Copper electrodeposition from a water-containing choline chloride based deep eutectic solvent

Priscila Valverde, Todd Green, Sudipta Roy

Research output: Contribution to journalArticle

7 Citations (Scopus)
75 Downloads (Pure)

Abstract

This study investigated the effect of water on the physical and electrochemical properties of a choline chloride deep eutectic solvent (DES). Physical and electrochemical measurements were performed on the DES containing varying amounts of water. When the water content was increased from 1% to 15 wt%, the viscosity and density declined while the conductivity increased significantly. Similarly, the limiting current for Cu reduction at 15 wt% of water was also found to be three times greater than the limiting current at 1 wt% of water. This latter effect could be mostly attributed to viscosity changes, but there was evidence of deviations from ideal Stokes-Einstein behaviour. These experimental results show that inclusion of water facilitates ion mobility, and generally results in improved electrochemical characteristics.
Original languageEnglish
Pages (from-to)859-864
Number of pages6
JournalECS Transactions
Volume77
Issue number11
DOIs
Publication statusPublished - 1 Aug 2017

Keywords

  • deep eutectic solvents
  • DES
  • Stokes-Einstein behaviour
  • ionic liquids
  • ILs

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