|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||2018 Technical Division Student Poster Competition
||SPG-2: Electrochemical Reduction of Metal Oxides in Molten Salt
||Meng Shi, Haiyan Zhao, Shelly Li
|On-Site Speaker (Planned)
Electrochemical reductions of metal oxides (TiO2, NiO, etc) were investigated in molten LiCl containing 1 w.t.% Li2O at 650 °C. Reductions were carried out in an interrupted mode at various cathodic potentials and total applied charges. Current increase and decrease in current-time profiles indicated formation and reduction of intermediates. Reduced products were analyzed by X-ray diffraction (XRD). And reduction intermediates such as Li2TiO3 and LiTiO2 were detected, suggesting the multistep reduction mechanism. Cyclic voltammetries (CV) for molten salts were measured before and after reductions, and the possibility of reutilizing electrolyte is determined by comparing the CV measurements. Salt could be reused after NiO reductions but not after TiO2 reductions. The reduction potential, charges and salts conditions were investigated to optimize the reduction process. A higher reduction potential (in magnitude), more charges and fresh lithium electrolyte result in better reductions.