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:
Jul. 16, 2024
Filed:
May. 10, 2021
Murata Manufacturing Co., Ltd., Kyoto, JP;
Futoshi Sato, Tokyo, JP;
Yoshifumi Shimizu, Tokyo, JP;
Taichi Kogure, Tokyo, JP;
Aya Mashiko, Tokyo, JP;
Takaaki Matsui, Tokyo, JP;
Kazuki Honda, Tokyo, JP;
Keitaro Kitada, Tokyo, JP;
Yuta Hirano, Tokyo, JP;
Masayuki Iwama, Tokyo, JP;
Asuki Yanagihara, Tokyo, JP;
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
A secondary battery includes a positive electrode, a negative electrode, and an electrolytic solution. The positive electrode includes a lithium-cobalt composite oxide having a layered rock-salt crystal structure. The negative electrode includes graphite. A potential variation of the positive electrode is greater than or equal to 2 mV when the secondary battery is discharged from a full charge state by a capacity corresponding to 1% of a maximum discharge capacity. The maximum discharge capacity is a discharge capacity obtained when the secondary battery is discharged with a constant current from the full charge state until the closed circuit voltage reaches 3.00 V, following which the secondary battery is discharged with a constant voltage of the closed circuit voltage of 3.00 V for 24 hours.