Working Air Battery

[AL Electro]

Wow fast response. I tried responding last night but kept getting an error message on the forum. I won't put them in oil lol...

Yes I watched all your videos and read this thread. I ordered the 3 X 10 inch rods from graphitestore.com. (End to end resistance of roughly .7 Ohm) They take almost one roll of the magnesium.
500 milliamps sounds great for the 4 inch. I'm scraching my head here...  I just want to reproduce the results you obtained, or somehing close.

Far as the construction went, the windings are perfect with roughly 1/8th gap and I used a blue shop paper towel held with small strips of cotton tape and wrapped the coil nice and tight. The ends of the winding are held with a clear medical tape that's waterproof and perforated. I used this tape on a wound I had on my back recently and it's very sticky. After a hot shower it's sill hard to remove so figured it would be great for these batteries.


Here's a picture of one of the cells with the left over magnesium.

Thank you

Dave

Edit: Dang. Some reason this forum is different. I'll have to see why the image doesn't show up.


Here's a direct link. The cell is sitting on a DVD in case you were wondering what that disk was.
http://i382.photobucket.com/albums/oo266/Kargons/IMG-20111103-00034.jpg

[AL Electro]

Oh, by the way the open cell voltage is about 1.5-1.7V when dry. I tried different's salts for the saline water mix to see if that was the problem. Tested wet and dry. The salts were highly concentrated solutions of distilled water and either Kosher salt, Iodized or Epsom salt.

I applied only epsom salt to my second cell to just mess around. Epsom is pretty hygroscopic so would seem good for this design. I applied three coats and placed the cell in an oven between each coat. Maybe overkill but it seems to absorb moisture quickly.

Here's the picture (direct link) of the epsom salt crystals. Really wish I could get some amperage...... Tested continuity between magnesium and graphite. readings are 22.5M ohms dry (just measured) and sub K ohm (if I remember correctly) when wet.

Picture of cell: (direct link)
http://i382.photobucket.com/albums/oo266/Kargons/SanDiego-20111105-00044.jpg

[Blaine]

Try exploiting the Hall effect everyone.  It might give everyone something to think about when making their air batteries.