Electrochemical hydrogenation of Mg76Li12Al12 solid solution phase

Pavlyuk, Volodymyr; Ciesielski, Wojciech; Pavlyuk, Nazar; Kulawik, Damian; Szyrej, Małgorzata; Rozdzynska-Kielbik, Beata; Kordan, V.

doi:10.1007/s11581-018-2743-8

Cited by 16 publications

(9 citation statements)

References 27 publications

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“…While the electrochemical properties of the electrode materials depend on the corrosion stability of the alloys in the electrolyte solution (6 M KOH). In our previous works [5][6][7], doping Tb2Ni17-based electrodes by s-elements (Li, Mg) and Sb led to the increasing of the corrosion stability and hydrogen sorption ability.…”

Section: Electrochemical Hydrogenation Of La2mg17-xmxmentioning

confidence: 91%

“…Similar content of phases is presented for Sb-contained alloy. Predicted solid solution La2Mg16.2Sb0.8 (main phase, see Figure 4d) was with the composition La11.1(5)Mg84.2(8)Sb4.7 (6). Trace amounts of Mg (La2.2(6)Mg95.9(8)Sb1.9(8)) and cubic LaMg3-xSbx (La24.8(5)Mg72.2(7)Sb3.0(7), а = 7.4639(8) Å, V = 415.8(1) Å 3 ) phase were observed.…”

Section: Powder Xrd and Edx Studies Of La2mg17-xmx Alloymentioning

confidence: 95%

“…Doping of metals and alloys by s-or p-elements positively influence on the electrochemical and sorption properties of the samples of electrodes. For instance, doping of magnesium by Li and Al improves its hydrogen sorption and corrosion resistance [6,7], doping of Tb2Ni17 by Li, Mg, Al, Ge, Sn, Sb and Bi also enhances its corrosion resistance and discharge time of the battery [8]. The alloys containing Mg became popular for the development of light and safe for the environment materials.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis, crystal structure, and electrochemical hydrogenation of the La2Mg17-xMx (M = Ni, Sn, Sb) solid solutions

et al. 2021

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The crystal structure of La2Mg17-xSnx solid solution was determined by single crystal X-ray diffraction for the first time. This phase crystallizes in hexagonal symmetry with space group P63/mmc (a = 10.3911(3), c = 10.2702(3) Å, V = 960.36(6) Å3, R1 = 0.0180, wR2 = 0.0443 for the composition La3.65Mg30Sn1.10) and is related to the structure of CeMg10.3 and Th2Ni17-types which are derivative from the CaCu5-type. A series of isotypical solid solutions La2Mg17-xMx (M = Ni, Sn, Sb, x ~0.8) was synthesized and studied by X-ray powder diffraction, energy dispersive X-ray spectroscopy and fluorescent X-ray spectroscopy. All solid solutions crystallize with the structure related to the Th2Ni17-type. The electrochemical hydrogenation confirmed the similar electrochemical behavior of all studied alloys. The amount of deintercalated hydrogen depends on the physical and chemical characteristics of doping elements and increases in the sequence Sn < Mg < Sb < Ni. The most geometrically advantageous sites are octahedral voids 6h of the initial structure, thus a coordination polyhedron for H-atom is an octahedron [HLa2(Mg,M)4].

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Section: Electrochemical Hydrogenation Of La2mg17-xmxmentioning

confidence: 91%

Section: Powder Xrd and Edx Studies Of La2mg17-xmx Alloymentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

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Synthesis, crystal structure, and electrochemical hydrogenation of the La2Mg17-xMx (M = Ni, Sn, Sb) solid solutions

et al. 2021

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“…Use of Al, Mg, Mn, Ni, and Co as alloying components results into the improvement of corrosion stability, increasing of life-time and capacity of electrode materials [4 -8]. Improvement of the hydrogen sorption ability, specific capacity and corrosion potential was observed after the doping of metallic Mg-based electrode with Li and Al [9,10].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, crystal structure and physical properties of the TbCo4.5SixLi0.5-x solid solution

Stetskiv

Kordan

Tarasiuk

et al. 2021

Phys. Chem. Solid St.

