Invention Grant
- Patent Title: Negative electrode material for nonaqueous secondary batteries, negative electrode for nonaqueous secondary batteries, and nonaqueous secondary battery
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Application No.: US16419744Application Date: 2019-05-22
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Publication No.: US11961996B2Publication Date: 2024-04-16
- Inventor: Shunsuke Yamada , Nobuyuki Ishiwatari , Naoto Maru , Atsushi Watarai
- Applicant: MITSUBISHI CHEMICAL CORPORATION
- Applicant Address: JP Chiyoda-ku
- Assignee: MITSUBISHI CHEMICAL CORPORATION
- Current Assignee: MITSUBISHI CHEMICAL CORPORATION
- Current Assignee Address: JP Chiyoda-ku
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP 16227259 2016.11.22
- Main IPC: H01M4/36
- IPC: H01M4/36 ; H01M4/02 ; H01M4/38 ; H01M4/48 ; H01M4/587 ; H01M10/052 ; H01M10/0525 ; H01M10/0567

Abstract:
Provided are: a negative electrode material for nonaqueous secondary batteries, which can yield a high-capacity nonaqueous secondary battery having excellent discharge rate characteristics; and a negative electrode for nonaqueous secondary batteries and a nonaqueous secondary battery. Also provided is a nonaqueous secondary battery having excellent charge-discharge efficiency. The negative electrode material for nonaqueous secondary batteries includes carbonaceous particles (A) and silicon oxide particles (B), and satisfies the followings: a) the average particle size (50% cumulative particle size from the smaller particle side; d50) is 3 μm to 30 μm, and the 10% cumulative particle size from the smaller particle side (d10) is 0.1 μm to 10 μm; b) the ratio (R1=d90/d10) between the 90% cumulative particle size from the smaller particle side (d90) and the d10 is 3 to 20; and c) the ratio (R2=d50/d10) between the d50 and the d10 is 1.7 to 5.
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