An electron transfer in CuCl-CuCl2 melt at different Cl2 partial pressures
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Electron and ion transference numbers, conductivity, and Cu+/Cu2+ concentration ratio in the CuCl-CuCl2 melt are measured at temperature of 560 °C and partial pressure of chlorine from 0.1 to 1 atm. The electron transference numbers and the total conductivity grow with chlorine partial pressure; that is accompanied by decreasing of ionic conductivity both in contribution and absolute values. The total conductivity changes from ∼6 to ∼8 S cm−1 while pCl2 increases from 0.1 to 1 atm. The electron transference numbers increase from 67 to 95% in the same chlorine partial pressure range. The electronic conductivity is evaluated by two independent methods. Values of electronic conductivity obtained from the concentrations of Cu2+ ions are close to that obtained by Faraday efficiency measurements.
KeywordsIonic-electronic melt Electronic conductivity Transference numbers Copper chlorides Electron transfer
The reported study was funded by RFBR, according to the research project no. 16-33-60095 mol_а_dk.
The research has been carried out with the equipment of the Shared Access Center “Composition of Compounds” of the Institute of High Temperature Electrochemistry.
- 1.Bredig MA (1964) Mixtures of metals with molten salts. In: Blander M (ed) Molten salt chemistry. Interscience Publishers, New York, pp 367–425Google Scholar
- 2.Danek KV (1985) “Electronic Conductivity in Ionic Melts” in Proceedings of International Symposium on Systems with the Fast Ionic Transport, Bratislava, pp 109–114Google Scholar
- 3.Budimirov MA, Redkin AA, Khokhlov VA, Batalov NN (1993) Physicochemical investigation of molten (LiCl-KCl)eut-CuCl-CuCl2 mixtures. Rasplavy 3:47–53Google Scholar
- 7.Kuznetsov SA (1991) Electrochemical behavior of copper in chloride and chloride–fluoride melts. Elektrokhimiya 27:1526–1533Google Scholar
- 8.Stenberg S, Petrescu V, Visan T, Cotarta A (1983) Electrochemical Reaction of Cu2+ and Cu+ in the LiCl–KCl Eutectic. I. Revue Roumaine de Chimi 28:565–573Google Scholar
- 11.Yolshin AN, Budimirov MA, Zakharov VV, Batalov NN (1989) Diffusion coefficients of Ni2+ in low-melting alkali-halide mixtures. Rasplavy 3:120–123Google Scholar
- 12.Timchenko AP, Shvab NA (1978) Equilibrium potentials of copper in an LiCl-KCl melt. Ukr Khim Zh 44(9):989–991Google Scholar
- 13.Timchenko AP, Shvab NA (1976) Interaction of copper(I) chloride with chlorine in chloride melts. Ukr Khim Zh 44(9):923–925Google Scholar
- 14.Timchenko AP (1983) Temperature dependence of the dissociation of molten salt mixtures based on copper(II) chloride. Ukr Khim Zh 49(9):14–16Google Scholar
- 16.Alimpiev PA, Belyaeva NA, Shevelin PY, Molchanova NG, Batalov NN (2011) Rasplavy 5:54–64Google Scholar
- 17.Yolshin AN, Shevelin PY, Batalov NN, Molchanova NG (1995) An electron-conducting CuCl-CuCl2 ionic melt as a prospective cathodic material for thermal secondary batteries in: The 19th International Power Sources Symposium, Brighton, UK, pp 431–441Google Scholar
- 18.Furman AA, Rabovskii BG (1970) Fundamentals of chemistry and technology of anhydrous chlorides. Khimiya, MoscowGoogle Scholar
- 19.Janz GJ (1967) Molten Salts Handbook. Academic Press, New YorkGoogle Scholar
- 21.Elshin AN, Shevelin PY, Molchanova NG, Batalov NN, Red’kin AA (1997) Electron transfer in the CuCl-CuCl2-LiCl melt. Russ J Electrochem 33:1299–1305Google Scholar
- 23.Elshin AN, Budimirov MA, Zakharov VV, Batalov NN (1989) Diffusion coefficients of Cu2+ and Cu+ in low-melting-point mixtures of alkali metal halides. Rasplavy 3:120–123Google Scholar