Microstructure and hydrogen storage properties of melt-spun Mg–Cu–Ni–Y alloys

Kalinichenka, Siarhei; Röntzsch, Lars; Riedl, Thomas; Gemming, Thomas; Weißgärber, Thomas; Kieback, Bernd

doi:10.1016/j.ijhydene.2010.10.099

Cited by 85 publications

(19 citation statements)

References 31 publications

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“…Rongeat et al [9] reported a 70% decay in capacity after 20 charge/discharge cycles. A lot of effort has been put into increasing the corrosion resistance of MgNi-based alloys to KOH electrolytes, mostly through studying various types of substitutions in the MgNi formula, such as replacements of the A-(by rare earth, transition, or other metals [10]) and B-sites (by transition metals [11,12]), different fabrication procedures [13], and surface treatment [14].…”

Section: Introductionmentioning

confidence: 99%

Effects of Salt Additives to the KOH Electrolyte Used in Ni/MH Batteries

Yan

Kim

2015

Batteries

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KOH-based electrolytes with different salt additives were investigated to reduce their corrosive nature toward Mg/Ni metal hydride alloys used as negative electrodes in nickel metal hydride (Ni/MH) batteries. Alkaline metal halide salts and oxyacid salts were studied as additives to the traditional KOH electrolyte with concentrations varying from 0.005 M to 1.77 M. Effects of the cations and anions of the additives on charge/discharge performance are discussed. The reduction potential of alkaline cations and radii of halogen anions were correlated with initial capacity and degradation of the metal hydride alloy. A synergistic effect between KOH and some oxyacid salt additives was observed and greatly influenced by the nature of the salt additives. It was suggested that both the formation of a solid film over the metal hydride surface and the promotion of proton transfer in the additives containing electrolytes led to a decreased degradation of the electrodes and an increased discharge capacity. 12 salt additives, NaC2H3O2, KC2H3O2, K2CO3, Rb2CO3, Cs2CO3, K3PO4, Na2WO4, Rb2SO4, Cs2SO4, NaF, KF, and KBr, were found to increase the corrosion resistance of the MgNi-based metal hydride alloy.

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Section: Introductionmentioning

confidence: 99%

Effects of Salt Additives to the KOH Electrolyte Used in Ni/MH Batteries

Yan

Kim

2015

Batteries

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“…It has been reported that the gaseous kinetics performances are very sensitive to their structures [12]. Particularly, reducing the grain sizes to nanometer level can dramatically speed up hydriding/dehydriding rate of the alloys [13,14]. Some techniques, including: (a) rapid solidification (RS) [15], (b) mechanical milling (MA) [16], (c) equal channel angular pressing (ECAP) [17], (d) hydriding combustion synthesis [18] have been used to prepare nanocrystalline and amorphous alloys.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen storage properties of nanocrystalline and amorphous Pr–Mg–Ni-based alloys synthesized by mechanical milling

Zhang

Shang

et al. 2017

International Journal of Hydrogen Energy

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“…A summarization to the numerous publications regarding the upgrade of hydrogenation properties of Mg-based alloys finds that primary principles for improving the hydrogen storage properties of Mg-based alloys are classified into two categories: first one is to add catalytic elements such as transition metals, transition metal oxides and rare-earth (RE) metals [13e15], and the second one is to prepare an ultra-fine microstructure and reducing the grain size far below the micrometer scale [16,17]. Some techniques have been successfully applied to synthesize amorphous and nanocrystalline Mg-based alloys with different compositions, including (a) mechanical milling [18], (b) rapid solidification (RS) [19], (c) hydriding combustion synthesis [20] and (d) equal channel angular pressing (ECAP) [21], Mechanical milling and melt spinning, in particular, are universally accepted techniques for obtaining amorphous and/or nanocrystalline alloys with a very homogeneous element distribution.…”

Section: Introductionmentioning

confidence: 99%