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Title: Effect of Water on Zn Electrodeposition from a Deep Eutectic Solvent
Authors: Lahiri, A
Hirani, P
Haghani, S
Endres, F
Issue Date: 23-Jan-2024
Publisher: IOP Publishing on behalf of The Electrochemical Society
Citation: Lahiri, A. et al. (2024) 'Effect of Water on Zn Electrodeposition from a Deep Eutectic Solvent', Journal of the Electrochemical Society, 171 (1), 012505, pp. 1 - 7. doi: 10.1149/1945-7111/ad1d99.
Abstract: The electrodeposition of Zn films from a deep eutectic solvent (DES) of ZnCl2 and formamide and its mixture with water was studied. From spectroscopic analyses it was observed that water up to 30 v/v% does not change the Zn coordination in the electrolyte after which significant change in the coordination was observed. Electrochemical studies showed that with increase in water concentration in the DES, higher deposition/stripping current was achieved which was related to lowering of viscosity. The Zn deposit morphology changed significantly with water concentration. At low concentrations of water (up to 20 v/v%), porous Zn nanoplates formed whereas the morphology changed to a dense hexagonal structure on increasing the water concentration. X-ray diffraction results confirmed that at low water concentrations (up to 20 v/v%) Zn-Cu alloy formed. Above 20 v/v% water concentration in the DES, Zn peaks evolved with Zn-Cu alloy forming a shoulder. Based on the electrochemical and spectroscopic studies, it appears that 20–30 v/v% water is the critical region wherein significant changes occur from a DES rich region to a water-rich region.
Description: Data Availability Statement: Data have been made available in Brunel University London's repository via Brunel Figshare database.
ISSN: 0013-4651
Other Identifiers: ORCID iD: Abhishek Lahiri
ORCID iD: Sophia Haghani
ORCID iD: Frank Endres
Appears in Collections:The Experimental Techniques Centre
Dept of Chemical Engineering Research Papers

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