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化工学报  2013 

[BMIM]Cl/AlCl3离子液体低温电沉积铝过程

DOI: 10.3969/j.issn.0438-1157.2013.z1.022, PP. 147-154

Keywords: 离子液体,电化学,电解,

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Abstract:

采用玻碳/铂为惰性阳极,以1-丁基-3-甲基咪唑氯盐([BMIM]Cl/AlCl3)离子液体体系为电解液,研究了离子液体电解铝工艺,优化了电解工艺条件,探讨了电解影响因素。结果表明,当电解液[BMIM]Cl∶AlCl3摩尔比为1∶2.00时,随着温度的升高,铝的沉积槽电压逐渐减小,电流密度增加,但电解液的稳定性减弱,当温度达到90℃时,电解液分解明显。当电解温度一定时,随着[BMIM]Cl∶AlCl3摩尔比的增加[(1∶1.25)~(1∶2.00)],电流密度增加。通过赫尔槽实验,SEM、XRD分析了电解铝的沉积形貌和晶相结构。随电流密度的逐渐减小,沉积层变薄,晶相结构变化不大;相同电流密度区随温度的升高,沉积层逐渐变得粗糙。计算了不同槽间距下的槽压与电流密度的关系。

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