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Effects of absorption/desorption cycles on hydrogen storage properties of V and V0.9Cr0.1 alloy
Deng Xiaoxia; Cheng Honghui; Li Shenlan; Lue Manqi; Chen Demin; Yang Ke
Corresponding AuthorChen Demin(demin.chen.1@imr.ac.cn)
2007-09-01
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume43Issue:9Pages:977-982
AbstractThrough mechanical alloying treatment for V and V0.9Cr0.1 alloy with small amount of LaNi5, the activation properties of the both materials were improved. After more than 100 absorption/desorption cycles followed by thorough desorption, both V and V0.9Cr0.1 still maintained the single bcc structure. During the cycling the absorption plateau pressures of V increased, the absorption capacities decreased under the same hydrogen pressure and the absorption kinetics declined, which could be attributed to the relaxation of the internal strain introduced by ball milling and the contraction of the cell volumes. SEM observation revealed that with increasing cycle, a large amount of deep cracks formed on the surface and in the inner of the samples, which are beneficial to the enhancement of the hydrogen desorption plateau pressures and the improvement of the desorption kinetics. V showed greater degradation rate of effective hydrogen desorption capacity than V0.9Cr0.1 because of more decreases of the lattice strain and bcc cell volumes of V than those of V0.9Cr0.1, which induced more sever decrease of absorption capacity of V after absorption/desorption cycle.
KeywordV V-Cr alloy mechanical alloying hydrogen absorption/desorption property kinetics unit cell volumes lattice strain
Indexed BySCI
Language英语
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000249876000014
PublisherSCIENCE CHINA PRESS
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/92187
Collection中国科学院金属研究所
Corresponding AuthorChen Demin
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Deng Xiaoxia,Cheng Honghui,Li Shenlan,et al. Effects of absorption/desorption cycles on hydrogen storage properties of V and V0.9Cr0.1 alloy[J]. ACTA METALLURGICA SINICA,2007,43(9):977-982.
APA Deng Xiaoxia,Cheng Honghui,Li Shenlan,Lue Manqi,Chen Demin,&Yang Ke.(2007).Effects of absorption/desorption cycles on hydrogen storage properties of V and V0.9Cr0.1 alloy.ACTA METALLURGICA SINICA,43(9),977-982.
MLA Deng Xiaoxia,et al."Effects of absorption/desorption cycles on hydrogen storage properties of V and V0.9Cr0.1 alloy".ACTA METALLURGICA SINICA 43.9(2007):977-982.
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