Extreme high reversible capacity with over 8.0 wt% and excellent hydrogen storage properties of MgH2 combined with LiBH4 and Li3AlH6

Lin, Wenping; Xiao, Xuezhang; Wang, Xuancheng; Wong, Jie-Wei; Yao, Zhendong; Chen, Man; Zheng, Jiaguang; Hu, Zhencan; Chen, Lixin

doi:10.1016/j.jechem.2020.03.076

Cited by 36 publications

(10 citation statements)

References 73 publications

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“…More than 8.0 wt % reversible hydrogen capacity was achieved. 55 The 2LiBH 4 −Li 3 AlH 6 composites were demonstrated to have better dehydrogenation properties than 2LiBH 4 −LiAlH 4 and 2LiBH 4 −Al composites. About 9.1 wt % hydrogen was released during its dehydrogenation processes.…”

Section: Metal Borohydridesmentioning

confidence: 92%

“…The MgH 2 –Li 3 AlH 6 –LiBH 4 composites were demonstrated to start to release hydrogen at 276 °C and be completely dehydrogenated at 360 °C. More than 8.0 wt % reversible hydrogen capacity was achieved . The 2LiBH 4 –Li 3 AlH 6 composites were demonstrated to have better dehydrogenation properties than 2LiBH 4 –LiAlH 4 and 2LiBH 4 –Al composites.…”

Section: Metal Borohydridesmentioning

confidence: 96%

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A Review of High Density Solid Hydrogen Storage Materials by Pyrolysis for Promising Mobile Applications

Huang

Cheng

Zhang

2021

Ind. Eng. Chem. Res.

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Hydrogen is one of the cleanest energies with potential to have zero carbon emission. Hydrogen storage is a challenging phase for the hydrogen energy application. The safety, cost, and transportation of compressed and liquified hydrogen hinder the widespread application of hydrogen energy. Chemical absorption of hydrogen in solid hydrogen storage materials is a promising hydrogen storage method due to its high storage and transportation performance. Hydrogen storage density, dehydrogenation temperature, and dehydrogenation dynamics are the main challenges for the hydrogen storage materials. The ultimate goal of the system gravimetric capacity was set by the Department of Energy to be 6.5 wt % with a working temperature from −40 to 60 °C. The theoretical densities of most present hydrogen storage materials are even lower than 6.5 wt %, which make it impossible to reach the system gravimetric capacity goal. Only hydrogen storage materials with high theoretical density (≥10 wt %) with further modification have the possibility to reach the goal. However, most of the reviews focus on the research progress of general hydrogen storage materials investigated, many of which have low density. Hydrogen storage materials with high theoretical density including metal borohydrides, metal alanates, ammonia borane, metal amides, and amine metal borohydrides have been reviewed in this article. The pyrolysis and hydrogen absorption conditions of the hydrogen storage materials have been summarized, especially the improvements of the hydrogen storage materials. Furthermore, the challenges of the hydrogen storage materials have been pointed out. Potential hydrogen storage materials and possible modification methods have also been presented and discussed.

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Section: Metal Borohydridesmentioning

confidence: 92%

Section: Metal Borohydridesmentioning

confidence: 96%

A Review of High Density Solid Hydrogen Storage Materials by Pyrolysis for Promising Mobile Applications

Huang

Cheng

Zhang

2021

Ind. Eng. Chem. Res.

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“…At present, the improvement of the hydrogen storage performance of MgH 2 is largely categorized into four aspects: nanoconfining, , alloying, − compositing, , and catalyst addition. − Among them, the improvement of the hydrogen storage performance of MgH 2 by employing transition-metal-based catalysts has considerable attention. It was found that the addition of transition-metal-based catalysts can reduce the dissociation energy of hydrogen molecules on the metal surface of Mg/MgH 2 , significantly improving its hydrogen adsorption kinetics. , Furthermore, theoretical studies showed that the interaction between H 1s electron and the transition metal’s unsaturated d electrons can weaken the Mg–H bond’s binding strength in MgH 2 , improving its dehydrogenation performance. , …”

