Electrochemical impedance study of discharge characteristics of Pd substituted MgNi-based hydrogen storage electrode alloys
文献类型：期刊论文
| 作者 | Tian, Qifeng1,2,4; Zhang, Yao3; Chu, Hailiang3; Ding, Yigang1,2; Wu, Yuanxin1,2 |
| 刊名 | journal of alloys and compounds
 |
| 出版日期 | 2009-07-29 |
| 卷号 | 481期号:1-2页码:826-829 |
| 关键词 | Hydrogen storage alloys Electrochemical impedance Charge-transfer resistance Warburg coefficient |
| 产权排序 | 1;2 |
| 通讯作者 | 田琦峰 ; 张耀 |
| 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. |
| 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 |
| 关键词[WOS] | ni powders ; ti ; behavior ; ternary ; al ; performances ; spectroscopy ; batteries ; compound ; hydrides |
| 收录类别 | SCI |
| 原文出处 | false |
| 语种 | 英语 |
| WOS记录号 | WOS:000267798700162 |
| 公开日期 | 2010-11-30 |
| 源URL | [http://159.226.238.44/handle/321008/101831]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 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 |
| 推荐引用方式 GB/T 7714 | 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. |
| APA | Tian, Qifeng,Zhang, Yao,Chu, Hailiang,Ding, Yigang,&Wu, Yuanxin.(2009).Electrochemical impedance study of discharge characteristics of Pd substituted MgNi-based hydrogen storage electrode alloys.journal of alloys and compounds,481(1-2),826-829. |
| MLA | Tian, Qifeng,et al."Electrochemical impedance study of discharge characteristics of Pd substituted MgNi-based hydrogen storage electrode alloys".journal of alloys and compounds 481.1-2(2009):826-829. |
入库方式： OAI收割
来源：大连化学物理研究所
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