In-situ deaeration towards performance stability of capacitive deionization cells

L. Caudill, A. Omosebi, X. Gao, J. Landon, K. Liu

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

Abstract

The effects of system pressure on the performance stability of flow-through capacitive deionization (CDI) cells was investigated. Initial data showed that the highly porous carbon electrodes possessed air/oxygen in the micropores, and the increased system pressure boosts the gases solubility in saline solution and carries them out of the cell in the effluent. Upon applying a potential difference to the electrodes, capacitive-based ion adsorption occurs in competition with faradaic reactions that consume oxygen. Through the addition of backpressure, the rate of degradation decreases, allowing the cell to maintain its salt adsorption capacity (SAC) longer. The removal of oxygen from the pore space of the electrodes makes it no longer immediately accessible to faradaic reactions, thus hindering the rate of reactions and giving the competing ion adsorption an advantage that is progressively seen throughout the life of the cell.

Original languageEnglish
Title of host publicationECS Transactions
EditorsJ. A. Staser, D. Riemer
Pages43-55
Number of pages13
Edition4
ISBN (Electronic)9781607688327
DOIs
StatePublished - 2018
EventSymposium on Industrial Electrochemistry and Electrochemical Engineering General Session - 233rd ECS Meeting - Seattle, United States
Duration: May 13 2018May 17 2018

Publication series

NameECS Transactions
Number4
Volume85
ISSN (Print)1938-6737
ISSN (Electronic)1938-5862

Conference

ConferenceSymposium on Industrial Electrochemistry and Electrochemical Engineering General Session - 233rd ECS Meeting
Country/TerritoryUnited States
CitySeattle
Period5/13/185/17/18

Bibliographical note

Publisher Copyright:
© The Electrochemical Society.

ASJC Scopus subject areas

  • General Engineering

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