Nonaqueous electrolyte for electrical storage devices
Abstract
Improved nonaqueous electrolytes for application in electrical storage devices such as electrochemical capacitors or batteries are disclosed. The electrolytes of the invention contain salts consisting of alkyl substituted, cyclic delocalized aromatic cations, and their perfluoro derivatives, and certain polyatomic anions having a van der Waals volume less than or equal to 100 .ANG..sup.3, preferably inorganic perfluoride anions and most preferably PF.sub.6.sup.-, the salts being dissolved in organic liquids, and preferably alkyl carbonate solvents, or liquid sulfur dioxide or combinations thereof, at a concentration of greater than 0.5M and preferably greater than 1.0M. Exemplary electrolytes comprise 1-ethyl-3-methylimidazolium hexafluorophosphate dissolved in a cyclic or acylic alkyl carbonate, or methyl formate, or a combination therof. These improved electrolytes have useful characteristics such as higher conductivity, higher concentration, higher energy storage capabilities, and higher power characteristics compared to prior art electrolytes. Stacked capacitor cells using electrolytes of the invention permit high energy, high voltage storage.
- Inventors:
-
- Melrose, MA
- Waltham, MA
- Issue Date:
- Research Org.:
- Covalent Associates, Inc
- OSTI Identifier:
- 872574
- Patent Number(s):
- 5965054
- Assignee:
- Covalent Associates, Inc. (Woburn, MA)
- Patent Classifications (CPCs):
-
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01G - CAPACITORS
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- DOE Contract Number:
- FG02-96ER82149
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- nonaqueous; electrolyte; electrical; storage; devices; improved; electrolytes; application; electrochemical; capacitors; batteries; disclosed; contain; salts; consisting; alkyl; substituted; cyclic; delocalized; aromatic; cations; perfluoro; derivatives; polyatomic; anions; van; waals; volume; equal; 100; ang; preferably; inorganic; perfluoride; pf; dissolved; organic; liquids; carbonate; solvents; liquid; sulfur; dioxide; combinations; concentration; 5m; 0m; exemplary; comprise; 1-ethyl-3-methylimidazolium; hexafluorophosphate; acylic; methyl; formate; combination; therof; useful; characteristics; conductivity; energy; capabilities; power; compared; prior; stacked; capacitor; cells; permit; voltage; methyl formate; aqueous electrolyte; organic liquids; alkyl substituted; storage device; energy storage; sulfur dioxide; organic liquid; storage devices; electrochemical capacitors; electrical storage; nonaqueous electrolyte; electrochemical capacitor; improved electrolyte; /252/429/999/
Citation Formats
McEwen, Alan B, and Yair, Ein-Eli. Nonaqueous electrolyte for electrical storage devices. United States: N. p., 1999.
Web.
McEwen, Alan B, & Yair, Ein-Eli. Nonaqueous electrolyte for electrical storage devices. United States.
McEwen, Alan B, and Yair, Ein-Eli. Fri .
"Nonaqueous electrolyte for electrical storage devices". United States. https://www.osti.gov/servlets/purl/872574.
@article{osti_872574,
title = {Nonaqueous electrolyte for electrical storage devices},
author = {McEwen, Alan B and Yair, Ein-Eli},
abstractNote = {Improved nonaqueous electrolytes for application in electrical storage devices such as electrochemical capacitors or batteries are disclosed. The electrolytes of the invention contain salts consisting of alkyl substituted, cyclic delocalized aromatic cations, and their perfluoro derivatives, and certain polyatomic anions having a van der Waals volume less than or equal to 100 .ANG..sup.3, preferably inorganic perfluoride anions and most preferably PF.sub.6.sup.-, the salts being dissolved in organic liquids, and preferably alkyl carbonate solvents, or liquid sulfur dioxide or combinations thereof, at a concentration of greater than 0.5M and preferably greater than 1.0M. Exemplary electrolytes comprise 1-ethyl-3-methylimidazolium hexafluorophosphate dissolved in a cyclic or acylic alkyl carbonate, or methyl formate, or a combination therof. These improved electrolytes have useful characteristics such as higher conductivity, higher concentration, higher energy storage capabilities, and higher power characteristics compared to prior art electrolytes. Stacked capacitor cells using electrolytes of the invention permit high energy, high voltage storage.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {1}
}
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