Electro-diffusion of ions in porous electrodes for capacitive extraction of renewable energy from salinity differences
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Bazant_Electro-diffusion.pdf
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949.94 KB
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Author(s)
Rica, Raul A.
Ziano, Roberto
Salerno, Domenico
Mantegazza, Francesco
Bazant, Martin Z.
Brogioli, Doriano
Date Issued
January 2013
Journal
Electrochimica Acta
Publisher
Elsevier
Citation
Rica, Raul A., Roberto Ziano, Domenico Salerno, Francesco Mantegazza, Martin Z. Bazant, and Doriano Brogioli. “Electro-Diffusion of Ions in Porous Electrodes for Capacitive Extraction of Renewable Energy from Salinity Differences.” Electrochimica Acta 92 (March 2013): 304–314. © 2013 Elsevier Ltd.
Version
Final published version
Abstract
One dimensional theory of the electro-diffusion of ions in activated carbon porous electrodes is applied to describe the dynamic cycle of the capacitive mixing (CAPMIX) based on the double layer expansion (CDLE) technique to harvest renewable energy from salinity gradients. The model combines the electro-diffusion of ions with adsorption and desorption of charge and neutral salt into the double layers at the solid liquid interface, providing a comprehensive and accurate description of the full CAPMIX cycle experimentally measured in prototype cells. A careful analysis of the simulated cycles identifies key parameters for the optimization of the extracted power, like the appropriate thickness and micro-structure of the electrodes, best materials and operation conditions of the electrochemical cell. These directions will be fundamental in the development of this technique as an economically competitive renewable energy source.
MIT Department
Massachusetts Institute of Technology. Department of Chemical Engineering
Massachusetts Institute of Technology. Department of Mathematics
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
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DOI of Published Version
https://doi.org/10.1016/j.electacta.2013.01.063
