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. 08, 2016
Filed:
Jul. 25, 2011
Makiko Uehara, Kanagawa, JP;
Takehiro Noguchi, Kanagawa, JP;
Makiko Uehara, Kanagawa, JP;
Takehiro Noguchi, Kanagawa, JP;
NEC ENERGY DEVICES, LTD., Kanagawa, JP;
Abstract
Provided is a lithium ion positive electrode active material for a secondary battery that can realize a high operating voltage and a high capacity while suppressing capacity drop with cycles by using a low-cost material. A positive electrode active material for a secondary battery, which is a lithium manganese composite oxide represented by the following general formula (I)Li(MMnY)(OZ)  (I)wherein in the formula (I), 0.5≦x≦1.2, 0<y≦0.3, 0≦a≦1.2, and 0<w≦1; M contains at least Fe and may further contain at least one selected from the group consisting of Ni, Cr and Cu other than Fe; Y is at least one selected from the group consisting of Li, Be, B, Na, Mg, Al, K, Ca, Ti and Si; and Z is at least one of F and Cl.