Lithium ion battery cathode and preparation method thereof

A lithium-ion battery and negative electrode technology, applied in the field of lithium-ion battery negative electrode and its preparation, can solve the problems that are not conducive to the lightweight and practical application of batteries, the poor conductivity of MOFs materials, and the reduction of the proportion of active materials, etc., to achieve light weight and conductive performance Good, high specific capacity effect

Inactive Publication Date: 2016-04-13
CHANGAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the conductivity of MOFs materials is poor, and a large amount of conductive agent needs to be added to improve the electronic conductivity when preparing electrodes.
The addition of too much conductive agent reduces the proportion of active materials, which is not conducive to the lightweight and practical application of batteries
[0005] The traditional process of making lithium-ion batteries is cumbersome. It is necessary to prepare the active material first, then add a binder and a conductive agent to prepare a slurry, and coat it on the copper sheet. Moreover, the coating is uneven, and the active material is easy to dry during the drying process. Problems such as peeling can easily affect the performance of the battery

Method used

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  • Lithium ion battery cathode and preparation method thereof
  • Lithium ion battery cathode and preparation method thereof
  • Lithium ion battery cathode and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Pretreatment foamed copper sheet: use a rolling machine to compact the foamed copper substrate with a porosity of 95-98% under a pressure of 10 MPa, then wash the foamed copper sheet with hydrochloric acid, and then wash the foamed copper sheet with absolute ethanol slices, placed in a protective atmosphere, dried at 60°C, and set aside;

[0032] (2) Measure 30ml of N, N-dimethylformamide, 20ml of absolute ethanol and 10ml of distilled water (volume ratio 3:2:1) at room temperature, and record it as solvent; weigh 0.105g of terephthalamide at room temperature Formic acid, 0.375g cobalt nitrate hexahydrate (molar ratio is 1: 2), recorded as the active reaction substance; and the solvent and the active reaction substance were added successively in a stainless steel hydrothermal reaction kettle with polytetrafluoroethylene lining, and stirred for 1h;

[0033] (3) Perforate the pretreated foamed copper sheet, and immerse it in the stainless steel hydrothermal reaction k...

Embodiment 2

[0036] (1) Pretreatment foamed copper sheet: use a rolling machine to compact the foamed copper substrate with a porosity of 95-98% under a pressure of 10 MPa, then wash the foamed copper sheet with hydrochloric acid, and then wash the foamed copper sheet with absolute ethanol slices, placed in a protective atmosphere, dried at 60°C, and set aside;

[0037] (2) Measure 30ml of N,N-dimethylformamide, 10ml of absolute ethanol and 10ml of distilled water (volume ratio 3:1:1) at room temperature, and record it as solvent; weigh 0.105g of terephthalamide at room temperature Formic acid, 0.375g cobalt nitrate hexahydrate (molar ratio is 1: 2), recorded as the active reaction substance; and the solvent and the active reaction substance were added successively in a stainless steel hydrothermal reaction kettle with polytetrafluoroethylene lining, and stirred for 1h;

[0038] (3) Perforate the pretreated foamed copper sheet, and immerse it in the stainless steel hydrothermal reaction ke...

Embodiment 3

[0041] (1) Pretreatment foamed copper sheet: use a rolling machine to compact the foamed copper substrate with a porosity of 95-98% under a pressure of 10 MPa, then wash the foamed copper sheet with hydrochloric acid, and then wash the foamed copper sheet with absolute ethanol slices, placed in a protective atmosphere, dried at 60°C, and set aside;

[0042] (2) Measure 30ml of N, N-dimethylformamide, 20ml of absolute ethanol and 20ml of distilled water (volume ratio 3:2:2) at room temperature, and record it as solvent; weigh 0.105g of terephthalamide at room temperature Formic acid, 0.375g cobalt nitrate hexahydrate (molar ratio is 1: 2), recorded as the active reaction substance; and the solvent and the active reaction substance were added successively in a stainless steel hydrothermal reaction kettle with polytetrafluoroethylene lining, and stirred for 1h;

[0043](3) Perforate the pretreated foamed copper sheet, and immerse it in the stainless steel hydrothermal reaction ke...

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Abstract

The invention relates to the field of lithium ion batteries, in particular to a lithium ion battery cathode and a preparation method thereof. According to the lithium ion battery cathode, a foam copper sheet serves as a current collector, and terephthalate cobalt serves as active substances. The lithium ion battery cathode is prepared from the foam copper sheet, terephthalic acid, cobalt-nitrate hexahydrate, N,N-dimethyl-formamide, anhydrous ethanol and deionized water. A hydrothermal reaction method is adopted for the preparation method, the active substances can directly grow on the surface of the foam cupper sheet and in pores, a traditional complicated coating technology is not needed, and the cathode applicable to lithium ion batteries can be further obtained. When the method is used for preparing the batteries, cost is low, operation is easy, and the prepared batteries are light and high in specific capacity.

Description

technical field [0001] The invention relates to the technical field of lithium-ion battery preparation, in particular to a lithium-ion battery negative electrode and a preparation method thereof. Background technique [0002] Lithium-ion batteries have the advantages of high battery voltage, long cycle life, and environmental friendliness, and are widely used in various electronic portable devices such as mobile phones, cameras, and notebook computers. However, the theoretical specific capacity of the carbon material used in the negative electrode of commercial lithium-ion batteries is only 372mAh / g, and it is prone to co-intercalation of organic solvents, which cannot meet the needs of the growing high-energy energy storage system. Therefore, people are now working on research Active materials with large specific capacity, stable cycling and excellent rate performance. [0003] Lithium-ion anode materials that are currently studied include alloy-type anode materials and na...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/64H01M4/66H01M4/60H01M4/139H01M10/0525
CPCH01M4/139H01M4/60H01M4/64H01M4/66H01M4/661H01M10/0525Y02E60/10
Inventor 苟蕾夏霁雯刘鹏刚刘丹樊小勇李东林
Owner CHANGAN UNIV
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