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Characterization of LiCl–KCl Eutectic and LiCl–KCl + H2O Mixtures Using Electrochemical Impedance Spectroscopy

  • Litun Swain
  • Gurudas Pakhui
  • Suddhasattwa Ghosh
  • Bandi Prabhakara ReddyEmail author
Conference paper
  • 114 Downloads
Part of the The Minerals, Metals & Materials Series book series (MMMS)

Abstract

Electrochemical impedance spectroscopy was used to investigate redox behaviour of moisture containing LiCl–KCl eutectic melts at tungsten and uranium electrodes. Complex impedance plots recorded at uranium electrode were complicated by competing process of adsorption of OH\(^{-}\) leading to large capacitive contribution. This was explained on the basis of resistance due to formation of hydroxide film on surface of uranium electrode that inhibited anodic dissolution of uranium. Complex impedance plots were fitted to different equivalent circuits and variation in redox behaviour was explained.

Keywords

Pyroprocessing Moisture Cyclic voltammetry Electrochemical impedance spectroscopy 

Nomenclature

\(R_{s}\)

Electrolyte resistance

\(R_{ct}\)

Charge transfer resistance

\(R_{f}\)

Film resistance

W

Warburg impedance

\(Q_{i}\)

Constant Phase Element (CPE)

\(Y^{\circ }\)

Admittance function

References

  1. 1.
    Burris L (1986) Rekindled interest in pyrometallurgical processing. Chem Eng Prog 82:35–39Google Scholar
  2. 2.
    Ghosh S, Reddy BP, Nagarajan K, Kumar KCH (2014) Experimental investigations and thermodynamic modelling of KCl–LiCl–UCl\(_{3}\) system. CALPHAD 45:11–26CrossRefGoogle Scholar
  3. 3.
    Yang L, Hudson RG (1959) Equilibrium electrode potentials of some metal-chlorine galvanic cells and activities of some metal chlorides in LiCl–KCl eutectic melt. Trans Met Soc AIME 215:589–601Google Scholar
  4. 4.
    Yang L, Hudson RG (1959) Some investigations of the Ag\(\vert \)AgCl in LiCl–KCl eutectic reference electrode. J Electrochem Soc 106:986–990CrossRefGoogle Scholar

Copyright information

© The Minerals, Metals & Materials Society 2020

Authors and Affiliations

  • Litun Swain
    • 1
  • Gurudas Pakhui
    • 2
  • Suddhasattwa Ghosh
    • 2
  • Bandi Prabhakara Reddy
    • 2
    Email author
  1. 1.Homi Bhabha National Institute (HBNI)Indira Gandhi Centre for Atomic ResearchKalpakkamIndia
  2. 2.Materials Chemistry & Metal Fuel Cycle GroupIndira Gandhi Centre for Atomic ResearchKalpakkamIndia

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