Electrolytic solution for electric double layer capacitor...

Details Electrolytic solution for electric double layer capacitor... Electrolytic solution for electric double layer capacitor...

2004-07-27

2008-08-12

Thomas, Eric (Department: 2831)

Electricity: electrical systems and devices

Electrolytic systems or devices

Double layer electrolytic capacitor

C361S503000, C252S062200

Reexamination Certificate

active

07411777

ABSTRACT:
An electrolytic solution for an electric double layer capacitor is provided. A spiro compound of formula (1) is provided as an electrolyte in an aprotic solvent. The electric conductivity of the solution at −40° C. is 0.85 mS/cm or higher.This electrolytic solution provides a high dissolution of electrolyte in solvent and exhibits excellent conductivity and electrostatic capacity over a wide range of temperatures Further, the electrolytic solution exhibits high resistance to voltage, even under long-term high voltage load, and exhibits suppressed lowering of electrostatic capacity allowing the solution to excel in long-term stability.

REFERENCES:
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Makoto UE, et al., “Electrochemical Properties of Organic Liquid Electrolytes Based on Quaternary Onium Salts for Electrical Double-Layer Capacitors”, J. Electrochem. Soc., vol. 141, No. 11, Nov. 1994, pp. 2989-2996.

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