Process for preparing lithium cobalt oxide of lithium-ion secondary battery cathode materials

A technology for secondary batteries and positive electrode materials, applied in secondary batteries, battery electrodes, circuits, etc., can solve the problems of reduced thermal stability, reduced battery capacity, reduced load performance, etc., and achieves improved high temperature characteristics and high discharge capacity. Effect
CN101694874AActive Publication Date: 2010-04-14NANTONG RESHINE NEW MATERIAL
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NANTONG RESHINE NEW MATERIAL
Publication Date
2010-04-14

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Abstract

The invention provides a process for preparing lithium cobalt oxide of lithium-ion secondary battery cathode materials. The process includes that cobalt oxide or hydroxyl cobalt oxide powders and lithium carbonate powders are mixed according to a lithium / cobalt molar ratio of 1.0-1.1 and calcined in an atmosphere containing oxygen at the temperature of 850-1100 DEG C; obtained mixture is calcined for 5-55 hours in the atmosphere containing oxygen at the temperature of 850-1100 DEG C; calcined products are naturally cooled to reach room temperature and then grinded; laser scattered grain size distribution measuring device is used for classifying; lithium cobalt oxide semi-finished products are obtained by selecting an average grain diameter D50 of 8-20 micrometers; and a device with high-speed shear strength function is used for conducting coating composition treatment process on the surfaces of the lithium cobalt oxide semi-finished products. The process has the advantages of low raw material cost, high volume energy density, good safety, fine charge-discharge cycle performance, high pressurizing density and superior productivity.
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Description

technical field

[0001] The present invention relates to a lithium cobaltate material with excellent characteristics in many aspects such as high volume energy density, safety, charge-discharge cycle, pressurized density and productivity, etc., by using cheap cobalt hydroxide or cobalt oxyhydroxide and lithium carbonate The method, especially a kind of preparation method of lithium cobaltate lithium ion secondary battery anode material. Background technique

[0002] In recent years, with the development of portable and wireless equipment, the demand for non-aqueous electrolyte secondary batteries such as lithium-ion secondary batteries with small size, light weight and high energy density has been increasing. As we all know, the positive electrode active material for this non-aqueous electrolyte secondary battery has LiCoO 2 , LiNiO 2 、LiNi 0.8 co 0.2 o 2 、LiNi 0.33 co 0.33 mn 0.33 o 2 , LiMn 2 o 4 、LiFePO 4 Composite oxides or phosphates of lithium and transition...

Claims

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