graphite paper - alufoil cell puts out 1.45 Volts 2 mA !

[hartiberlin]

I am in Italy right now.
Well, one could use a stack of 10x10 cm gaphite paper (lampblack) plate stacked
onto 10x10 cm alufoil next a 10x10 cm paper towel with K2CO3-water solution
and then again gaphite (lampblack) plate, etc..

If you stack about 34 of these cells over each other and build a series "tower"
cell like this you would get a voltage of 50 volts, so you could power about
24 to 25 white LEDs pretty nicely for quite long time.

Regards, Stefan.

[yaz]

Two interesting links. Easy homemade devices...

Charcoal Battery
  http://uk.geocities.com/nsc_zambia/experiments2004/em01_charcoal_battery.htm

Hydrogen-Oxygen Fuel Cell
   http://uk.geocities.com/nsc_zambia/experiments2004/ec02_fuel_cell.htm

[mikewatson]

Stefan

for the conducting layer why not use colloidal graphite, it is called Aquadag. Just paint it on and let it dry. It is a very good conductor.
You can get it here:-

http://www.technologysupplies.co.uk/acatalog/Main_Menu_Aquadag_Paint_342144.html

Mike

[froarty]

Mike, Stefan,   I realize your "graphite paper" is not the same graphite paper mentioned in today's news release http://www.newspostonline.com/sci-tech/scientists-find-novel-method-for-large-scale-production-of-nanomaterial-graphene-2008111113423 but it might still produce a certain fraction of graphene when soaked in hydrazine.

But now, scientists led by Yang Yang, a professor of materials science and engineering at the UCLA Henry Samueli School of engineering, scientists have developed a method in which graphite oxide paper is placed in a solution of pure hydrazine, which then turns graphite oxide paper into single-layer graphene.

[hartiberlin]

Stefan

for the conducting layer why not use colloidal graphite, it is called Aquadag. Just paint it on and let it dry. It is a very good conductor.
You can get it here:-

http://www.technologysupplies.co.uk/acatalog/Main_Menu_Aquadag_Paint_342144.html

Mike

Too expensive !
You can also produce colloidal graphite, when using the colloidal silver method by using
heated destilled water and use 2 graphite electrodes which are pulsed by about 30 Volts.
Then there will be nanosized graphite particles going into the water aftter an hour or more the water
will be black with all the particles...

The problem was, that you need a NON Water soluable electrode, so I just used
an acrylic binder with the graphite.
I will soon do the pics and videos when I am done with some other work,
that is more urgent right now for me.

Regards, Stefan.