Electrolyte solution and electrochemical device
US-9601279-B2 · Mar 21, 2017 · US
Nonaqueous electrolytic solution for electric double layer capacitors
US2017330700A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2017330700-A1 |
| Application number | US-201415534234-A |
| Country | US |
| Kind code | A1 |
| Filing date | Dec 11, 2014 |
| Priority date | Dec 11, 2014 |
| Publication date | Nov 16, 2017 |
| Grant date | — |
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Abstract
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The present invention provides a nonaqueous electrolytic solution that provides an electric double layer capacitor having excellent durability. The nonaqueous electrolytic solution of the present invention is a nonaqueous electrolytic solution for electric double layer capacitors prepared by dissolving a quaternary ammonium salt as an electrolyte in a nonaqueous solvent, and the nonaqueous electrolytic solution has an alkali metal cation concentration of 0.1 to 30 ppm.
First claim
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1 . A nonaqueous electrolytic solution for electric double layer capacitors prepared by dissolving a quaternary ammonium salt represented by the general formula (I): Q + X − (I) (wherein Q + represents a quaternary ammonium cation, X − represents a counter ion selected from the group consisting of PF 6 − , BF 4 − , AsF 6 − , N(CF 3 SO 3 ) 2 − , SbF 6 − , and RfSO 3 − (Rf is a fluoroalkyl group having 1 to 8 carbon atoms)) as an electrolyte in a nonaqueous solvent, the quaternary ammonium salt excluding spiro quaternary ammonium tetrafluoroborate, the nonaqueous electrolytic solution having an alkali metal cation concentration of 0.1 to 30 ppm. 2 . The nonaqueous electrolytic solution according to claim 1 , wherein the alkali metal cation concentration is more than 10 ppm and not more than 30 ppm. 3 . The nonaqueous electrolytic solution according to claim 1 , wherein the alkali metal cation concentration is 12 to 30 ppm. 4 . The nonaqueous electrolytic solution according to claim 1 , wherein the alkali metal cation is a sodium ion and/or a potassium ion. 5 . The nonaqueous electrolytic solution according to claim 1 , wherein the quaternary ammonium cation is tetraalkyl ammonium or pyrrolidinium. 6 . The nonaqueous electrolytic solution according to claim 1 , wherein the quaternary ammonium cation is N-ethyl-N-methyl pyrrolidinium. 7 . The nonaqueous electrolytic solution according to claim 1 , wherein the quaternary ammonium cation is N,N,N-triethyl-N-methyl ammonium. 8 . The nonaqueous electrolytic solution according to claim 1 , wherein the X − in the general formula (I) is BF 4 − . 9 . The nonaqueous electrolytic solution according to claim 1 , wherein the nonaqueous solvent is at least one solvent selected from the group consisting of propylene carbonate, ethylene carbonate, butylene carbonate, sulfolane, methylsulfolane, dimethyl carbonate, ethyl methyl carbonate, and diethyl carbonate. 10 . An electric double layer capacitor comprising the nonaqueous electrolytic solution according to claim 1 as an electrolytic solution.
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Classifications
Quaternary ammonium compounds · CPC title
Halides (C01G28/001 takes precedence) · CPC title
Carbonates of sodium, potassium or alkali metals in general · CPC title
- H01G11/60Primary
characterised by the solvent · CPC title
- H01G11/62Primary
characterised by the solute, e.g. salts, anions or cations therein · CPC title
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- What does patent US2017330700A1 cover?
- The present invention provides a nonaqueous electrolytic solution that provides an electric double layer capacitor having excellent durability. The nonaqueous electrolytic solution of the present invention is a nonaqueous electrolytic solution for electric double layer capacitors prepared by dissolving a quaternary ammonium salt as an electrolyte in a nonaqueous solvent, and the nonaqueous elec…
- Who is the assignee on this patent?
- Otsuka Chemical Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01G11/60. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Nov 16 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).