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题名: Effects of partial substitution by Fe and Co for Ni in the Mg1.75Al0.25Ni electrode alloy on their electrochemical performances
作者: Wang, MH;  Zhang, LZ;  Zhang, Y;  Sun, LX;  Tan, ZC;  Xu, F;  Yuan, HT;  Zhang, T
关键词: Mg-based electrode alloys ;  electrochemical performances ;  solid diffusion method
刊名: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
发表日期: 2006-05-01
DOI: 10.1016/j.ijhydene.2005.06.017
卷: 31, 期:6, 页:775-779
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Electrochemistry ;  Energy & Fuels
研究领域[WOS]: Chemistry ;  Electrochemistry ;  Energy & Fuels
英文摘要: In this paper, Co and Fe were selected as the partial substitution elements for Ni to form Mg1.75Al0.25Ni0.9X0.1 quaternary electrode alloys prepared by means of solid diffusion method (DM) on the basis of the ternary Mg1.75Al0.25Ni alloy. The XRD patterns exhibited that quaternary alloys still possessed the main phase Of Mg3AlNi2 as that of the ternary Mg1.75Al0.25Ni alloy when introducing the substitution elements Co or Fe. The electrochemical studies found that Fe- or Co-substituted quaternary alloy possessed larger discharge capacity and higher cycling stability than the Mg1.75Al0.25Ni ternary alloy. Cyclic voltammetry (CV) tests demonstrated that the additional Fe and Co could improve the electrocatalytic oxidation activity on the surface and also the discharge capacity of the Mg1.75Al0.25Ni electrode alloy. Anodic polarization curves indicated that the additional Fe and Co led to potentials shifting toward position direction and decrease of the corrosion current. Electrochemical impedance spectroscopy (EIS) revealed that the exchange current density decreases considerably with the augmentation of the cycle number. (c) 2005 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.
关键词[WOS]: MG2NI ALLOY ;  TI
语种: 英语
WOS记录号: WOS:000237277000013
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/140057
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Mat & Thermochem Lab, Dalian 116023, Peoples R China
2.Nankai Univ, Inst New Energy Mat Chem, Tianjin 300071, Peoples R China

Recommended Citation:
Wang, MH,Zhang, LZ,Zhang, Y,et al. Effects of partial substitution by Fe and Co for Ni in the Mg1.75Al0.25Ni electrode alloy on their electrochemical performances[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2006,31(6):775-779.
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