0067] ③.Rolling: Roll the mixed particles at 130°C, control the thickness of the electrode sheet by controlling the gap between the rollers, and obtain the electrode sheet after two times of horizontal and vertical rolling;

[0068] ④. Stamping: Die the obtained electrode sheet to obtain positive and negative electrode sheets.

[006...

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Abstract

The invention provides a preparation method for a low-internal-resistance and high-specific-energy graphene-based button type supercapacitor. The preparation method is characterized in that the low-internal-resistance and high-specific-energy graphene-based button type supercapacitor is prepared by the procedures of preparation of an electrode, preparation of a conductive glue solution, preparation of the button type supercapacitor and the like. By adding graphene, the preparation of the low-internal-resistance and high-specific-energy graphene-based button type supercapacitor is realized and the preparation process of the supercapacitor is lowered; by adding graphene to the electrode and the conductive glue in a powder state and in a liquid state, an adverse phenomenon of graphene agglomeration is avoided consequently; meanwhile, by introducing the high-conductivity and high-purity graphene material to the preparation process of the button type supercapacitor, the specific capacity of the supercapacitor is improved, and the internal resistance value of the supercapacitor is also lowered; and in addition, water content is not added in the electrode preparation process, so that internal electrode corrosion and generation of gas of the supercapacitor can be avoided.

Description

technical field [0001] The invention relates to a method for preparing a supercapacitor, in particular to a method for preparing a graphene-based button-type supercapacitor with low internal resistance and high specific energy. Background technique [0002] At present, the button-type supercapacitor is a new type of high-efficiency energy storage device, which has the advantages of short current response time, large charge and discharge current, high charge and discharge efficiency, wide operating temperature range, long cycle life and environmental protection, making it in It has been widely used in industrial electronics, consumer electronics, UPS, electric toys, driving recorders and other fields. At this stage, the button-type supercapacitor is mainly prepared by the following process: the conductive glue is added dropwise on the inside of the positive and negative shells, and then the positive and negative electrodes of a certain size are bonded to the shell, and the po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/84H01G11/86H01G11/36H01G11/52
CPCY02E60/13
Inventor 李权
Owner 芜湖洛菲斯企业管理咨询有限公司
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