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:
May. 04, 2010
Filed:
May. 28, 2004
Kazuya Ogawa, Tokyo, JP;
Atsushi Sano, Tokyo, JP;
Tsuyoshi Iijima, Tokyo, JP;
Satoshi Maruyama, Tokyo, JP;
Kazuya Ogawa, Tokyo, JP;
Atsushi Sano, Tokyo, JP;
Tsuyoshi Iijima, Tokyo, JP;
Satoshi Maruyama, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A nonaqueous solvent in a nonaqueous electrolytic solution in a lithium-ion secondary batterycontains propylene carbonate (PC), a first compound expressed by formula (I), and a second compound expressed by formula (II). The content of PC in the nonaqueous solvent is at least 10 volume %. The content X [mass %] of the first compound and the content Y [mass %] of the second compound simultaneously satisfy the conditions represented by expressions (1) and (2) [2≦(X+Y)≦8 (1), 0.01≦(Y/X)≦0.30 (2)]. Rto Rin formula (I) indicate any of a hydrogen atom and hydrocarbon groups having a carbon number of 1 to 3, whereas Rand Rin formula (II) indicate any of a hydrogen atom and hydrocarbon groups having a carbon number of 1 to 3.