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Alloys from the region of existence of the solid solution TbCo4.5SixLi0.5-x were synthesized by arc melting. Quantitative and qualitative composition of alloys and powders of electrode materials was determined by scanning electron microscopy and energy-dispersive X-ray spectroscopy. The Tb/Co/Si ratio in the samples was confirmed by X-ray fluorescence spectroscopy. The change in cell parameters within the solid solution existence was established by the results of X-ray powder diffraction (TbCo4.5SixLi0.5-x, x = 0.1–0.4: a = 4.9518(5) – 4.9324(3), c = 3.9727(4) – 3.9746(3) Å). The crystal structure of the solid solution was determined by the Rietveld method (CaCu5 structure type, space group P6/mmm). Cobalt atoms are partially replaced by silicon and lithium only in 2c position. The ability of alloys to reversibly absorb hydrogen was studied by the method of electrochemical hydrogenation. Under experimental conditions the amount of deintercalated hydrogen was about 0.19 H/f.u. The change in cell parameters after hydrogenation (volume increases from 83.74(1) to 85.54(6) Å3) and the stability of the electrode in the electrolyte solution was further confirmed by X-ray phase analysis. Measurements of the electrical resistivity of the samples indicated a decrease of resistivity value with a slight increase in the amount of alkali metal in samples.

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“…Magnesium alloys are of great interest due to their use as electrodes in magnesium ion batteries (Rana & Fuminori, 2014;Pavlyuk et al, 2018Pavlyuk et al, , 2019a, sorption materials for hydrogen storage (Crivello et al, 2016;Vajeeston et al, 2008;Fichtner et al, 2003;Pavlyuk et al, 2019b) and as superconducting materials (Nagamatsu et al, 2001;Rafieazad et al, 2017). Alloys containing p-block elements from Group 13 (B, Al, Ga and In), d-block metals (Mn, Cu, Pd and others) and sblock metals (Li and Mg) have been studied with the emphasis on the formation probability of new intermetallic compounds as well as the determination of their crystal structures (Milashius et al, 2018;Pavlyuk et al, 1995Pavlyuk et al, , 2005Pavlyuk et al, , 2007Chumak et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

New cubic cluster phases in the Mg–Ni–Ga system

Pavlyuk

Dmytriv

Pavlyuk

et al. 2020

Acta Crystallogr B Struct Sci Cryst Eng Mater

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The crystal structure of new Mg9Ni6Ga14 and Mg3Ni2Ga compounds were investigated by single-crystal diffraction. Both structures can be described as three-core-shell cluster compounds. In the Mg6Ni9Ga14 structure, the [Ni6Ga6] icosahedron is encapsulated within the [Mg20] dodecahedron, which is again encapsulated within a [Ni18Ga42] fullerene-like truncated icosahedron, thus the three core–shell cluster [Ni6Ga6@Mg20@Ni18Ga42] results. In the Mg3Ni2Ga structure, the [Mg6] octahedron is encapsulated within the [Ni12Ga6] flattened icosahedron in vertices of which there are 12 nickel atoms, and six lateral edges are centered by gallium atoms, which in turn is encapsulated within a [Mg36] pseudo-rhombicuboctahedron with 12 additional atoms centering the lateral faces; thus for Mg3Ni2Ga the three-shell cluster is [Mg6@Ni12Ga6@Mg36].

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Electrochemical hydrogenation of Mg76Li12Al12 solid solution phase

Cited by 16 publications

References 27 publications

Synthesis, crystal structure, and electrochemical hydrogenation of the La2Mg17-xMx (M = Ni, Sn, Sb) solid solutions

Synthesis, crystal structure, and electrochemical hydrogenation of the La2Mg17-xMx (M = Ni, Sn, Sb) solid solutions

Synthesis, crystal structure and physical properties of the TbCo4.5SixLi0.5-x solid solution

New cubic cluster phases in the Mg–Ni–Ga system

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