BMIC-AlCl_3离子液体的电化学性能

Electrochemical Properties of BMIC-AlCl_3 Ionic Liquids

研究了酸性BMIC-xAlCl3(氯化-1-丁基-3-甲基咪唑-AlCl3)离子液体的电化学性能。结果表明,x(AlCl3)(AlCl3的摩尔分数)对离子液体的电化学性能有着较大的影响。当0.5<x(AlCl3)<0.667时,随着x(AlCl3)的增大,离子液体电导率升高,阴极电流密度增大,阴极电流效率增大;但当x(AlCl3)>0.667时,随着x(AlCl3)进一步增大,电导率开始下降,阴极电流密度减小,阴极电流效率减小。沉积层随着x(AlCl3)的增大变得平整致密。此外,红外光谱研究发现,随着x(AlCl3)的增大,AlCl4-的吸收峰逐渐减弱,Al2Cl-7的吸收峰增强,但当x(AlCl3)>0.667时,Al2Cl-7的吸收峰又稍有减弱。

Acidic BMIC-xAlCl3（1-butyl-3-methyl imidazolium chloride-AlCl3） ionic liquids were studied in terms of their electrochemical properties.The results show that x（AlCl3）（molar fraction of AlCl3） has great effects on the electrochemical properties of ionic liquids.The conductivity,cathode current density and current efficiency of ionic liquids increase with x（AlCl3） until x（AlCl3） reaches 〉0.667.However,the effect of x（AlCl3） on the conductivity,cathode current density and current efficiency are negligible as x（AlCl3）0.667.The electrodeposition becomes smoother and more compact with increasing x（AlCl3）.In addition,infrared spectrum indicated that the absorption peaks of AlCl-4 weaken,and the absorption peaks of Al2Cl-7enhance with increasing x（AlCl3） as x（AlCl3）〈0.667,but they turn to be slightly weak when x（AlCl3） 0.667.