[maxvortex]

Im looking for some polymer binder and some liquid hydrophobic plastic ( maybe teflon ).
This should be used as some kind of conductive binder for iron oxide plate.

Does someone knows where to buy such things.
I can't find it on ebay...

[Arkcon]

You're looking for a polymeric binder for a metal powder, that is also conductive?  That's, in some extent, asking for too much.

[maxvortex]

I was planning to increase the volume of my 10x5 cm iron plate and to make it stronger, by adding active carbon powder and mix it with some binder.
In some documents active carbon should be very good for such purposes but it needs to be glued with something that is conductive.
There are few ways and one of them is to use mixture of : iron oxide + active carbon powder + binder and to apply this onto iron plate.
 
Other way is to use teflon. Teflon is hard to get and to expensive to i have to find some polymeric binder.  There are some sorts of conductive glue but i don't know if this should work and it this kind of glue can take higher currents ( over 1A ).

 

[curiouscat]

What's "active Carbon"?

How will you add powder to an already solid plate?

[maxvortex]

You are right, i should write activated carbon.
http://en.wikipedia.org/wiki/Activated_carbon

How to add it to solid plate
- that was my question too  .
I was thinking to use some kind of binder and polymer should be the best choice ?

Some of the guys use conductive glue for the same process but the problem with the glue is that it can not stand higher current when the cell is charged. Edison was using almost the same process when he way developing his nife battery cell. I think that activated carbon is the only real way to increase the size of the cell because in this kind of battery voltage and current depend on cell size.

This binder must be conductive....

[curiouscat]

What's your intended application?

If you merely want to "increase the volume of my 10x5 cm iron plate and to make it stronger" why don't you just cut out a larger, thicker plate? What am I missing here?   

[zoork34]

Teflon itself is not conductive at all so that wont work.

if you load enough carbon and iron into any non-conductive polymer, you will overcome the percolation threshold and make the overall composite conductive even if the polymer itself is non-conductive. 

[maxvortex]

if you load enough carbon and iron into any non-conductive polymer, you will overcome the percolation threshold

That's exactly what i was trying to do  but without success.

I mixed iron oxide + activated carbon powder + super glue and i glue this to iron plate, but there's no "shortcut" between iron plate and this mixture.

I can try to add more of carbon and oxide...

[zoork34]

Yeah, you could try increasing the loading.  You could also try switching to carbon nanotubes, which might be more electronically conductive than your activated carbon.

Also, you could try painting the glue/carbon/iron mixture onto one side of some conductive carbon cloth and then glue that to the iron plate.  You could also just try some carbon cloth by itself.  If you can press it to your iron plate with enough pressure, it might make good enough connection. 

[curiouscat]

Had you cleaned the surface prior to application? How?