Double layer capacitor with high capacitance carbonaceous materi

Details Double layer capacitor with high capacitance carbonaceous materi Double layer capacitor with high capacitance carbonaceous materi

1994-03-31

1995-07-04

Reynolds, Bruce A.

Electricity: electrical systems and devices

Electrolytic systems or devices

Double layer electrolytic capacitor

423460, 252502, H01G 900

Patent

active

054306060

ABSTRACT:
A double layer capacitor with electrodes produced from a carbonaceous material having a large capacitance obtained by heat-treating an activated carbon precursor at a temperature below 700.degree. C., preferably from 400.degree. to 500.degree. C., in an alkali metal hydroxide bath. In particular, its capacitance per unit volume is several times larger, in some cases 7 or more times larger, as compared with conventional activated carbons for capacitors.

REFERENCES:
patent: 3536963 (1970-10-01), Boos
patent: 4458022 (1984-07-01), Ohsaki et al.
patent: 4946663 (1990-08-01), Audley et al.
patent: 4987116 (1991-01-01), Karl et al.
patent: 5064805 (1991-11-01), Otowa

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