(昆明理工大學(xué) 冶金與能源工程學(xué)院，昆明 650093)
摘 要: 采用循環(huán)伏安和線性掃描伏安法研究水對(duì)摩爾比為2:1的AlCl3-BMIC離子液體電化學(xué)性質(zhì)的影響。結(jié)果表明：隨著含水量的增加，鋁的還原峰電流密度減小，陰極和陽(yáng)極極化過(guò)電位增加，槽電壓不斷升高。當(dāng)離子液體含水量低于1.39 mol/L時(shí)，電流效率穩(wěn)定在94%~95%；繼續(xù)增加含水量到1.67 mol/L時(shí)，電流效率從94%下降到64.7%。當(dāng)離子液體含水量低于1.39 mol/L時(shí)，沉積層變得更致密；當(dāng)含水量增加到1.67 mol/L時(shí)，沉積層變得疏松。離子液體含水量為1.39 mol/L時(shí)，鋁的純度超過(guò)99.9%。
關(guān)鍵字: 水；離子液體；電沉積；鋁
（Faculty of Metallurgical and Energy Engineering, Kunming University of science and Technology,
Kunming 650093, China）
Abstract:The effect of water on electrochemical characteristics of AlCl3-BMIC ionic liquid with molar ratio of 2:1 was investigated by cyclic voltammetry and linear sweep voltammetry. The results show that the cathodic peak current density decreases, the overpotential values of cathode and anode increase and the cell voltage increases with water concentration increasing in the ionic liquid. Furthermore, the cell voltage, current efficiency and surface morphology of aluminum electrodeposits are affected by amount of water in ionic liquid. The current efficiency is various in the range from 94% to 95% when the water concentration is below 1.39 mol/L, while it decreases sharply from 94% to 64.7% when the water concentration is increased to 1.67 mol/L. The deposit layer becomes more compact when the water concentration of ionic liquid is below 1.39 mol/L, but it becomes loosen when the water concentration is increased to 1.67 mol/L. The purity of aluminum deposit is over 99.9% when the water concentration is 1.39 mol/L.
Key words: water; ionic liquid; electrodeposition; aluminum
