Electrodeposition of aluminium from 1-butyl-1-methylpyrrolidinium chloride/AlCl3 and mixtures with 1-ethyl-3-methylimidazolium chloride/AlCl3
2012; Elsevier BV; Volume: 70; Linguagem: Inglês
10.1016/j.electacta.2012.03.056
ISSN1873-3859
AutoresGiridhar Pulletikurthi, Sherif Zein El Abedin, Frank Endres,
Tópico(s)Electrical and Thermal Properties of Materials
ResumoIn this paper we show that nanocrystalline aluminium can be electrodeposited from the ionic liquid 1-butyl-1-methylpyrrolidinium chloride ([Py1,4]Cl/AlCl3) (40/60 mol%). The study comprises electrochemical experiments such as cyclic voltammetry, constant potential electrolysis, SEM and XRD measurements. Thick and uniform layers of aluminium are obtained from [Py1,4]Cl/AlCl3 with an average crystal size of 20 nm at 100 °C. Aluminium deposits obtained from 90:10 vol% and 80:20 vol% of [Py1,4]Cl/AlCl3 and [EMIm]Cl/AlCl3 are nanocrystalline at 100 °C. The presence of imidazolium cations seems to alter the electrode/electrolyte interface to some extent as nanocrystalline and microcrystalline aluminium deposits are obtained from the ionic liquid mixtures at compositions of 70:30 vol% of [Py1,4]Cl/AlCl3 and [EMIm]Cl/AlCl3 and below.
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