Title:
POSITIVE ELECTRODE COMPOSITE ACTIVE MATERIAL AND METHOD FOR PRODUCING POSITIVE ELECTRODE COMPOSITE ACTIVE MATERIAL
Document Type and Number:
WIPO Patent Application WO/2023/149363
Kind Code:
A1
Abstract:
The present invention provides: a positive electrode composite active material which comprises a cover layer that is uniform in comparison to conventional ones, and which is capable of suppressing the generation of a gas due to decomposition of a nonaqueous electrolyte solution; and a method for producing a positive electrode composite active material. A positive electrode composite active material according to the present invention comprises an oxide active material and a cover layer which covers the surface of the oxide active material; the oxide active material is configured from a lithium manganese oxide having a spinel crystal structure; the cover layer is configured from a phosphate compound that is represented by formula (1); and the cover layer has a thickness of 5 nm to 20 nm. (1): LiaAbDcPO4
(In formula (1), a, b and c satisfy 0.9 < a < 1.1, 0 < b ≤ 1 and 0 ≤ c < 1, and 0.9 < b + c < 1.1; A represents at least one element that is selected from the group consisting of Co, Mn, Ni, Fe, Cu and Cr; and D represents at least one element that is selected from the group consisting of Mg, Ca, Sr, Ba, Ti, Zn, B, Al, Ga, In, Si, Ge, Sc and Y.)
Inventors:
IMAIZUMI JUNICHI (JP)
KIKUCHI TAKASHI (JP)
IMAZAKI MITSUYASU (JP)
KIKUCHI TAKASHI (JP)
IMAZAKI MITSUYASU (JP)
Application Number:
PCT/JP2023/002566
Publication Date:
August 10, 2023
Filing Date:
January 27, 2023
Export Citation:
Assignee:
KANEKA CORP (JP)
International Classes:
H01M4/505; H01M4/36; H01M4/525
Foreign References:
| JP2018116856A | 2018-07-26 | |||
| JP2021136206A | 2021-09-13 | |||
| JP2007103339A | 2007-04-19 | |||
| JP2016170942A | 2016-09-23 | |||
| JP2011502332A | 2011-01-20 | |||
| JP2013191540A | 2013-09-26 | |||
| CN112514109A | 2021-03-16 |
Attorney, Agent or Firm:
FUJITA Takashi et al. (JP)
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