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:
Aug. 05, 2025
Filed:
Jul. 05, 2019
Lithium secondary battery including porous films laminated on a negative electrode current collector
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Tomohiro Harada, Osaka, JP;
Abstract
A lithium secondary battery, including: a positive electrode; a negative electrode; a non-aqueous electrolyte having lithium ion conductivity; and a separator interposed between the positive electrode and the negative electrode. The positive electrode includes a positive electrode mixture layer containing a positive electrode active material, and a positive electrode current collector. The positive electrode active material includes a composite oxide containing lithium and a transition metal. A molar ratio: M/Mof a total lithium amount per unit area Min the positive electrode and the negative electrode to a transition metal amount per unit area Min the positive electrode is 1.1 or less. The negative electrode includes a negative electrode current collector, and a plurality of porous films laminated on the negative electrode current collector and having electrically insulating properties.