Lithium cell based preparation method of multi-layer metal-carbon navigate electrode

A multi-layer metal and lithium battery technology, applied in battery electrodes, electrode manufacturing, secondary batteries, etc., can solve problems such as weak structural stability, affecting the stability of lithium ion deintercalation channels, and large internal resistance, achieving increased stability performance, improve the effect of high internal resistance and reduce the amount of use

Active Publication Date: 2018-06-01
北京太蓝新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the negative electrode active material is a mixture of artificial graphite and mesophase carbon microspheres, and the composite negative electrode material made of superconducting materials such as graphene and CNTs with good low-temperature conductivity has good low-temperature conductivity, but the main material of the negative electrode is artificial. Graphite has a large internal resistance in a low temperature environment, and its structural stability is weak, and the defects that affect the stability of lithium ion deintercalation channels still exist

Method used

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  • Lithium cell based preparation method of multi-layer metal-carbon navigate electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Immerse the sheet copper foil with a thickness of 80 microns in the acetone solution, set the ultrasonic power to 50kW, and ultrasonic time for 5 minutes, clean and remove the oil stains on the surface, and put the sheet copper foil degreased on the surface into the pH value In the acetic acid solution of 5, the temperature of the acetic acid solution is controlled to be 40°C, and the treatment time is 16 minutes, and the surface oxide layer is corroded by the acetic acid surface to obtain pure copper foil;

[0029] (2) The pure copper foil is grooved on one side by etching process, using hydrogen peroxide and dilute hydrochloric acid with a volume concentration of 15% as the corrosion solution, the corrosion time is 10 minutes, the corrosion depth is 5 microns, and after cleaning with deionized water, A copper foil with raised arrays obtained through nitrogen blowing intervention;

[0030] (3) Using PECVD technology, set the background vacuum of the deposition cham...

Embodiment 2

[0035] (1) Immerse the sheet copper foil with a thickness of 120 microns in the acetone solution, set the ultrasonic power to 30kW, and ultrasonic time for 20 minutes, clean and remove the surface oil stains, and put the sheet copper foil with degreased surface into the pH value In the acetic acid solution of 3, the temperature of the acetic acid solution is controlled at 70°C, and the treatment time is 10 minutes, and the surface oxide layer is corroded by the acetic acid surface to obtain pure copper foil;

[0036] (2) The pure copper foil is grooved on one side by etching process, hydrogen peroxide and dilute hydrochloric acid with a volume concentration of 17% are used as the corrosion solution, the corrosion time is 5 minutes, the corrosion depth is 9 microns, and after cleaning with deionized water, A copper foil with raised arrays obtained through nitrogen blowing intervention;

[0037] (3) Using PECVD technology, set the background vacuum of the deposition chamber to 1...

Embodiment 3

[0042] (1) Immerse the sheet copper foil with a thickness of 100 microns in the acetone solution, set the ultrasonic power to 40kW, and ultrasonic time for 12 minutes, clean and remove the oil stains on the surface, and put the sheet copper foil degreased on the surface into the pH value In the acetic acid solution of 3, the temperature of the acetic acid solution is controlled to be 55°C, and the treatment time is 12 minutes, and the surface oxide layer is corroded by the acetic acid surface to obtain pure copper foil;

[0043] (2) The pure copper foil is grooved on one side by etching process, hydrogen peroxide and dilute hydrochloric acid with a volume concentration of 16% are used as the corrosion solution, the corrosion time is 8 minutes, the corrosion depth is 6 microns, and after cleaning with deionized water, A copper foil with raised arrays obtained through nitrogen blowing intervention;

[0044] (3) Using PECVD technology, set the background vacuum degree of the depo...

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Abstract

The invention provides a lithium cell based preparation method of a multi-layer metal-carbon navigate electrode. The method is characterized in that sheet type copper foils are subjected to micromachining to obtain convex array type copper foils; a carbon layer / metal / metal oxide layer / carbon layer structure containing a diamond structure is deposited on the surfaces of the copper foil, and thusthe multi-layer metal-carbon negative electrode material using diamond as a framework is prepared. According to the scheme, the method has the advantages that the existing problem that carbon negative electrode materials such as graphite cannot be subjected to lithium embedding under low temperature condition can be overcome; the stability of the navigate electrode under low temperature conditionis improved; the size change of the negative electrode material in embedding releasing process is inhibited; the potential barrier of lithium ions in embedding is reduced. Therefore, the lithium ionsare easily embedded into the negative electrode, and the internal resistance of the negative electrode material is reduced, and as a result, the transfer rate of the lithium ions can be increased; inaddition, the negative electrode material prepared by the method is free from an adhesive and a conducting agent during the assembling process; a current collector can be directly mounted into a cell; the use is convenient; the environmental protection is realized.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a method for preparing a multilayer metal-carbon negative electrode based on lithium batteries. Background technique [0002] With the process of economic globalization and the increasing demand for energy, finding new energy storage devices has become a hot spot in the field of new energy. Compared with nickel-cadmium and nickel-metal hydride batteries, lithium-ion batteries have many advantages such as high voltage, large specific energy, long cycle life, good safety performance, small self-discharge, no memory effect, fast charge and discharge, and wide operating temperature range. It is widely used in various fields. [0003] The main structure of a lithium-ion battery includes a positive electrode, an electrolyte, a negative electrode, and a separator. The positive electrode includes a current collector composed of lithium cobalt oxide (or nickel cobalt lithiu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/1393H01M4/1395H01M4/04H01M10/0525
CPCH01M4/0428H01M4/1393H01M4/1395H01M10/0525Y02E60/10
Inventor 陈庆廖健淞
Owner 北京太蓝新能源有限公司
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