The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 16, 2024
Filed:
May. 22, 2019
Mitsubishi Chemical Corporation, Chiyoda-ku, JP;
Shunsuke Yamada, Chiyoda-ku, JP;
Nobuyuki Ishiwatari, Chiyoda-ku, JP;
Naoto Maru, Chiyoda-ku, JP;
Atsushi Watarai, Chiyoda-ku, JP;
MITSUBISHI CHEMICAL CORPORATION, Chiyoda-ku, JP;
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.