Title:
METHOD FOR MANUFACTURING POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM ION SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2022/202066
Kind Code:
A1
Abstract:
[Problem] To provide a method which is for manufacturing a positive electrode active material for a lithium ion secondary battery, and by which the solid-phase reaction of a precursor is uniformly promoted to suppress the elution amount of lithium carbonate. [Solution] This method for manufacturing a positive electrode active material for a lithium ion secondary battery involves reacting at least 95 mass% of a lithium compound through a heat treatment step using a rotary firing furnace and having a batch firing process for heating a precursor while rolling the same in a heating region in a furnace tube, wherein the batch firing process has: a tilted input stage for tilting the furnace tube and inputting the precursor from an inlet of the firing furnace; a horizontal firing stage for performing firing while making the furnace tube horizontal; and a tilted discharge stage for tilting the furnace tube and discharging a fired body from an outlet of the firing furnace.
Inventors:
TAKANO SHUICHI (JP)
TOKORO HISATO (JP)
GUNJI AKIRA (JP)
TAKAHASHI SHIN (JP)
TOKORO HISATO (JP)
GUNJI AKIRA (JP)
TAKAHASHI SHIN (JP)
Application Number:
PCT/JP2022/007418
Publication Date:
September 29, 2022
Filing Date:
February 22, 2022
Export Citation:
Assignee:
HITACHI METALS LTD (JP)
International Classes:
C01G53/00; F27B7/12; F27B7/14; H01M4/505; H01M4/525
Domestic Patent References:
| WO2009098835A1 | 2009-08-13 | |||
| WO2017213002A1 | 2017-12-14 |
Foreign References:
| JP2019160801A | 2019-09-19 | |||
| JP2013155989A | 2013-08-15 | |||
| JPH11255541A | 1999-09-21 | |||
| JP2005067972A | 2005-03-17 | |||
| JP2021153028A | 2021-09-30 | |||
| JP2002277166A | 2002-09-25 | |||
| JPH11139829A | 1999-05-25 |
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