On the reversibility of hydrogen storage in Ti- and Nb-catalyzed Ca(BH4)2

Kim, Jae‐Hun; Shim, Jaesool; Cho, Young Whan

doi:10.1016/j.jpowsour.2008.02.094

Cited by 97 publications

(121 citation statements)

References 37 publications

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“…Table 2 The crystal structures and the lattice parameters of the refined structures in Figure 2. Solid solutions of CaH 2-x F x in the cubic CaF 2 crystal structure with various concentrations of hydrogen have previously been reported, first by Brice et al [63] and more recently in connection with research on Ca(BH 4 ) 2 thermal decomposition [64,65]. Smithson et al [66] have performed ab-initio calculations that show that at zero pressure, the formation energies for orthorhombic CaH 2 and cubic CaH 2 are very similar.…”

Section: Cah 2 Formationmentioning

confidence: 97%

Ionic conductivity and the formation of cubic CaH2 in the LiBH4–Ca(BH4)2 composite

Sveinbjörnsson

Blanchard

Mýrdal

et al. 2014

Journal of Solid State Chemistry

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Section: Cah 2 Formationmentioning

confidence: 97%

Ionic conductivity and the formation of cubic CaH2 in the LiBH4–Ca(BH4)2 composite

Sveinbjörnsson

Blanchard

Mýrdal

et al. 2014

Journal of Solid State Chemistry

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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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“…The formation of Ca(BH 4 ) 2 was shown to be partially reversible when the pristine material was doped with Ti and Nb-based additives. Kim et al [190,191] observed that after desorption at 420 • C in static vacuum, Ca(BH 4 ) 2 can be formed back with a yield of roughly 50% (at 350 • C and 90 bar H 2 ), if the starting material is milled together with TiCl 3 and NbF 5 . From these works, it is possible to conclude that the key to the reversibility of Ca(BH 4 ) 2 is the formation of CaB 6 .…”

Section: Ca(bh 4 )mentioning

confidence: 99%

Tetrahydroborates: Development and Potential as Hydrogen Storage Medium

et al. 2017

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Abstract:The use of fossil fuels as an energy supply becomes increasingly problematic from the point of view of both environmental emissions and energy sustainability. As an alternative, hydrogen is widely regarded as a key element for a potential energy solution. However, differently from fossil fuels such as oil, gas, and coal, the production of hydrogen requires energy. Alternative and intermittent renewable energy sources such as solar power, wind power, etc., present multiple advantages for the production of hydrogen. On the one hand, the renewable sources contribute to a remarkable reduction of pollutants released to the air and on the other hand, they significantly enhance the sustainability of energy supply. In addition, the storage of energy in form of hydrogen has a huge potential to balance an effective and synergetic utilization of renewable energy sources. In this regard, hydrogen storage technology is a key technology towards the practical application of hydrogen as "energy carrier". Among the methods available to store hydrogen, solid-state storage is the most attractive alternative from both the safety and the volumetric energy density points of view. Because of their appealing hydrogen content, complex hydrides and complex hydride-based systems have attracted considerable attention as potential energy vectors for mobile and stationary applications. In this review, the progresses made over the last century on the synthesis and development of tetrahydroborates and tetrahydroborate-based systems for hydrogen storage purposes are summarized.

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On the reversibility of hydrogen storage in Ti- and Nb-catalyzed Ca(BH4)2

Cited by 97 publications

References 37 publications

Ionic conductivity and the formation of cubic CaH2 in the LiBH4–Ca(BH4)2 composite

Ionic conductivity and the formation of cubic CaH2 in the LiBH4–Ca(BH4)2 composite

Recent Progress in Metal Borohydrides for Hydrogen Storage

Tetrahydroborates: Development and Potential as Hydrogen Storage Medium

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