Metal oxide cathode materials with improved performance

一种氧化物阴极、阴极材料的技术，应用在活性物质电极、化学/物理过程、化学/物理/物理化学过程等方向，能够解决材料额定容量低、容量损失大、方法太贵等问题
CN101043076APending Publication Date: 2007-09-26FARASIS ENERGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
FARASIS ENERGY
Publication Date
2007-09-26

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Abstract

The invention relates to a modified Li1+xMn2-x-yMyO4 (x is no less than 0 and no more than 0.5, y is no less than 0 and no more than 1) spinelle positive polar material for a non-water lithium battery and storage battery with improved cycle life and capacity, in particular to a method with low cost and high efficiency for providing the galaxite cathode material with protective coating or local coating through using a lithium and / or transition metal contained substance to dispose the galaxite cathode material, a cathode material made by the method and a lithium ion battery made from the cathode material. The method comprises the steps of: providing powder lithium transition metal oxide cathode material; mixing the powder lithium transition metal oxide cathode material with metal salt of a transition metal oxide surface treatment phase without adding liquid phase; burning the mixture to form the transition metal oxide surface treatment phase without drying in advance.
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Description

technical field

[0001] The present invention relates to a method for efficiently and uniformly coating lithium metal oxide cathode materials to enhance the performance of lithium-ion batteries. More specifically, the present invention relates to a method of coating lithium manganese oxide spinel with a second lithium-containing metal oxide phase using dry blending and secondary firing to prepare Methods and specific procedures for materials with longer cycle life. Background technique

[0002] Lithium-ion batteries have become very attractive for portable electronic devices such as cell phones and laptops because they offer higher energy density than other charging systems. Current commercial Li-ion batteries have lithiated carbon anodes or anodes Li x C 6 , and lithium cobalt oxide cathode or cathode LiCoO 2 . During battery charge and discharge, lithium ions are passed back and forth between the anode and cathode and become embedded in the host structure. The most co...

Claims

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