POLYACENE CAPACITORS

We fabricated two types of polyacene capacitor with extremely stable p olyacenic semiconductor (PAS) as the positive and negative electrodes. The first one is a coin-type PAS capacitor (six different sizes), whi ch possesses large capacity with high reliability. Its capacity is muc h larger than that of the conventional electric double-layer capacitor which uses activated carbon as electrode. PAS capacitor can maintain more than 70% of the initial capacity even after 100 000 cycles. Moreo ver, this capacitor can be charged and discharged in a few minutes as well as at low rate. The second one is a cylinder-type PAS capacitor ( diameter: 18 mm, height: 65 mm) which shows high capacity of 100 F and can discharge at the extremely high rate of 80 C. The coin-type PAS c apacitor is currently used for memory back-up of electrical and commun ication equipment, and the cylinder-type is considered to be useful as power back-up for starting drive parts of electric equipment which ne eds high power density.