Electricity: electrical systems and devices – Electrolytic systems or devices – Double layer electrolytic capacitor
Reexamination Certificate
2007-10-16
2007-10-16
Ha, Nguyen T. (Department: 2831)
Electricity: electrical systems and devices
Electrolytic systems or devices
Double layer electrolytic capacitor
C361S504000, C361S508000, C361S512000, C361S516000, C361S519000, C252S062200
Reexamination Certificate
active
11525973
ABSTRACT:
An electric double layer capacitor has a pair of current collectors, a positive polarizable electrode which is provided on one of the pair of current collectors, includes activated carbon of a weight W+and has a capacitance C+, a negative polarizable electrode which is provided on the other of the pair of current collectors, includes activated carbon of a weight W−and has a capacitance C−, a separator interposed between the positive and negative polarizable electrodes, and an organic electrolytic solution which impregnates at least the positive and negative polarizable electrodes and the separator, wherein C−/C+=0.6 to 1.0 and W−/W+=1.1 to 2.0. Even when continuously charged at a high applied voltage, the electric double layer capacitor has a high retention of capacitance and a low rise in internal resistance, and thus has an excellent durability.
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Search Report dated Jan. 25, 2007, issued in corresponding European Application No. 06254841.7.
Nakata Hidenori
Yoshida Hiroshi
Ha Nguyen T.
Nisshinbo Industries Inc.
Westerman, Hattori, Daniels & Adrian , LLP.
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