Stability and magnetism of hydrides of nonstoichiometric ZrMn2

Pourarian, F.; Fujii, H.; Wallace, W.E.; Sinha, Vijay Kumar; Smith, H.K.

doi:10.1021/j150621a020

Cited by 84 publications

(11 citation statements)

References 2 publications

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“…Particle size distributions of the alloys after 10 absorption/desorption cycles were analyzed by a Malvern Mastersizer laser particle sizer. It can be seen that the crystal structures of the ZrMn 0.85 Fe and ZrMn 0.65 Fe 1.2 alloys were characterized as C14 (MgZn 2 ) type hexagonal structure with P6 3 /mmc space group, just like that of ZrMn 2 alloy [4]. When x was increased to 0.7, the alloy transformed into a cubic structure according to Suzuki et al [8] and Li and Nishimiya [11] who studied on the crystal structures of Zr(Fe x Mn 1−x ) 2 alloys.…”

Section: Methodsmentioning

confidence: 98%

“…Furthermore, Fe has a smaller radius than Mn, therefore, the cell volume decreases with the increase of Fe content and the decrease on Mn content, resulting in a smaller interstitial hole size for the occupation of hydrogen atom, thus the equilibrium pressure increases [11,[15][16][17]. It is obvious that the ZrMn 0.85 Fe alloy raises the decomposition pressure about 160 times compared with the published results of ZrMn 2 alloy [4,6]. The maximum hydrogen storage capacity of ZrMn 0.85 Fe at 2.5 MPa and 293 K is 3.05.…”

Section: Pressure-composition Isothermsmentioning

confidence: 96%

“…For example, they have larger hydrogen storage capacity and longer electrochemically charging/discharging cycle life than AB 5 alloys [1,2]. However, although ZrMn 2 alloy can absorb relatively large amounts of hydrogen, the plateau pressure is too low and the hydrides are too stable to be practically used in reversible hydrogen storage [3,4]. So far, many efforts have been made to enhance the plateau pressure of zirconium-based alloys and it has been confirmed that replacement of Mn by some other transition metals such as Fe could elevate the plateau pressure [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Investigation of hydrogen absorption/desorption properties of ZrMn0.85−xFe1+x alloys

Cheng

Deng

et al. 2008

Journal of Alloys and Compounds

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Section: Methodsmentioning

confidence: 98%

Section: Pressure-composition Isothermsmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Investigation of hydrogen absorption/desorption properties of ZrMn0.85−xFe1+x alloys

Cheng

Deng

et al. 2008

Journal of Alloys and Compounds

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“…As a representative of Zr-based Laves phase alloys, ZrMn 2 shows high hydrogen storage capacity (1.8 wt.%). However, the low equilibrium pressure and effective desorption capacity at moderate temperatures limit its commercial application [3][4].…”

Section: Introductionmentioning

confidence: 99%

Effect of Ti content on the hydrogen storage properties of Zr1−x Ti x Mn2Ce0.015 alloys

Liu

et al. 2010

Rare Metals

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The effect of Ti content on the hydrogen storage properties of Zr 1−x Ti x Mn 2 Ce 0.015 (x = 0, 0.2, 0.3, 0.5) alloys was studied by X-ray diffraction, scanning electron microscopy and pressure-composition (p-c) isotherm measurement. All of the alloys mainly consist of C14-type Laves and CeO 2 phases. As the Ti content increases, the lattice parameters of the Laves phase decrease and the unit cell shrinks anisotropically, the total hydrogen absorption capacity decreases but the reversible hydrogen desorption capacity of the alloys increases, and the equilibrium pressure of the alloys increases but the plateau becomes sloping. The changes of hydrogen storage properties of Zr 1−x Ti x Mn 2 Ce 0.015 alloys are related to the differences in both atomic radius and hydrogen affinity between Ti and Zr elements.

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“…But the ZrMn 2+x alloy can maintain the C14 structure in the composition range of x= -0.2-1.8 [22,23]. ZrMn x (x=1.8 to 3.8) binary alloys have been studied by different researchers [16].…”

Section: Introductionmentioning

confidence: 99%

Improvement in the electrochemical properties of ZrMn2 hydrides by substitution of elements

Song

Kwon

Ahn³

et al. 2001

Met. Mater. Int.

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The hydrogen-storage properties and the electrochemical properties are investigated for the alloys ZrMn 2 Ni x , ZrMnNi 1+x , Zr 0.5 Ti 0.5 Mn 0.4 V 0.6 Ni 1-x Fe x and Zr 0.5 Ti 0.5 Mn 0.4 V 0.6 Ni 0.85 M 0.15 . The C14 Laves phase forms in all the alloys ZrMn 2 Ni x (x=0.0, 0.3, 0.6, 0.9 and 1.2). Among the alloys ZrMn 2 Ni x , ZrMn 2 Ni 0.6 has the largest discharge capacity (29 mAh/g) and a relatively good cycling performance, and shows a relatively easy activation. The C14 Laves phase also forms in all the alloys ZrMnNi 1+x (x=0.0, 0.1, 0.2, 0.3 and 0.4). Among the alloys ZrMnNi 1+x , ZrMnNi 1.0 has the largest discharge capacity (42 mAh/g) and a relatively good cycling performance, and shows the easiest activation. Zr 0.5 Ti 0.5 Mn 0.4 V 0.6 Ni 1-x Fe x (x=0.00, 0.15, 0.30, 0.45 and 0.60) has the C14 Laves phase hexagonal structure. Their hydrogen storage capacities do not show significant differences. The discharge capacity just after activation decreases with an increase in the amount of the substituted Fe but the cycling performance is improved. The discharge capacity after activation of the alloy with x=0.00 is about 240 mAh/g at the current density 60 mA/g.

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Stability and magnetism of hydrides of nonstoichiometric ZrMn2

Cited by 84 publications

References 2 publications

Investigation of hydrogen absorption/desorption properties of ZrMn0.85−xFe1+x alloys

Investigation of hydrogen absorption/desorption properties of ZrMn0.85−xFe1+x alloys

Effect of Ti content on the hydrogen storage properties of Zr1−x Ti x Mn2Ce0.015 alloys

Improvement in the electrochemical properties of ZrMn2 hydrides by substitution of elements

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