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Porous electrode, preparation method thereof and application of porous electrode in aspect of preparing lithium ion capacitor and supercapacitor

A porous electrode and electrode technology, which is applied in the preparation of lithium ion capacitors, preparation of porous electrodes, and supercapacitors, can solve the problems of low electrode porosity, easy collapse, and uneven distribution of voids, etc., and achieve high electrode performance. Low cost, the effect that the gap is not easy to collapse

Active Publication Date: 2015-02-04
深圳博磊达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

[0005] The purpose of the present invention is to provide a porous electrode to solve the problems of low porosity, uneven distribution of voids and easy collapse of existing electrodes

Method used

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  • Porous electrode, preparation method thereof and application of porous electrode in aspect of preparing lithium ion capacitor and supercapacitor
  • Porous electrode, preparation method thereof and application of porous electrode in aspect of preparing lithium ion capacitor and supercapacitor
  • Porous electrode, preparation method thereof and application of porous electrode in aspect of preparing lithium ion capacitor and supercapacitor

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Experimental program
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Embodiment 1

[0054] The porous electrode of this embodiment is made by adding a pore-forming agent into the electrode slurry, and extracting the electrode with a polar solvent to remove the pore-forming agent after the electrode is formed.

[0055]The pore forming agent is dibutyl phthalate, and the polar solvent is ethanol. The electrode paste contains active material, conductive agent and binder dispersion system. The active material is activated carbon material, the conductive agent is SP, and the binder is carboxymethyl cellulose and styrene-butadiene rubber. The binder dispersion system is prepared by dispersing carboxymethyl cellulose and styrene-butadiene rubber in water; in the binder dispersion system, the mass percentage of binder is 9%.

[0056] The mass ratio of the active material to the conductive agent is 90:4.5; the mass ratio of the total mass of the active material to the conductive agent to the binder is 84:4; the mass ratio of the pore-forming agent to the active mater...

Embodiment 2

[0066] The porous electrode of this embodiment is made by adding a pore-forming agent into the electrode slurry, and extracting the electrode with a polar solvent to remove the pore-forming agent after the electrode is formed.

[0067] The pore forming agent is butyl benzyl phthalate, and the polar solvent is methanol. The electrode paste contains active material, conductive agent and binder dispersion system. The active material is a graphene material, the conductive agent is SP, and the binder is polytetrafluoroethylene. The binder dispersion system is prepared by dispersing polytetrafluoroethylene in water; in the binder dispersion system, the mass percentage of binder is 10%.

[0068] The mass ratio of the active material to the conductive agent is 95:10; the mass ratio of the total mass of the active material to the conductive agent to the binder is 70:30; the mass ratio of the pore-forming agent to the active material is 5:95.

[0069] The preparation method of the por...

Embodiment 3

[0078] The porous electrode of this embodiment is made by adding a pore-forming agent into the electrode slurry, and extracting the electrode with a polar solvent to remove the pore-forming agent after the electrode is formed.

[0079] The pore forming agent is dicyclohexyl phthalate, and the polar solvent is acetone. The electrode paste contains active material, conductive agent and binder dispersion system. The active material is activated carbon material, the conductive agent is SP, and the binder is polyvinylidene fluoride. The binder dispersion system is prepared by dispersing polyvinylidene fluoride in N-methylpyrrolidone (NMP); in the binder dispersion system, the mass percentage of binder is 7%.

[0080] The mass ratio of the active material to the conductive agent is 98:1; the mass ratio of the total mass of the active material and the conductive agent to the binder is 99:3; the mass ratio of the pore-forming agent to the active material is 3:98.

[0081] The prepar...

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Abstract

The invention discloses a porous electrode, a preparation method thereof and an application of the porous electrode in the aspect of preparing a lithium ion capacitor and a supercapacitor. The porous electrode is formed by adding a pore-forming agent to electrode slurry, and after the electrode is formed, carrying out extraction on the electrode to remove the pore-forming agent by utilizing a polar solvent. According to the porous electrode in the invention, gaps in the surface are many and uniform, and porosity is relatively high, so that the electrode has a relatively-large electrochemical reaction interface; the mechanical strength is large, and the gaps are not easy to collapse, so that electrode performance is high and stable; when electrolyte enters and leaves out of the inner portion of the electrode, the electrolyte can spread quickly to enable electrochemical active materials to reach the surface of the electrode so as to carry out corresponding physical and chemical reactions; the electrode has relatively-high power output capability, and can meet the demand of high power density output of the lithium ion capacitor and the supercapacitor and the like; and the electrode is suitable for energy-storage equipment with high charge-discharge multiplying power, and especially suitable for the preparation of the supercapacitor and the lithium ion capacitor.

Description

technical field [0001] The invention belongs to the technical field of electrode production, specifically relates to a porous electrode, and also relates to a preparation scheme of the porous electrode and its application in the preparation of lithium ion capacitors and supercapacitors. Background technique [0002] The development of human society is based on a large amount of energy consumption. The urgency of research and development of new energy has prompted the world to look for more advanced clean energy, and the pursuit of wind energy, solar energy and hydropower generation with mature technologies is becoming more and more intense. However, these energy sources are discontinuous and require high-efficiency energy storage systems, such as lithium-ion capacitors and supercapacitors, which can effectively store and output energy, and at the same time make the load of the power grid more balanced in the power supply system. [0003] Supercapacitors (Supercapacitors) are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/26H01G11/86H01G11/50
CPCY02E60/13H01G11/26H01G11/06H01G11/86
Inventor 李志
Owner 深圳博磊达新能源科技有限公司
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