Method for preparing positive electrode material of anion-cation multi-component compound lithium battery

A multi-component composite and positive electrode material technology, applied in the direction of battery electrodes, circuits, electrical components, etc., to achieve the effect of improving the discharge platform, improving the performance of large rate performance, and good rate performance
CN101707248AActive Publication Date: 2010-05-12重庆特瑞新能源材料有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
重庆特瑞新能源材料有限公司
Publication Date
2010-05-12

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Abstract

The invention discloses a method for preparing a positive electrode material of an anion-cation multi-component compound lithium battery, which comprises the following steps of: performing ball-milling mixing on a substitute and a substrate raw material, adding at least one of water, ethanol and acetone serving as a ball-milling solvent into the mixture; performing spray drying to obtain a precursor; and sintering the spray-drying precursor under the protection of an inert atmosphere to finally obtain LiFe1-m(NixCoyMnz)mP1-nDnO4 positive electrode material of the lithium battery. The molecular formula of the material is LiFe1-m(NixCoyMnz)mP1-n-DnO4, wherein the Fe position is partially substituted by a ternary precursor (NixCoyMnz)(OH)2, and simultaneously the D at the P position uses a compound or a simple substance of boron, sulfur, silicon, chlorine, selenium, tellurium and tungsten and adopts a multi-component composite radical as a substitute to achieve the synergistic action of anions and cations or ion radicals so as to synchronously improve the ion diffusion and the electron conductivity of the material. The material prepared by the method has high charge and discharge capacities, good multiplying factor performance and good circle performance.
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Description

technical field

[0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a preparation method of a positive electrode material of a lithium ion battery. Background technique

[0002] With the increasing popularity of various portable electronic products, the battery as a portable power supply device has attracted increasing attention. my country has become a big country in battery production and consumption. The environment has caused great pollution. Facing the increasingly stringent requirements for environmental protection in the world, the development of green energy is imminent. High-performance rechargeable green lithium-ion secondary batteries have been widely used in various portable electronic products and communication tools in recent years, and have been gradually developed as power sources for electric vehicles. The performance and cost of lithium-ion batteries depend largely on the positive electrode material. F...

Claims

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