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. 15, 2015
Filed:
Dec. 16, 2013
Kabushiki Kaisha Toshiba, Minato-ku, JP;
Shinsuke Matsuno, Tokyo, JP;
Dai Yamamoto, Kanagawa, JP;
Hideki Satake, Nagano, JP;
Norio Takami, Kanagawa, JP;
Kabushiki Kaisha Toshiba, Minato-ku, JP;
Abstract
A non-aqueous electrolyte secondary battery includes a positive electrode containing active material particles composed of a core section formed of olivine type LiFePO; an intermediate section that lies on the outer side of the core section and has LiFePO; and a surface section that lies on the outer side of the intermediate section and has LiFePO; and a negative electrode containing lithium titanate, in which battery the molar concentration ratio of Fe relative to P at the core section is greater than the average of x/y of LiFePO, the average value of a/b of LiFePOat the surface section of the positive electrode active material particles is smaller than the average of x/y of LiFePO, and the positive electrode active material particles include a region in which x/y of LiFePOat the intermediate section increases continuously or intermittently in the direction from the surface section toward the core section.