Invention Grant
- Patent Title: Positive electrode active material for nonaqueous electrolyte secondary batteries, production method thereof, and nonaqueous electrolyte secondary battery
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Application No.: US15754747Application Date: 2016-08-25
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Publication No.: US11223033B2Publication Date: 2022-01-11
- Inventor: Hiroko Oshita , Kazuomi Ryoshi
- Applicant: SUMITOMO METAL MINING CO., LTD.
- Applicant Address: JP Tokyo
- Assignee: SUMITOMO METAL MINING CO., LTD.
- Current Assignee: SUMITOMO METAL MINING CO., LTD.
- Current Assignee Address: JP Tokyo
- Agency: Western, Hattori, Daniels & Adrian, LLP
- Priority: JPJP2015-167529 20150827
- International Application: PCT/JP2016/074842 WO 20160825
- International Announcement: WO2017/034000 WO 20170302
- Main IPC: H01M4/04
- IPC: H01M4/04 ; H01M4/131 ; H01M4/1391 ; H01M4/525 ; H01M10/0525 ; H01M10/0568 ; H01M4/02
Abstract:
Provided is a positive electrode active material for nonaqueous electrolyte secondary batteries that suppresses the gelling of a positive electrode mixture material paste and has high weather resistance, a production method thereof, and the like.
A method for producing a positive electrode active material for nonaqueous electrolyte secondary batteries includes cleaning a powder formed of a lithium-nickel composite oxide represented by a general formula LizNi1-x-yCoxMyO2 where 0≤x≤0.35; 0≤y≤0.10; 0.95≤z≤1.10; and M is at least one element selected from Mn, V, Mg, Mo, Nb, Ti, and Al with an aqueous lithium carbonate solution and drying the cleaned powder.
A method for producing a positive electrode active material for nonaqueous electrolyte secondary batteries includes cleaning a powder formed of a lithium-nickel composite oxide represented by a general formula LizNi1-x-yCoxMyO2 where 0≤x≤0.35; 0≤y≤0.10; 0.95≤z≤1.10; and M is at least one element selected from Mn, V, Mg, Mo, Nb, Ti, and Al with an aqueous lithium carbonate solution and drying the cleaned powder.
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