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Double-Layer Charge Density Measurement

Posted Jun 21, 2011, 12:46 p.m. EDT Version 4.3a 2 Replies

Angelo Wong
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Hi all,

So I'm trying to simulate a metal plate that undergoes a current pulse, where the metal plate is adjacent to an electrolyte medium. I was just wondering how I would go about in measuring the double-layer effect over time at the interface between the two media? I am currently using the "electric currents (ec)" module under AC/DC, but it does not seem like it accounts for the double-layer capacitance effect.

I also read Ghovanloo's "Simulation of the Capacitive Double Layer at the Interface between Microelectrodes and Cortical Tissue Using Comsol Multiphysics and SPICE Modeling," but it seems like their group uses MATLAB/SPICE to account for the capacitance, and use COMSOL for other analyses. So I was just wondering if there is a way to account for the double-layer capacitance by only using COMSOL?

Thanks in advance!
2 Replies Last Post Jun 17, 2015, 12:29 p.m. EDT
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Hello Angelo Wong

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Almuth Hoffmann
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Posted: 1 decade ago Oct 25, 2013, 7:35 a.m. EDT
Hi,

an old post, but very close to what I'm trying to simulate at the moment. I have electrodes underneath a fluidic channel and I apply a AC voltage - and now I'm interessted in the effect off the double layer for different frequencies.

Would be great if someone can share an idea how to get the double layer into the simulation!

Thanks!
Hi, an old post, but very close to what I'm trying to simulate at the moment. I have electrodes underneath a fluidic channel and I apply a AC voltage - and now I'm interessted in the effect off the double layer for different frequencies. Would be great if someone can share an idea how to get the double layer into the simulation! Thanks!
Saliya Kumara
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Posted: 9 years ago Jun 17, 2015, 12:29 p.m. EDT
Hi,

I've come across this old thread when I was looking for some help to perform a similar study. I have some electrodes in an electrolyte and I'm applying bi-phasic pulses to some electrodes while others are grounded. I'm using EC module to do this. I want to see the effects of the double layer capacitance and distribution of charges in the electrolyte. I've used Transport of Diluted Species and got it to show the charge distribution for applied voltage pulses. However it seems that the system does not simulate the effects of the double layer capacitance. Does anyone have any suggestions on getting this effect into the simulation.
Hi, I've come across this old thread when I was looking for some help to perform a similar study. I have some electrodes in an electrolyte and I'm applying bi-phasic pulses to some electrodes while others are grounded. I'm using EC module to do this. I want to see the effects of the double layer capacitance and distribution of charges in the electrolyte. I've used Transport of Diluted Species and got it to show the charge distribution for applied voltage pulses. However it seems that the system does not simulate the effects of the double layer capacitance. Does anyone have any suggestions on getting this effect into the simulation.

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