Invention Grant
- Patent Title: Positive electrode for nonaqueous electrolyte secondary battery and nonaqueous electrolyte secondary battery that uses the positive electrode
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Application No.: US14654142Application Date: 2014-01-23
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Publication No.: US10128495B2Publication Date: 2018-11-13
- Inventor: Taiki Satow , Takao Kokubu , Taizou Sunano , Takeshi Ogasawara
- Applicant: SANYO Electric Co., Ltd.
- Applicant Address: JP Daito-shi, Osaka
- Assignee: SANYO Electric Co., Ltd.
- Current Assignee: SANYO Electric Co., Ltd.
- Current Assignee Address: JP Daito-shi, Osaka
- Agency: Westerman, Hattori, Daniels & Adrian, LLP
- Priority: JP2013-038065 20130228
- International Application: PCT/JP2014/000328 WO 20140123
- International Announcement: WO2014/132550 WO 20140904
- Main IPC: H01M4/36
- IPC: H01M4/36 ; H01M4/505 ; H01M4/525 ; H01M4/58 ; H01M4/1315 ; H01M4/485 ; H01M10/0525 ; H01M4/38 ; H01M10/052 ; H01M4/02

Abstract:
A positive electrode for a nonaqueous electrolyte secondary battery that does not undergo a decrease in discharge capacity in low-temperature discharge during charge and discharge after the battery is left standing at high temperature in a charged state, for example. The positive electrode for a nonaqueous electrolyte secondary battery includes a positive electrode active material. The positive electrode active material includes a mixture of lithium nickel cobalt manganate and lithium cobaltate having a compound adhered to part of a surface thereof, the compound containing fluorine and at least one selected from zirconium, magnesium, titanium, aluminum, and a rare earth element; and a ratio of the lithium nickel cobalt manganate relative to a total amount of the positive electrode active material is 1% by mass or more and less than 70% by mass.
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