Please use this identifier to cite or link to this item: doi:10.22028/D291-35262
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Title: Ionophobicity of carbon sub-nanometer pores enables efficient desalination at high salinity
Author(s): Zhang, Yuan
Prehal, Christian
Jiang, Huili
Liu, Yang
Feng, Guang
Presser, Volker
Language: English
Title: Cell reports
Volume: 3
Issue: 1
Publisher/Platform: Elsevier
Year of Publication: 2022
Publikation type: Journal Article
Abstract: Electrochemical seawater desalination has drawn significant attention as an energy-efficient technique to address the global issue of water remediation. Microporous carbons, that is, carbons with pore sizes smaller than 2 nm, are commonly used for capacitive deionization. However, micropores are ineffective for capacitive deionization at high molar strength because of their inability to permselectively uptake ions. In our work, we combine experimental work with molecular dynamics simulation and reveal the ability of sub-nanometer pores (ultramicropores) to effectively desalinate aqueous media at seawater-like molar strength. This is done without any ion-exchange membrane. The desalination capacity in 600 mM reaches 12 mg/g, with a charge efficiency of 94% and high cycling stability over 200 cycles (97% of charge efficiency retention). Using molecular dynamic simulations and providing experimental data, our work makes it possible both to understand and to calculate desalination capacity and charge efficiency at high molar strength as a function of pore size.
DOI of the first publication: 10.1016/j.xcrp.2021.100689
URL of the first publication: https://www.sciencedirect.com/science/article/pii/S2666386421004148
Link to this record: hdl:20.500.11880/32723
http://dx.doi.org/10.22028/D291-35262
ISSN: 2666-3864
Date of registration: 5-Apr-2022
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Department: NT - Materialwissenschaft und Werkstofftechnik
Professorship: NT - Prof. Dr. Volker Presser
Collections:Die Universitätsbibliographie

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