Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 27th March 2019 from 11:00 AM to 1:00 PM (GMT).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 8, 2019
Previous Article Next Article

Sodium ion removal by hydrated vanadyl phosphate for electrochemical water desalination

Author affiliations

Abstract

In recent years, electrochemical water desalination with battery electrode materials has emerged as a promising solution for energy-efficient salt-water desalination. Here, we report the promising desalination performance of a hydrothermally synthesized vanadyl phosphate material (mixed phases of sodium vanadyl phosphate dehydrate and vanadyl hydrogen phosphate hemihydrate) as a new electrode material. We observed robust stability of the synthesized electrode material over 280 cycles during desalination operation for 100 mM NaCl feedwater which was continuously flowing along the electrode material. During the first 100 cycles, the charge storage capacity was enhanced by 47%. This enhancement seems to be caused by a continuous conversion to vanadyl phosphate monohydrate from initial phases according to the post-mortem analysis by X-ray diffraction and infrared spectroscopy. The maximum sodium uptake capacity of the vanadyl phosphate electrode was 24.3 mg g−1 with charge efficiency of around 85%. We found no detectable level of contamination by phosphor nor vanadium from the treated water stream indicating that our synthesized electrode is also environmentally safe for water desalination applications.

Graphical abstract: Sodium ion removal by hydrated vanadyl phosphate for electrochemical water desalination

Back to tab navigation

Supplementary files

Publication details

The article was received on 19 Oct 2018, accepted on 27 Jan 2019 and first published on 29 Jan 2019


Article type: Paper
DOI: 10.1039/C8TA10087J
Citation: J. Mater. Chem. A, 2019,7, 4175-4184

  •   Request permissions

    Sodium ion removal by hydrated vanadyl phosphate for electrochemical water desalination

    J. Lee, P. Srimuk, R. Zwingelstein, R. L. Zornitta, J. Choi, C. Kim and V. Presser, J. Mater. Chem. A, 2019, 7, 4175
    DOI: 10.1039/C8TA10087J

Search articles by author

Spotlight

Advertisements