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Effect of substituting Mn for Ni on the hydrogen storage and electrochemical properties of ReNi2.6-xMnxCo0.9 alloys
Jiang, Long1,2; Li, Guangxu1; Xu, Liqin1; Jiang, Weiqing1; Lan, Zhiqiang1; Guo, Jin1,3
Corresponding AuthorGuo, Jin(guojin@gxu.edu.cn)
2010
Source PublicationINTERNATIONAL JOURNAL OF HYDROGEN ENERGY
ISSN0360-3199
Volume35Issue:1Pages:204-209
AbstractReNi2.6-xMnxCo0.9 (x = 0.0, 0.225, 0.45, 0.675, 0.90) alloys were prepared by induction melting. The effects of partially substituting Mn for Ni on the phase structure and electrochemical properties of the alloys were investigated systematically. In the alloys, (La, Ce)(2)Ni-7 phase with a Ce2Ni7-type structure, (Pr, Ce)Co-3 phase with a PuNi3-type structure, and (La, Pr)Ni-5 phase with a CaCu5-type structure were the main phases. The (La,Pr)Ni phase appeared when x increased to 0.45, and the (La, Pr)Ni-5 phase disappeared with further increasing x (x > 0.45). The hydrogen-storage capacity of the ReNi2.6-xMnxCo0.9 (x = 0.0, 0.225, 0.45, 0.675, 0.90) alloys initially increased and reached a maximum when Mn content was x = OAS, and then decreased with further increasing Mn content. The ReNi2.6-xMnxCo0.9 (x = 0.0, 0.225, 0.45, 0.675, 0.90) alloy exhibited a hydrogen- storage capacity of 0.81, 0.98, 1.04, 0.83 and 0.53 wt.%, respectively. Electrochemical studies showed that the maximum discharge capacity of the alloy electrodes initially increased from 205 mAh/g (x 0.0) to 352 mAh/g (x = 0.45) and then decreased to 307 mAh/g (x = 90). The hydrogen absorption rate first increased and then decreased with addition of Mn element. The ReNi2.15Mn0.45Co0.9 alloy showed faster hydrogen absorption kinetics than that of the other alloys. The presence of Mn element slowed hydrogen desorption kinetics. (C) 2009 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
KeywordHydrogen storage alloy Hydrogen storage property Electrochemical characteristic
Funding OrganizationNational Natural Science Foundation of China ; Natural Science Foundation of Guangxi ; Guangxi University Key Program for Science and Technology Research
DOI10.1016/j.ijhydene.2009.10.041
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[50561002] ; National Natural Science Foundation of China[50861003] ; Natural Science Foundation of Guangxi[0728028] ; Guangxi University Key Program for Science and Technology Research[2004ZD04]
WOS Research AreaChemistry ; Electrochemistry ; Energy & Fuels
WOS SubjectChemistry, Physical ; Electrochemistry ; Energy & Fuels
WOS IDWOS:000274079200024
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Cited Times:22[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/101936
Collection中国科学院金属研究所
Corresponding AuthorGuo, Jin
Affiliation1.Guangxi Univ, Coll Phys Sci & Technol, Nanning 530004, Peoples R China
2.Yangtze Univ, Sch Phys Sci & Technol, Jinzhou 434023, Peoples R China
3.Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Jiang, Long,Li, Guangxu,Xu, Liqin,et al. Effect of substituting Mn for Ni on the hydrogen storage and electrochemical properties of ReNi2.6-xMnxCo0.9 alloys[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2010,35(1):204-209.
APA Jiang, Long,Li, Guangxu,Xu, Liqin,Jiang, Weiqing,Lan, Zhiqiang,&Guo, Jin.(2010).Effect of substituting Mn for Ni on the hydrogen storage and electrochemical properties of ReNi2.6-xMnxCo0.9 alloys.INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,35(1),204-209.
MLA Jiang, Long,et al."Effect of substituting Mn for Ni on the hydrogen storage and electrochemical properties of ReNi2.6-xMnxCo0.9 alloys".INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 35.1(2010):204-209.
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