リチウムニッケル含有複合酸化物とその製造方法、および、該リチウムニッケル含有複合酸化物を母材として用いたリチウムイオン二次電池用正極活物質とその製造方法

Title:

Document Type and Number:

Japanese Patent JP7271920

Kind Code:

B2

Abstract:

To provide a positive electrode active material including a lithium nickel-containing composite oxide coated with a compound containing W and Li, having excellent battery characteristic without marring the crystallinity, where a fine particle and/or coating of the compound containing W and Li is present on a surface of a primary particle.SOLUTION: A method for manufacturing a positive electrode active material for a lithium ion secondary battery comprises the step of preparing a lithium nickel-containing composite oxide by mixing a nickel compound and a lithium compound into a lithium-mixed material and then, increasing the temperature of the lithium-mixed material from a room temperature to a baking temperature equal to or higher than 700°C under an oxidizing atmosphere. In the preparing step, an eluted Li amount of a lithium nickel-containing composite oxide obtained under the condition of the passing time and/or holding time being set to be 45 minutes or a shorter time in a temperature region where the temperature of the lithium-mixed material is 600-650°C, followed by stirring and filtering the resultant mixture is in a range of 0.3 mass% to 0.5 mass%. The lithium nickel-containing composite oxide is used as a base material to form a fine particle and/or coating of a compound containing W and Li on the surface of a primary particle thereof.SELECTED DRAWING: None

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Inventors:

Tomoko Nakayama
Takahiro Toma
Takahiro Ogawa
Fisherman Kazuomi

Application Number:

JP2018223672A

Publication Date:

May 12, 2023

Filing Date:

November 29, 2018

Export Citation:

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Assignee:

Sumitomo Metal Mining Co., Ltd.

International Classes:

H01M4/525; H01M4/36; H01M4/505

Domestic Patent References:

JP2017084513A
JP2015216105A
JP11317230A
JP2011023121A
JP2012138352A

Foreign References:

WO2018043515A1
WO2018181402A1

Attorney, Agent or Firm:

Kiwa Patent Office

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