Effect of Al content on the electrochemical properties of Mg(2-x)Al(x)Ni thin film hydride electrodes

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	Effect of Al content on the electrochemical properties of Mg(2-x)Al(x)Ni thin film hydride electrodes
	J. L. Xu; Y. Li; F. H. Wang
	2009
发表期刊	Electrochimica Acta
ISSN	0013-4686
卷号	55 期号:1 页码:148-154
摘要	Thin films of Mg(2-x)Al(x)Ni alloys have been prepared by magnetron sputtering, and the effects of partial substitution of Al for Mg on the electrochemical properties of the films were studied. EIS results indicate the rate-limiting process for the thin film hydride electrode is the charge transfer reaction during the process of total discharge. A theoretical model has been derived for the impedance of a thin film hydride electrode based upon the assumption that hydrogen diffusion is neglected in the electrode. The charge-transfer reaction rate at the electrode surface and hydrogen diffusivity in the Mg(2-x)Al(x)Ni thin film hydride electrodes were observed to initially decrease then increase with increasing Al content. Results from capacitance measurements indicate n-type semiconductor properties for the corrosion layer during the charge-discharge process. Hydrogen atom and OH(-) transfer became more difficult with increasing Al content until x=0.3, after which a significant drop in the barrier resistance was observed. (C) 2009 Elsevier Ltd. All rights reserved.
部门归属	[li, ying; wang, fuhui] chinese acad sci, state key lab corros & protect, inst met res, shenyang 110016, liaoning, peoples r china. [xu, junli] northeastern univ, coll sci, shenyang 110004, liaoning, peoples r china.;li, y (reprint author), chinese acad sci, state key lab corros & protect, inst met res, shenyang 110016, liaoning, peoples r china;liying@imr.ac.cn
关键词	Thin Film Partial Substitution Faradic Admittance Hydrogen Diffusivity Electronic Properties Hydrogen Storage Properties Mg2ni Alloy Impedance Substitution Batteries Behavior Model
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/32458
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. L. Xu,Y. Li,F. H. Wang. Effect of Al content on the electrochemical properties of Mg(2-x)Al(x)Ni thin film hydride electrodes[J]. Electrochimica Acta,2009,55(1):148-154.
APA	J. L. Xu,Y. Li,&F. H. Wang.(2009).Effect of Al content on the electrochemical properties of Mg(2-x)Al(x)Ni thin film hydride electrodes.Electrochimica Acta,55(1),148-154.
MLA	J. L. Xu,et al."Effect of Al content on the electrochemical properties of Mg(2-x)Al(x)Ni thin film hydride electrodes".Electrochimica Acta 55.1(2009):148-154.