LiBH4−Mg(BH4)2: A Physical Mixture of Metal Borohydrides as Hydrogen Storage Material

Bardají, Elisa Gil; Zhao‐Karger, Zhirong; Boucharat, N.; Nale, Angeloclaudio; Setten, Michiel J. van; Lohstroh, Wiebke; Röhm, Eva; Catti, M.; Fichtner, Maximilian

doi:10.1021/jp110518s

Cited by 87 publications

(94 citation statements)

References 48 publications

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“…200°C in a relatively wide composition range 0.6 \ x \ 0.8 [71]. 4 all displayed melting behaviour below that of the monometallic phases (up to 167°C lower) [70][71][72][73][74]. Generally, each system can behave differently with respect to their physical behaviours upon melting.…”

Section: Eutectic Melting Complex Hydridesmentioning

confidence: 99%

“…Other examples of mutual destabilization systems containing two different complex metal hydrides may include the LiBH 4 -Y(BH 4 ) 3 [230] and LiBH 4 -Mg(BH 4 ) 2 systems [72]. However, it is still not clear whether there is clear evidence supporting the direct destabilizing reaction between LiBH 4 and the other metal borohydrides, as they can also form stable metal borides by themselves without any reaction with LiBH 4 .…”

Section: Reactive Hydride Compositesmentioning

confidence: 99%

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Complex and liquid hydrides for energy storage

et al. 2016

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The research on complex hydrides for hydrogen storage was initiated by the discovery of Ti as a hydrogen sorption catalyst in NaAlH 4 by Boris Bogdanovic in 1996. A large number of new complex hydride materials in various forms and combinations have been synthesized and characterized, and the knowledge regarding the properties of complex hydrides and the synthesis methods has grown enormously since then. A significant portion of the research groups active in the field of complex hydrides is collaborators in the International Energy Agreement Task 32. This paper reports about the important issues in the field of complex hydride research, i.e. the synthesis of borohydrides, the thermodynamics of complex hydrides, the effects of size and confinement, the hydrogen sorption mechanism and the complex hydride composites as well as the properties of liquid complex hydrides. This paper is the result of the collaboration of several groups and is an excellent summary of the recent achievements.

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Section: Eutectic Melting Complex Hydridesmentioning

confidence: 99%

Section: Reactive Hydride Compositesmentioning

confidence: 99%

Complex and liquid hydrides for energy storage

et al. 2016

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“…Hydrogen release is also induced by mechanically milling Mg(BH 4 ) 2 with TiO 2 resulting in release of 2.4 wt % H 2 at 271 • C while undergoing reversible dehydrogenation to Mg(B 3 H 8 ) 2 [20]. Alternatively, the thermal dehydrogenation of Mg(BH 4 ) 2 has been shown to be accelerated in eutectic mixtures with LiBH 4 [21][22][23]. Another study claimed that the addition of LiH to Mg(BH 4 ) 2 induced hydrogen evolution at temperatures as low as 150 • C and enabled the cycling of 3.6 wt % H 2 through 20 cycles at 180 • C [24].…”

Section: Introductionmentioning

confidence: 99%

Lewis Base Complexes of Magnesium Borohydride: Enhanced Kinetics and Product Selectivity upon Hydrogen Release

2017

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“…0.725LiBH4-0.275KBH4 has the lowest eutectic melting temperature at Tm = 105 °C (KBH4, Tm > 600 °C) [30]. The system xLiBH4−(1 − x)Mg(BH4), x = 0.5 to 0.6, melts at Tm ~ 180 °C (Mg(BH4)2, Tm > 280 °C) and shows improved thermodynamics and kinetics, as decomposition proceeds immediately after melting and releases 7 wt% H2 already at T = 270 °C [11,31]. 0.68LiBH4-0.32Ca(BH4)2 has a eutectic melting temperature at Tm = 200 °C (Ca(BH4)2, Tm = 370 °C), releases ~10 wt% H2 at T < 400 °C and also shows partial reversibility with respect to hydrogen storage [28,32,33].…”

Section: Introductionmentioning

confidence: 99%

Melting Behavior and Thermolysis of NaBH4−Mg(BH4)2 and NaBH4−Ca(BH4)2 Composites

Ley¹,

Roedern²,

Thygesen³

2015

Energies

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Abstract:The physical properties and the hydrogen release of NaBH4-Mg(BH4)2 and NaBH4−Ca(BH4)2 composites are investigated using in situ synchrotron radiation powder X-ray diffraction, thermal analysis and temperature programmed photographic analysis. The composite, xNaBH4-(1 − x)Mg(BH4)2, x = 0.4 to 0.5, shows melting/frothing between 205 and 220 °C. However, the sample does not become a transparent molten phase. This behavior is similar to other alkali-alkaline earth metal borohydride composites. In the xNaBH4-(1 − x)Ca(BH4)2 system, eutectic melting is not observed. Interestingly, eutectic melting in metal borohydrides systems leads to partial thermolysis and hydrogen release at lower temperatures and the control of sample melting may open new routes for obtaining high-capacity hydrogen storage materials.

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LiBH₄−Mg(BH₄)₂: A Physical Mixture of Metal Borohydrides as Hydrogen Storage Material

Cited by 87 publications

References 48 publications

Complex and liquid hydrides for energy storage

Complex and liquid hydrides for energy storage

Lewis Base Complexes of Magnesium Borohydride: Enhanced Kinetics and Product Selectivity upon Hydrogen Release

Melting Behavior and Thermolysis of NaBH4−Mg(BH4)2 and NaBH4−Ca(BH4)2 Composites

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