中国科学院大连化学物理研究所机构知识库
Advanced  
DICP OpenIR  > 中国科学院大连化学物理研究所  > 期刊论文
题名: Electrochemical impedance study of discharge characteristics of Pd substituted MgNi-based hydrogen storage electrode alloys
作者: Tian, Qifeng1, 2, 4;  Zhang, Yao3;  Chu, Hailiang3;  Ding, Yigang1, 2;  Wu, Yuanxin1, 2
通讯作者: 田琦峰 ;  张耀
关键词: Hydrogen storage alloys ;  Electrochemical impedance ;  Charge-transfer resistance ;  Warburg coefficient
刊名: JOURNAL OF ALLOYS AND COMPOUNDS
发表日期: 2009-07-29
DOI: 10.1016/j.jallcom.2009.03.116
卷: 481, 期:1-2, 页:826-829
收录类别: SCI
文章类型: Article
部门归属: 15
项目归属: 1504
产权排名: 1;2
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Materials Science, Multidisciplinary ;  Metallurgy & Metallurgical Engineering
研究领域[WOS]: Chemistry ;  Materials Science ;  Metallurgy & Metallurgical Engineering
英文摘要: Quaternary Pd substituted MgNi-based hydrogen storage alloys Mg(0.9-x)Ti(0.1)Pd(x)Ni (x=0.04, 0.06, 0.08, 0.1) in amorphous phase were prepared by mechanical alloying (MA). They exhibited enhanced cycle life in our previous studies. However, their electrochemical impedances and its relationship with electrode reaction kinetics are still unclear. In this work, the impedance spectra of the above electrode alloys were measured at different depths of discharge (DODs). The observed spectra were fit well with the equivalent circuit model used in the paper. We further observed that the rate-determining step changed from charge-transfer to hydrogen diffusion with proceeding of discharge according to the fitting analyses of spectra. The fitted results demonstrated that charge-transfer resistance R(ct) decreased and then increased with the depth of discharge (DOD) and it also increased with Pd content among the studied alloys. Thickness of surface passive film, which is proportional to the reciprocal of double layer capacitance near the electrode alloy surface according to Badawy et al., increased with the DOD and especially with Pd content in the alloys. Meanwhile, the thickened film on the surface of electrode alloys ensured its long cycle life. Through Randles plotting and comparing the variation of Warburg coefficient sigma vs. DOD for the electrode alloys. it was found that sigma increased with the DOD and substitution of Pd also improved the diffusion performance of the studied electrode alloys. Crown Copyright (C) 2009 Published by Elsevier B.V. All rights reserved.
关键词[WOS]: NI POWDERS ;  TI ;  BEHAVIOR ;  TERNARY ;  AL ;  PERFORMANCES ;  SPECTROSCOPY ;  BATTERIES ;  COMPOUND ;  HYDRIDES
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000267798700162
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/101831
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

Files in This Item:

There are no files associated with this item.


作者单位: 1.Wuhan Inst Technol, Minist Educ, Key Lab Green Chem Proc, Wuhan 430073, Peoples R China
2.Wuhan Inst Technol, Hubei Key Lab Novel Reactor & Green Chem Technol, Wuhan 430073, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
4.Dalhousie Univ, Dept Phys & Atmospher Sci, Halifax, NS B3H 3J5, Canada

Recommended Citation:
Tian, Qifeng,Zhang, Yao,Chu, Hailiang,et al. Electrochemical impedance study of discharge characteristics of Pd substituted MgNi-based hydrogen storage electrode alloys[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2009,481(1-2):826-829.
Service
 Recommend this item
 Sava as my favorate item
 Show this item's statistics
 Export Endnote File
Google Scholar
 Similar articles in Google Scholar
 [Tian, Qifeng]'s Articles
 [Zhang, Yao]'s Articles
 [Chu, Hailiang]'s Articles
CSDL cross search
 Similar articles in CSDL Cross Search
 [Tian, Qifeng]‘s Articles
 [Zhang, Yao]‘s Articles
 [Chu, Hailiang]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
  Add to CiteULike  Add to Connotea  Add to Del.icio.us  Add to Digg  Add to Reddit 
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Powered by CSpace