Hydrogen storage behavior of nanocrystalline and amorphous Mg–Ni–Cu–La alloys

Hou, Zhongjun; Zhang, Wei; Wei, Xin; Yuan, Zeming; Ge, Qilu

doi:10.1039/d0ra05417h

Cited by 5 publications

(2 citation statements)

References 43 publications

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“…Figure 10 illustrates that all samples containing CNTs exhibit activation after a couple of full charge/discharge cycles, reaching steady-state values of 24-25 mAh/g. These values are slightly lower than those recently obtained for an as-cast Mg-Ni-Cu-La alloy [54]. At the same time, the CNT-free MgNiCuY_5 alloy has a relatively low capacity (<10 mAh/g) over several cycling numbers.…”

Section: Electrochemical Experimentscontrasting

confidence: 63%

Thermal, Microstructural and Electrochemical Hydriding Performance of a Mg65Ni20Cu5Y10 Metallic Glass Catalyzed by CNT and Processed by High-Pressure Torsion

et al. 2022

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A Mg65Ni20Cu5Y10 metallic glass was produced by melt spinning and was mixed with a 5 wt.% multiwall carbon nanotube additive in a high-energy ball mill. Subsequently, the composite mixture was exposed to high-pressure torsion deformation with different torsion numbers. Complimentary XRD and DSC experiments confirmed the exceptional structural and thermal stability of the amorphous phase against severe plastic deformation. Combined high-resolution transmission electron microscopy observations and fast Fourier transform analysis revealed deformation-induced Mg2Ni nanocrystals, together with the structural and morphological stability of the nanotubes. The electrochemical hydrogen discharge capacity of the severely deformed pure metallic glass was substantially lower than that of samples with the nanotube additive for several cycles. It was also established that the most deformed sample containing nanotubes exhibited a drastic breakdown in the electrochemical capacity after eight cycles.

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Section: Electrochemical Experimentscontrasting

confidence: 63%

Thermal, Microstructural and Electrochemical Hydriding Performance of a Mg65Ni20Cu5Y10 Metallic Glass Catalyzed by CNT and Processed by High-Pressure Torsion

et al. 2022

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“…Common methods to improve the hydrogen storage performance of MgH 2 include alloying [9][10][11][12][13][14][15][16][17][18], nanoconfinement [19,20], nano-crystallization [21][22][23][24][25][26], and catalyst doping [27][28][29][30][31][32][33][34][35]. Alloying of Mg by combining with other metal elements, such as Al, Ni, and Ge, can produce less stable Mg-based hydrides.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Hydrogen Storage Performance of MgH2 by the Catalysis of a Novel Intersected Y2O3/NiO Hybrid

Liu

Wang

et al. 2021

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MgH2 is one of the most promising hydrogen storage materials due to its high hydrogen storage capacity and favorable reversibility, but it suffers from stable thermodynamics and poor dynamics. In the present work, an intersected Y2O3/NiO hybrid with spherical hollow structure is synthesized. When introduced to MgH2 via ball-milling, the Y2O3/NiO hollow spheres are crushed into ultrafine particles, which are homogenously dispersed in MgH2, showing a highly effective catalysis. With an optimized addition of 10 wt% of the hybrid, the initial dehydrogenation peak temperature of MgH2 is reduced to 277 °C, lowered by 109 °C compared with that of the bare MgH2, which is further reduced to 261 °C in the second cycle. There is ca. 6.6 wt% H2 released at 275 °C within 60 min. For the fully dehydrogenation product, hydrogenation initiates at almost room temperature, and a hydrogenation capacity of 5.9 wt% is achieved at 150 °C within 150 min. There is still 5.2 wt% H2 desorbed after 50 cycles at a moderate cyclic condition, corresponding to the capacity retention of 79.2%. The crystal structure and morphology of the Y2O3/NiO hybrid is well preserved during cycling, showing long-term catalysis to the hydrogen storage of MgH2. The Y2O3/NiO hybrid also inhibits the agglomeration of MgH2 particles during cycling, favoring the cyclic stability.

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Anionic LaH8−: A nanocluster-based hydrogen storage material

Huang

Wang

et al. 2022

International Journal of Hydrogen Energy

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Hydrogen storage behavior of nanocrystalline and amorphous Mg–Ni–Cu–La alloys

Abstract: In order to enhance the characteristics of Mg2Ni-type alloys, Cu and La were added to an Mg2Ni-type alloy, and sample alloys were prepared by melt spinning. The effects of La content and spinning rate on the hydrogen storage properties were explored.

Cited by 5 publications

References 43 publications

Thermal, Microstructural and Electrochemical Hydriding Performance of a Mg65Ni20Cu5Y10 Metallic Glass Catalyzed by CNT and Processed by High-Pressure Torsion

Thermal, Microstructural and Electrochemical Hydriding Performance of a Mg65Ni20Cu5Y10 Metallic Glass Catalyzed by CNT and Processed by High-Pressure Torsion

Enhanced Hydrogen Storage Performance of MgH2 by the Catalysis of a Novel Intersected Y2O3/NiO Hybrid

Anionic LaH8−: A nanocluster-based hydrogen storage material

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