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Preparation technology of spherical-like lithium cobalt material

A spherical lithium cobaltate, preparation technology, applied in the direction of cobalt compounds, inorganic chemistry, chemical instruments and methods, etc., can solve the problems of low tap density, unable to increase production capacity, unstable particle size Dmin, etc., and achieve increased material output , Guarantee the granulation effect and reduce the production cost

Active Publication Date: 2014-09-03
NANTONG RESHINE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: The present invention provides a preparation process of a spherical lithium cobalt oxide material to solve the technical problems of low tap density and unstable particle size Dmin in the prior art, as well as the technical problem that the production capacity cannot be increased

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0019] A preparation process for a spherical lithium cobaltate material, comprising the steps of:

[0020] (1), raw material ratio, dry mixing: mix cobalt oxide, lithium carbonate, and dopant in a weight ratio of 50:25:1, and the molar ratio of Li and Co after mixing is 0.9;

[0021] (2) Tablet granulation: Put the mixed material into the loading bin of the tablet machine, and simultaneously open the agitator in the loading bin, the inner screw of the feeding pipe, and the rollers, and then open the first valve, close the second valve and In the state of the third valve, the agitator in the loading bin starts to stir. When the second valve is opened and the third valve is closed, the material is conveyed through the screw. When the third valve is opened, the material passes through the rollers. The rollers are used for tableting, and when the tableting machine is working continuously, the counter-rollers are used for continuous tableting and granulation, so that the material b...

specific Embodiment 2

[0026] A preparation process for a spherical lithium cobaltate material, comprising the steps of:

[0027] (1) Raw material ratio, dry mixing: mix cobalt oxide, lithium carbonate, and dopant in a weight ratio of 50:25:1, and the molar ratio of Li and Co after mixing is 1.5;

[0028] (2) Tablet granulation: Put the mixed material into the loading bin of the tablet machine, and simultaneously open the agitator in the loading bin, the inner screw of the feeding pipe, and the rollers, and then open the first valve, close the second valve and In the state of the third valve, the agitator in the loading bin starts to stir. When the second valve is opened and the third valve is closed, the material is conveyed through the screw. When the third valve is opened, the material passes through the rollers. The rollers are used for tableting, and when the tableting machine is working continuously, the counter-rollers are used for continuous tableting and granulation, so that the material be...

specific Embodiment 3

[0033] A preparation process for a spherical lithium cobaltate material, comprising the steps of:

[0034] (1) Raw material ratio, dry mixing: mix cobalt oxide, lithium carbonate, and dopant in a weight ratio of 50:25:1, and the molar ratio of Li and Co after mixing is 1.3;

[0035] (2) Tablet granulation: Put the mixed material into the loading bin of the tablet machine, and simultaneously open the agitator in the loading bin, the inner screw of the feeding pipe, and the rollers, and then open the first valve, close the second valve and In the state of the third valve, the agitator in the loading bin starts to stir. When the second valve is opened and the third valve is closed, the material is conveyed through the screw. When the third valve is opened, the material passes through the rollers. The rollers are used for tableting, and when the tableting machine is working continuously, the counter-rollers are used for continuous tableting and granulation, so that the material be...

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Abstract

The invention discloses a preparation technology of a spherical-like lithium cobalt material. The preparation technology comprises the following steps: proportioning of raw materials, and dry type mixing; preforming and pelletizing; primary roasting; crushing and mixing; secondary roasting; sieving, deironing and packaging. The materials subjected to dry type mixing are preformed and pelletized through a preforming machine, air in the materials is emitted under the extrusion of a roller, and materials are changed into dense from fluffy, so that the bulk density of the materials is improved. When the preformed materials are subjected to primary roasting and charging, the charging amount of the primary roasting can be increased, and under the same roasting condition, the output of the materials is also obviously increased. Through preforming and pelletizing, the productivity of lithium cobalt oxide can be increased, and the production cost can also be lowered.

Description

technical field [0001] The invention specifically relates to a preparation process of a quasi-spherical lithium cobalt oxide material. Background technique [0002] At present, with the rapid development of portable electronic devices such as mobile phones, notebook computers, and digital cameras, the demand for renewable, high-energy, and long-life batteries in the energy market is increasing. Lithium-ion battery is the battery with the highest voltage and the largest energy density among the batteries that have been practical so far, and has a good development prospect. [0003] However, with the rapid development of smart phones, customers have higher and higher orders for lithium cobalt oxide materials and higher requirements for the density of materials. Therefore, further increasing the unit output of lithium cobalt oxide materials and improving the tap density of products further development direction. [0004] In view of this, it is indeed necessary to adjust and m...

Claims

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Application Information

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IPC IPC(8): C01G51/00
Inventor 周贵海李魁章建丰
Owner NANTONG RESHINE NEW MATERIAL
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