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:
Jun. 01, 2021
Filed:
Dec. 10, 2018
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Kenta Ishii, Seto, JP;
Masahiro Morita, Nagoya, JP;
Risa Sato, Toyota, JP;
Ryo Hanasaki, Toyota, JP;
Yusuke Onoda, Toyota, JP;
Koji Takahata, Nissin, JP;
Atsushi Watarai, Tokyo, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
Abstract
According to the present disclosure, there is provided a technique making it possible to improve suitably the performance of a nonaqueous electrolyte secondary cell in which a SEI film is formed on the surface of a negative electrode active material. The nonaqueous electrolyte secondary cell disclosed herein includes a positive electrode, a negative electrode, and a nonaqueous electrolytic solution, wherein a negative electrode SEI filmincluding at least a LiBOB skeleton and a fluorosulfonic acid skeleton is formed on the surface of a negative electrode active material, and a positive electrode SEI filmincluding at least a phosphoric acid skeleton is formed on the surface of a positive electrode active material. Where the component amount of the LiBOB skeleton in the negative electrode SEI filmis denoted by I, the component amount of the fluorosulfonic acid skeleton in the negative electrode SEI filmis denoted by I, and the component amount of the phosphoric acid skeleton in the positive electrode SEI filmis denoted by I, a formula of 4≤I/I≤10 and a formula of 5 μmol/m≤I≤15 μmol/mare satisfied.