A kind of flexible current collector and lithium battery made of this current collector

A technology of current collectors and positive current collectors, applied in the field of flexible lithium batteries, can solve the problem of not finding relevant patents, and achieve the effects of high mass energy density, cost reduction, and low price

Active Publication Date: 2011-12-21
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Searching patents, no related patents have been found that use the same type of aluminum-plated plastic and copper-plated plastic as lithium battery current collectors

Method used

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  • A kind of flexible current collector and lithium battery made of this current collector
  • A kind of flexible current collector and lithium battery made of this current collector
  • A kind of flexible current collector and lithium battery made of this current collector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] positive electrode: Using LiMn 2 o 4 As the positive electrode material 4, mix it with PVDF1 and acetylene black to prepare a positive electrode slurry, and then apply the positive electrode slurry on the aluminized polyethylene plastic 3 with an aluminum layer 2 thickness of 1 μm and an industrial plastic 1 thickness of 10 μm. 0.15mm at 120 o C drying in a vacuum oven to obtain the positive electrode sheet.

[0022] negative electrode : graphite material is used as the negative electrode material 5, mixed with PVDF and VGCF to prepare the negative electrode material, and then the negative electrode slurry is coated on the copper-coated polyethylene plastic 7 with a copper layer 6 thickness of 0.7 μm and an industrial plastic 1 thickness of 10 μm, Coating thickness is 0.08mm, at 100 o C drying in a vacuum oven to obtain the negative electrode sheet.

[0023] The above-mentioned positive pole piece 9, negative pole piece 10 and PE separator 8 are according to i...

Embodiment 2

[0033] positive electrode: Using LiCoO 2 As a positive electrode material, mix it with PVDF and Super-P to prepare a positive electrode slurry, and then apply the positive electrode slurry to an aluminized polyvinyl chloride plastic with an aluminum layer thickness of 2 μm and a plastic thickness of 20 μm, with a coating thickness of 0.18mm , at 100 o C drying in a vacuum oven to obtain the positive electrode sheet.

[0034] negative electrode : Graphite material is used as the negative electrode material, mixed with PTFE and acetylene black to prepare the negative electrode material, and then the negative electrode slurry is coated on copper-coated polyvinyl chloride plastic with a copper layer thickness of 1.5 μm and a plastic thickness of 20 μm. 0.12mm at 120 o C drying in a vacuum oven to obtain the negative electrode sheet.

[0035] The above-mentioned positive pole piece, negative pole piece and PE diaphragm are according to image 3 Laminated in the same way, af...

Embodiment 3

[0045] Positive electrode preparation: Using LiMn 2 o 4 As the positive electrode material, the positive electrode slurry was prepared by mixing with PVDF and VGCF, and then the positive electrode slurry was coated on the aluminized polypropylene plastic with an aluminum layer thickness of 1.5 μm and a plastic thickness of 15 μm, with a coating thickness of 0.15 mm. 120 o C drying in a vacuum oven to obtain the positive electrode sheet.

[0046] Negative electrode preparation : Graphite material is used as the negative electrode material, mixed with PVDF and acetylene black to prepare the negative electrode material, and then the negative electrode slurry is coated on the copper-plated polypropylene plastic with a copper layer thickness of 1.0 μm and a plastic thickness of 22 μm. The coating thickness is 0.13mm at 100 oC drying in a vacuum oven to obtain the negative electrode sheet.

[0047] The above-mentioned positive pole piece, negative pole piece and PP diaphragm...

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Abstract

The invention relates to a soft current collector and a lithium-ion battery made of a soft current collector, which is characterized in that the manufacturing method is as follows: first, the positive electrode is prepared: the positive electrode slurry is coated on the aluminum layer with a thickness of 0.1-10.0 μm, and the thickness of the plastic is 5.0~30.0μm aluminized plastic, the coating thickness is 0.08~0.20mm, after drying in a vacuum oven at 80~120oC, the positive electrode sheet is obtained; the negative electrode is prepared and the negative electrode slurry is coated on the copper layer with a thickness of 0.2~8.0μm , On the copper-plated plastic with a plastic thickness of 5.0~30.0μm, the coating thickness is 0.06~0.15mm, and the negative electrode sheet is obtained after drying in a vacuum oven at 80~120oC; the positive electrode sheet, PP or PE separator, and the negative electrode are sequentially The pole pieces are stacked and packed with aluminum-plastic film, and an appropriate amount of electrolyte solution 1MLiPF6+EC:DMC (1:1) is injected into the glove box; the aluminum-plastic film is hot-pressed and packaged to obtain a flexible lithium-ion battery. It effectively improves the mass energy density of the battery cell. The cost of the battery monomer is reduced; it has the advantages of low price, because the shape of the lithium-ion battery prepared by it can be arbitrary, ultra-thin, and the mass energy density is high.

Description

technical field [0001] The invention relates to a flexible current collector for a lithium ion battery and a lithium ion battery made of the current collector, in particular to a flexible type with aluminum-plated plastics and copper-plated plastics as positive current collectors and negative current collectors, respectively. lithium battery. Background technique [0002] Due to the advantages of high efficiency, cleanliness, and recyclability, lithium-ion batteries are considered to be an important energy storage device to comprehensively alleviate energy crisis and environmental pollution. Especially in recent years, with the rapid development of electric vehicles and hybrid electric vehicles, lithium-ion batteries have received more extensive attention and more in-depth research. However, due to problems such as energy density and price, existing lithium-ion batteries still cannot be used in new energy vehicles on a large scale. Therefore, we must develop new lithium ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/66H01M4/1391H01M10/0525
CPCY02E60/122Y02E60/12Y02E60/10
Inventor 姜涛张克金王丹安宇鹏王金兴荣常如魏晓川许德超
Owner CHINA FIRST AUTOMOBILE
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