Kinetic- and thermodynamic-based improvements of lithium borohydride incorporated into activated carbon

Fang, Zheng; Wang, Ping; Rufford, Thomas E.; Kang, Xiangdong; Lu, Gao Qing; Cheng, Hui‐Ming

doi:10.1016/j.actamat.2008.08.033

Cited by 133 publications

(123 citation statements)

References 31 publications

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“…The nanosized LiBH 4 desorbs 3.4 wt% H 2 in 90 min at 300°C under 0.1 MPa H 2 pressure, while the physical mixture only desorbs 0.3 wt%. The enhanced kinetics for the hydrogen release are in good agreement with those reported by other authors for similar systems [81][82][83].…”

Section: Nanoporous Carbonsupporting

confidence: 92%

Thermodynamics study of hydrogen storage materials

Song

Wang

Jiao

et al. 2012

The Journal of Chemical Thermodynamics

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Section: Nanoporous Carbonsupporting

confidence: 92%

Thermodynamics study of hydrogen storage materials

Song

Wang

Jiao

et al. 2012

The Journal of Chemical Thermodynamics

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“…It was first applied in the NH 3 BH 3 system [211] and good improvement was obtained: The dehydrogenation temperature was largely decreased and the amount of borazine gas (an impurity) was significantly reduced. Recently, this approach was introduced for M(BH 4 ) n materials, and some recent achievements [160,[212][213][214][215][216][217][218][219][220][221][222] are summarized in Table 6.…”

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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“…For the LiBH 4 , only very weak diffraction lines were seen after melt infiltration (spectrum c) indicating that the material is not crystalline, and most likely confined in the nanopores. 7 Nitrogen physisorption (Fig. S1 in supporting information †) shows that the carbon pore volume drastically reduced after melt infiltration due to incorporation of LiBH 4 into the pores.…”

Section: Bulk Characterizationmentioning

confidence: 99%

“…Nanosizing/nanoconfinement in porous materials such as carbon, [5][6][7][8][9][10] and the use of catalysts, [11][12][13][14][15][16][17] are among the strategies being explored to improve the dehydrogenation and rehydrogenation behaviour. These approaches have been shown to be effective for several hydrides such as NH 3 BH 3 18 and NaAlH 4 .…”

Section: Introductionmentioning

confidence: 99%

The role of Ni in increasing the reversibility of the hydrogen release from nanoconfined LiBH4

Ngene

Verkuijlen²,

Zheng

et al. 2011

Faraday Discuss.

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Nanoconfinement and the use of catalysts are promising strategies to enhance the reversibility of hydrogen storage in light metal hydrides. We combined nanoconfinement of LiBH 4 in nanoporous carbon with the addition of Ni. Samples were prepared by deposition of 5-6 nm Ni nanoparticles inside the porous carbon, followed by melt infiltration with LiBH 4 . The Ni addition has only a slight influence on the LiBH 4 hydrogen desorption, but significantly enhances the subsequent uptake of hydrogen under mild conditions. Reversible, but limited, intercalation of Li is observed during hydrogen cycling. X-ray diffraction shows that the initial crystalline 5-6 nm Ni nanoparticles are not present anymore after melt infiltration with LiBH 4 . However, transmission electron microscopy showed Ni-containing nanoparticles in the samples. Extended X-ray absorption fine structure spectroscopy proved the presence of Ni x B phases with the Ni-B coordination numbers changing reversibly with dehydrogenation and rehydrogenation of the sample. Ni x B can act as a hydrogenation catalyst, but solid-state 11 B NMR proved that the addition of Ni also enhanced the reversibility of the system by influencing the microstructure of the nanoconfined LiBH 4 upon cycling.

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Kinetic- and thermodynamic-based improvements of lithium borohydride incorporated into activated carbon

Cited by 133 publications

References 31 publications

Thermodynamics study of hydrogen storage materials

Thermodynamics study of hydrogen storage materials

Recent Progress in Metal Borohydrides for Hydrogen Storage

The role of Ni in increasing the reversibility of the hydrogen release from nanoconfined LiBH4

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