Invention Grant
- Patent Title: Nonaqueous electrolyte battery and battery pack
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Application No.: US14644826Application Date: 2015-03-11
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Publication No.: US09692042B2Publication Date: 2017-06-27
- Inventor: Hiromichi Kuriyama , Hidesato Saruwatari , Tetsuro Kano , Yuki Watanabe , Norio Takami
- Applicant: Kabushiki Kaisha Toshiba
- Applicant Address: JP Minato-ku
- Assignee: KABUSHIKI KAISHA TOSHIBA
- Current Assignee: KABUSHIKI KAISHA TOSHIBA
- Current Assignee Address: JP Minato-ku
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2014-156469 20140731; JP2015-043902 20150305
- Main IPC: H01M2/24
- IPC: H01M2/24 ; H01M6/42 ; H01M4/131 ; H01M4/505 ; H01M10/0525 ; H01M4/525 ; H01M4/36 ; H01M4/02 ; H01M2/02 ; H01M4/485 ; H01M10/42

Abstract:
According to one embodiment, there is provided a nonaqueous electrolyte battery. The nonaqueous electrolyte battery includes a negative electrode, a positive electrode, and a nonaqueous electrolyte. An Li-atom abundance ratio ALi, Ti-atom abundance ratio ATi, and C-atom abundance ratio AC of a surface of the negative electrode satisfy inequalities 2≦AC/ATi≦10, and 1.0≦ALi/AC≦1.5. The positive electrode includes a nickel-cobalt-manganese composite oxide represented by a composition formula Li1−aNixCoyMnzO2. Subscripts x, y, and z satisfy an inequality 0.1≦x/(y+z)≦1.3, and subscript a satisfies an inequality 0≦a≦1. A ratio p/n of a capacity p of the positive electrode to a capacity n of the negative electrode is within a range of 1.2 to 2.
Public/Granted literature
- US20160036039A1 NONAQUEOUS ELECTROLYTE BATTERY AND BATTERY PACK Public/Granted day:2016-02-04
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