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A high-performance carbon paper-based electrode negative electrode composite material and its preparation method and application

A composite material and base electrode technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of poor cycle stability, unenvironmentally friendly preparation process, low rate performance, etc., and achieve excellent charge-discharge performance, good cycle stability, good repeatability

Active Publication Date: 2019-01-18
重庆弘脉天下农业发展有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Purpose of the invention: In view of the problems of poor cycle stability, low rate performance and insufficient environmental protection of the preparation process in the prior art of lithium-ion batteries, the purpose of the present invention is to provide an environmentally friendly integrated high-performance carbon paper-based composite electrode, and Preparation method of the composite electrode and application in lithium ion battery

Method used

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  • A high-performance carbon paper-based electrode negative electrode composite material and its preparation method and application
  • A high-performance carbon paper-based electrode negative electrode composite material and its preparation method and application
  • A high-performance carbon paper-based electrode negative electrode composite material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The hydroxylated carbon paper is prepared by ultrasonicating the carbon paper through a mixed solution of concentrated sulfuric acid / concentrated nitric acid (3 / 1 volume ratio) at 60°C for 1 hour.

[0034] Disperse 0.2g of Si powder in 10mL of 0.5% acetic acid aqueous solution, sonicate evenly, add 0.05g of P123, 0.3g of polystyrene balls, and continue to sonicate for 15min. The chitosan with a viscosity of 168cps was configured into 3.5% chitosan gel (containing 0.5% acetic acid). Take out 10g of chitosan gel and disperse it in the solution obtained by ultrasound, and stir it ultrasonically for 20 minutes; stir the solution under heating until viscous, apply it on hydroxylated carbon paper, and dry it in vacuum at 700°C 3h Ar gas sintering.

[0035] The sintered electrode is used as the negative electrode material of the lithium ion electrode, placed in the 2025 battery case, with the lithium sheet as the counter electrode, the polyethylene film as the separator, and ...

Embodiment 2

[0039] The hydroxylated carbon paper is prepared by ultrasonicating the carbon paper through a mixed solution of concentrated sulfuric acid / concentrated nitric acid (3 / 1 volume ratio) at 60°C for 1 hour.

[0040] Disperse 0.2g of Sn powder in 10mL of 1% acetic acid aqueous solution, sonicate for 20min, add 0.4g of F127, add 0.1g of polystyrene balls, and continue to sonicate for 15min. The chitosan with a viscosity of 500cps was configured into 3.5% chitosan gel (containing 1% acetic acid). Take out 5.8 g of chitosan gel and disperse it in the solution obtained by the above-mentioned ultrasound, and stir it ultrasonically for 20 minutes; stir the solution under heating until it becomes viscous, apply it on the hydroxylated carbon paper, and dry it in vacuum at 500 Degree 6h Ar gas sintering.

[0041] The obtained composite material is detected by SEM and TEM, and the structure of the material obtained in Example 1 is basically similar.

[0042] The sintered electrode is used...

Embodiment 3

[0044] The hydroxylated carbon paper is prepared by ultrasonicating the carbon paper through a mixed solution of concentrated sulfuric acid / concentrated nitric acid (3 / 1 volume ratio) at 60°C for 1 hour.

[0045] Disperse 0.2g of zinc manganate powder in 10mL of 0.5% aqueous acetic acid solution, ultrasonicate for 20min, add 0.2g of P123, add 0.2g of polystyrene balls, and continue ultrasonicating for 15min. Chitosan with a viscosity of 50 cps. was configured into 3.5% chitosan gel (containing 0.5% acetic acid). Take out 15g of chitosan gel and disperse it in the solution obtained by ultrasound, and stir it ultrasonically for 20 minutes; stir the solution under heating until viscous, apply it on hydroxylated carbon paper, and dry it in vacuum at 600°C 3h Ar gas sintering.

[0046] The obtained composite material is detected by SEM and TEM, and the structure of the material obtained in Example 1 is basically similar.

[0047] The sintered electrode is used as the negative ele...

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Abstract

The invention discloses a high-performance carbon paper-based electrode negative electrode composite material and a preparation method and application thereof. The composite material is mainly composed of a carbon paper substrate and an active material, and the hydroxylated carbon paper is used as the substrate. It not only adheres to the surface of the carbon paper, but also penetrates into the interior of the carbon paper and adheres to the surface of the carbon fiber inside, and the entire composite structure contains a porous structure. Compared with the prior art, the invention has the advantages of simple process steps, short reaction time, good repeatability, high yield, low cost, and good potential for large-scale application; the prepared electrode is integrated, and no further processing is required. Conventional electrode preparation involves numerous process steps, such as mixing, coating, and drying, and is easy to use; when it is used to prepare lithium ion electrodes, it has good rate, cycle stability, and excellent charge-discharge performance.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a high-performance carbon paper-based composite material, a preparation method and its application in lithium-ion batteries. Background technique [0002] Lithium-ion batteries have the advantages of high open-circuit voltage, high energy density, long service life, no memory effect, less pollution, and low self-discharge rate. Its overall performance is superior to other traditional secondary batteries, and it is unanimously considered as a variety of portable batteries. The most ideal power supply for electronic equipment and electric vehicles. Although graphite, the negative electrode material of traditional lithium-ion batteries, has good cycle stability and high cost performance, due to its low charge-discharge specific capacity and no advantage in volume specific capacity, it is difficult to meet the high requirements of power systems, especially electric vehicl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/583H01M4/38H01M4/48H01M4/50H01M4/52H01M4/36H01M4/139H01M10/0525
CPCH01M4/139H01M4/362H01M4/38H01M4/386H01M4/387H01M4/48H01M4/483H01M4/502H01M4/523H01M4/583H01M10/0525Y02E60/10
Inventor 岳鹿张文惠徐宁罗改霞关荣峰
Owner 重庆弘脉天下农业发展有限公司
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