Electrochemical device and nonaqueous electrolyte solution for electrochemical device
US9455468B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2012 |
| Grant date | Sep 27, 2016 |
| Priority date | — |
| Expiry date | May 29, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/13
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.