Hydrogen storage performance of 5LiBH4 + Mg2FeH6 composite system

Deng, Shuaishuai; Xiao, Xuezhang; Han, Leyuan; Li, Yun; Li, Shouquan; Ge, Hongwei; Wang, Qidong; Chen, Lixin

doi:10.1016/j.ijhydene.2012.01.094

Cited by 27 publications

(15 citation statements)

References 20 publications

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“…This may be due to some interaction of Fe with LiBH 4 but the real explanation is still unclear. [9]. Therefore, they treated Mg 2 FeH 6 as a catalyst for LiBH 4 and as their amount of LiBH 4 is 10 times higher than in the present study comparing our results with theirs is problematic.…”

Section: Figurecontrasting

confidence: 52%

“…Puskiel and Gennari have shown that the composite powder Mg 15 Fe doped with ~10 mol.% LiBH 4 shows much higher capacity and faster kinetics than the undoped composite [8]. Deng at al used Mg 2 FeH 6 as a catalyst for LiBH 4 and found that the sorption properties of LiBH 4 are improved [9]. In a recent investigation, Li et al showed that the in the mixtures xLiBH 4 + (1-x)Mg 2 FeH 6 (x<0.5) both hydrides simultaneously release hydrogen [10].…”

Section: Introductionmentioning

confidence: 99%

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Effect of synthesis route on the hydrogen storage properties of 2MgH2–Fe compound doped with LiBH4

Gosselin

Deledda

Hauback

et al. 2015

Journal of Alloys and Compounds

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The hydrogen storage properties of a 2:1 mole ratio of MgH 2 and Fe with or without 10 wt. % of LiBH 4 were investigated. Two doping methods were used: the first one consisted of two steps: first the 2MgH 2 +Fe mixture was ball milled for 10 hours and subsequently LiBH 4 was added and milling resumed for 1 more hour. In the second method all materials were mixed and ball milled for 10 hours. The first method produced materials with an hydrogen dehydrogenation capacity of 2,69 wt.% at 623 K and that could re-absorb 2,93 wt.% H 2 . The materials made by the second method presented a hydrogen dehydrogenation capacity of 2,98 wt.% at 623 K and re-absorbed 3,10 wt.% H 2 . For both methods, the rehydrided sample consisted only of MgH 2 . The reversibility of the reaction was enhanced with the LiBH 4 , but this additive, by acting as a catalyst for the formation of MgH 2 , precludes the formation of Mg 2 FeH 6 .

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Section: Figurecontrasting

confidence: 52%

Section: Introductionmentioning

confidence: 99%

Effect of synthesis route on the hydrogen storage properties of 2MgH2–Fe compound doped with LiBH4

Gosselin

Deledda

Hauback

et al. 2015

Journal of Alloys and Compounds

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“…The dehydriding process of 0.8LiBH4 + 0.2Mg2FeH6 was investigated by Langmi et al [14] and Deng et al [15]. Both of them reported that the dehydriding temperature of LiBH4 was decreased by combining with Mg2FeH6 by the following two-step dehydriding process.…”

Section: + Cations and [Bh4]mentioning

confidence: 99%

Dehydriding Process and Hydrogen–Deuterium Exchange of LiBH4–Mg2FeD6 Composites

Matsuo

Aoki

et al. 2015

Energies

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Abstract:The dehydriding process and hydrogen-deuterium exchange (H-D exchange) of xLiBH4 + (1 − x)Mg2FeD6 (x = 0.25, 0.75) composites has been studied in detail. For the composition with x = 0.25, only one overlapping mass peak of all hydrogen and deuterium related species was observed in mass spectrometry. This implied the simultaneous dehydriding of LiBH4 and Mg2FeD6, despite an almost 190 °C difference in the dehydriding temperatures of the respective discrete complex hydrides. − was replaced by D atoms immediately before the dehydriding. In contrast to the situation for x = 0.25, firstly LiBH4 and Mg2FeD6 dehydrided simultaneously with a special molar ratio = 1:1 at x = 0.75, and then the remaining LiBH4 reacted with the Mg and Fe derived from the dehydriding of Mg2FeD6.

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“…There is still significant interest in investigation and modeling of the basic physical properties and cyclic behavior of this hydride [18][19][20][21][22][23][24][25][26]. Furthermore, studies of the influence of different additives and new synthesis routes are still within the scope of work of different teams [27][28][29][30][31][32][33]. Considering that this is one of the most effective methods available for complex hydride manufacturing, this information, provided as a tool for the hydrogen storage research community, will enable a simple, fast and effective synthesis of high-purity magnesium-iron hydride.…”

Section: Introductionmentioning

confidence: 99%

Mg2FeH6 Synthesis Efficiency Map

et al. 2018

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Abstract:The influences of the processing parameters on the Mg 2 FeH 6 synthesis yield were studied. Mixtures of magnesium hydride (MgH 2 ) and iron (Fe) were mechanically milled in a planetary ball mill under argon for 0.5-, 1-, 2-and 3-h periods and subsequently sintered at temperatures from 300-500 • C under hydrogen. The reaction yield, phase content and hydrogen storage properties of the received materials were investigated. The morphologies of the powders after synthesis were studied by SEM. The synthesis effectiveness map was presented. The obtained results prove that synthesis parameters, such as the milling time and synthesis temperature, greatly influence the reaction yield and material properties and show that extended mechanical milling may not be beneficial to the reaction efficiency.

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Hydrogen storage performance of 5LiBH4 + Mg2FeH6 composite system

Cited by 27 publications

References 20 publications

Effect of synthesis route on the hydrogen storage properties of 2MgH2–Fe compound doped with LiBH4

Effect of synthesis route on the hydrogen storage properties of 2MgH2–Fe compound doped with LiBH4

Dehydriding Process and Hydrogen–Deuterium Exchange of LiBH4–Mg2FeD6 Composites

Mg2FeH6 Synthesis Efficiency Map

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