# Ionic Capacitor?

Gold Member
Hi All,

Here is my first question: (according to the picture)
A vat is filled with water and ions. The vat contains two compartments separated with a thin layer (green) (50 nanometer).

On a side there is p1 (positive ions) and n1 negative ones,
the other side contains p2 and n2 ions.

1/ first hypothesis
n1 = n2, p1 > p2

Is there a "capacitive" effect around the layer? (In other hands, does some ions move or are attracted because the ionic imbalance)

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• vat_cap_002.jpg
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## Answers and Replies

Gold Member
Hi,

Maybe the question was unclear?
I just want to know, because there is an ionic imbalance between the two sides if some ions are moving towards the "barrier"/layer? Are the n2 ions attracted closer to the layer?

Thanks in advance.

Gold Member
Hi all,

Is there a physicist out there?

Crosson
Yes, you have analyzed the situation correctly. In thermodynamics, this is called chemical or electrochemical potential.

Gold Member
Many thanks!

timeformation
you msut also consider that there will be a barrier of sorts made in the middle, it will be called a depletion region common in semiconductors of today, anyway... this will have a charge potential built across the barrier, ie. from one side of tank to the other, this potential is what gives the voltage drop for the circuit. then apply some resistance fromt he leads coming out form the top of the tank, and you have your current.

Gold Member
Hi,

I have some hard to follow your explanation.
1/ The vat is filled with electrolytes. Im' not sure there is semiconductor effect there?
2/ In the first step of my experience, there is no wires and no electrical circuit.

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