Please use this identifier to cite or link to this item: doi:10.22028/D291-29111
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Title: Concentration-Gradient Multichannel Flow-Stream Membrane Capacitive Deionization Cell for High Desalination Capacity of Carbon Electrodes
Author(s): Kim, Choonsoo
Lee, Juhan
Srimuk, Pattarachai
Aslan, Mesut
Presser, Volker
Language: English
Title: ChemSusChem
Volume: 10
Issue: 24
Startpage: 4914
Endpage: 4920
Publisher/Platform: Wiley
Year of Publication: 2017
Publikation type: Journal Article
Abstract: We present a novel multichannel membrane flow-stream capacitive deionization (MC-MCDI) concept with two flow streams to control the environment around the electrodes and a middle channel for water desalination. The introduction of side channels to our new cell design allows operation in a highly saline environment, while the feed water stream in the middle channel (conventional CDI channel) is separated from the electrodes with anion- and cation-exchange membranes. At a high salinity gradient between side (1000 mm) and middle (5 mm) channels, MC-MCDI exhibited an unprecedented salt-adsorption capacity (SAC) of 56 mg g-1 in the middle channel with charge efficiency close to unity and low energy consumption. This excellent performance corresponds to a fourfold increase in desalination performance compared to the state-of-the-art in a conventional CDI cell. The enhancement originates from the enhanced specific capacitance in high-molar saline media in agreement with the Gouy-Chapman-Stern theory and from a double-ion desorption/adsorption process of MC-MCDI through voltage operation from -1.2 to +1.2 V.
DOI of the first publication: 10.1002/cssc.201700967
Link to this record: hdl:20.500.11880/28023
ISSN: 1864-564X
Date of registration: 8-Oct-2019
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Department: NT - Materialwissenschaft und Werkstofftechnik
Professorship: NT - Prof. Dr. Volker Presser
Collections:UniBib – Die Universitätsbibliographie

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