Turns out only 3!

Water Based AC/AC Supercapacitors Reaching the Performance of Systems in Organic Electrolyte

http://ma.ecsdl.org/content/MA2014-02/3/211.abstract

I will be combining this method with my nitrogen plasma functionalized AC and hopefully get 500 farads per gram at 1.6 volts! Or use oxidized AC and get 1.9 volts potential.

Very excited!