does anyone know if it is possible to use urine for the electrolyte in a fuel cell?

fuel cell:
http://www.digitalsplashstudios.com/fuel-cell.html


urine battery:
http://news.nationalgeographic.com/news/2005/08/0818_050818_urinebattery.html

I have seen it all lol.

Found this reference on a search of the chemical composition of urine:

"Urine contains 95% water and 5% solids.  More than 1000 different
mineral salts and compounds are estimated to be in urine.  So far, our
scientific community knows of about 200 elements.  Some substances are: 
vitamins, amino acids, antibodies, enzymes, hormones, antigens, interleukins,
proteins, immunoglobulins, gastric secretory depressants, tolergens,
immunogens, uric acid, urea, proteoses, directin, H-11 (a growth inhibitory
factor in human cancer), and urokinase.  Believe it or not, scientists have
know for years that urine is antibacterial, anti-protozoal, anti-fungal, anti-
viral, and anti-tuberculostatic! "

So what is required for a good electrolyte material in a fuel cell? I have no idea; but if you can find a cheap material to go inside of a type of fuel cell, then you will have solved the biggest barrier to using a fuel cell: COST!!

Plus you get the added benefit of a really good payback for people who like to "siphon" your gas tank for you...