离子液体AlCl<sub>3</sub>-[bmim]Cl中电沉积铝的研究

中国腐蚀与防护学报

2011, Vol. 31

Issue (4): 319-328

研究报告

本期目录 | 过刊浏览

离子液体AlCl₃-[bmim]Cl中电沉积铝的研究

梅天庆,鱼光楠,贺利敏,裴玉汝

南京航空航天大学材料科学与技术学院南京 210016

ELECTRODEPOSITION OF ALUMINUM FROM\par AlCl₃-[bmim]Cl IONIC LIQUIDS

MEI Tianqing, YU Guangnan, HE Limin, PEI Yuru

College of Materials Science and Technology, Nanjing University of Aeronautics & Astronautics, Nanjing 210016

全文: PDF(1393 KB)

摘要: 在摩尔比为2:1的AlCl₃-[bmim]Cl离子液体中，加入一定量的甲苯，控制阴极电流密度，在基体铁片上获得银白色和平整致密的铝镀层。循环伏安实验表明离子液体中沉积铝源于Al₂Cl₇^- 的还原，还原峰电位为-0.34 V；当电流密度为20 mA/cm²时，最大电流效率达97%；所得铝镀层的厚度与电镀时间呈抛物线关系；在电流密度小于 35 mA/cm²时，镀层厚度随电流密度增大呈逐渐递增趋势；扫描电镜、X射线能谱对铝镀层分析结果表明(45±2)℃ 温度得到平整致密纯度高的铝镀层；当电流密度为 20 mA/cm²时，铝镀层呈薄片状生长，随电流密度的增大，镀铝层形貌由片状向粒状过渡，并伴随着晶粒的细化。

关键词 ：电沉积, 离子液体, 铝, 镀层厚度, 电流密度

Abstract：Dense, well adherent and silvery bright aluminum coating was obtained on iron substrates from 2AlCl₃/[bmim]Cl ionic liquids contained of a small amount of toluene at various cathode current densities. Cyclic voltammogram show that the deposition is obtained owing to the reduction of Al₂Cl₇^- which has a peak value of -0.34 V; The maximal current efficiency of 97% is obtained when current density is 20 mA/cm². The thickness of aluminum coating increases with prolongation of plating time and the increase of cathode current density when it is less than 35 mA/cm². The results investigated by SEM and DES show that the aluminum electrodeposits obtained on Fe electrodes were dense, continuous and higher purity at 45±2℃ temperature. When the current density is 20 mA/cm², the aluminum is deposited in a flaky form, with the increasing of the current density, the form of the aluminum layer changes from flake to graininess, and at the same time, the size of the grains decreases.

Key words： electrodeposition ionic liquid aluminum thickness current density

收稿日期: 2010-07-01

ZTFLH:

TQ153.1

通讯作者: 梅天庆 E-mail: meitq@nuaa.edu.cn

Corresponding author: MEI Tianqing E-mail: meitq@nuaa.edu.cn

作者简介: 梅天庆，男，1954年生，副教授，研究方向为化学电源电极材料和金属电沉积

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引用本文:

梅天庆,鱼光楠,贺利敏,裴玉汝. 离子液体AlCl₃-[bmim]Cl中电沉积铝的研究[J]. 中国腐蚀与防护学报, 2011, 31(4): 319-328.
YU Guang-Nan. ELECTRODEPOSITION OF ALUMINUM FROM\par AlCl₃-[bmim]Cl IONIC LIQUIDS. J Chin Soc Corr Pro, 2011, 31(4): 319-328.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2011/V31/I4/319

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