Invention Grant
- Patent Title: Nonaqueous electrolyte secondary battery
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Application No.: US18340986Application Date: 2023-06-26
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Publication No.: US12159967B2Publication Date: 2024-12-03
- Inventor: Koichi Nishio , Jungmin Kim
- Applicant: Mitsubishi Chemical Corporation , MU IONIC SOLUTIONS CORPORATION
- Applicant Address: JP Tokyo; JP Tokyo
- Assignee: Mitsubishi Chemical Corporation,MU IONIC SOLUTIONS CORPORATION
- Current Assignee: Mitsubishi Chemical Corporation,MU IONIC SOLUTIONS CORPORATION
- Current Assignee Address: JP Tokyo; JP Tokyo
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2017-155379 20170810
- Main IPC: H01M4/00
- IPC: H01M4/00 ; H01M4/36 ; H01M4/525 ; H01M4/62 ; H01M10/052 ; H01M10/0567 ; H01M10/0569 ; H01M4/02

Abstract:
Provided is a nonaqueous electrolyte secondary battery, including a positive electrode with a positive electrode active material capable of absorbing and releasing a metal ion; a negative electrode with a negative electrode active material capable of absorbing and releasing a metal ion; and a nonaqueous electrolyte solution; wherein the positive electrode active material includes a lithium transition metal compound, and the positive electrode active material includes at least Ni, Mn and Co, wherein the molar ratio of Mn/(Ni+Mn+Co) is larger than 0 and not larger than 0.28, the molar ratio of Ni/(Ni+Mn+Co) is 0.45 or more, the plate density of the positive electrode is 3.3 g/cm3 or more; and the nonaqueous electrolyte solution includes a monofluorophosphate and/or a difluorophosphate. A total content of the monofluorophosphate and/or difluorophosphate is 0.01% by mass or more in terms of the concentration in the nonaqueous electrolyte solution.
Public/Granted literature
- US20230343990A1 NONAQUEOUS ELECTROLYTE SECONDARY BATTERY Public/Granted day:2023-10-26
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