Generating a Couple of Watts Using Urine?
I recently came across a paper written by a researcher from a Scottish University about generating electricity directly from urine in a fuel cell and I was wondering if a larger version could be built to generate around 2 watts. The power per square cm is around 1.5mW so even at 1mW I would need 2000 cm-sq so I think it would be easier to build a stack of cells instead of one or 2 large cells.
I'd like to attach the paper but it's one which you need to pay for though I got it for free, could a moderator let me know what to do? It was written by a Shanwen Tao and called 'A Direct Urea Fuel Cell' DOI: 10.1039/b924786f
Another idea I had was to use a small PV setup to generate hydrogen from urine and then store the gas so that it can be used in a hydrogen fuel cell. I've had some difficulty in trying a to find a cheap fuel cell but then I came across this page: http://www.mtmscientific.com/fuelcell.html
Are there any really simple ways of building a fuel cell?
I'm posting this here to see if anyone can help me come up with a viable design and maybe even build it for me. I can pay you for your time and effort; though as a student I do have a tight budget to stick to.
Any help, advice and ideas will be very much appreciated.