Method for preparation of lithium manganate having uniform spinel structure

A technology of spinel structure and manufacturing method, applied in electrode manufacturing, structural parts, chemical instruments and methods, etc., can solve problems such as uneven structure, achieve faster synthesis rate, improve porosity and specific surface area, and low production cost Effect
CN1547272AInactive Publication Date: 2004-11-17HUNAN JINGXIN TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUNAN JINGXIN TECH
Publication Date
2004-11-17
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention is a kind of lithium ion cell positive material, which concretely refers to a manufacturing method for a kind of lithium manganic acid material which has an even spinel structure. The invention uses high purity electrolyzation MnO2 or / and chemical MnO2 as materials, the MnO2 with multi-aperture skeleton can be acquired through baking in 500-1000oC, acid processed for 0.5-3 hours in 70-100 oC, the block beforehand mixture; then they are synthesized for 8-30 hours in air under temperature of 700-900 oC, the product can acquired after being cooled and grinded. The material has a large capacity, the electrochemical performance is stable, and the cost is low, especially applicable to the lithium ion cell.
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Description

【Technical field】

[0001] The invention belongs to the anode material of a lithium ion battery, in particular to a method for manufacturing lithium manganate with a uniform spinel structure. 【Background technique】

[0002] Lithium-ion battery is a chemical power source with superior performance widely used in recent years. Its positive electrode material is mainly an intercalation compound formed by lithium and transition metal element oxides. Among them, the lithium-ion battery has a large specific capacity, stable electrochemical performance, and low cost. Lithium manganese oxide (LiMn 2 o 4 ) has the most development potential as a cathode material.

[0003] Lithium manganate synthesis methods are commonly used solid-phase method and liquid-phase method. Among them, the solid-phase method is a solid-state manganese compound and a lithium compound that are fully ground and mixed, and synthesized at a high temperature for a long time. For example, the preparation method ...

Claims

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