Electrolytic solution for electric double layer capacitor and electric double layer capacitor
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United States of America Patent
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Feb 2, 2010
Grant Date -
Aug 23, 2007
app pub date -
Jul 27, 2004
filing date -
Mar 12, 2004
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Abstract
An electrolytic solution for an electric double layer capacitor comprising a quaternary ammonium salt in a mixed solvent containing ethylene carbonate and propylene carbonate as an electrolyte. The electrolytic solution for electric double layer capacitor has a low coefficient of viscosity, has an excellent low temperature characteristics of not coagulating at a low temperature, possesses high electrical conductivity over a wide temperature range, and has a long-term reliability.
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