Nanoconfinement significantly improves the thermodynamics and kinetics of co-infiltrated 2LiBH4–LiAlH4 composites: Stable reversibility of hydrogen absorption/resorption

Xia, Guanglin; Meng, Qing Guo; Guo, Zaiping; Gu, Qinfen; Liu, Huan; Liu, Zongwen; Yu, Xuebin

doi:10.1016/j.actamat.2013.07.066

Cited by 31 publications

(23 citation statements)

References 72 publications

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“…Infiltration into mesoporous carbon materials has been achieved, and hydrogen was released at temperatures clearly lower than for any of the separate complex metal hydrides (Fig. 5 [145]. In all cases, hydrogen release Fig.…”

Section: Strategies To Prepare Nanoconfined Materialsmentioning

confidence: 87%

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: Strategies To Prepare Nanoconfined Materialsmentioning

confidence: 87%

Complex and liquid hydrides for energy storage

et al. 2016

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“…Nevertheless, these nanoconfined samples especially in carbon aerogel scaffold still could not fulfill the requirement of practical uses as onboard hydrogen storage due to their high operating pressure and temperature for de-/rehydrogenation. For example, nanoconfined 2LiBH 4 eMgH 2 could be decomposed with reasonable kinetics at 425e450 C under 3e4 bar H 2 and successfully rehydrogenated at 390e425 C under 100e130 bar H 2 [27,28], while nanoconfined 2LiBH 4 eLiAlH 4 required T ¼ 500 C and P(H 2 ) ¼ 100 bar for rehydrogenation [35].…”

Section: Introductionmentioning

confidence: 99%

“…LiBH 4 nanoconfined into several hosts, such as carbon aerogel scaffold [21e23], poly(methyl methacrylate) [24,25], activated carbon nanofiber [26], via both direct melt infiltration and solution impregnation have been proposed. Moreover, various RHCs of LiBH 4 with other hydrides nanoconfined into carbon aerogel scaffold (e.g., LiBH 4 eMgH 2 [27e31], LiBH 4 eNaAlH 4 [32], LiBH 4 eMg(BH 4 ) 2 [33,34], and 2LiBH 4 eLiAlH 4 [35]) have been remarkably of interest. Nanoconfinement of both LiBH 4 and its RHCs provided significant improvement in dehydrogenation kinetics, suppression of toxic diborane (B 2 H 6 ) gas release, and mild temperature and pressure conditions for rehydrogenation as compared with bulk materials.…”

Section: Introductionmentioning

confidence: 99%

Confined LiBH4–LiAlH4 in nanopores of activated carbon nanofibers

Plerdsranoy

Utke

2015

International Journal of Hydrogen Energy

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“…A few studies have been conducted on attempting to enhance the kinetics and reduce the temperature for hydrogen desorption of similar complex binary eutectic borohydride systems, by introducing carbon scaffolds. Several systems explore the properties of binary complex hydrides for nanoconfinement such as LiBH 4 eCa(BH 4 )2 [8,21e23], LiBH 4 eMg 2 NiH 4 [24], LiBH 4 eMg(BH 4 ) 2 [11e13,25], LiBH 4 eLiAlH 4 [26] and LiBH 4 eNaAlH 4 [27]. These systems all form eutectic melts when mixed together which makes them suitable for infiltration into porous scaffolds.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen storage properties of nanoconfined LiBH 4 –NaBH 4

Javadian

Sheppard

Buckley

2015

International Journal of Hydrogen Energy

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Eutectic melting compositeCarbon dioxide activation Cyclic stability a b s t r a c tIn this study a eutectic melting composite of 0.62LiBH 4 e0.38NaBH 4 has been infiltrated in two nanoporous resorcinol formaldehyde carbon aerogel scaffolds with similar pore sizes (37 and 38 nm) but different BET surface areas (690 and 2358 m 2 /g) and pore volumes (1.03 and 2.64 mL/g). This investigation clearly shows decreased temperature of hydrogen desorption, and improved cycling stability during hydrogen release and uptake of bulk 0.62LiBH 4 e0.38NaBH 4 when nanoconfined into carbon nanopores. The hydrogen desorption temperature of bulk 0.62LiBH 4 e0.38NaBH 4 is reduced by~107 C with the presence of carbon, although a minor kinetic variation is observed between the two carbon scaffolds.This corresponds to apparent activation energies, E A , of 139 kJ mol À1 (bulk) and 116 e118 kJ mol À1 (with carbon aerogel). Bulk 0.62LiBH 4 e0.38NaBH 4 has poor reversibility during continuous hydrogen release and uptake cycling, maintaining 22% H 2 capacity after four hydrogen desorptions (1.6 wt.% H 2 ). In contrast, nanoconfinement into the high surface area carbon aerogel scaffold significantly stabilizes the hydrogen storage capacity, maintaining~70% of the initial capacity after four cycles (4.3 wt.% H 2 ).

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Nanoconfinement significantly improves the thermodynamics and kinetics of co-infiltrated 2LiBH4–LiAlH4 composites: Stable reversibility of hydrogen absorption/resorption

Cited by 31 publications

References 72 publications

Complex and liquid hydrides for energy storage

Complex and liquid hydrides for energy storage

Confined LiBH4–LiAlH4 in nanopores of activated carbon nanofibers

Hydrogen storage properties of nanoconfined LiBH 4 –NaBH 4

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