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Electrochemical device and nonaqueous electrolyte solution for electrochemical device
US9455468B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9455468-B2 |
| Application number | US-201214008356-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 30, 2012 |
| Priority date | Mar 31, 2011 |
| Publication date | Sep 27, 2016 |
| Grant date | Sep 27, 2016 |
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Abstract
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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).
First claim
Opening claim text (preview).
The invention claimed is: 1. An electrochemical device comprising: 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 2500 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). 2. The electrochemical device according to claim 1 , wherein the fluorinated linear carbonate is CF 3 CH 2 OCOOCH 3 or CF 3 CH 2 OCOOCH 2 CH 3 . 3. The electrochemical device according to claim 1 , wherein the amount of the fluorinated linear carbonate represented by the formula (1) is 0.01 to 90% by mass in the nonaqueous solvent. 4. The electrochemical device according to claim 1 , wherein the electrochemical device is a lithium ion secondary battery. 5. A nonaqueous electrolyte for an electrochemical device, comprising: 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 2500 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).
Assignees
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Classifications
- H01M10/0525Primary
Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title
Cross-Sectional Technologies · mapped topic
characterised by the solvents · CPC title
Energy storage using capacitors · CPC title
Li-accumulators · CPC title
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Frequently asked questions
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- What does patent US9455468B2 cover?
- 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 solve…
- Who is the assignee on this patent?
- Sakata Hideo, Koh Meiten, Yamauchi Akiyoshi, and 9 more
- What technology area does this patent fall under?
- Primary CPC classification H01M10/0525. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Sep 27 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).