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High-safety lithium ion battery positive electrode and preparation method for positive electrode active material slurry

A cathode active material, lithium-ion battery technology, applied in battery electrodes, batteries, secondary batteries, etc., can solve the problems of poor safety reliability, high melting point, flammability, etc., to prolong the service life, improve the charging voltage value, The effect of improving safety and reliability

Inactive Publication Date: 2016-06-22
CHAOWEI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention mainly provides a lithium-ion battery positive electrode with a high melting point, which can greatly improve the safety and reliability of the battery and prolong the service life of the battery, and the preparation method of the positive electrode active material slurry, which solves the existing problems. There are technical problems in the technology that the positive electrode of lithium-ion batteries is flammable, even causing explosions, poor safety and reliability, etc.

Method used

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  • High-safety lithium ion battery positive electrode and preparation method for positive electrode active material slurry

Examples

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Embodiment 1

[0019] Such as figure 1 As shown, a lithium-ion battery positive electrode with high safety performance of the present invention includes a positive electrode current collector 1, and the positive electrode current collector 1 is a stainless steel foil that can maintain stability within the battery charge and discharge window and has a melting point higher than 1000 ° C. The surface of the current collector 1 is provided with a positive electrode current collector coating 3 of aluminum, and a positive electrode current collector conductive coating 4 is provided outside the positive electrode current collector coating 3, and the surface of the positive electrode current collector conductive coating 4 is coated with a positive electrode active material coating. 2, wherein the thickness of the positive electrode current collector coating 3 is 0.005mm, and the thickness of the positive electrode current collector conductive coating 4 is 0.002mm.

[0020] A preparation method of a ...

Embodiment 2

[0026] The positive current collector 1 is an iron foil that can maintain stability within the battery charge and discharge window and has a melting point higher than 1000°C. The thickness of the positive current collector coating 3 is 0.008mm, and the thickness of the positive current collector conductive coating 4 is 0.005mm. All the other parts are identical to Example 1.

[0027] An electric vehicle of the present invention includes the positive electrode of lithium-ion battery with high safety performance in Example 1 and the preparation method of the positive electrode active material slurry.

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Abstract

The invention discloses a lithium ion battery and provides a high-safety lithium ion battery positive electrode and a preparation method for a positive electrode active material slurry; the lithium ion battery positive electrode is high in melting point and capable of greatly improving the safety and reliability of the battery and prolonging the service life of the battery; the technical problems of inflammable positive electrode, probability of explosion, relatively low safety and reliability and the like of the lithium ion battery existing in the prior art are solved. The high-safety lithium ion battery positive electrode comprises a positive electrode current collector and a positive electrode active material coating layer coating the surface of the positive electrode current collector, wherein the positive electrode current collector is metal or alloy which can be kept stable within a battery charging-discharging window and has the melting point of greater than 1,000 DEG C.

Description

technical field [0001] The invention relates to a lithium-ion battery, in particular to a high-safety lithium-ion battery positive electrode with high melting point, which can improve the safety and reliability of the battery and prolong the service life of the battery, and a method for preparing the positive electrode active material slurry. Background technique [0002] In recent years, due to the advantages of high energy density, high output voltage, long cycle life and low environmental pollution, lithium-ion batteries have been more and more widely used in various fields such as electronic products, electric vehicles, and aerospace. However, fires and explosions of lithium-ion batteries also occur from time to time, so people pay more and more attention to their safety, which also restricts the development of lithium-ion batteries in the direction of large-scale and high-energy. Experiments have shown that when acupuncture, extrusion, overcharging and heating are perfo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/66H01M4/131H01M4/1391H01M10/0525
CPCH01M4/131H01M4/1391H01M4/661H01M10/0525H01M2220/20Y02E60/10
Inventor 李少刚柯克蔡勇
Owner CHAOWEI POWER CO LTD
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