Current Density of Electrolytic Aluminum Flats

Not without knowing the current and what an 'electrolytic aluminum flat' is. More info please.

Need dimensions and total current.

Go to http://www.cde.com/ website and you will find flat electrolytic capacitors. You will have to use the energy density equation for a capacitor and calculate it your self.

Or you could wait for the technology from the company I work for www.1-LTL.com. We expect to have solid state replacements with up to 50J/cc energy density or 20 times that of current electrolytic for use in power supply front ends. You have to wait about 3.5 years though before they are commercial.

Cheers... Dave