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Novel negative electrode piece and lithium ion battery utilizing same

A technology of lithium ion battery and negative pole piece, which is used in secondary batteries, secondary battery repair/maintenance, non-aqueous electrolyte battery electrodes, etc. Problems such as poor wettability and poor high temperature resistance can achieve the effect of avoiding thermal runaway, improving production quality and service life, and improving safety and thermal stability.

Inactive Publication Date: 2017-10-20
力神电池(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the polyolefin separator, its high temperature resistance is poor, it has obvious heat shrinkage effect at high temperature, and there are problems such as poor wettability of the organic electrolyte to the separator, so that the interior of the lithium-ion battery will be caused by excessive temperature. Thermal runaway phenomenon seriously affects the high temperature performance, safety and thermal stability of lithium-ion batteries

Method used

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  • Novel negative electrode piece and lithium ion battery utilizing same
  • Novel negative electrode piece and lithium ion battery utilizing same
  • Novel negative electrode piece and lithium ion battery utilizing same

Examples

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specific Embodiment 1

[0091] In specific embodiment 1, the present invention prepares lithium ion battery, comprises the following steps:

[0092] 1. See attached figure 2 As shown, according to the traditional process route of preparing lithium-ion batteries, the positive electrode slurry and the negative electrode slurry of the battery are first prepared, and then the positive electrode slurry and the negative electrode slurry are evenly coated on the aluminum foil (positive electrode) and copper foil by roll coating. foil (negative electrode) surface. Among them, the positive electrode active material uses LiCoO 2 , the negative electrode active material uses artificial graphite;

[0093] 2. See figure 1 As shown, a negative electrode sheet with a negative ceramic layer was prepared. Specifically, zirconia ceramic slurry is used to uniformly coat the original negative electrode active material on the surface of the negative electrode current collector, and completely cover the negative electr...

Embodiment 2

[0098] 1. See figure 2 As shown, according to the traditional process route for preparing lithium-ion batteries, the positive electrode slurry and the negative electrode slurry of the battery are firstly prepared. The positive electrode slurry and the negative electrode slurry are evenly coated on the surfaces of the aluminum foil (positive electrode) and the copper foil (negative electrode) by roll coating. Among them, the positive electrode active material uses LiCoO 2 , the negative electrode active material uses artificial graphite;

[0099] 2. See figure 1 As shown, a negative electrode sheet with a negative ceramic layer was prepared. Specifically, the aluminum oxide ceramic slurry is evenly coated on the surface of the original negative electrode active material on the surface of the negative electrode current collector, and the negative electrode active material is completely covered. The thickness of the coating layer is controlled at 3μm, and the coating speed i...

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Abstract

The invention discloses a novel negative electrode piece. The novel negative electrode piece comprises a negative electrode current collector (1), wherein the surface of the negative electrode current collector (1) is coated with a negative electrode ceramic layer (2). The invention further discloses a lithium ion battery utilizing the novel negative electrode piece. The lithium ion battery comprises a cell core and a cell shell, wherein the cell core is located in the cell shell and comprises a positive electrode piece, the negative electrode piece, electrolyte and a ceramic diaphragm, and the ceramic diaphragm is located between the positive electrode piece and the negative electrode piece and is used for separating the positive electrode piece and the negative electrode piece. According to the novel negative electrode piece and the lithium ion battery utilizing the novel negative electrode piece, the adopted ceramic diaphragm and the negative electrode piece coated with the ceramic layer have high-temperature resistance, so that the safety and thermal stability of the lithium ion battery can be enhanced, a thermal runaway phenomenon caused due to an over-high temperature in the battery is avoided, the production quality of the lithium ion battery can be remarkably improved, and the service life of the lithium ion battery can be remarkably prolonged.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a novel negative pole piece and a lithium ion battery for which the same is applied. Background technique [0002] At present, as energy issues, environmental pollution and other issues become increasingly prominent, my country has introduced a number of policies to encourage and promote the development of the electric vehicle industry. Lithium-ion power batteries have the advantages of high energy density, long cycle life, high specific power and environmental friendliness, and have been widely used in the field of electric vehicles. The use of lithium-ion batteries with higher energy density in the automotive field is becoming a core technology. It has light weight, large energy storage, high power, no secondary pollution, long life, small self-discharge coefficient, and wide temperature range. It is an ideal vehicle battery for electric vehicles. [0003] Lithium-ion batte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/13H01M10/0525H01M10/42
CPCH01M4/13H01M10/0525H01M10/4235Y02E60/10
Inventor 张霁明
Owner 力神电池(苏州)有限公司