Title:
POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM ION SECONDARY BATTERY AND MANUFACTURING METHOD THEREOF, AND LITHIUM ION SECONDARY BATTERY
Document Type and Number:
Japanese Patent JP2021005475
Kind Code:
A
Abstract:
To further improve the output characteristics of a positive electrode active material composed of a NMC ternary lithium nickel manganese cobalt-containing composite oxide with a hollow structure.SOLUTION: A manufacturing method of a positive electrode active material for a lithium ion secondary battery includes a dry mixing step of mixing a tungsten compound with a hollow structure lithium NMC-containing composite oxide as a base material to obtain a mixture, a water spray mixing step, and a drying step, and in the water spray mixing step, water spraying is performed at a water spray rate in the range of 50 ml/min to 100 ml/min while stirring at a peripheral speed of 5 m/sec to 10 m/sec using a vacuum drying mixer, and then mixing is continued for a time in the range of 20 to 120 minutes with stirring, and the mixture is allowed to stand for a time in the range of 30 to 180 minutes, and in the drying step, in a vacuum atmosphere, the mixture is dried under reduced pressure at a temperature in the range of 100°C to 200°C for a time in the range of 60 minutes to 180 minutes without stirring.SELECTED DRAWING: Figure 1
Inventors:
BONG SHUNKAI
HAYASHI TETSUTARO
HAYASHI TETSUTARO
Application Number:
JP2019117942A
Publication Date:
January 14, 2021
Filing Date:
June 25, 2019
Export Citation:
Assignee:
SUMITOMO METAL MINING CO
International Classes:
H01M4/525; C01G53/00; H01M4/36; H01M4/505
Domestic Patent References:
| JP2018186065A | 2018-11-22 | |||
| JP2019019047A | 2019-02-07 |
Foreign References:
| WO2019044338A1 | 2019-03-07 |
Attorney, Agent or Firm:
Kiwa Patent Office