Al在室温离子液体BMIMHSO4中的电沉积-有色金属冶炼部分.DOC

[EMIM]HSO4离子液体的微波合成及铝电沉积应用 穆洁尘1，张丽鹏2，王恩琦3，吕迎智2 （1.山东理工大学 机械工程学院，山东淄博 255049； 2.万杰集团有限公司，山东淄博 255213；3.山东亚特尔集团股份有限公司，济南 250011） 摘要：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沉积层形貌进行表征，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4.81 V），适合作电解质；在电极上发生欠电位沉积和体相沉积；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。 关键词：[EMIM]HSO4；离子液体；微波合成；铝电沉积Microwave Synthesis of [EMIM]HSO4 Ionic Liquids and Its Aluminum Electrodeposition Application MU Jie-chen1, ZHANG Li-peng2, WANG En-qi3, LV Ying-zhi2 (1. School of Chemical Engineering, Shandong University of Technology, Zibo 255049, Shandong, China; 2. Wanjie Group Co., Ltd, Zibo 255213, Shandong, China; 3. Shandong Yateer Group Co., Ltd, Jinan 250011, China) Abstract: 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. Key words: [EMIM]HSO4; ionic liquids; microwave synthesis;? aluminum electrodeposition; application 离子液体(Room Temperature Ionic Liquids)是由有机阳离子和无机或有机阴离子构成的大多数在室温下呈液态的离子化合物具有良好的化学和热稳定性以及较宽的电化学窗口高的导电性低的挥发性等优良性质，广泛应用于电化学、有机合成、分离萃取、材料制备等领域[-7]。1-乙基-3-甲基咪唑类离子液体的研究受到人们的广泛关注[]。杨家振[10]等制备了1-甲基-3-丁基咪唑四氟硼酸盐(BMIBF4)室温离子液体，研究BMIAlCl4的热力学性质及下FeCl3在BMIBF4中的电化学性质，估算了Fe3+的扩散系数。马江华[1]等制