Abstract
Electrodeposition of aluminum on metal at low temperatures, with the participation of the ionic liquid electrolyte will contribute to solving many technical issues in critical industries such as automobiles, aircraft, electronics ... the industry uses aluminum and aluminum coated materials most.Using ionic liquids based on choline chloride and urea to electrodeposition of aluminum is more published in scientific journals in the world. In this article, we present the preliminary results of electrodeposition of aluminum on cathodes as copper, iron and especially glassy carbon. The nature of electrolytes based on choline chloride and urea were analyzed and identified. The solubility of aluminum chloride in this mixture also surveyed. The results showed that only choline chloride mixture / urea with a mole ratio of 1:1 solution is to create transparent and recrystallized at room temperature. The nature of electrolytes based on choline chloride and urea were analyzed and identified. The solubility of aluminum chloride in this mixture also surveyed. The results showed that only choline chloride mixture / urea with a mole ratio of 1:1 solution is to create transparent and recrystallized at room temperature. Solubility of aluminum chloride in this system is 5% by weight. So in the study of aluminum deposited on the cathode, we use only liquid choline chloride / urea / AlCl3 at the rate of 1 mol / 1 mol + 5% by weight of AlCl3. The electroplating are made with temperatures from 90-120 ° C, the time is 2 hours. Distance between two poles is 2 cm, the maximum of surface area 3 cm2 voltage between the two poles from 1-3 V and amperage stable at 100 - 150 mA. Nitrogen environment are set to limit the influence of oxygen and hydrogen. The results of the analysis on the cathode structure of aluminum films by XRD, SEM, XRF, EDS ... showed similarities with the aluminum anode. The purity of the aluminum film obtained depending on the materials used as the cathode. The purity of aluminum on the GC-cathode is 92.42 % atom, on iron is 70.33 % atom and on copper is 82.63 % atom.
Highlights
Research using ionic liquids for electrodepositing of aluminum was Hurley FH and Wier TP, published in 1951 [Hurley F
Electrodeposition of aluminum on metal at low temperatures, with the participation of the ionic liquid electrolyte will contribute to solving many technical issues in critical industries such as automobiles, aircraft, electronics ... the industry uses aluminum and aluminum coated materials most.Using ionic liquids based on choline chloride and urea to electrodeposition of aluminum is more published in scientific journals in the world
The results showed that only choline chloride mixture / urea with a mole ratio of 1:1 solution is to create transparent and recrystallized at room temperature
Summary
Research using ionic liquids for electrodepositing of aluminum was Hurley FH and Wier TP, published in 1951 [Hurley F. The authors have proposed the use of low-temperature molten salt, formed by the combination of aluminum chloride anhydrous salt with organic compounds such as 1-ethyl-3-methylimidazolium chloride [EMim]Cl as the electrolyte for aluminum electroplating process at low temperatures. Ionic liquids based on AlCl3, can be considered as the first generation of ionic liquids. The ionic liquid has the advantage over the previous generation using ionic liquids as Tetrafluoroborate anion [BF4] ̄ or hexafluorophotphat [PF6] ̄ hydrophobic by nature and their stability. During electrodeposion do not appear toxic HF gas for environmental
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