Title:
METHOD FOR MANUFACTURING CATHODE ACTIVE MATERIAL FOR LITHIUM-ION SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2020/026687
Kind Code:
A1
Abstract:
[Problem] To provide a cathode active material that is capable of reducing the cathode resistance of a secondary battery by enhancing the electron conductivity thereof without reducing the discharge capacity of the secondary battery. [Solution] A cathode-active-material manufacturing method according to the present invention includes: obtaining a lithium mixture by mixing transition-metal-containing composite compound particles containing lanthanum with a lithium compound; calcinating said lithium mixture at a temperature that is at or below the melting point of the lithium compound; and, subsequently, firing the lithium mixture at a firing temperature in a range of 725-1000ºC. It is preferable that lithium carbonate be used as the lithium compound, and, in that case, that the calcinating temperature be set in a range of 600-723ºC. It is preferable that the transition-metal-containing composite compound particles containing lanthanum be obtained by means of a coprecipitation method, thus uniformly dispersing the lanthanum element in the particles.
Inventors:
KANADA SATOSHI (JP)
HAYASHI TETSUTARO (JP)
HAYASHI TETSUTARO (JP)
Application Number:
PCT/JP2019/026508
Publication Date:
February 06, 2020
Filing Date:
July 03, 2019
Export Citation:
Assignee:
SUMITOMO METAL MINING CO (JP)
International Classes:
H01M4/36; C01G53/00; H01M4/505; H01M4/525
Domestic Patent References:
| WO2014049931A1 | 2014-04-03 | |||
| WO2014156054A1 | 2014-10-02 | |||
| WO2015125444A1 | 2015-08-27 |
Foreign References:
| JP2010108899A | 2010-05-13 |
Attorney, Agent or Firm:
KIWA INTERNATIONAL (JP)
Download PDF: