Activated carbon for use in electric double layer capacitors

Details Activated carbon for use in electric double layer capacitors Activated carbon for use in electric double layer capacitors

2006-06-21

2009-12-01

Hendrickson, Stuart (Department: 1793)

Catalyst, solid sorbent, or support therefor: product or process

Solid sorbent

Free carbon containing

C502S437000

Reexamination Certificate

active

07625839

ABSTRACT:
Activated carbon adapted for electric double layer capacitors is provided, which capacitors can give a large power density per unit volume and which capacitors, even when charge-and-discharge cycle is repeated under a large current or a constant voltage is continuously applied for a long time, undergo less decrease in output density. In particular, the present invention relates to the activated carbon manufactured by carbonization of coconut shell, which has a BET specific surface area of 2000 m2/g to 2500 m2/g, an average pore diameter of 1.95 nm (19.5 Å) to 2.20 nm (22 Å) and a pore volume of pores having a pore diameter calculated according to a Cranston-Inkley method of 5.0 nm (50 Å) to 30.0 nm (300 Å), of 0.05 cm3/g to 0.15 cm3/g.

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