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:
Mar. 15, 2016
Filed:
Aug. 22, 2011
Maiko Saka, Tsukuba, JP;
Cedric Pitteloud, Saintlouis, FR;
Tetsuri Nakayama, Tsukuba, JP;
Kenji Takamori, Tsukuba, JP;
Maiko Saka, Tsukuba, JP;
Cedric Pitteloud, Saintlouis, FR;
Tetsuri Nakayama, Tsukuba, JP;
Kenji Takamori, Tsukuba, JP;
SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo, JP;
Abstract
The present invention provides a positive electrode active material. The positive electrode active material is represented by the following formula (I) and has a BET specific surface area of larger than 5 m/g and not larger than 15 m/g:LiMMO  (I)wherein Mis at least one transition metal element selected from Group 5 elements and Group 6 elements of the Periodic Table, Mis at least one transition metal element other than Mand selected from among transition metal elements excluding Fe, x is not less than 0.9 and not more than 1.3, and y is more than 0 and less than 1.