Al Film Electrodeposition from the AlCl3-EMIC Electrolyte under a Magnetic Field. Issue 8 (9th May 2017)

• Record Type: Journal Article
• Authors: Takahashi, Hitomi; Matsushima, Hisayoshi; Ueda, Mikito
• Is Part Of: Journal of the Electrochemical Society. Volume 164:Issue 8(2017)
• Page Start: H5165
• Page End: H5168
• Publication Date: 2017-05-09
• Subjects: Al -- ionic liquid -- magnetic field -- MHD; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0161708jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : The surface structure of Al films electrodeposited in a magnetic field was studied in a AlCl3 -1ethyl-3methylimidazolium chloride (EMIC) mixture ionic liquid, focusing on the surface morphology and crystal orientation. Current-dependent measurements reveal two preferential orientations. First, at small current densities ( i < 10 mA cm −2 ), a (111) plane is preferentially oriented parallel to the surface where no magnetic field is detected. Second, at high current densities ( i > 10 mA cm −2 ), a (200) plane is selectively grown, where the mass transportation of Al(III) is promoted by magneto-hydrodynamic (MHD) convection. Correlations of these data with scanning electron microscope observations showing tabular-facet formation in the magnetic field suggest that these structural variations are induced by microscopic MHD, demonstrating the difference between this process and that existing in an aqueous system.