Global water scarcity is one of urgent issues these days. As a means to cope with this situation, capacitive deionization (CDI) is attracting attentions with recent advancements. CDI is a process for converting saline water to fresh water in which ionic species are captured in porous electrodes by electrostatic force. So far, various carbon electrodes were synthesized and deionization performance was evaluated but little is known about requirements as an electrode for CDI. In this study, two types of carbon electrodes were selected which showed similar electrochemical properties with different wettability. Deionization performance was tested in CDI module using 10 mM NaCl solution and deionization capacity was evaluated. As a result, the carbon electrode which had more hydrophilic surface showed better deionization performance, suggesting accessibility would play an important role in CDI.

Capacitive deionization for converting energy into water: Role of carbon electrode properties

244th National Meeting (2012)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.