Title:
METHOD FOR MANUFACTURING POSITIVE ELECTRODE ACTIVE MATERIAL
Document Type and Number:
Japanese Patent JP2021034357
Kind Code:
A
Abstract:
To provide a method for stably manufacturing a positive electrode active material capable of showing superior battery characteristics without causing a handling problem.SOLUTION: A method is arranged for manufacturing a positive electrode active material consisting of a lithium transition metal composite oxide manufactured by performing a thermal treatment on a mixture of a transition metal composite hydroxide of which the compositional formula is represented by e.g. NixMnyCozMt(OH)2+α (M is one or more additive elements selected from a group consisting of Mg, Ca, Al, Ti, V, Cr, Zr, Nb, Mo, Hf, Ta and W), and a lithium compound. In the method, the thermal treatment is performed preferably in a low-oxidization gas atmosphere of 20-30 vol.% in oxygen density in a low-temperature region of a threshold temperature or below within a range of 700°C up to 900°C, and it is performed in a high-oxidization gas atmosphere of 40 vol.% or higher in oxygen density in a high-temperature region above the predetermined threshold temperature.SELECTED DRAWING: Figure 1
Inventors:
AIDA TAIRA
SUGANUMA SHINSUKE
KATO TOSHIHIRO
SUGANUMA SHINSUKE
KATO TOSHIHIRO
Application Number:
JP2019157313A
Publication Date:
March 01, 2021
Filing Date:
August 29, 2019
Export Citation:
Assignee:
SUMITOMO METAL MINING CO
International Classes:
H01M4/525; C01G53/00; H01M4/131; H01M4/505
Domestic Patent References:
| JP2007257890A | 2007-10-04 |
Foreign References:
| WO2005048380A1 | 2005-05-26 | |||
| WO2016060105A1 | 2016-04-21 | |||
| KR20140087319A | 2014-07-09 | |||
| US20180026266A1 | 2018-01-25 |
Attorney, Agent or Firm:
Noriyuki Tsujikawa