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:
Dec. 22, 2020
Filed:
Aug. 31, 2018
Kabushiki Kaisha Toshiba, Minato-ku, JP;
Hayato Seki, Saitama, JP;
Yumiko Sekiguchi, Kawasaki, JP;
Kazuomi Yoshima, Yokohama, JP;
Yasuyuki Hotta, Tokyo, JP;
Shinsuke Matsuno, Tokyo, JP;
Norio Takami, Yokohama, JP;
KABUSHIKI KAISHA TOSHIBA, Minato-ku, JP;
Abstract
A secondary battery including an aqueous electrolyte, a positive electrode, and a negative electrode. The negative electrode includes a negative electrode active material which contains a Ti-containing composite oxide. At least one element A selected from Hg, Pb, Zn, and Bi is present on a surface of the negative electrode. An average of molar ratios (A/(A+Ti)) of the element A ranges from 5% to 40%. Each of the molar ratios is a molar amount of the element A to a sum between the molar amount of the element A and a molar amount of Ti on the surface of the negative electrode, according to scanning electron microscopy-energy dispersive X-ray spectroscopy.