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Coupling Desalination and Energy Storage with Redox Flow Electrodes

Abstract

Both freshwater shortage and energy crisis are the global issues. Herein, we presented a double-function system of Faradic desalination and redox flow battery, consisting of VCl3|NaI redox flow electrodes and a feed stream. It has a nominal cell potential (E0 = +0.79 V). During the discharge process, the salt ions in feed are extracted by redox reaction of flow electrodes, indicated by the salt removal. The stable and reversible capacity of salt removal and electricity can be achieved up to 30 cycles. The energy consumption is as low as 10.27 kJ/mol salt. The energy efficiency is up to 50% in the current aqueous redox flow battery. With energy recovery, the desalination energy consumption is extremely down to 5.38 kJ/mol, and this makes the reported lowest value to date. This “redox flow battery desalination generator” can be operated at 0.3-1.1 voltage range. Our research will supply a novel method for energy-saving desalination and redox flow battery.

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Publication details

The article was received on 04 Apr 2018, accepted on 11 Jun 2018 and first published on 11 Jun 2018


Article type: Communication
DOI: 10.1039/C8NR02737D
Citation: Nanoscale, 2018, Accepted Manuscript
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    Coupling Desalination and Energy Storage with Redox Flow Electrodes

    F. Chen, X. Hou, Q. Liang, X. HU, Y. ZHOU, Q. Ru and S. Hu, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C8NR02737D

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