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The effects of partial substitution of Cr for Ni on the electrochemical properties of Mg1.75Al0.25Ni1-xCrx (0 <= x <= 0.3) electrode alloys
Wang, Mei-Han; Zhang, Yao; Zhang, Lian-Zhong; Sun, Li-Xian; Tan, Zhi-Cheng; Xu, Fen; Yuan, Hua-Tang; Zhang, Tao
关键词Mg-al-ni-cr Electrode Alloys Electrochemical Properties Solid Diffusion Method
刊名JOURNAL OF POWER SOURCES
2006-09-13
DOI10.1016/j.jpowsour.2006.04.016
159期:1页:159-162
收录类别ISTP ; SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
类目[WOS]Electrochemistry ; Energy & Fuels
研究领域[WOS]Electrochemistry ; Energy & Fuels
关键词[WOS]MG2NI ; TI
英文摘要In this paper, the substitution of different amounts of Cr for Ni in the hydrogen storage electrode alloy of Mg1.75Al0.25Ni has been carried out to form quaternary Mg1.75Al0.25Ni1-xCrx (0 <= x <= 0.3) alloys by means of solid diffusion method (DM). The XRD profiles exhibited that the quaternary alloys still kept the same main phase of Mg3AlNi2 (S.G. Fd3m) as that of ternary Mg1.75Al0.25Ni alloy. The electrochemical studies found that Cr substituted quaternary alloy reached its maximum discharge capacity (165 mAh g(-1)) after 2 cycles, which was larger than that of the Mg1.75Al0.25Ni alloy (154 mAh g(-1)). Among these quaternary alloys, the Mg1.75Al0.25Ni0.9Cr0.1 electrode alloy was found possessing the highest cycling capacity retention rate. Cyclic voltammetry (CV) results and anodic polarization curves demonstrated that appropriate content (x lower than 0.1) of Cr effectively improved the reaction activity of electrode and inhibited the cycling capacity degradation to some degree. Electrochemical impedance spectroscopy (EIS) analyses indicated that the increase of Cr content would raise the polarization resistance RP on the particle surface of these quaternary alloys. (c) 2006 Elsevier B.V. All rights reserved.
语种英语
WOS记录号WOS:000241012000030
引用统计
被引频次:14[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/140095
专题中国科学院大连化学物理研究所
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
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GB/T 7714
Wang, Mei-Han,Zhang, Yao,Zhang, Lian-Zhong,et al. The effects of partial substitution of Cr for Ni on the electrochemical properties of Mg1.75Al0.25Ni1-xCrx (0 <= x <= 0.3) electrode alloys[J]. JOURNAL OF POWER SOURCES,2006,159(1):159-162.
APA Wang, Mei-Han.,Zhang, Yao.,Zhang, Lian-Zhong.,Sun, Li-Xian.,Tan, Zhi-Cheng.,...&Zhang, Tao.(2006).The effects of partial substitution of Cr for Ni on the electrochemical properties of Mg1.75Al0.25Ni1-xCrx (0 <= x <= 0.3) electrode alloys.JOURNAL OF POWER SOURCES,159(1),159-162.
MLA Wang, Mei-Han,et al."The effects of partial substitution of Cr for Ni on the electrochemical properties of Mg1.75Al0.25Ni1-xCrx (0 <= x <= 0.3) electrode alloys".JOURNAL OF POWER SOURCES 159.1(2006):159-162.
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