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Help: simple simulation of the concentration battery
Posted 16.12.2018, 06:58 GMT-5 Chemical, Battery Design 2 Replies
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Hello everyone.
I have been plagued by the simulation of the concentration battery recently.
the model like this:
WHO CAN HELP ME I am truely thankful
my email: chenxu2656@gmail.com
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I have tried to model an ion-exchange membrane with very little of success. The problem is the fixed charges in the membrane. Only with relatively low fixed charge density I have managed to find a solution. Then I made a model using the Nernst-Planck equation only, and put for the mobility of the fixed charge a negligible value (not zero) of 1e-60. Then I got a result but I would not bet my life on it...
We have a published a book "Ionic Transport Processes"
https://global.oup.com/academic/product/ionic-transport-processes-9780198719991?cc=fi&lang=en&
where the problem is treated explicitly. It requires solving a transcendental equation. But assuming a perfect ion-exchange membrane, the transport number of the counter ion is 1 and that of co-ion zero. That simplifies the analysis hugely, and an analytical solution can be reached.
BR Lasse Murtomäki
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https://global.oup.com/academic/product/ionic-transport-processes-9780198719991?cc=fi&lang=en&
thank you very much ,I'll go back and read the book you mentioned