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Lithium ion battery and manufacturing method thereof

A lithium-ion battery and manufacturing method technology, applied in the field of lithium-ion batteries, can solve the problems of poor battery high-temperature storage performance and high-temperature cycle performance, poor battery storage performance, and lack of protection for the positive electrode, achieving high energy density and reducing gas The effect of producing and reducing side effects

Active Publication Date: 2014-07-16
安普瑞斯(无锡)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The battery produced in this way not only has poor storage performance, but also has a sharp deterioration in cycle performance;
[0007] (2) The deposition rate is low, and the deposition rate is about 0.01-0.03nm / cycle at 250-400°C;
[0008] (3) The reaction time is long. Since the traditional atomic layer deposition method requires two steps to remove the reaction precursor, the overall reaction time is longer and the deposition efficiency is reduced.
However, this method cannot avoid the reaction between the positive electrode active material and the electrolyte and the dissolution of the metal in the electrolyte, which does not protect the positive electrode. At a higher charging voltage > 4.2V, the battery's high-temperature storage performance and high-temperature cycle poor performance

Method used

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  • Lithium ion battery and manufacturing method thereof
  • Lithium ion battery and manufacturing method thereof
  • Lithium ion battery and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Such as Figure 1 to Figure 4 as shown, figure 1 It is a schematic diagram of the obtained full battery cell after winding. A lithium ion battery of the present invention includes a sealed package and an electrode group and an electrolyte disposed in the sealed package, the electrode group includes a positive electrode sheet, a negative electrode sheet, and a separator arranged between the positive electrode sheet and the negative electrode sheet The lithium-ion battery further includes a nano-protection layer, the nano-protection layer is arranged on the positive electrode sheet surface, the negative electrode sheet surface and the separator surface of the lithium-ion battery, and the thickness of the nano-protection layer is 0.2-10nm. The nano protective layer is Al 2 o 3 .

[0040] A manufacturing method of a lithium ion battery according to the present invention, the manufacturing method of the lithium ion battery is a low temperature coating method. The plasma...

Embodiment 2

[0070] The difference between embodiment 2 and embodiment 1 is: the temperature of PE-ALD is 20 ℃, each cycle process Al 2 o 3 The thickness of the protective layer is increased by 0.05nm, and the process is repeated for 4 cycles to control the Al 2 o 3 Film thickness up to 0.2nm;

[0071] It is actually measured that the full battery has a capacity retention rate of 71% after 300 charge-discharge cycles at 45°C; at a temperature of 60°C, the 14-day storage capacity retention rate is 77%; at a temperature of Under the condition of 60 ℃, the 14-day storage thickness expansion rate is 10.6%. The test results are listed in Table 1.

Embodiment 3

[0073] The difference between embodiment 3 and embodiment 1 is that: the temperature of PE-ALD is 130°C, and the nano protective layer Al 2 o 3 The thickness of the film is increased by 0.16nm, repeating the 63 cycle process, controlling the Al 2 o 3 The film thickness is up to 10nm;

[0074] It is actually measured that the full battery has a capacity retention rate of 65% after 300 charge-discharge cycles at 45°C; at a temperature of 60°C, the 14-day storage capacity retention rate is 92%; at a temperature of Under the condition of 60 ℃, the 14-day storage thickness expansion rate is 3.5%. The test results are listed in Table 1.

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Abstract

The invention provides a lithium ion battery. The lithium ion battery comprises a sealed packaging piece, and an electrode set and electrolyte which are arranged in the sealed packaging piece, wherein the electrode set comprises an anode piece, a cathode piece and a separation membrane arranged between the anode piece and the cathode piece; the lithium ion battery further comprises nano protection layers; the nano protection layers are arranged on the surface of the anode piece, the surface of the cathode piece and the surface of the separation membrane of the lithium ion battery; the thickness of each nano protection layer is 0.2-10nm. According to the lithium ion battery, a plasma enhanced type atom layer deposition layer is used for putting a wound battery core into a reaction cavity; meanwhile, the nano protection layers are uniformly plated on the surface of the anode piece, the surface of the cathode piece and the surface of the separation membrane, so that the lithium ion battery has excellent high-temperature storage performance, high-temperature cycle performance and safety performance; the lithium ion battery has the advantages of simple preparation method, low reaction temperature, small energy consumption, controllable thickness, wide reaction precursors, rapid deposition speed and capability of being produced in a large batch.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a lithium ion battery and a manufacturing method thereof. Background technique [0002] As a new type of secondary battery with high energy density and environmental protection, lithium-ion batteries are widely used in portable electronic products, electric vehicles, energy storage and other fields. Especially with the vigorous development of smartphones, tablet computers and super notebook computers in recent years, the market demand for lithium-ion batteries has also increased rapidly. At the same time, these devices have higher and higher requirements for the service life, high temperature performance, energy density and safety performance of lithium-ion batteries. [0003] In order to increase the energy density of lithium-ion batteries, increasing the charging voltage of the battery is one of the very effective ways. However, metal oxides as positive electrod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M10/0587C23C16/44
CPCC23C16/44H01M10/0525H01M10/0587Y02E60/10Y02P70/50
Inventor 徐子福王岑韩松汪芳张明慧
Owner 安普瑞斯(无锡)有限公司
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