Electrodeposition of aluminium on the copper substrate using two different chloroaluminate ionic liquid electrolytes such as AlCl 3 /1-Butyl-3-methylimidazolium chloride electrolyte (AlCl 3 -BMIC) and AlCl 3 /1-Ethyl-3-methylimidazolium chloride electrolyte (AlCl 3 -EMIC) were studied. Cyclic voltammetry studies reveal the aluminium deposition process follows two steps mechanism in AlCl 3 -EMIC electrolytes and in AlCl 3 -BMIC electrolytes, it follows single-step mechanism. The AlCl 3 -EMIC electrolytes permit wide deposition current density window than the AlCl 3 -BMIC electrolytes for aluminium deposition with good properties. The aluminium deposits obtained from AlCl3-EMIC electrolyte have better surface properties than the deposits obtained from AlCl 3 -BMIC electrolyte. Detailed comparative studies of deposits obtained from these two electrolytes with respect to deposition mechanism, deposition efficiency and deposition current density window were done. The deposit properties such as surface morphology, microstructure and crystal structures were also compared. From this study, we observed the AlCl 3 -EMIC electrolyte gives good quality deposits than AlCl 3 -BMIC electrolyte.
Polymer blend composed of poly(vinyl chloride) and poly(ethyl methacrylate) with lithium perchlorate (LiClO 4) and the plasticizer ethylene carbonate (EC) mixture with propylene carbonate, γ-butyrolactone (GBL), dibutyl phthalate and diethyl carbonate have been synthesized using the solution casting technique. Structural changes and thermal stability of the films were resolved using X-ray diffraction analysis and thermogravimetric/differential thermal analysis, respectively. The membrane that contains EC+ GBL exhibits maximum ionic conductivity of the order of 1.208×10 −3 S cm −1 at 303 K. The temperature-dependent ionic conductivity of the polymer membranes has been estimated using AC impedance analysis.
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