A kind of coated positive electrode material with slow decomposing oxygen, its preparation method and application

A positive electrode material and coating type technology, applied in the field of new energy, can solve the problems of increasing the impedance of the positive electrode sheet and decreasing the cycle performance of the battery, and achieve the effects of easy quantitative control, good electrochemical performance, and improved safety performance.
CN113517429BActive Publication Date: 2022-04-08SVOLT ENERGY TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SVOLT ENERGY TECHNOLOGY CO LTD
Publication Date
2022-04-08

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Abstract

The invention discloses a coated positive electrode material for slow decomposing oxygen, its preparation method and application. The coated positive electrode material includes a positive electrode active material and a metal layer coated on the surface of the positive electrode active material. The metal layer is formed after the melting of a metal element, and the metal activity of the metal element is stronger than hydrogen and weaker than hydrogen. magnesium. When the positive electrode material of the present invention is applied to a lithium ion battery, it not only exhibits an excellent effect of slowing and decomposing oxygen, improves the safety performance of the battery, but also ensures good electrochemical performance.
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Description

technical field

[0001] The invention relates to the technical field of new energy, and relates to a coated positive electrode material for slowing and decomposing oxygen, a preparation method and application thereof. Background technique

[0002] Lithium battery is the key to promote the next generation of sustainable energy technology, among which high energy density lithium ion battery has been paid more and more attention by researchers. Oxygen-containing cathodes are the main components of high-voltage, high-energy-density lithium-ion batteries. Since graphite is used as the anode in most commercial Li-ion batteries, the electrochemical performance of the battery, such as energy density and operating voltage, is determined by the choice of cathode material.

[0003] In order to obtain lithium-ion batteries with high energy density, the current main technical route is to use high-nickel, high-voltage positive electrode materials, and the main problem brought about by the...

Claims

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