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:
Apr. 29, 2014
Filed:
Nov. 24, 2005
Shigeto Okada, Fukuoka, JP;
Jun-ichi Yamaki, Kasuga, JP;
Yusuke Takahashi, Dazaifu, JP;
Kenji Nakane, Tsukuba, JP;
Shigeto Okada, Fukuoka, JP;
Jun-ichi Yamaki, Kasuga, JP;
Yusuke Takahashi, Dazaifu, JP;
Kenji Nakane, Tsukuba, JP;
Sumitomo Chemical Company, Limited, Tokyo, JP;
Kyushu University, National University Corporation, Fukuoka, JP;
Abstract
Disclosed is a positive electrode active material for nonaqueous electrolyte secondary batteries which contains a complex oxide mainly containing sodium, nickel and a tetravalent metal while having a hexagonal structure. This positive electrode active material enables to obtain a nonaqueous electrolyte secondary battery with high operating voltage. The complex oxide is preferably expressed as Na[NaNiMA]O(wherein M represents one or more tetravalent metals, A represents one or more trivalent metals, 0<x≦0.5, 0≦y<1/6, and x>y).