caps with porous plates ?

From:  Boombast99 [SMTP:Boombast99-at-aol-dot-com]
Sent:  Friday, April 17, 1998 6:47 PM
To:  tesla-at-pupman-dot-com
Subject:  Re: caps and pvc?

Great explaination of what causes one material to have a dielectric constant
of 2.3 (like PE ) and another to have a value of 6,000 (like barium titanate).
I have heard that some "super capacitors" have porous metallic plates to
increase the surface area and thus the capacitance............any ideas on
this Bert ?