- Patent Title: Anode material for lithium ion secondary battery, method of producing anode material for lithium ion secondary battery, anode for lithium ion secondary battery, and lithium ion secondary battery
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Application No.: US16611983Application Date: 2018-01-29
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Publication No.: US11605818B2Publication Date: 2023-03-14
- Inventor: Motohiro Isaka , Hideyuki Tsuchiya , Kento Hoshi , Tsutomu Satoh , Keita Suga
- Applicant: Hitachi Chemical Company, Ltd.
- Applicant Address: JP Tokyo
- Assignee: Hitachi Chemical Company, Ltd.
- Current Assignee: Hitachi Chemical Company, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Fitch, Even, Tabin & Flannery, LLP
- Priority: WOPCT/JP2017/017959 20170511
- International Application: PCT/JP2018/002799 WO 20180129
- International Announcement: WO2018/207410 WO 20181115
- Main IPC: H01M4/587
- IPC: H01M4/587 ; H01M10/0525 ; H01M4/02

Abstract:
An anode material for a lithium ion secondary battery including a carbon material satisfying the following (1) to (3), (6), and (7): (1) an average particle size (D50) is 22 μm or less, (2) D90/D10 of particle sizes is 2.2 or less, (3) a linseed oil absorption amount is 50 mL/100 g or less, (6) a portion of the carbon material with a sphericity of from 0.6 to 0.8 and a particle size of from 10 μm to 20 μm is 5% by number or more, and (7) a portion of the carbon material with the sphericity of 0.7 or less and a particle size of 10 μm or less is 0.3% by number or less.
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