Patent ID: 7268995
Filing Date: 2007-09-11
Classification: H01G,Y02E

Abstract:
1. An electric double layer capacitor having a rated capacitance (farads), comprising: a pair of current collectors, a positive polarizable electrode provided on one of the pair of current collectors, a negative polarizable electrode provided on the other of the pair of current collectors, 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; which capacitor has a theoretical amount of ions Q wherein C is the rated capacitance (farads) of the capacitor and V is the rated voltage (volts) representing the maximum voltage allowed across the capacitor, and an amount of ions Q e in the organic electrolytic solution which impregnates the positive and negative polarizable electrodes and the separator, such that the ratio Q e /Q t is from 1.7 to 3.5.