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:
May. 18, 2021
Filed:
Sep. 25, 2014
The University of Tokyo, Tokyo, JP;
Kabushiki Kaisha Toyota Jidoshokki, Kariya, JP;
Atsuo Yamada, Tokyo, JP;
Yuki Yamada, Tokyo, JP;
Yoshihiro Nakagaki, Kariya, JP;
Tomoyuki Kawai, Kariya, JP;
Yuki Hasegawa, Kariya, JP;
Kohei Mase, Kariya, JP;
Nobuhiro Goda, Kariya, JP;
THE UNIVERSITY OF TOKYO, Tokyo, JP;
KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, Kariya, JP;
Abstract
An electrolytic solution of a nonaqueous electrolyte secondary battery contains a metal salt, and an organic solvent having a heteroatom and satisfies Is>Io, when an intensity of an original peak of the solvent is represented as Io and an intensity of a peak resulting from shifting of the original peak is represented as Is. For the negative electrode, (1) a graphite whose G/D ratio of G-band and D-band peaks in a Raman spectrum is not lower than 3.5; (2) a carbon material whose crystallite size, calculated from a half width of a peak appearing at 2θ=20 degrees to 30 degrees in a X-ray diffraction profile is not larger than 20 nm; (3) silicon element and/or tin element; (4) a metal oxide configured to occlude and release lithium ions; or (5) a graphite whose ratio (long axis/short axis) is 1 to 5.