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:
Jun. 30, 2015
Filed:
Sep. 17, 2010
Meiten Koh, Settsu, JP;
Akiyoshi Yamauchi, Settsu, JP;
Akinori Tani, Settsu, JP;
Hideo Sakata, Settsu, JP;
Hitomi Nakazawa, Settsu, JP;
Toshiki Ichisaka, Settsu, JP;
Hiroyuki Arima, Settsu, JP;
Tomoyo Sanagi, Settsu, JP;
Meiten Koh, Settsu, JP;
Akiyoshi Yamauchi, Settsu, JP;
Akinori Tani, Settsu, JP;
Hideo Sakata, Settsu, JP;
Hitomi Nakazawa, Settsu, JP;
Toshiki Ichisaka, Settsu, JP;
Hiroyuki Arima, Settsu, JP;
Tomoyo Sanagi, Settsu, JP;
DAIKIN INDUSTRIES, LTD., Osaka, JP;
Abstract
The present invention provides a solvent for a nonaqueous electrolyte solution enabling a lithium secondary battery to exhibit an excellent discharge capacity, load characteristics, and cycle characteristics even under high voltages, as well as a nonaqueous electrolyte solution that uses this solvent and a lithium secondary battery. This solvent for a nonaqueous electrolyte solution is a solvent for a nonaqueous electrolyte solution for a lithium secondary battery, wherein the solvent for a nonaqueous electrolyte solution contains a fluorine-free cyclic carbonate (I), a fluorine-free chain carbonate (II), and a 1,1-di(fluorinated alkyl)ethylene carbonate (III), and wherein with a sum of (I), (II), and (III) being 100 volume %, the fluorine-free cyclic carbonate (I) is 10 to 50 volume %, the fluorine-free chain carbonate (II) is 49.9 to 89.9 volume %, and the 1,1-di(fluorinated alkyl)ethylene carbonate (III) is from at least 0.1 volume % to not more than 30 volume %.