Synthesis of LiAlH4 Nanoparticles Leading to a Single Hydrogen Release Step upon Ti Coating

Wang, Lei; Aguey‐Zinsou, Kondo‐François

doi:10.3390/inorganics5020038

Cited by 24 publications

(19 citation statements)

References 46 publications

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“…In the case of LiAlH 4 , the improved desorption kinetics was reported by the doping of Ti catalyst using mechanically milling [10][11][12]. Recent study also reported a single step hydrogen release of LiAlH 4 , which was induced by the synergetic effects of Ti catalytic coating and nanosizing effects [13]. Although the rehydrogenation of the desorbed material was not achieved in the milled sample, the regeneration of LiAlH 4 from LiH and Ti-catalyzed Al was possible through the solution synthesis approach using THF and Me 2 O [14][15][16].…”

Section: Introductionmentioning

confidence: 95%

Unique Hydrogen Desorption Properties of LiAlH4/h-BN Composites

et al. 2017

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Hexagonal boron nitride (h-BN) is known as an effective additive to improve the hydrogen de/absorption properties of hydrogen storage materials consisting of light elements. Herein, we report the unique hydrogen desorption properties of LiAlH 4 /h-BN composites, which were prepared by ball-milling. The desorption profiles of the composite indicated the decrease of melting temperature of LiAlH 4 , the delay of desorption kinetics in the first step, and the enhancement of the kinetics in the second step, compared with milled LiAlH 4 . Li 3 AlH 6 was also formed in the composite after desorption in the first step, suggesting h-BN would have a catalytic effect on the desorption kinetics of Li 3 AlH 6 . Finally, the role of h-BN on the desorption process of LiAlH 4 was discussed by comparison with the desorption properties of LiAlH 4 /X (X = graphite, LiCl and LiI) composites, suggesting the enhancement of Li ion mobility in the LiAlH 4 /h-BN composite.

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Section: Introductionmentioning

confidence: 95%

Unique Hydrogen Desorption Properties of LiAlH4/h-BN Composites

et al. 2017

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“…However, its practical use is hindered by the poor reversibility and excessive temperature required for hydrogen release. 11 One of the problems is to stabilize the hydride nanoparticles, being the use of surfactants in the synthesis of LiBH4, 12,13 an alternative, but with little support and divulgation. Alanates, borohydrides, and amides are complex hydrides with high concentrations of hydrogen that have been actively investigated for materials-based hydrogen storage.…”

Section: Introductionmentioning

confidence: 99%

H ₂ storage using Zr‐CMK ‐3 developed by a new synthesis method

Juárez

Venosta

Anunziata

et al. 2021

Intl J of Energy Research

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One of the biggest problems in using hydrogen as an alternative fuel is that its storage must be safe and portable. This work addresses a new direct synthesis technique used to obtain a novel mesoporous carbon (CMK-3) modified with zirconium oxide. This novel material shows promise for hydrogen adsorption and storage application for energy harvesting. Zirconium oxide (Zr-CMK-3) material is achieved through successful synthesis and characterized by XRD, SEM, Raman, BET, UV-Vis-DRS, XPS and TEM analyses. Zr-CMK-3 significantly improved H 2 storage performance (reaching at 77 K and 10 bar 4.6 wt%) compared to the pristine CMK-3. The novel material is favorable for H 2 uptake by using weak bonding (physisorption). A hydrogen uptake mechanistic approach is proposed and the role of the Zr +4 cation in hydrogen adsorption is discussed.

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“…The H 2 absorption/desorption kinetics of alanates have been improved by the addition of a small amount of Ti species, and the catalytic mechanism has been discussed. 13,14 In recent years, boron nitride addition has been reported as one of the strategies to improve the absorption/desorption properties of complex hydrides. For instance, remarkable absorption/desorption properties have been achieved in LiBH 4 /BN composites, probably because of the enhancement of H 2 dissociation, H − diffusion, and Li + diffusion by nanoscale BN.…”

Section: Introductionmentioning

confidence: 99%

Effects of Defective Boron Nitride Additives on Lithium-Ion Conductivity and Hydrogen-Desorption Properties of LiAlH₄

et al. 2020

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The lithium-ion conductivity and hydrogen-desorption properties of lithium alanate (LiAlH 4 )/boron nitride (BN) composites were investigated. The effects of boron nitrides with different structures (hexagonal (h-BN), turbostratic (t-BN), and cubic (c-BN)) on the properties were demonstrated. Compared with milled LiAlH 4 , the ion conductivity was improved in the h-BN and t-BN composites. Among the composites, the t-BN composite showed the highest conductivity and lowest activation energy (E a ) for ion conduction. In the 40 wt % t-BN composite, the conductivity at 80 °C reached as high as 1.1 × 10 −3 S cm −1 . Impedance plots that correspond to the interfacial conductivity were observed, which implies the appearance of LiAlH 4 /t-BN interfacial ion conduction. Ball-milling of LiAlH 4 with BN caused the partial replacement of aluminum with boron to form LiBH 4 phase, which would cause the E a decrease. The LiAlH 4 melting and hydrogen-desorption temperature decreased in the t-BN composite. In the c-BN composite, a large amount of stainless steel impurity during ball-milling caused desorption without melting. This study suggests that the addition of defective boron nitride like t-BN can be a useful strategy to improve the lithium-ion conductivity of complex hydrides. The t-BN additive effects on the hydrogen-desorption properties, which are different from transition metal catalysts, were also demonstrated.

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Synthesis of LiAlH4 Nanoparticles Leading to a Single Hydrogen Release Step upon Ti Coating

Cited by 24 publications

References 46 publications

Unique Hydrogen Desorption Properties of LiAlH4/h-BN Composites

Unique Hydrogen Desorption Properties of LiAlH4/h-BN Composites

H ₂ storage using Zr‐CMK ‐3 developed by a new synthesis method

Effects of Defective Boron Nitride Additives on Lithium-Ion Conductivity and Hydrogen-Desorption Properties of LiAlH₄

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Synthesis of LiAlH4 Nanoparticles Leading to a Single Hydrogen Release Step upon Ti Coating

Cited by 24 publications

References 46 publications

Unique Hydrogen Desorption Properties of LiAlH4/h-BN Composites

Unique Hydrogen Desorption Properties of LiAlH4/h-BN Composites

H 2 storage using Zr‐CMK ‐3 developed by a new synthesis method

Effects of Defective Boron Nitride Additives on Lithium-Ion Conductivity and Hydrogen-Desorption Properties of LiAlH4

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Product

Resources

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H ₂ storage using Zr‐CMK ‐3 developed by a new synthesis method

Effects of Defective Boron Nitride Additives on Lithium-Ion Conductivity and Hydrogen-Desorption Properties of LiAlH₄