Electrodeposition of Niobium from 1-Butyl-1-Methylpyrrolidinium bis(trifluoromethylsulfonyl)amide Ionic Liquid
Electrodeposition of Niobium from 1-Butyl-1-Methylpyrrolidinium bis(trifluoromethylsulfonyl)amide Ionic Liquid
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DOI：
10.1016/j.electacta.2014.02.099
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发表时间：
2014-05
影响因子：
6.6
通讯作者：
P. Giridhar;S. Abedin;A. Bund;A. Ispas;F. Endres
中科院分区：
文献类型：
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作者：
P. Giridhar;S. Abedin;A. Bund;A. Ispas;F. Endres
研究了离子液体1-丁基-1-甲基吡咯烷胺([PY1，4]TFSA)在不同温度(RT~170℃)下电沉积Nb的情况，并研究了LiF和LiTFSA等盐的添加对Nb沉积质量的影响。用循环伏安法研究了NbF5单独在[Py1，4]TFSA中的电化学行为，以及NbF5与LiF(或NbF5与LiTFSA)的混合物在[Py1，4]TFSA中的电化学行为。采用恒电位电解法沉积Nb。用扫描电子显微镜和X射线衍射仪对所获得的Nb镀层进行了表征。结果表明，在NbF5/[Py，4]TFSA体系中，Nb可以与非化学计量比的Nb亚氟化物化合物一起电沉积。(NbF5+LiTFSA)/[PY1，4]TFSA Nb沉积的扫描电子显微镜分析表明，Nb沉积为立方晶面。对(NbF5+LiTFSA)/[Py 1，4]TFSA和(NbF5+LiF)/[Py 1，4]TFSA在170℃时的掠射角X射线衍射分析证明，除Nb的氧化物外，还存在元素Nb。在NbF5/[Py1，4]TFSA中添加LiF或LiTFSA均显著提高了Nb沉积的质量。
Electrodeposition of Niobium from the ionic liquid 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)amide ([Py1,4]TFSA) was investigated at various temperatures ranging from RT to 170 °C. The effect of addition of salts such as LiF and LiTFSA on the quality of the Nb deposits was also investigated. Cyclic voltammetry was employed to examine the electrochemical behaviour of NbF5alone in [Py1,4]TFSA and of mixtures of NbF5with LiF (or NbF5with LiTFSA) in [Py1,4]TFSA. Potentiostatic electrolysis was performed to deposit Nb. The obtained Nb deposits were characterized using SEM and XRD. The results show that Nb can be electrodeposited along with nonstoichiometric compounds of niobium subfluorides from NbF5/[Py1,4]TFSA. Cubic facets were seen in the SEM analysis of the Nb deposit from (NbF5+ LiTFSA)/[Py1,4]TFSA. Glancing Angle XRD analysis of the deposits obtained from (NbF5+ LiTFSA)/[Py1,4]TFSA and (NbF5+ LiF)/[Py1,4]TFSA at 170 °C proved the existence of elemental Nb in addition to oxides of Nb. The addition of either LiF or LiTFSA to NbF5/[Py1,4]TFSA significantly enhanced the quality of the Nb deposits.