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:
Sep. 27, 2016
Filed:
Mar. 30, 2012
Hideo Sakata, Settsu, JP;
Meiten Koh, Settsu, JP;
Akiyoshi Yamauchi, Decatur, AL (US);
Hitomi Nakazawa, Settsu, JP;
Tomoyo Sanagi, Moriguchi, JP;
Aoi Nakazono, Settsu, JP;
Yuki Adachi, Settsu, JP;
Kyouhei Sawaki, Settsu, JP;
Akinori Tani, Settsu, JP;
Masahiro Tomita, Settsu, JP;
Mayuko Taeda, Settsu, JP;
Hideo Sakata, Settsu, JP;
Meiten Koh, Settsu, JP;
Akiyoshi Yamauchi, Decatur, AL (US);
Hitomi Nakazawa, Settsu, JP;
Tomoyo Sanagi, Moriguchi, JP;
Aoi Nakazono, Settsu, JP;
Yuki Adachi, Settsu, JP;
Kyouhei Sawaki, Settsu, JP;
Akinori Tani, Settsu, JP;
Masahiro Tomita, Settsu, JP;
Mayuko Taeda, Settsu, JP;
DAIKIN INDUSTRIES, LTD., Osaka, JP;
Abstract
The present invention aims to provide an electrochemical device excellent in high temperature storage characteristics and cycling characteristics at high voltages, and a nonaqueous electrolyte for the electrochemical device. The present invention relates to an electrochemical device including: a positive electrode; a negative electrode; and a nonaqueous electrolyte containing a nonaqueous solvent and an electrolyte salt, wherein the nonaqueous solvent contains a fluorinated linear carbonate represented by the formula (1):RfOCOOR  (1)(wherein Rf represents a C1-4 fluorinated alkyl group and R represents a C1-4 alkyl group), and further contains following compounds of (I) to (III) in a total amount of not more than 5000 ppm relative to the fluorinated linear carbonate: (I) a compound represented by the formula (2)RfOH  (2)(wherein Rf is defined as above); (II) a compound represented by the formula (3)ROH  (3)(wherein R is defined as above); and (III) a compound represented by the formula (4)ROCOCl  (4)(wherein R is defined as above).