期刊
JOURNAL OF PHYSICS-CONDENSED MATTER
卷 29, 期 8, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1361-648X/29/8/084003
关键词
desalination; capacitive deionization; surface transport; electric double layers
资金
- Israel Science Foundation in the framework of the Israel National Research Center for Electrochemical Propusion (INREP) project
Capacitive deionization (CDI) is a technology in which water is desalinated by ion electrosorption into the electric double layers (EDLs) of charging porous electrodes. In recent years significant advances have been made in modeling the charge and salt dynamics in a CDI cell, but the possible effect of surface transport within diffuse EDLs on these dynamics has not been investigated. We here present theory which includes surface transport in describing the dynamics of a charging CDI cell. Through our numerical solution to the presented models, the possible effect of surface transport on the CDI process is elucidated. While at some model conditions surface transport enhances the rate of CDI cell charging, counter-intuitively this additional transport pathway is found to slow down cell charging at other model conditions.
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