Modified Lithium Borohydrides for Reversible Hydrogen Storage (2)

Au, Ming

doi:10.1021/jp065490h

Cited by 141 publications

(153 citation statements)

References 9 publications

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“…The phenomenon of hydrogenation agrees well with that presented in Fig. 2 where the onset temperatures of TiF 3 and TiCl 3 doped mixtures are [7,22] or MgH 2 [23] system. The times to full dehydrogenation are 4000 s and 6000 s respectively.…”

Section: Absorptionedesorption Kinetics For Ti-doped Lih/ Mgb 2 Mixturessupporting

confidence: 89%

“…Zü ttel et al found that SiO 2 helps to decompose LiBH 4 and liberate large amount (9 wt.%) of hydrogen from a temperature of 200 C [4,5]. Au et al showed that some transition metal oxides or chlorides are able to decompose LiBH 4 [6,7]. The reverse hydrogenation is even feasible for some modified complex systems as shown by Vajo et al with the system LiBH 4 þ MgH 2 [8].…”

Section: Introductionmentioning

confidence: 99%

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The effects of Ti-based additives on the kinetics and reactions in LiH/MgB2 hydrogen storage system

Zhang

Morin

Huot

2011

International Journal of Hydrogen Energy

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Section: Absorptionedesorption Kinetics For Ti-doped Lih/ Mgb 2 Mixturessupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

The effects of Ti-based additives on the kinetics and reactions in LiH/MgB2 hydrogen storage system

Zhang

Morin

Huot

2011

International Journal of Hydrogen Energy

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“…Since Bogdanovic et al found that the addition of Ti-based compounds significantly promoted the dehydrogenation-rehydrogenation reactions of NaAlH 4 [193], the development of complex hydrides for hydrogen storage has significantly increased. Stimulated by this finding, a large number of additives from oxides, halides, metals, and carbon-based materials to M(BH 4 ) n have been examined [19,20,58,87,101,130,144,150,161,168,170,171,191,[194][195][196][197][198][199][200][201][202][203][204][205][206][207][208][209][210]; the corresponding dehydrogenation and rehydrogenation properties are summarized in Table 5. For instance, the most effective additive for LiBH 4 was found to be the mixture of 0.2 MgCl 2 + 0.1 TiCl 3 , in which approximately 5 mass% of hydrogen was released from 333 K and 4.5 mass% of hydrogen was rehydrogenated at 873 K in 7 MPa H 2 [195].…”

Section: Promoting Kineticsmentioning

confidence: 99%

Recent Progress in Metal Borohydrides for Hydrogen Storage

et al. 2011

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Abstract:The prerequisite for widespread use of hydrogen as an energy carrier is the development of new materials that can safely store it at high gravimetric and volumetric densities. Metal borohydrides M(BH 4 ) n (n is the valence of metal M), in particular, have high hydrogen density, and are therefore regarded as one such potential hydrogen storage material. For fuel cell vehicles, the goal for on-board storage systems is to achieve reversible store at high density but moderate temperature and hydrogen pressure. To this end, a large amount of effort has been devoted to improvements in their thermodynamic and kinetic aspects. This review provides an overview of recent research activity on various M(BH 4 ) n , with a focus on the fundamental dehydrogenation and rehydrogenation properties and on providing guidance for material design in terms of tailoring thermodynamics and promoting kinetics for hydrogen storage.

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“…[5][6][7][8][9][10][11][12][13][14][15] These strategies generally led to an improvement in their hydrogen sorption properties. However, for practical application further improvement of these materials is required.…”

Section: Introductionmentioning

confidence: 99%

In situ X-ray Raman spectroscopy study of the hydrogen sorption properties of lithium borohydride nanocomposites

Miedema

Ngene

Eerden

et al. 2014

Phys. Chem. Chem. Phys.

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Nanoconfined alkali metal borohydrides are promising materials for reversible hydrogen storage applications, but the characterization of hydrogen sorption in these materials is difficult. Here we show that with in situ X-ray Raman spectroscopy (XRS) we can track the relative amounts of intermediates and final products formed during de-and re-hydrogenation of nanoconfined lithium borohydride (LiBH 4 ) and therefore we can possibly identify the de-and re-hydrogenation pathways. In the XRS of nanoconfined LiBH 4 at different points in the de-and re-hydrogenation, we identified phases that lead to the conclusion that de-and re-hydrogenation pathways in nanoconfined LiBH 4 are different from bulk LiBH 4 : intercalated lithium (LiC x ), boron and lithium hydride were formed during de-hydrogenation, but as well Li 2 B 12 H 12 was observed indicating that there is possibly some bulk LiBH 4 present in the nanoconfined sample LiBH 4 -C as prepared.Surprisingly, XRS revealed that the de-hydrogenated products of the LiBH 4 -C nanocomposites can be partially rehydrogenated to about 90% of Li 2 B 12 H 12 and 2-5% of LiBH 4 at a mild condition of 1 bar H 2 and 350 1C. This suggests that re-hydrogenation occurs via the formation of Li 2 B 12 H 12 . Our results show that XRS is an elegant technique that can be used for in and ex situ study of the hydrogen sorption properties of nanoconfined and bulk light-weight metal hydrides in energy storage applications.

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Modified Lithium Borohydrides for Reversible Hydrogen Storage (2)

Cited by 141 publications

References 9 publications

The effects of Ti-based additives on the kinetics and reactions in LiH/MgB2 hydrogen storage system

The effects of Ti-based additives on the kinetics and reactions in LiH/MgB2 hydrogen storage system

Recent Progress in Metal Borohydrides for Hydrogen Storage

In situ X-ray Raman spectroscopy study of the hydrogen sorption properties of lithium borohydride nanocomposites

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