Polymer-coated composite anodes for efficient and stable capacitive deionization

X. Gao; A. Omosebi; N. Holubowitch; A. Liu; K. Ruh; J. Landon; K. Liu

doi:10.1016/j.desal.2016.08.006

Polymer-coated composite anodes for efficient and stable capacitive deionization

X. Gao, A. Omosebi, N. Holubowitch, A. Liu, K. Ruh, J. Landon, K. Liu

Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

56 Scopus citations

Abstract

In the contemporary literature, diminished salt removal in a CDI device is primarily due to carbon oxidation at the anode in aqueous solutions. Therefore, an anion exchange polymer is used to prepare a composite carbon as a CDI anode. Results from repetitive CDI testing shows that more efficient and consistent long-term salt removal is achieved when a flow-through CDI stack is configured with composite anodes compared to polymer-free anodes. Analysis of the effluent pH and steady-state current indicates that this performance improvement may be due to the minimization of parasitic reactions by shielding of the carbon electrodes with the selective polymer layer coated at the anode.

Original language	English
Pages (from-to)	16-20
Number of pages	5
Journal	Desalination
Volume	399
DOIs	https://doi.org/10.1016/j.desal.2016.08.006
State	Published - Dec 1 2016

Bibliographical note

Funding Information:
This work was supported by the U.S.-China Clean Energy Research Center, U.S. Department of Energy [ DE-PI0000017 ]; and the National Science Foundation [ 1520226 ].

Publisher Copyright:
© 2016

Keywords

Capacitive deionization
Carbon oxidation
Effluent pH
Performance degradation
Polymer-coated carbon

ASJC Scopus subject areas

Chemistry (all)
Chemical Engineering (all)
Materials Science (all)
Water Science and Technology
Mechanical Engineering

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10.1016/j.desal.2016.08.006

Cite this

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abstract = "In the contemporary literature, diminished salt removal in a CDI device is primarily due to carbon oxidation at the anode in aqueous solutions. Therefore, an anion exchange polymer is used to prepare a composite carbon as a CDI anode. Results from repetitive CDI testing shows that more efficient and consistent long-term salt removal is achieved when a flow-through CDI stack is configured with composite anodes compared to polymer-free anodes. Analysis of the effluent pH and steady-state current indicates that this performance improvement may be due to the minimization of parasitic reactions by shielding of the carbon electrodes with the selective polymer layer coated at the anode.",

keywords = "Capacitive deionization, Carbon oxidation, Effluent pH, Performance degradation, Polymer-coated carbon",

author = "X. Gao and A. Omosebi and N. Holubowitch and A. Liu and K. Ruh and J. Landon and K. Liu",

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T1 - Polymer-coated composite anodes for efficient and stable capacitive deionization

AU - Gao, X.

AU - Omosebi, A.

AU - Holubowitch, N.

AU - Liu, A.

AU - Ruh, K.

AU - Landon, J.

AU - Liu, K.

N1 - Funding Information: This work was supported by the U.S.-China Clean Energy Research Center, U.S. Department of Energy [ DE-PI0000017 ]; and the National Science Foundation [ 1520226 ]. Publisher Copyright: © 2016

PY - 2016/12/1

Y1 - 2016/12/1

N2 - In the contemporary literature, diminished salt removal in a CDI device is primarily due to carbon oxidation at the anode in aqueous solutions. Therefore, an anion exchange polymer is used to prepare a composite carbon as a CDI anode. Results from repetitive CDI testing shows that more efficient and consistent long-term salt removal is achieved when a flow-through CDI stack is configured with composite anodes compared to polymer-free anodes. Analysis of the effluent pH and steady-state current indicates that this performance improvement may be due to the minimization of parasitic reactions by shielding of the carbon electrodes with the selective polymer layer coated at the anode.

AB - In the contemporary literature, diminished salt removal in a CDI device is primarily due to carbon oxidation at the anode in aqueous solutions. Therefore, an anion exchange polymer is used to prepare a composite carbon as a CDI anode. Results from repetitive CDI testing shows that more efficient and consistent long-term salt removal is achieved when a flow-through CDI stack is configured with composite anodes compared to polymer-free anodes. Analysis of the effluent pH and steady-state current indicates that this performance improvement may be due to the minimization of parasitic reactions by shielding of the carbon electrodes with the selective polymer layer coated at the anode.

KW - Capacitive deionization

KW - Carbon oxidation

KW - Effluent pH

KW - Performance degradation

KW - Polymer-coated carbon

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Polymer-coated composite anodes for efficient and stable capacitive deionization

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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