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. 29, 2015
Filed:
Jun. 16, 2010
Mariko Kohmoto, Kyoto, JP;
Toru Tabuchi, Kyoto, JP;
Tokuo Inamasu, Kyoto, JP;
Toshiyuki Nukuda, Kyoto, JP;
Mariko Kohmoto, Kyoto, JP;
Toru Tabuchi, Kyoto, JP;
Tokuo Inamasu, Kyoto, JP;
Toshiyuki Nukuda, Kyoto, JP;
GS YUASA INTERNATIONAL LTD., Kyoto, JP;
Abstract
The positive active material is a positive active material for a lithium secondary battery, including a lithium transition metal compound that has an olivine crystal structure and contains at least Ni, Fe, and Mn as transition metal elements, wherein when the sum of mole atoms of Ni, Fe, and Mn of transition metal elements contained in the lithium transition metal compound is expressed as 1, and the mole atomic ratios of Ni, Fe, and Mn are represented by a, b, and c (a+b+c=1, a>0, b>0, c>0), respectively, the following is satisfied: 0.85≦c≦0.92 and 0.3≦a/(a+b)≦0.9.