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Lithium ion battery capable of improving comprehensive performance

A lithium-ion battery, battery cell technology, applied in battery electrodes, secondary batteries, non-aqueous electrolyte battery electrodes, etc., can solve the problems of organic solvents polluting the environment, less heat release, poor adhesion, etc. performance, improve the safety of use, improve the effect of overall performance

Active Publication Date: 2014-04-02
WUHAN LISHEN POWER CELL SYST TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For battery cells, from the perspective of the negative electrode, the negative electrode of the organic system has the characteristics of good adhesion, good low temperature resistance, and low resistance, but the disadvantages are high cost and environmental pollution by organic solvents; the negative electrode of the water solvent has high capacity, Low cost, less heat release, etc., but poor adhesion and high resistance

Method used

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  • Lithium ion battery capable of improving comprehensive performance
  • Lithium ion battery capable of improving comprehensive performance
  • Lithium ion battery capable of improving comprehensive performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] 1. The production process of the positive electrode sheet: the user uses the solvent N, N dimethylpyrrolidone (NMP) to dissolve polyvinylidene fluoride (PVDF), and then LiCoO 2 and conductive agent SP are dispersed into the solvent, and its weight ratio is LiCoO 2 :SP:PVDF=94:3:3, mix and stir evenly to obtain a fluid positive electrode slurry, and then apply the slurry evenly on the positive electrode current collector (such as aluminum foil), such as figure 1 shown, and then dried to make the positive electrode slurry completely form a layer of positive electrode active material on the surface of the positive electrode current collector, and finally prepare the positive electrode sheet.

[0053] 2. The production process of the negative electrode slurry in the organic system: the user uses the solvent N, N dimethylpyrrolidone (NMP) to dissolve polyvinylidene fluoride (PVDF), and then disperses artificial graphite and conductive agent SP into the solvent. The weight ...

Embodiment 2

[0058] The method used in Example 1 is basically the same as in Example 1, but the long surface 11 on the top and the short surface 12 on the bottom of the negative electrode current collector (copper foil) are coated with organic system negative electrode slurry.

Embodiment 3

[0060] The method used in Example 3 is basically the same as in Example 1, but the long surface 11 at the top and the short surface 12 at the bottom of the negative electrode current collector (copper foil) are coated with water solvent system negative electrode slurry.

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Abstract

The invention discloses a lithium ion battery capable of improving the comprehensive performance. The lithium ion battery comprises a battery electric core, wherein the battery electric core comprises a cathode piece, an anode piece, an electrolyte and a diaphragm, wherein the cathode piece comprises a cathode current collector; a layer of cathode slurry is coated on the surface of the cathode current collector; the anode piece comprises an anode current collector; and anode slurry is coated on the surfaces of the upper side and the lower side of the anode current collector respectively. According to the lithium ion battery capable of improving the comprehensive performance, the whole performance, such as the safety performance and the environment performance, of the battery can be improved by flexibly coating organic system anode slurry and water solvent system anode slurry on the upper side and the lower side of the anode current collector of the electric core, so that the using safety of the battery is improved greatly, and the market application prospect of products of a battery production factory is improved; and the lithium ion battery has a significance for production practicability.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a lithium-ion battery capable of improving comprehensive performance. Background technique [0002] In recent years, with the rapid development of portable electronic devices, higher requirements have been placed on power supplies. Lithium-ion secondary batteries are favored for their advantages of high voltage, large specific capacity, small self-discharge, light weight, and no memory. They are not only widely used in portable electronic devices such as mobile phones, digital cameras and laptop computers, but also Widely used in large and medium-sized electric equipment such as electric vehicles, electric bicycles and electric tools. [0003] At present, a lithium-ion secondary battery generally includes a battery cell, an integrated circuit board, and a battery outer package, and a battery cell is composed of a positive electrode, a negative electrode, an electrolyte, a diap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0525H01M4/13H01M4/62
CPCY02E60/122Y02E60/10
Inventor 任长媛李鹏滕彦梅马茂盛
Owner WUHAN LISHEN POWER CELL SYST TECH CO LTD