Improved the Physical and Electrochemical Hydrogen Storage Kinetics of Mg2Ni-Type Alloys by Substituting Ni with Co and Melt Spinning

Zhi Hong Ma; Bo Li; Dong Liang Zhao; Hui Ping Ren; Guo Fang Zhang; Yang Huan Zhang

doi:10.4028/www.scientific.net/AMR.415-417.1565

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 415-417Improved the Physical and Electrochemical Hydrogen...

Improved the Physical and Electrochemical Hydrogen Storage Kinetics of Mg₂Ni-Type Alloys by Substituting Ni with Co and Melt Spinning

Abstract:

In this paper, melt-spinning technology was used for preparing Mg₂₀Ni_10-xCo_x (x = 0, 1, 2, 3, 4) hydrogen storage alloys. The influences of both the Co substitution and the melt spinning on the the physical and electrochemical hydrogen storage kinetics of the alloys were investigated. The XRD, SEM and TEM characterization exhibits that the as-spun Co-free alloy holds a typical nanocrystalline structure, whereas the as-spun alloys substituted by Co display a nanocrystalline and amorphous structure, confirming that the substitution of Co for Ni facilitates the glass formation in the Mg₂Ni-type alloy. The Co substitution gives rise to forming secondary phase MgCo₂ without altering the Mg₂Ni major phase of the alloys. The measurement of the physical and electrochemical hydrogen storage kinetics of the alloys shows that both the melt spinning and the substitution of Co for Ni markedly improve the physical hydriding and dehydriding kinetics and the electrochmeical kinetics (HRD) of the alloys.

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Advanced Materials Research (Volumes 415-417)

Pages:

1565-1571

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.415-417.1565

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Online since:

December 2011

Authors:

Zhi Hong Ma, Bo Li, Dong Liang Zhao, Hui Ping Ren, Guo Fang Zhang, Yang Huan Zhang

Keywords:

Hydrogen Storage Kinetics, Melt-Spinning, Mg₂Ni-Type Alloy, Substituting Ni with Co

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