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:
Jun. 16, 2026
Filed:
Aug. 19, 2021
Sanyo Electric Co., Ltd., Kadoma, JP;
Nobuhiro Sakitani, Tokushima, JP;
Koki Morita, Tokushima, JP;
Shun Nomura, Osaka, JP;
Hiroyuki Fujimoto, Osaka, JP;
SANYO Electric Co., Ltd., Osaka, JP;
Abstract
A nonaqueous electrolyte secondary battery provided with a positive electrode, a negative electrode and a nonaqueous electrolyte. An electrode mixture layer of the positive electrode contains: first lithium metal composite oxide particles that are non-aggregated particles which have a volume-based median diameter of from 2 μm to 10 μm; and second lithium metal composite oxide particles that are secondary particles, in each of which primary particles having an average particle diameter of from 50 nm to 2 μm aggregate, and which have a volume-based median diameter of from 10 μm to 30 μm. With a first region and the second region sequentially halved from the surface side of the positive electrode mixture layer, the content of the first lithium metal composite oxide particles in the first region is higher than the content of the first lithium metal composite oxide particles in the second region.