Lithium manganese oxide material and preparation method thereof

A lithium manganate and coating technology, which is applied in the field of high crystallinity lithium manganate material and its preparation, can solve the problems that the coating elements cannot form a concentration gradient, the coating is unevenly dispersed, and the coating effect cannot be achieved. , to achieve the effects of improving high temperature and normal temperature cycle performance and high temperature storage performance, excellent high temperature storage performance, good room temperature and high temperature cycle performance
CN102054985AInactive Publication Date: 2011-05-11BEIJING EASPRING MATERIAL TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING EASPRING MATERIAL TECH CO LTD
Publication Date
2011-05-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a lithium manganese oxide material and a preparation method thereof, in particular to a high-crystallinity lithium manganese oxide material and a preparation method thereof, wherein the high-crystallinity lithium manganese oxide material is used for coating a lithium ion battery. The lithium manganese oxide material is obtained by being coated on a lithium manganese oxide precursor with the one-time crystal particle of 0.01-20mum and has the general formula of LiaMn2-b-cMbGcO4-d-eXdZe, wherein M and X are doped elements, G and Z are coating elements of which the concentration is distributed in a decreasing gradient from outside to inside, a is not less than 0.9 and is not more than 1.2, b is not less than 0 and is not more than 0.2, c is more than 0 and is not more than 0.2, d is not less than 0 and is not more than 0.2, and e is not less than 0 and is not more than 0.2. The material serves as the positive pole material of the lithium ion battery, has better normal-temperature and high-temperature cycle performance and excellent high-temperature storage performance, is simple in preparation and easy to operate, control and carry out industrial production.
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Description

technical field

[0001] The invention relates to a lithium manganate material and a preparation method thereof, in particular to a high-crystallinity lithium manganate material applied to the coating of a lithium ion battery and a preparation method thereof. Background technique

[0002] As an emerging power source, lithium-ion batteries have many advantages such as high voltage, high capacity, light weight, small size, safety and environmental protection, so they are widely used in mobile phones, notebook computers, digital products and other fields. Lithium cobaltate material has become the most common lithium ion cathode material on the market due to its simple preparation method and good material stability, but cobalt resources are scarce and the material is expensive, and cobalt has important applications in the electronic field and military, which is strategic resources, so its large-scale application is subject to certain restrictions.

[0003] Spinel lithium manganes...

Claims

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