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:
Nov. 22, 2022
Filed:
Aug. 31, 2020
Kabushiki Kaisha Toshiba, Tokyo, JP;
Keigo Hoshina, Yokohama Kanagawa, JP;
Nen Zhang, Sagamihara Kanagawa, JP;
Tetsuya Sasakawa, Yokohama Kanagawa, JP;
Yasuhiro Harada, sehara Kanagawa, JP;
Norio Takami, Yokohama Kanagawa, JP;
KABUSHIKI KAISHA TOSHIBA, Tokyo, JP;
Abstract
According to one embodiment, provided is a secondary battery including a positive electrode, a negative electrode, and an electrolyte. The negative electrode includes a niobium-titanium composite oxide having fluorine atoms on at least part of a surface the niobium-titanium composite oxide. An abundance ratio Aof fluorine atoms, an abundance ratio Aof titanium atoms, and an abundance ratio Aof niobium atoms on a surface of the negative electrode according to X-ray photoelectron spectroscopy satisfy a relationship of 3.5≤A/(A+A)≤50.