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. 08, 2015
Filed:
Sep. 14, 2010
Tomitaro Hara, Okazaki, JP;
Akira Tsujiko, Aichi-ken, JP;
Sachie Yuasa, Okazaki, JP;
Takahito Imamine, Nisshin, JP;
Tsuyoshi Sasaki, Aichi-ken, JP;
Yuichi Itou, Toyota, JP;
Youji Takeuchi, Seto, JP;
Osamu Hiruta, Nagoya, JP;
Chikaaki Okuda, Nagoya, JP;
Mamoru Mizutani, Owariasahi, JP;
Hiroshi Sawada, Seto, JP;
Tomitaro Hara, Okazaki, JP;
Akira Tsujiko, Aichi-ken, JP;
Sachie Yuasa, Okazaki, JP;
Takahito Imamine, Nisshin, JP;
Tsuyoshi Sasaki, Aichi-ken, JP;
Yuichi Itou, Toyota, JP;
Youji Takeuchi, Seto, JP;
Osamu Hiruta, Nagoya, JP;
Chikaaki Okuda, Nagoya, JP;
Mamoru Mizutani, Owariasahi, JP;
Hiroshi Sawada, Seto, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi, JP;
Kabushiki Kaisha Toyota Chuo Kenkyusho, Nagakute, Aichi, JP;
Abstract
A lithium-ion secondary battery with excellent durability is provided using a two-phase coexisting compound as a positive electrode active material. This lithium-ion secondary battery is provided with an electrode body having a positive electrode containing a positive electrode active material and a negative electrode containing a negative electrode active material, and a non-aqueous electrolyte solution containing a lithium salt in an organic solvent. The positive electrode active material is mainly composed of a two-phase coexisting compound containing lithium, and also contains particles of a lithium-transition metal oxide with a layered structure. The particles of the layered oxide have an average particle diameter of 2 μm or less, and the percentage content thereof in the positive electrode active material is 5 mass % or less.