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Citation: GAO Li-Xia, WANG Li-Na, QI Tao, LI Yu-Ping, CHU Jing-Long, QU Jing-Kui. Electrodeposition of Aluminium from AlCl₃/Et₃NHCl Ionic Liquids[J]. Acta Physico-Chimica Sinica, ;2008, 24(06): 939-944. doi: 10.1016/S1872-1508(08)60040-6 shu

Electrodeposition of Aluminium from AlCl₃/Et₃NHCl Ionic Liquids

1.
Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, P. R. China

Received Date: 21 January 2008
Available Online: 9 April 2008

Aluminum was successfully electrodeposited on Al electrodes from aluminum chloride (AlCl3)/triethylamine hydrochloride (Et3NHCl) ionic liquids by the constant potential electrolysis. Electrical conductivities of AlCl3/Et3NHCl ionic liquids were measured as a function of the temperature and composition. The nucleation processes and the influence of experimental conditions on the current efficiency and surface morphology of aluminum electrodeposits were studied on Al electrodes from 2:1 molar ratio AlCl3/Et3NHCl ionic liquid. The electrical conductivities of ionic liquids increased as the electrolyte temperature increased, following the Arrhenius behavior. Analyses of the chronoamperograms indicated that the deposition process of aluminium on Al substrates was controlled by instantaneous nucleation with diffusion-controlled growth. Constant potential deposition experiments showed that the electrodeposits obtained on Al electrodes were dense, continuous, and well adherent, and the current efficiency was 73% at -2.4 V ( vs Pt) for 20 min electrolysis at room temperature. The purity of aluminum electrodeposits on Al electrodes was above 96% (w).
- Aluminium,
- Electrodeposition,
- Electrochemistry,
- Ionic liquid
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沈阳化工大学材料科学与工程学院沈阳 110142

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Electrodeposition of Aluminium from AlCl3/Et3NHCl Ionic Liquids

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通讯作者: 陈斌, bchen63@163.com

Electrodeposition of Aluminium from AlCl₃/Et₃NHCl Ionic Liquids