Electrodeposition of nano- and microcrystalline aluminium in three different air and water stable ionic liquids
Electrodeposition of nano- and microcrystalline aluminium in three different air and water stable ionic liquids
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DOI：
10.1002/cphc.200600095
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发表时间：
2006-07-17
期刊：
影响因子：
2.9
通讯作者：
Endres, F.
中科院分区：
文献类型：
--
作者：
El Abedin, S. Zein;Moustafa, E. M.;Endres, F.
本工作首次对铝在三种不同的水和空气稳定的离子液体中的电沉积进行了比较实验研究，即1丁基-1-甲基-吡咯烷鎓-双(三氟甲基磺酰基)亚胺([EMIm] Tf2N)和三己基-十四烷基-鏻双(三氟甲基磺酰基)-酰亚胺(P-14,P-6,P-6,P-6) Tf2N）。离子液体[BMP]Tf2N和[EMIm]Tf2N分别在AlCl3浓度范围为1.6至2.5 mol/L-1时表现出双相行为。双相混合物在温度≥80℃时变成单相。发现纳米晶铝可以在AlCl3饱和的离子液体[BMP]Tf2N中电沉积。获得的沉积物通常是均匀的、致密的、有光泽的并且粘附有纳米尺寸范围内的非常细的微晶。然而，在离子液体[EMIm]Tf2N中获得了微米范围内的粗立方形铝颗粒。在这种液体中，颗粒尺寸随着温度升高而显着增加。在室温下，在离子液体[三己基-四-癸基-鏻]Tf2N中获得了非常薄的、镜状的铝膜，其中含有约20 nm的非常细的微晶。 150 摄氏度时，平均晶粒尺寸为 35 nm。
The present work shows, for the first time, a comparative experimental study on the electrodeposition of aluminium in three different water and air stable ionic liquids, namely 1 butyl-1-methyl-pyrrolidinium-bis(trifluoromethylsulfonyl)imide ([EMIm] Tf2N), and trihexy-tetradecyl-phosphoniumbis (trifluoromethylsulfonyl)-imide (P-14,P-6,P-6,P-6 Tf2N). The ionic liquids [BMP]Tf2N and [EMIm]Tf2N show biphasic behaviour in the AlCl3 concentration range from 1.6 to 2.5 mol/L-1, respectively. The biphasic mixtures become monophasic at temperatures >= 80 degrees C. It was found that nanocrystalline aluminum can be electrodeposited in the ionic liquid [BMP]Tf2N saturated with AlCl3. The deposits obtained are generally uniform, dense, shining, and adherent with very fine crystallites in the nanometer size regime. However, coarse cubic-shaped aluminium particles in the micrometer range are obtained in the ionic liquid [EMIm]Tf2N. In this liquid the particle size significantly increases as the temperature rises. A very thin, mirrorlike aluminium film containing very fine crystallites of about 20 nm is obtained in the ionic liquid [trihexyl-tetra-decyl-phosphonium] Tf2N at room temperature. At 150 degrees C average grain size is found to be 35 nm.