Electrochemical performances of cobalt-free La0.7Mg0.3Ni3.5-x(MnAl2)(x) (x=0-0.20) hydrogen storage alloy electrodes
文献类型：期刊论文
| 作者 | Chu, Hailiang1,2; Zhang, Yao1; Qiu, Shujun1,2; Qi, Yanni1,2; Sun, Lixian1; Xu, Fen1; Wang, Qing3; Dong, Chuang3 |
| 刊名 | journal of alloys and compounds
 |
| 出版日期 | 2008-06-12 |
| 卷号 | 457期号:1-2页码:90-96 |
| 关键词 | electrode materials hydrogen storage alloys electrochemical properties partial substitution |
| 英文摘要 | cobalt-free ab(3)-type la0.7mg0.3ni3.5-x(mnal2), (x=0-0.20) nonstoichiometric alloys were synthesized and investigated for their electrochemical hydrogen storage properties. it was found that the maximum discharge capacity of la0.7mg0.3ni3.5-x(mnal2) (x = 0-0.20) alloy electrodes decreases from 362.7 mah/g (x = 0) to 293.9 mah/g (x = 0.20) with increasing x. the cyclic capacity retention rate c-100/c-max of alloy electrodes initially increases to 43.7% (x = 0.10) due to the formation of m-containing passive film, and subsequently decreases to 35.9% (x = 0.20) since the passive film is cracked. these phenomena are demonstrated by scanning electron microscopy (sem) images of alloy electrodes after 70 charge-discharge cycles. it was also revealed that the electrochemical reaction kinetics is retarded when x<0.10, which can be ascribed to the increase of charge-transfer resistance of the alloy electrodes due to the formation of al-containing passive film. when x > 0.10, the electrochemical kinetics is enhanced because of the crack of the al oxide film on the electrode surface resulting from the dissolution of mn into the alkaline electrolyte. the optimal content of mn and al in la0.7mg0.3ni3.5-x(mnal2)(x) alloys for negative electrodes in alkaline rechargeable secondary batteries is x = 0.10 in this study. (c) 2007 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] | metal hydride electrodes ; co content ; capacity ; substitution ; lamg2ni9 ; battery ; ni ; x=0.1-0.5 ; behavior ; phase |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000256124900022 |
| 公开日期 | 2015-11-17 |
| 源URL | [http://159.226.238.44/handle/321008/141118]  |
| 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.Chinese Acad Sci, Dalian Inst Chem Phys, Mat & Thermochem Lab, Dalian 116023, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China 3.Dalian Univ Technol, State Key Lab Mat Modificat, Dalian 116024, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chu, Hailiang,Zhang, Yao,Qiu, Shujun,et al. Electrochemical performances of cobalt-free La0.7Mg0.3Ni3.5-x(MnAl2)(x) (x=0-0.20) hydrogen storage alloy electrodes[J]. journal of alloys and compounds,2008,457(1-2):90-96. |
| APA | Chu, Hailiang.,Zhang, Yao.,Qiu, Shujun.,Qi, Yanni.,Sun, Lixian.,...&Dong, Chuang.(2008).Electrochemical performances of cobalt-free La0.7Mg0.3Ni3.5-x(MnAl2)(x) (x=0-0.20) hydrogen storage alloy electrodes.journal of alloys and compounds,457(1-2),90-96. |
| MLA | Chu, Hailiang,et al."Electrochemical performances of cobalt-free La0.7Mg0.3Ni3.5-x(MnAl2)(x) (x=0-0.20) hydrogen storage alloy electrodes".journal of alloys and compounds 457.1-2(2008):90-96. |
入库方式： OAI收割
来源：大连化学物理研究所
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