Title:
LITHIUM METAL COMPOSITE OXIDE POWDER, POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERIES, POSITIVE ELECTRODE, AND LITHIUM SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2019/177023
Kind Code:
A1
Abstract:
A lithium metal composite oxide powder which is composed of primary particles only, or of the primary particles and secondary particles that are aggregates of the primary particles, and which is characterized in that the lithium metal composite oxide is represented by composition formula (1) and satisfies all the requirements (A), (B) and (C) described below.
(1): Li(Lix(Ni(1-y-z-w)CoyMnzMw)1-x)O2 (In the formula, M represents one or more metal elements selected from the group consisting of Fe, Cu, Ti, Mg, Al, W, B, Mo, Nb, Zn, Sn, Zr, Ga, La and V; -0.1 ≤ x ≤ 0.2; 0 ≤ y ≤ 0.4; 0 ≤ z ≤ 0.4; and 0 ≤ w ≤ 0.1.)
(A) The BET specific surface area is less than 2 m2/g.
(B) The average particle diameter of the primary particles is 1 μm or more.
(C) The ratio of the content (mass%) of alkali metals other than lithium to the sulfuric acid radical content (mass%) is 0.1 or more but less than 50.
Inventors:
TAKAMORI KENJI (JP)
KURODA TOMOYA (JP)
KURODA TOMOYA (JP)
Application Number:
PCT/JP2019/010275
Publication Date:
September 19, 2019
Filing Date:
March 13, 2019
Export Citation:
Assignee:
SUMITOMO CHEMICAL CO (JP)
International Classes:
H01M4/525; C01G53/00; H01M4/505
Domestic Patent References:
| WO2015182665A1 | 2015-12-03 |
Foreign References:
| JP2015026455A | 2015-02-05 | |||
| JPH10208728A | 1998-08-07 | |||
| JPH0456064A | 1992-02-24 | |||
| JP2017228516A | 2017-12-28 | |||
| JP2018045954A | 2018-03-22 | |||
| JP2015122269A | 2015-07-02 | |||
| JP2011124086A | 2011-06-23 | |||
| JP2002201028A | 2002-07-16 |
Other References:
See also references of EP 3767719A4
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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