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A dual-ion electrochemistry deionization system based on AgCl-NMO Electrodes

Abstract

Novel desalination technologies with high ion removal capacity and low energy consumption are desirable to tackle the water shortage challenge. Herein, we report a dual-ion electrochemistry deionization (DEDI) system with silver chloride as electrochemical chloride release/capture anode, sodium manganese oxide as electrochemical sodium release/capture cathode, and flow salt solution as electrolyte. Sodium and chloride ions are synergistically released to flow electrolyte feed at positive current applied. Under a negative current condition, the two ions are extracted from flow electrolyte feed to their corresponding electrodes at the same time, which can cause a conductivity decrease indicating salt removal. The salt absorption/desorption capacity of the novel deionization system is stable and reversible with a salty removal capacity more 57.4 mg g-1 for 100 cycles, which is much higher than that obtained by normal or hybrid capacitive deionization devices. The charge efficiency is 0.979/0.956 during salt desorption/absorption process. This research will be of great significance for low energy consumption seawater desalination.

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Publication details

The article was received on 16 Mar 2017, accepted on 02 Jun 2017 and first published on 05 Jun 2017


Article type: Paper
DOI: 10.1039/C7NR01861D
Citation: Nanoscale, 2017, Accepted Manuscript
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    A dual-ion electrochemistry deionization system based on AgCl-NMO Electrodes

    F. Chen, Y. Huang, L. Guo, M. Ding and H. Y. Yang, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR01861D

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