Section: Introductionmentioning

confidence: 99%

Synergistic Effect of a Facilely Synthesized MnV₂O₆ Catalyst on Improving the Low-Temperature Kinetic Properties of MgH₂

et al. 2022

ACS Appl. Mater. Interfaces

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While magnesium hydride (MgH2) has drawn considerable attention as a promising hydrogen storage material, it suffers from sluggish kinetics and high desorption temperature, hindering potential applications. Herein, we show that the hydrogen desorption kinetics of MgH2 can be significantly improved using bimetallic oxide MnV2O6 as the catalyst. A MgH2–MnV2O6 composite was prepared by a high-energy ball milling method. The results showed that the MgH2–MnV2O6 composite can release 5.57 wt % hydrogen within 10 min under 250 °C. The dehydrogenated MgH2–MnV2O6 sample can absorb 3.09 wt % hydrogen within 10 min under 50 °C. Notably, the reversible hydrogen storage property did not degrade at least within 100 cycles, showing excellent cycle stability. X-ray diffraction and transmittance electron microscopy measurements revealed that MnV alloy and V2O3 phases were formed during the ball milling process, leading to the synergistic catalytic effect. We argue that the bimetallic MnV alloy plays key catalytic roles in this system because MnV alloy can promote the fracture of the H–H and Mg–H bonds, significantly improving the hydrogen storage kinetics and low-temperature reversible hydrogen storage performance of MgH2.

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“…In order to overcome these limitations, several approaches have been applied such as nanoconfinement, addition of transition metals, destabilization through different complexes and binary hydrides addition [17][18][19][20][21]. Among them, the so-called Reactive Hydride Composite (RHC) approach has been one of the most effective methods with potential for a practical application owing to its suitable hydrogen storage properties [9,17].…”

Section: Introductionmentioning

confidence: 99%

Modeling the kinetic behavior of the Li-RHC system for energy-hydrogen storage: (I) absorption

Neves

Puszkiel

Capurso

et al. 2021

International Journal of Hydrogen Energy

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The Lithium-Boron Reactive Hydride Composite System (Li-RHC) (2 LiH + MgB2 / 2 LiBH4 + MgH2) is a high-temperature hydrogen storage material suitable for energy storage applications. Herein, a comprehensive gas-solid kinetic model for hydrogenation is developed. Based on thermodynamic measurements under absorption conditions, the system's enthalpy ∆H and entropy ∆S are determined to amount to -34 ± 2 kJ•mol H2 -1 and -70 ± 3 J•K -1 •mol H2 -1 , respectively. Based on the thermodynamic behavior assessment, the kinetic measurements' conditions are set in the range between 325 °C and 412 °C, as well as between 15 bar and 50 bar. The kinetic analysis shows that the hydrogenation rate-limiting-step is related to a onedimensional interface-controlled reaction with a driving-force-corrected apparent activation energy of 146 ± 3 kJ•mol H2 -1 . Applying the kinetic model, the dependence of the reaction rate constant as a function of pressure and temperature is calculated, allowing the design of optimized hydrogen/energy storage vessels via finite element method (FEM) simulations.

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Extreme high reversible capacity with over 8.0 wt% and excellent hydrogen storage properties of MgH2 combined with LiBH4 and Li3AlH6

Cited by 36 publications

References 73 publications

A Review of High Density Solid Hydrogen Storage Materials by Pyrolysis for Promising Mobile Applications

A Review of High Density Solid Hydrogen Storage Materials by Pyrolysis for Promising Mobile Applications

Synergistic Effect of a Facilely Synthesized MnV₂O₆ Catalyst on Improving the Low-Temperature Kinetic Properties of MgH₂

Modeling the kinetic behavior of the Li-RHC system for energy-hydrogen storage: (I) absorption

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Extreme high reversible capacity with over 8.0 wt% and excellent hydrogen storage properties of MgH2 combined with LiBH4 and Li3AlH6

Cited by 36 publications

References 73 publications

A Review of High Density Solid Hydrogen Storage Materials by Pyrolysis for Promising Mobile Applications

A Review of High Density Solid Hydrogen Storage Materials by Pyrolysis for Promising Mobile Applications

Synergistic Effect of a Facilely Synthesized MnV2O6 Catalyst on Improving the Low-Temperature Kinetic Properties of MgH2

Modeling the kinetic behavior of the Li-RHC system for energy-hydrogen storage: (I) absorption

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Synergistic Effect of a Facilely Synthesized MnV₂O₆ Catalyst on Improving the Low-Temperature Kinetic Properties of MgH₂