- Patent Title: Positive electrode active material for lithium ion secondary battery, and lithium ion secondary battery positive electrode and lithium ion secondary battery using the same
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Application No.: US15438011Application Date: 2017-02-21
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Publication No.: US10211456B2Publication Date: 2019-02-19
- Inventor: Hideaki Seki , Akinobu Nojima
- Applicant: TDK CORPORATION
- Applicant Address: JP Tokyo
- Assignee: TDK CORPORATION
- Current Assignee: TDK CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Oliff PLC
- Priority: JP2016-067805 20160330; JP2016-250327 20161226
- Main IPC: H01M4/36
- IPC: H01M4/36 ; H01M4/505 ; H01M4/525 ; H01M4/58 ; H01M10/0525 ; H01M4/13
Abstract:
A positive electrode active material for a lithium ion secondary battery contains: a first compound represented by chemical formula Lix(NiyMa1-y)O2 (0.95≤x≤1.05, 0.70≤y≤0.95, where Ma is at least one element selected from Co, Mn, V, Ti, Fe, Zr, Nb, Mo, Al, and W); and a second compound represented by chemical formula LiVOPO4. W>5.0° C., where W is a full width at half maximum of an exothermic peak obtained between 150° C. and 260° C. by differential scanning calorimetry (DSC) performed on a mixture of the first compound and the second compound under a condition of 5° C./min.
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