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Cell 10, behaving. Moving forward.

A project log for Dirty Clean Power

Super Simple Soil Microbial Fuel Cell

williamolyolsonwilliamolyolson 10/24/2019 at 17:090 Comments

No.10 is scraping 291mv & 1.04ma this morning at about 12degC.  This marks the first time this cells output has responded in an expected manner to a temp drop(by also dropping).  It will be interesting to see how/where it settles out over the next few days.  Personally, I'm ready to move forward.

I'll be mixing the substrate and firing up no.11 sometime today.  It will be my first 5 gallon fuel cell.  I'm very excited to see what it does.

I've also been thinking of other ideas for anode materials.  I'm presently using copper only because I tried it experimentally and it worked way better than I expected it would.  That and it is relatively cheap and easy to work with.

I think the next anode material I'll be working on(after no.11) will be based on some homebrew carbon.  Probably sucrose to start with, I've found it can be foamed to nearly any rough shape in a proper steel container, just using a small fire.  I've done this a few times for previous investigations and the resultant material seems perfect.  It forms a fairly sturdy conductive glass-like carbon, not the greatest surface area, but better than the copper mesh.  

The only reason I haven't done it already is because I'm still trying to figure out the best way to connect a conductor to it.  I have a few ideas, and there's always the "poke a wire in it" method, but I know something clever will find me.  For instance, the idea of encapsulating a conductor in the foam keeps getting stuck in my head.  It seems like the best method, but will likely require some titanium or at least SS wire to survive the 3+ hours at 1000degC the carbon takes to become conductive...

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