Composite anode material of high-voltage lithium ion battery and lithium ion battery

A composite cathode material, lithium-ion battery technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of poor high-temperature storage performance and low discharge capacity, and achieve high discharge capacity, high volume energy density, and excellent cycle. effect on performance and high temperature storage performance
CN102891307AActive Publication Date: 2013-01-23DONGGUAN AMPEREX TECH +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DONGGUAN AMPEREX TECH
Publication Date
2013-01-23

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Abstract

The invention discloses a composite anode material of a lithium ion battery. The composite anode material has a core-shell structure, a core layer material is Li1+nAwNi0.5+xCo0.2+yMn0.3+zO2, a shell layer material is Li1+aCo1-bMbO2, and the shell layer material accounts for 0.1-20% of the composite anode material in mass percent. Compared with the prior art, the composite anode material disclosed by the invention has the advantages that because a cladding layer can exert effective gram volume and discharge voltage platform under high voltage, the energy density of the battery is improved, and in addition, the structural stability of an enhancement matrix material of the cladding layer is good for effectively inhibiting the dissolution of Mn among the materials in a cyclic process, and the oxidation of electrolyte by the anode material is reduced; and in addition, the invention further discloses a preparation method of the anode material and the lithium ion battery containing the anode material.
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Description

technical field

[0001] The invention relates to the field of lithium-ion batteries, in particular to lithium-ion batteries and a high-voltage lithium-ion battery composite positive electrode material using a core-shell structure. Background technique

[0002] Lithium-ion batteries generally include: a positive electrode sheet, a negative electrode sheet, a separator spaced between the positive and negative electrode sheets, and an electrolyte, wherein the positive electrode sheet includes a positive electrode collector and a positive electrode material distributed on the positive electrode collector, and the negative electrode sheet includes The negative electrode collector and the negative electrode material distributed on the negative electrode collector. At present, the commonly used lithium-ion cathode material is LiCoO 2 、LiNi 0.5 co 0.2 mn 0.3 o 2 , LiMn 2 o 4 、LiFePO 4 Wait.

[0003] The above several cathode materials have their own defects, such as LiCoO 2...

Claims

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