Journal: RSC Advances

Article Title: Rational methodology of V–Al alloy-electrorefining protocols promotes high purity vanadium metal

doi: 10.1039/d5ra05411g

Figure Lengend Snippet: (a) CV curves in KCl–LiCl molten salt before (black dashed line) and after (red line) V–Al alloy dissolution for 6 h; (b) CV curves in KCl–LiCl molten salt after V–Al alloy dissolution for 6 h; (c) SWV of vanadium ions dissolved from V–Al alloy; (d) comparison of CV curves before and after adding F ions.

Article Snippet: In this study, a eutectic salt of KCl and LiCl in a molar ratio of 55 : 45 (KCl, purity 99.8%, LiCl, purity 99.8%, purchased from Macklin Biochemical Co., Ltd) was used as the electrolyte, with a total weight of 100 g. Before electrolysis, KCl and LiCl were mixed uniformly and vacuum-dried at 300 °C for 3 h to remove excess moisture, then heated to 500 °C and maintained at this temperature for 12 h for pre-electrolysis.

Techniques: Dissolution, Comparison

Journal: RSC Advances

Article Title: Rational methodology of V–Al alloy-electrorefining protocols promotes high purity vanadium metal

doi: 10.1039/d5ra05411g

Figure Lengend Snippet: (a) CV in KCl–LiCl after V–Al dissolution for 6 h at various scan rates; (b) the relationship between the current density and the square root of scan rate. Inset: relationship between peak potential and logarithm of scan rate; (c) CV in KCl–LiCl–KF after V–Al dissolution for 6 h at various scan rates. (d) The relationship between the current density and the square root of scan rate; (e) SWV in KCl–LiCl after V–Al dissolution for 6 h at various scan rates; (f) the relationship between the current density and the square root of frequency in KCl–LiCl; (g) SWV in KCl–LiCl–KF molten salt after V–Al dissolution for 6 h; (h) the relationship between the current density and the square root of frequency; MSD curve of V 3+ (i) before adding F ions; (j) after adding F ions; (k) the diffusion coefficient calculated by three methods before and after adding F ions.

Article Snippet: In this study, a eutectic salt of KCl and LiCl in a molar ratio of 55 : 45 (KCl, purity 99.8%, LiCl, purity 99.8%, purchased from Macklin Biochemical Co., Ltd) was used as the electrolyte, with a total weight of 100 g. Before electrolysis, KCl and LiCl were mixed uniformly and vacuum-dried at 300 °C for 3 h to remove excess moisture, then heated to 500 °C and maintained at this temperature for 12 h for pre-electrolysis.

Techniques: Dissolution, Diffusion-based Assay

Journal: RSC Advances

Article Title: Rational methodology of V–Al alloy-electrorefining protocols promotes high purity vanadium metal

doi: 10.1039/d5ra05411g

Figure Lengend Snippet: (a) Current curves in LiCl–KCl molten salt at −0.6 V; (b) plot of ( I / I m ) 2 and ( t / t m ) compared with theoretical curves at −0.6 V; (c) SEM images of the transient nucleation in the molten salt and the results of EDS analysis at point A; (d) current curves in LiCl–KCl molten salt at −0.9 V; (e) plot of ( I / I m ) 2 and ( t / t m ) compared with theoretical curves at −0.9 V; (f) SEM images of the progressive nucleation in the molten salt and the results of EDS analysis at point B.

Article Snippet: In this study, a eutectic salt of KCl and LiCl in a molar ratio of 55 : 45 (KCl, purity 99.8%, LiCl, purity 99.8%, purchased from Macklin Biochemical Co., Ltd) was used as the electrolyte, with a total weight of 100 g. Before electrolysis, KCl and LiCl were mixed uniformly and vacuum-dried at 300 °C for 3 h to remove excess moisture, then heated to 500 °C and maintained at this temperature for 12 h for pre-electrolysis.

Techniques: