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Charge Efficiency: A Functional Tool to Probe the Double-Layer Structure Inside of Porous Electrodes and Application in the Modeling of Capacitive Deionization
Open accessAbstract
Porous electrodes are important in many physical−chemical processes including capacitive deionization (CDI), a desalination technology where ions are adsorbed from solution into the electrostatic double layers formed at the electrode/solution interface inside of two juxtaposed porous electrodes. A key property of the porous electrode is the charge efficiency of the double layer, Λ, defined as the ratio of equilibrium salt adsorption over electrode charge. We present experimental data for Λ as a function of voltage and salt concentration and use this data set to characterize the double-layer structure inside of the electrode and determine the effective area for ion adsorption. Accurate experimental assessment of these two crucial properties of the electrode/solution interface enables more structured optimization of electrode materials for desalination purposes. In addition, detailed knowledge of the double-layer structure and effective area gives way to the development of more accurate dynamic process models describing CDI.
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Cited by
Theory of membrane capacitive deionization including the effect of the electrode pore space
Biesheuvel, P. M., Zhao, R., Porada, S., & van der Wal, A. (2011) · Journal of Colloid and Interface Science · doi:10.1016/j.jcis.2011.04.049 · Cited by 490
Self-citationZhao, R., Porada, S., Biesheuvel, P. M., & van der Wal, A. (2013) · Desalination · doi:10.1016/j.desal.2013.08.017 · Cited by 383
Design Considerations for Unconventional Electrochemical Energy Storage Architectures
Vlad, A., Singh, N., Galande, C., & Ajayan, P. M. (2015) · Advanced Energy Materials · doi:10.1002/aenm.201402115 · Cited by 346
Zhang, C., Ma, J., Wu, L., Sun, J., Wang, L., Li, T., & Waite, T. D. (2021) · Environmental Science & Technology · doi:10.1021/acs.est.0c06552 · Cited by 323
Diffuse charge and Faradaic reactions in porous electrodes
Biesheuvel, P. M., Fu, Y., & Bazant, M. Z. (2011) · Physical Review E · doi:10.1103/physreve.83.061507 · Cited by 293
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Metadata
- Authors
- Zhao, R., Biesheuvel, P. M., Miedema, H., Bruning, H., & van der Wal, A.
- Venue
- The Journal of Physical Chemistry Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2009-11-16
- Volume
- 1
- Issue
- 1
- Pages
- 205-210
- ISSN
- 1948-7185 (ISSN-L)
- OpenAlex
- W2027198647
- Cited by
- 393
- References
- 0
- FWCI
- 8.15
- Type
- journal article
- Language
- en
- Open access
- green
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- Zhao, R., Biesheuvel, P. M., Miedema, H., Bruning, H., & van der Wal, A. (2010). Charge Efficiency: A Functional Tool to Probe the Double-Layer Structure Inside of Porous Electrodes and Application in the Modeling of Capacitive Deionization. The Journal of Physical Chemistry Letters. https://doi.org/10.1021/jz900154h
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