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:
Feb. 17, 2026
Filed:
Jul. 28, 2020
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Kazuhiro Iida, Nara, JP;
Masanobu Takeuchi, Osaka, JP;
Abstract
This secondary battery comprises a positive electrode, a negative electrode, and an electrolyte. The electrolyte contains a solvent containing water, and a lithium salt. The negative electrode has a negative electrode active material that contains a carbon material. In the carbon material, the peak intensity ratio (D/G value) of a D band and a G band in the Raman spectrum obtained using Raman spectroscopy is 0.9 to 1.5. A coating is formed on the surface of the carbon material. In the coating, in the XPS spectrum measured using X-ray photoelectron spectroscopy, when the peak intensity of a 1s electron orbit of an F atom for which the binding energy appears near 685 eV is P1, and the peak intensity of the 1s electron orbit of an O atom for which the binding energy appears near 532 eV is P2, the ratio of the peak intensity P1 to the peak intensity P2 (P1/P2 value) is 0.6 to 3.0.