froot
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Daniell cell secondary?
This is something that's been bugging me to the point where I've looked, found nothing and I have to ask.
Back to the basic Zn-Cu cell and all the explanations on how it produces current flow while the redox reactions occur - fine.
But what stands in the way of it being electrically rechargeable?
There must be a crucial piece of theory here that I'm completely missing.
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bquirky
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Nothing.
They are rechargeable
But what happens over time is that the zinc electrode changes shape and looses structural integrity
Ive built one and cycled it about 20 times.
I found that the mossy bits of zinc fall down from the electrodes into the Copper sulfate and turn back in to Cu and Zinc Sulfate
[Edited on 19-1-2011 by bquirky]
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froot
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Fantastic. That was the only answer that made sense to me, thanks.
How did it perform? In terms of internal resistance, self discharge, comparative amount of energy it stored?
[Edited on 19-1-2011 by froot]
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bquirky
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yeah the internal resistance was quite high.
It put out about 100ma but it supplied that for hours and hours on end
oh and i made it in a 200ml beaker to give you some idea of size
[Edited on 19-1-2011 by bquirky]
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froot
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Great, thanks.
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