Invention Grant
- Patent Title: Lithium ion secondary battery, positive electrode active material, positive electrode, electric tool, electric vehicle, and power storage system
- Patent Title (中): 锂离子二次电池，正极活性物质，正极，电动工具，电动车辆和蓄电系统
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Application No.: US13326013Application Date: 2011-12-14
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Publication No.: US09077036B2Publication Date: 2015-07-07
- Inventor: Masaharu Senoue , Kenichi Kawase , Takakazu Hirose , Masayuki Ihara
- Applicant: Masaharu Senoue , Kenichi Kawase , Takakazu Hirose , Masayuki Ihara
- Applicant Address: JP Tokyo
- Assignee: SONY CORPORATION
- Current Assignee: SONY CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: K&L Gates LLP
- Priority: JP2010-293269 20101228
- Main IPC: H01M4/485
- IPC: H01M4/485 ; H01M4/505 ; H01M4/525
Abstract:
A lithium ion secondary battery including a positive electrode; a negative electrode; and an electrolytic solution, wherein the positive electrode includes a first lithium composite oxide and a second lithium composite oxide expressed by following formula (1) as a positive electrode active material, and wherein the second lithium composite oxide has a charge capacity greater than the first lithium composite oxide Li1+a(NibM1cM21−b−c)1.5−0.5aO2 (1) wherein, M1 represents at least one selected from among elements of group 13 to group 15 in an extended periodic table of elements excluding boron B, or carbon C, or nitrogen N, M2 represents at least one selected from among elements of group 3 to group 12, and a, b, and c satisfy relationships of 0.95≦a≦1.05, 0
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