Energy Efficiency of Capacitive Deionization

Li Wang, J.E. Dykstra, Shihong Lin*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

132 Citations (Scopus)


Capacitive deionization (CDI) as a class of electrochemical desalination has attracted fast-growing research interest in recent years. A significant part of this growing interest is arguably attributable to the premise that CDI is energy efficient and has the potential to outcompete other conventional desalination technologies. In this review, systematic evaluation of literature data reveals that while the absolute energy consumption of CDI is in general low, most existing CDI systems achieve limited energy efficiency from a thermodynamic perspective. We also analyze the causes for the relatively low energy efficiency and discuss factors that may lead to enhanced energy efficiency for CDI.

Original languageEnglish
Pages (from-to)3366-3378
JournalEnvironmental Science and Technology
Issue number7
Publication statusPublished - 25 Feb 2019


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