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:
Apr. 16, 2024
Filed:
Oct. 31, 2018
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Sophia School Corporation, Tokyo, JP;
Shinobu Okayama, Miyoshi, JP;
Hiroyuki Yamaguchi, Susono, JP;
Kyoko Kikuchi, Okazaki, JP;
Masahiro Fujita, Kokubunji, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
SOPHIA SCHOOL CORPORATION, Tokyo, JP;
Abstract
A method of producing a lithium-ion secondary battery includes the following (α) and (β): (α) preparing a lithium-ion secondary battery, the lithium-ion secondary battery including at least a positive electrode, a negative electrode, and an electrolyte solution; and (β) adding a zwitterionic compound to the electrolyte solution. The negative electrode includes at least a negative electrode active material and a film. The film is formed on a surface of the negative electrode active material. The film contains a lithium compound. The zwitterionic compound contains a phosphonium cation or an ammonium cation and a carboxylate anion in one molecule.