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:
Oct. 14, 2025
Filed:
Feb. 24, 2022
Prime Planet Energy & Solutions, Inc., Tokyo, JP;
Yuta Matsuo, Kobe, JP;
Kaori Ishikawa, Nishinomiya, JP;
Kunihiko Hayashi, Miki, JP;
Masumi Terauchi, Koriyama, JP;
PRIME PLANET ENERGY & SOLUTIONS, INC., Tokyo, JP;
Abstract
A negative electrode active material is prepared by mixing a first graphite particle and a second graphite particle. A negative electrode including the negative electrode active material is produced. A non-aqueous electrolyte secondary battery including the negative electrode, a positive electrode, and an electrolyte solution is produced. The first graphite particle has a first number-based particle size distribution. The second graphite particle has a second number-based particle size distribution. A relationship of 'D50/D50≤0.50' is satisfied. D50 is a D50 in the first number-based particle size distribution. D50 is a D50 in the second number-based particle size distribution. A relationship of “R≤R” is satisfied. Ris an arithmetic mean of circularity of the first graphite particle. Ris an arithmetic mean of circularity of the second graphite particle.