Electrochemistry of Molten Sulfides: Copper Extraction from BaS-Cu2S | Zendy

Samira Sokhanvaran | Zendy; SangKwon Lee | Zendy; Guillaume Lambotte | Zendy; Antoine Allanore | Zendy

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Electrochemistry of Molten Sulfides: Copper Extraction from BaS-Cu₂S

Author(s) -

Samira Sokhanvaran,

SangKwon Lee,

Guillaume Lambotte,

Antoine Allanore

Publication year - 2015

Publication title -

journal of the electrochemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.258

H-Index - 271

eISSN - 1945-7111

pISSN - 0013-4651

DOI - 10.1149/2.0821603jes

Subject(s) - electrolysis , electrolyte , cyclic voltammetry , copper , sulfide , electrochemistry , inorganic chemistry , electrolytic process , electrolytic cell , faraday efficiency , voltammetry , copper extraction techniques , copper sulfide , chemistry , molten salt , materials science , metallurgy , electrode

The electrolytic extraction of liquid copper at 1105°C from a molten sulfide electrolyte composed of 57 wt% BaS and 43 wt% Cu[subscript 2]S was investigated. DC cyclic voltammetry, Fourier transformed AC voltammetry, and galvanostatic electrolysis revealed that the electrodeposition of copper is possible in the selected molten sulfide electrolyte. The half wave potential for the reaction on graphite was determined, and liquid copper of high purity was obtained by galvanostatic electrolysis. These preliminary results confirm that molten sulfides free of alkaline elements could be used as an electrolyte for faradaic applications, despite the semi-conducting nature of the melt. In addition to demonstrating the need for enhanced understanding of the transport properties of such electrolyte, the results show the critical impact of the cell design to improve the process faradaic efficiency.Norco ConservationUnited States. Office of Naval Research (Contract N00014-12-1-0521

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