Journal
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
Volume 27, Issue 6, Pages 1423-1431Publisher
SPRINGER
DOI: 10.1007/s10008-023-05510-0
Keywords
Dual-ion electrochemical deionization; Battery electrode materials; Capacitive electrode materials; MOF-derived carbon; Prussian blue; Bismuth oxychloride
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Capacitive deionization (CDI) has been considered as a novel technology to relieve freshwater shortages. However, due to the limited physical adsorption capacity, the salt removal capacity remains low. To enhance the desalination capacity, a dual-ion electrochemical deionization (DEDI) device with a Prussian blue/carbon framework (PB/CF) and BiOCl/CF materials was developed. The system showed high desalination capacity, cycling stability, and rapid desalination, making it a promising solution for future desalination designs.
Capacitive deionization (CDI) has been considered as a novel technology to relieve freshwater shortages. However, due to the limited physical adsorption capacity, the salt removal capacity remains low. To enhance the desalination capacity, battery type, and capacitive materials are employed to fabricate a dual-ion electrochemical deionization (DEDI) device. Herein, a Prussian blue/carbon framework (PB/CF) and BiOCl/CF were prepared by in situ conversion with a MOF-derived carbon framework as the precursor. A PB/CF composite was used as the sodium electrode, and BiOCl/CF was used as the chloride electrode. This system achieved high desalination capacity, excellent cycling stability, and rapid desalination. The maximum desalination capacity was 163 mg g(-1) at 100 mA g(-1), and the desalination rate was 0.631 mg g(-1) s(-1) at a high current density of 1000 mA g(-1). The outstanding desalination performance of this system arose from the synergistic effect of combining battery materials with a carbon framework for deionization and offers potential for future desalination designs.
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