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:
Sep. 29, 2026
Filed:
Dec. 01, 2020
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Kenji Matsubara, Osaka, JP;
Masanobu Takeuchi, Osaka, JP;
Abstract
A negative electrode active material for aqueous secondary batteries, said negative electrode active material being applied to an aqueous secondary battery that uses an aqueous electrolyte solution containing water and a lithium salt, wherein: the negative electrode active material contains graphite; the graphite has a C—F bond group on the surface; if Iis the peak intensity at around 688 eV ascribed to a C—F bond and Iis the peak intensity at around 284 eV ascribed to a C—C bond in the XPS spectrum of the graphite as obtained by X-ray photoelectron spectroscopy, the ratio of the peak intensity Ito the peak intensity I(namely, the value of I/I) is from 0.1 to 7; and the BET specific surface area is from 0.5 m/g to 3.9 m/g.