%0 Journal Article
%T Effect of Li Ions on Al Electrodeposition from Dimethylsulfone
%A Sangjae Kim
%A Shota Kumeno
%A Kenta Kamebuchi
%A Kensuke Kuroda
%A Masazumi Okido
%J Journal of Surface Engineered Materials and Advanced Technology
%P 110-125
%@ 2161-489X
%D 2018
%I Scientific Research Publishing
%R 10.4236/jsemat.2018.84010
%X The influence of LiCl coexistence with Al electrodeposition was investigated in a dimethyl sulfone, DMSO<sub>2</sub>, bath containing AlCl<sub>3</sub> at 403 K. The electrochemical behaviors of Li and Al ions were examined using Pt electrodes in the bath and the deposition mechanism was analyzed by cyclic voltammetry, CV, with an Al reference electrode in the bath. The coexistence of LiCl in the AlCl<sub>3</sub>-DMSO<sub>2</sub> bath inhibited the cathodic current corresponding to Al deposition in the CV experiment. The amount of ca. 500 ¦̀mol Al deposits was obtained in constant potential electrolysis for 1 h at ¨C2 V in the bath with 10 mol% AlCl<sub>3</sub>. However, it decreased to 140 ¦̀mol Al in the bath with 10 mol% AlCl<sub>3</sub> and 5 mol% LiCl. It was clarified that LiCl addition led to the formation of Li(DMSO<sub>2</sub>)<sup>+</sup> more than the formation of <img src=\"Edit_470dcb44-1b15-42c2-a9b1-c75d0424084f.png\" alt=\"\" />&nbsp;from NMR measurement for the baths. This results in the suppression of Al deposition because LiCl inhibits the formation of <img src=\"Edit_ed7469ae-49f5-474e-ad4d-d44f76f89435.png\" alt=\"\" /> complex ions, which is said to be necessary for Al electrodeposition.
%K Electrodeposition
%K Aluminum
%K Lithium
%K Nuclear Magnetic Resonance
%K Dimethylsulfone
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=87814