Characterization of Resistances of a Capacitive Deionization System
Abstract
Capacitive deionization (CDI) is a promising desalination technology, which operates at low pressure, low temperature, requires little infrastructure, and has the potential to consume less energy for brackish water desalination. However, CDI devices consume significantly more energy than the theoretical thermodynamic minimum, and this is at least partly due to resistive power dissipation. We here report our efforts to characterize electric resistances in a CDI system, with a focus on the resistance associated with the contact between current collectors and porous electrodes. We present an equivalent circuit model to describe resistive components in a CDI cell. We propose measurable figures of merit to characterize cell resistance. We also show that contact pressure between porous electrodes and current collectors can significantly reduce contact resistance. As a result, we propose and test an alternative electrical contact configuration which uses a pore-filling conductive adhesive (silver epoxy) and achieves significant reductions in contact resistance.
- Authors:
-
- Stanford Univ., Stanford, CA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Stanford Univ., Stanford, CA (United States)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1408994
- Report Number(s):
- LLNL-JRNL-663458
Journal ID: ISSN 0013-936X; TRN: US1702957
- Grant/Contract Number:
- AC52-07NA27344
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Environmental Science and Technology
- Additional Journal Information:
- Journal Volume: 49; Journal Issue: 16; Journal ID: ISSN 0013-936X
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
Citation Formats
Qu, Yatian, Baumann, Theodore F., Santiago, Juan G., and Stadermann, Michael. Characterization of Resistances of a Capacitive Deionization System. United States: N. p., 2015.
Web. doi:10.1021/acs.est.5b02542.
Qu, Yatian, Baumann, Theodore F., Santiago, Juan G., & Stadermann, Michael. Characterization of Resistances of a Capacitive Deionization System. United States. https://doi.org/10.1021/acs.est.5b02542
Qu, Yatian, Baumann, Theodore F., Santiago, Juan G., and Stadermann, Michael. Mon .
"Characterization of Resistances of a Capacitive Deionization System". United States. https://doi.org/10.1021/acs.est.5b02542. https://www.osti.gov/servlets/purl/1408994.
@article{osti_1408994,
title = {Characterization of Resistances of a Capacitive Deionization System},
author = {Qu, Yatian and Baumann, Theodore F. and Santiago, Juan G. and Stadermann, Michael},
abstractNote = {Capacitive deionization (CDI) is a promising desalination technology, which operates at low pressure, low temperature, requires little infrastructure, and has the potential to consume less energy for brackish water desalination. However, CDI devices consume significantly more energy than the theoretical thermodynamic minimum, and this is at least partly due to resistive power dissipation. We here report our efforts to characterize electric resistances in a CDI system, with a focus on the resistance associated with the contact between current collectors and porous electrodes. We present an equivalent circuit model to describe resistive components in a CDI cell. We propose measurable figures of merit to characterize cell resistance. We also show that contact pressure between porous electrodes and current collectors can significantly reduce contact resistance. As a result, we propose and test an alternative electrical contact configuration which uses a pore-filling conductive adhesive (silver epoxy) and achieves significant reductions in contact resistance.},
doi = {10.1021/acs.est.5b02542},
journal = {Environmental Science and Technology},
number = 16,
volume = 49,
place = {United States},
year = {Mon Jul 27 00:00:00 EDT 2015},
month = {Mon Jul 27 00:00:00 EDT 2015}
}
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Works referencing / citing this record:
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