Title:
METHOD FOR PRODUCING POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM ION SECONDARY BATTERIES, POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM ION SECONDARY BATTERIES, AND LITHIUM ION SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2020/171088
Kind Code:
A1
Abstract:
A method for producing a positive electrode active material for lithium ion secondary batteries, which comprises a mixing step for obtaining a tungsten mixture by heating and mixing starting materials that are a lithium nickel composite oxide and a tungsten compound powder that does not contain lithium, and a heat treatment step for subjecting the tungsten mixture to a heat treatment, and which is configured such that: the lithium nickel composite oxide contains Li, Ni and an element M; the ratio of the number of tungsten atoms to the total of the number of nickel atoms and the number of element M atoms contained in the lithium nickel composite oxide in the starting materials is from 0.05% by atom to 3.00% by atom (inclusive); the water content that is the ratio of water in the lithium nickel composite oxide and water in the starting materials is 3.0% by mass or more; and the temperature during the mixing step is from 30°C to 65°C (inclusive).
Inventors:
SUZUKI JUN (JP)
Application Number:
PCT/JP2020/006360
Publication Date:
August 27, 2020
Filing Date:
February 18, 2020
Export Citation:
Assignee:
SUMITOMO METAL MINING CO (JP)
International Classes:
H01M4/505; H01M4/36; H01M4/525
Domestic Patent References:
| WO2016017783A1 | 2016-02-04 |
Foreign References:
| JP2017063003A | 2017-03-30 | |||
| CN107623124A | 2018-01-23 | |||
| JP2013144625A | 2013-07-25 | |||
| JP2015227263A | 2015-12-17 |
Attorney, Agent or Firm:
ITOH, Tadashige et al. (JP)
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