Cathode active material, non-aqueous electrolyte secondary battery using the same, and manufacturing method of cathode active material
A positive electrode active material and manufacturing method technology, applied in non-aqueous electrolyte storage batteries, active material electrodes, secondary batteries, etc., can solve the problems of cycle characteristics deterioration and short circuit of secondary batteries, and achieve excellent charge/discharge cycle characteristics, high The effect of capacity
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
example
[0112] Specific examples of the present invention will be described below. However, the present invention is not limited to these examples.
example 1
[0114] First, the analytical value of the average chemical composition of 20 parts by weight is Li 1.03 co 0.98 al 0.01 Mg 0.01 o 2.02 And lithium cobaltate having an average diameter equal to 13 μm measured by a laser light scattering method was stirred and dispersed in 300 parts by weight of pure water at 80° C. for 1 hour.
[0115] Thereafter, 1.85 parts by weight of nickel nitrate Ni(NO 3 ) 2 ·6H 2 O and 1.83 parts by weight of manganese nitrate Mn(NO 3 ) 2 ·6H 2 O was added to the obtained solution. A 2N aqueous LiOH solution was further added for 30 minutes until the pH reached 13. Agitation-dispersion was continued at 80° C. for 3 hours, and then, the obtained solution was cooled.
[0116] Next, the above dispersed system was decanted-purified and dried at 120° C., thereby obtaining a precursor sample in which hydroxide had been formed on the surface. Then, in order to adjust the amount of lithium, 2 parts by weight of a 2N LiOH aqueous solution was impregna...
example 2
[0122] First, 20 parts by weight of lithium cobaltate used in Example 1 was stirred and dispersed in 300 parts by weight of a 2N LiOH aqueous solution at 80°C. Next, by adding pure water to 0.927 parts by weight of nickel nitrate Ni(NO 3 ) 2 ·6H 2 O and 0.915 parts by weight of manganese nitrate Mn(NO 3 ) 2 ·6H 2 O (similar to Example 1) to form an aqueous solution of 10 parts by weight. 10 parts by weight of an aqueous solution was added to the obtained solution in its entirety over 30 minutes. Stirring-dispersion was continued at 80° C. for 3 hours, and then, the obtained solution was cooled.
[0123]Thereafter, the above dispersion system was filtered and dried at 120° C., thereby obtaining a precursor sample in which hydroxide had been formed on the surface. Then, the precursor sample was heated at a rate of 5°C / min by using an electric furnace, kept at 950°C for 8 hours, and then cooled to 150°C at a rate of 7°C / min, thereby obtaining the positive electrode active ...
PUM
| Property | Measurement | Unit |
|---|---|---|
| diameter | aaaaa | aaaaa |
| diameter | aaaaa | aaaaa |
| diameter | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More