[EMIM]HSO4离子液体的微波合成及铝电沉积应用

对采用微波合成方法制备的EMIM]HSO4离子液体的物化性能进行测试,并将其作为电解质应用于铝的电沉积,用SEM、XRD及EDS对沉积层的形貌进行表征,通过测定循环伏安曲线以及计时电流曲线探讨铝在EMIM]HSO4中的电沉积机理。结果表明,EMIM]HSO4的电化学窗口较宽(4.81V),适合作电解质;铝在铜电极上发生欠电位沉积和体相沉积;铝的形核模式介于三维瞬时形核和连续成核之间;铝沉积层晶粒致密均匀,附着力好。

Microwave Synthesis of [EMIM]HSO4 Ionic Liquids and Its Aluminum Electrodeposition Application

The physical and chemical characteristics of microwave assisted synthesized 1-ethyl-3-methylimidazolium hydrogen sulfate EMIM]HSO4 ionic liquid were tested, and EMIM]HSO4 was applied to aluminum electrodeposition. The morphology of electrodeposits was characterized by SEM, XRD and EDS, respectively. Electrochemical techniques of cyclicvoltammetry and chronoamperometry were applied to investigate the mechanism of aluminum electrodeposition from the EMIM]HSO4 ionic liquid. The results show that EMIM]HSO4 has a wider electrochemical window (4.81 V) on platinum electrode, which could be used as electrolyte. The deposition process of aluminum on copper substrates is underpotential deposition and bulk deposition. The electrodeposition of aluminum proceeds is an uncertain three-dimensional nucleation model. The morphology of electrodeposits is dense, uniform and well adherent.