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. 08, 2014
Filed:
Oct. 25, 2007
Applicants:
Hideo Sakata, Ibaraki, JP;
Fusaji Kita, Ibaraki, JP;
Kumiko Ishizuka, Ibaraki, JP;
Inventors:
Assignee:
Hitachi Maxell, Ltd., Ibaraki-shi, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 4/50 (2010.01); H01M 4/52 (2010.01); H01M 4/525 (2010.01); H01M 6/16 (2006.01);
U.S. Cl.
CPC ...
Abstract
A nonaqueous secondary battery having a positive electrode having a positive electrode mixture layer, a negative electrode, and a nonaqueous electrolyte, in which the positive electrode contains, as an active material, a lithium-containing transition metal oxide containing a metal element selected from the group consisting of Mg, Ti, Zr, Ge, Nb, Al and Sn, the positive electrode mixture layer has a density of 3.5 g/cmor larger, and the nonaqueous electrolyte contains a compound having two or more nitrile groups in the molecule.