Graphite-Paper - Aluminium-Foil galvanic cell with 1.7 to 1.92 Volts

[stephenafreter]

Hi,
I just discovered this thread ! It's here that I should post about alu-graphite batteries !
Thanks Stephan, and congratulations for your discovery of this powerful combination !

[stephenafreter]

Mk1 posted a very interesting document on graphite-alu battery on the "Working Air Battery"
http://www.overunity.com/index.php?action=downloads;sa=view;down=396

It's using graphite pencils and added graphite powder for a very high output.
It has a comparative and careful study of several electrolyte mixes !
Results are impressive, but I don't know what they use as binding material for the powder ?!
I tried several products, but they lower the conductivity of the electrode.
Graphite pencils have a resistance around 10 to 20 Ohms, while the binded powder is at 20 k Ohms !
Any suggestion about the glue they use in this document ?

[stephenafreter]

I am very enthusiastic about this design. It could use alu cans or alu foil.
The power output being good and the alu cheap, that would be an important alternative for lighting shack in poor area !
To stop the process during the day, we can have the electrolyte removed, like this for example:

[Pirate88179]

Why not use the best galvanic difference we can get easily?  I mean graphite and magnesium? I know Stefan was using Al foil as it is cheap and very easy to get and replace but, if one really wants to do this why not use the above mentioned materials?

Note:  These are the same materials I have been using on my earth battery, or EER, for the past 2 years.

Jeanna has been doing some great work using an electrolyte that keeps the degradation of the magnesium to a minimum.

Anyway, this is a great area of study and I enjoy seeing what folks are working with and their results.

Bill

[stephenafreter]

@Pirate
Thanks for your comments.
My problem is to find magnesium in shack areas, because this ribbon is really not available everywhere.
Of course for use as safety battery, then we can stock some magnesium ribbon.

Advantage of aluminum is that it's everywhere in this world, being old cola can or cooking foil.
It's the same cost for 75 feet of magnesium ribbon than 25 meter square of aluminum foil.
But the main thing is that aluminum is available everywhere, so people can build this battery model by themselves, or at least recharge them by their own, just coiling a piece of foil or a can.

I saw on the excellent chart you linked http://www.thelenchannel.com/1galv.php that there was not much difference between alu and magnesium, 0.67V, at least they are both of high value and in the top of the chart.
But for a DIY battery for township area, I will focus on aluminum-graphite. Pencils and foil/can.