Electricity: electrical systems and devices – Electrolytic systems or devices – Double layer electrolytic capacitor
Patent
1992-03-03
1992-12-15
Griffin, Donald
Electricity: electrical systems and devices
Electrolytic systems or devices
Double layer electrolytic capacitor
29 2503, 4234471, H01G 900, C09C 156
Patent
active
051723077
ABSTRACT:
An activated carbon/polyacene composite is disclosed. The composite contains activated carbon powder or fiber and having a selected molar ratio range of hydrogen atoms [H] to carbon atoms [C] of 0.01.ltoreq.[H]/[C].ltoreq.0.2. It provides two or more times the capacitance per unit volume, and enables reduction of the equivalent series resistance of an electric double-layer capacitor without compression. It therefore is a suitable composite for use as polarizable electrodes for electric double-layer capacitors. The composite can be made by mixing activated carbon powder or fiber and a thermosetting resin powder such as phenolin resin powder, and subjecting the mixture to heat treatment in a nonoxidizing atmosphere at temperatures between 600.degree. and 1000.degree. C. which is insufficient to reach full carbonization of the thermosetting resin.
REFERENCES:
patent: 4542444 (1985-09-01), Boland
patent: 4626964 (1986-12-01), Azuma et al.
patent: 4737889 (1988-04-01), Nishino et al.
patent: 4921686 (1990-05-01), Yoshida et al.
Ochi Atsushi
Saito Takashi
Shimizu Yukari
Tabuchi Junji
Griffin Donald
NEC Corporation
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