Effects of temperature and current density on zinc electrodeposition from acidic sulfate electrolyte with [BMIM]HSO4 as additive

被引:51
作者
Zhang, Qi Bo [1 ]
Hua, Yi Xin [1 ]
Dong, Tie Guang [1 ]
Zhou, Dan Gui [1 ]
机构
[1] Kunming Univ Sci & Technol, Fac Mat & Met Engn, Kunming 650093, Peoples R China
基金
中国国家自然科学基金;
关键词
Temperature; Current density; Additives; Zinc deposition; Ionic liquids; IONIC LIQUIDS; IMPURITIES; COPPER; ELECTROCRYSTALLIZATION; SURFACTANTS; ANTIMONY; CHLORIDE; GROWTH; GLUE;
D O I
10.1007/s10800-009-9786-5
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
The effects of temperature and current density on cathodic current efficiency, specific energy consumption, and zinc deposit morphology during zinc electrodeposition from sulfate electrolyte in the presence of 1-butyl-3-methylimidazolium hydrogen sulfate ([BMIM]HSO4) as additive were investigated. The highest current efficiency (93.7%) and lowest specific energy consumption (2,486 kWh t(-1)) were achieved at 400 A m(-2) and 313 K with addition of 5 mg dm(-3) [BMIM]HSO4. In addition, the temperature dependence of some kinetic parameters for the zinc electrodeposition reaction was experimentally determined. Potentiodynamic polarization sweeps were carried out to obtain the expression for each parameter as a function of temperature. In the condition studied, the exchange current density depended on temperature as ln(i (0)) = -a/T + b and the charge transfer coefficient was constant. Moreover, the adsorption of the additive on cathodic surface obeyed the Langmuir adsorption isotherm. The associated thermodynamic parameters indicated the adsorption to be chemical.
引用
收藏
页码:1207 / 1216
页数:10
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