Improving electrosorption performance in membrane assisted capacitive deionization cells using asymmetric electrodes configuration

A. Omosebi, Z. Li, X. Gao, J. Landon, K. Liu

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

Membrane capacitive deionization (MCDI) is an emerging salt treatment technology that performs beyond the capabilities of traditional capacitive deionization cells due its ability to mitigate unwanted ion expulsion events. We present a dynamic model for observing the concentration response of deionization cells configured in a recirculating batch setup. The model consists of two volumes representing the deionization cell and the reservoir where salt storage and mixing respectively occur. The model was used to fit a typical MCDI cell made up of two similar electrodes each with potential of zero charge (EPZC) values of ∼-0.2 V vs saturated calomel electrode (SCE), and an asymmetric MCDI cell with respective anode and cathode EPZCs at ∼-0.2 and ∼+0.2 V vs. SCE. The model predicts increases of up to 50% and 10% in capacity and efficiency, respectively, for the asymmetric MCDI cell.

Original languageEnglish
Title of host publicationElectrochemical Engineering General Session
EditorsV. K. Ramani, V. Subramanian, E. J. Taylor
Pages21-30
Number of pages10
Edition21
ISBN (Electronic)9781607686446
DOIs
StatePublished - 2015
EventSymposium on Electrochemical Engineering General Session - 227th ECS Meeting - Chicago, United States
Duration: May 24 2015May 28 2015

Publication series

NameECS Transactions
Number21
Volume66
ISSN (Print)1938-6737
ISSN (Electronic)1938-5862

Conference

ConferenceSymposium on Electrochemical Engineering General Session - 227th ECS Meeting
Country/TerritoryUnited States
CityChicago
Period5/24/155/28/15

Bibliographical note

Publisher Copyright:
© The Electrochemical Society.

ASJC Scopus subject areas

  • Engineering (all)

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