Issue 26, 2019

Low voltage operation of a silver/silver chloride battery with high desalination capacity in seawater

Abstract

Technologies for the effective and energy efficient removal of salt from saline media for advanced water remediation are in high demand. Capacitive deionization using carbon electrodes is limited to highly diluted salt water. Our work demonstrates the high desalination performance of the silver/silver chloride conversion reaction by a chloride ion rocking-chair desalination mechanism. Silver nanoparticles are used as positive electrodes while their chlorination into AgCl particles produces the negative electrode in such a combination that enables a very low cell voltage of only Δ200 mV. We used a chloride-ion desalination cell with two flow channels separated by a polymeric cation exchange membrane. The optimized electrode paring between Ag and AgCl achieves a low energy consumption of 2.5 kT per ion when performing treatment with highly saline feed (600 mM NaCl). The cell affords a stable desalination capacity of 115 mg g−1 at a charge efficiency of 98%. This performance aligns with a charge capacity of 110 mA h g−1.

Graphical abstract: Low voltage operation of a silver/silver chloride battery with high desalination capacity in seawater

Supplementary files

Article information

Article type
Paper
Submitted
05 Apr 2019
Accepted
07 Mai 2019
First published
14 Mai 2019
This article is Open Access
Creative Commons BY license

RSC Adv., 2019,9, 14849-14858

Low voltage operation of a silver/silver chloride battery with high desalination capacity in seawater

P. Srimuk, S. Husmann and V. Presser, RSC Adv., 2019, 9, 14849 DOI: 10.1039/C9RA02570G

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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