Invention Grant
- Patent Title: Nonaqueous electrolyte secondary battery
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Application No.: US14427135Application Date: 2013-09-09
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Publication No.: US09660262B2Publication Date: 2017-05-23
- Inventor: Yasushi Uebo , Keisuke Anami
- Applicant: GS Yuasa International Ltd.
- Applicant Address: JP Kyoto
- Assignee: GS Yuasa International Ltd.
- Current Assignee: GS Yuasa International Ltd.
- Current Assignee Address: JP Kyoto
- Agency: Rankin, Hill & Clark LLP
- Priority: JP2012-199429 20120911
- International Application: PCT/JP2013/005333 WO 20130909
- International Announcement: WO2014/041793 WO 20140320
- Main IPC: H01M4/525
- IPC: H01M4/525 ; H01M4/505 ; H01M4/131 ; H01M4/36 ; H01M10/052 ; H01M4/485 ; H01M10/0525 ; H01M4/02

Abstract:
A positive electrode for a nonaqueous electrolyte secondary battery according to the present invention includes particles A of a lamellar type lithium transition metal oxide and particles B of a spinel type lithium transition metal oxide, as a positive active material, at a ratio within the range of A:B=20:80 to 80:20 (weight ratio), in which a particle size distribution of the positive active material has a peak based on the particles A and a peak based on the particles B within the range of 1 to 50 μm. In the integrated distribution curve of the particle diameter, a particle diameter A(D50) at a degree of accumulation of the particles A of 50% and a particle diameter B(D50) at a degree of accumulation of the particles B of 50% satisfy the following expression (1), and a particle diameter A(D95) at a degree of accumulation of the particles A of 95% and a particle diameter B(D5) at a degree of accumulation of the particles B of 5% satisfy the following expression (2): B(D50)−A(D50)≧5 μm Expression (1) B(D5)>A(D95) Expression (2).
Public/Granted literature
- US20150221944A1 NONAQUEOUS ELECTROLYTE SECONDARY BATTERY Public/Granted day:2015-08-06
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