Title:
TREATMENT METHOD OF POSITIVE ELECTRODE ACTIVE SUBSTANCE WASTE PRODUCT OF LITHIUM ION SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2020/090690
Kind Code:
A1
Abstract:
This method is for treating a lithium ion secondary battery positive electrode active substance waste product that contains cobalt, nickel, manganese and lithium, and involves: a carbon mixing step in which a powder-form positive electrode active substance waste product is mixed with carbon to obtain a mixture in which the ratio of the mass of the carbon is 10-30% of the total mass of the positive electrode active substance waste product and the carbon; a roasting step for roasting the mixture at a temperature of 600-800°C to obtain a roasted powder; a lithium dissolving step which involves a first dissolving process for dissolving the lithium in the roasted powder in water or a lithium-containing solution and a second dissolving process for dissolving the lithium in the residue obtained in the first dissolving process in water; and an acid leaching step in which the residue obtained in the lithium dissolving step is leached with acid.
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Inventors:
GODA TOMONARI (JP)
YAMADA KEISUKE (JP)
OKAJIMA NOBUAKI (JP)
YAMADA KEISUKE (JP)
OKAJIMA NOBUAKI (JP)
Application Number:
PCT/JP2019/042055
Publication Date:
May 07, 2020
Filing Date:
October 25, 2019
Export Citation:
Assignee:
JX NIPPON MINING & METALS CORP (JP)
International Classes:
H01M10/54; B09B5/00; C01G53/00; C22B3/04; C22B3/06; C22B5/10; C22B7/00; C22B23/00; C22B26/12; C22B47/00; H01M4/505; H01M4/525
Foreign References:
| JP2011094227A | 2011-05-12 | |||
| JP2011094228A | 2011-05-12 | |||
| JP2014055312A | 2014-03-27 | |||
| JP2010180439A | 2010-08-19 | |||
| US20110135547A1 | 2011-06-09 | |||
| JPS576457B2 | 1982-02-04 | |||
| JP4581553B2 | 2010-11-17 | |||
| JPS5535717B2 | 1980-09-16 |
Other References:
See also references of EP 3876337A4
Attorney, Agent or Firm:
AXIS PATENT INTERNATIONAL (JP)
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