Large Salt water battery ideas and questions

[profitis]

lol yes..it will be of great value for survival skills to watchers

[Mungo]

dont use brass as your cathode.brass is 40% zinc.use pure copper

Will probably wind up using either plumbing copper or ground pipe stuff.  It's readily available and not so heavily alloyed .

[SeaMonkey]

SeaMonkey is your objection to these batteries power density or is it...

Not an objection really, since these kinds
of voltaic cells do have their place;  I'd think
of it as more of a preference.  I do have a
supply of materials for when I may need
them.

Chemical cells of the primary variety require
a lot of work in fabrication and maintenance
to keep them "humming."  Eventually it grows
tiring.  And there is the never ending need for
suitable metals to replace the electrodes as
they are either eaten away chemically or
otherwise deteriorate.

Once one has learned how they work and
how much it takes to keep them functional
the fun slips away and it becomes work.

Re-chargeables are just so much easier
to make use of and with proper care will
last many, many years.  I've come to really
appreciate low maintenance sources which
don't require too much work and attention
and have the oomph to handle most tasks.

As we get on up in years we tend to gravitate
to the easier ways of doing things...

[Mungo]

 
okay, just did a little experiment. 8oz salt water at 1.038 sg.  Aluminum anode immersed and copper cathode immersed: .44 volts.  Aluminum anode immersed and copper cathode essentially floating on the surface on a cloth hammock, .78 VOLTS!  Yeow.

[Mungo]

Here's the two shots, one with the electrode immersed, one with it suspended on a wet cloth at the top of the electrolyte.  Now, how do I adapt this to something more permanent.....