Aluminum hydride for solid-state hydrogen storage: Structure, synthesis, thermodynamics, kinetics, and regeneration

Liu, Haizhen; Zhang, Longfei; Ma, Hongyu; Lu, Chenglin; Luo, Hui; Wang, Xinhua; Huang, Xiantun; Lan, Zhiqiang; Guo, Jin

doi:10.1016/j.jechem.2020.02.008

Cited by 64 publications

(29 citation statements)

References 136 publications

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“…This indicates that the formation of

surface oxide can improve its stability. The enthalpy of dehydrogenation of

determined by DSC (Differential Scanning Calorimetry) is 5.7–6.6 kJ/mol of H 2 [ 66 ]. Therefore, AlH 3 is easy to release hydrogen at elevated temperatures.…”

Section: Stabilitymentioning

confidence: 99%

Synthesis and Stability of Hydrogen Storage Material Aluminum Hydride

Zhao

et al. 2021

Materials

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Aluminum hydride (AlH3) is a binary metal hydride with a mass hydrogen density of more than 10% and bulk hydrogen density of 148 kg H2/m3. Pure aluminum hydride can easily release hydrogen when heated. Due to the high hydrogen density and low decomposition temperature, aluminum hydride has become one of the most promising hydrogen storage media for wide applications, including fuel cell, reducing agents, and rocket fuel additive. Compared with aluminum powder, AlH3 has a higher energy density, which can significantly reduce the ignition temperature and produce H2 fuel in the combustion process, thus reducing the relative mass of combustion products. In this paper, the research progress about the structure, synthesis, and stability of aluminum hydride in recent decades is reviewed. We also put forward the challenges for application of AlH3 and outlook the possible opportunity for AlH3 in the future.

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“…This indicates that the formation of

surface oxide can improve its stability. The enthalpy of dehydrogenation of

determined by DSC (Differential Scanning Calorimetry) is 5.7–6.6 kJ/mol of H 2 [ 66 ]. Therefore, AlH 3 is easy to release hydrogen at elevated temperatures.…”

Section: Stabilitymentioning

confidence: 99%

Synthesis and Stability of Hydrogen Storage Material Aluminum Hydride

Zhao

et al. 2021

Materials

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“…The development of hydrogen storage with excellent performance as well as high hydrogen-carrying capacity is crucial for applications of solid-state hydrogen storage. [3][4][5][6] Currently, metal hydrides and light complex hydrides are considered promising ways to store hydrogen in a solidstate form. [7][8][9][10][11][12] Sodium alanate (NaAlH 4 ) is often investigated as a solid-state hydrogen storage material owing to its reasonable cost and high theoretical hydrogen capacity.…”

Section: Introductionmentioning

confidence: 99%

“…Hydrogen may be stored in three forms: liquid, gaseous and solid‐state forms. The development of hydrogen storage with excellent performance as well as high hydrogen‐carrying capacity is crucial for applications of solid‐state hydrogen storage 3‐6 . Currently, metal hydrides and light complex hydrides are considered promising ways to store hydrogen in a solid‐state form 7‐12 .…”

Section: Introductionmentioning

confidence: 99%

Enhanced dehydrogenation performance ofNaAlH₄by the addition of sphericalSrTiO₃

et al. 2021

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Sluggish sorption kinetics, high decomposition temperature and unsatisfactory cycles of hydrogen release and uptake (reversibility) remain big challenges for using sodium alanate (NaAlH 4 ) as a practical hydrogen storage medium. In solid-state hydrogen storage materials, especially NaAlH 4 , finding effective catalysts and using mechanical treatment represent promising solutions to overcome the drawbacks of NaAlH 4 . For the first time, in this work, the influence of spherical strontium titanate (SrTiO 3 ) on the dehydrogenation behavior of NaAlH 4 has been investigated. Here, we report that the onset desorption temperature is decreased and the desorption kinetics of NaAlH 4 is enhanced with the addition of 10 wt% of spherical SrTiO 3 catalyst. Using Kissinger's technique, the apparent activation energy of the NaAlH 4 doped with 10 wt% SrTiO 3 composites for the two-step dehydrogenation was identified as 79 and 92 kJ/mol, which was decreased significantly from that of undoped NaAlH 4 (116 and 122 kJ/mol, respectively). Scanning electron microscopy results indicated that the NaAlH 4 particle sizes decreased by milling with SrTiO 3 . X-ray diffraction results indicated that SrTiO 3 did not react or change during the milling and desorption (heating) processes. The improvements in the desorption properties of NaAlH 4 resulted from the ability of SrTiO 3 to reduce the physical structure of the NaAlH 4 during the ball milling process.

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“…However, the unfavorably high thermal stability and sluggish dehydrogenation kinetics significantly limit its practical application (Luo et al, 2019;Zhang et al, 2020a). Many attempts have been carried out to improve the dehydrogenation and rehydrogeantion properties of MgH 2 , including alloying (Hardian et al, 2018;Hui et al, 2020;Ali and Ismail, 2021), nanoengineering (Zhang et al, 2020a;Zhang et al, 2021c;Thi Thu et al, 2021), and catalyst addition (Zhong et al, 2018;Li et al, 2019b;Liu et al, 2020b;Zhang et al, 2020b;Ding et al, 2020;Singh et al, 2020;Sun et al, 2020;Wang and Deng, 2020;Yao et al, 2020;Zeng et al, 2020;Zhu et al, 2020;Lu et al, 2021a;Lu et al, 2021b;Liu et al, 2021c;, etc. Li is also a H-absorbing metal and has a hydrogen capacity of 11.5 wt.%.…”

Section: Introductionmentioning

confidence: 99%

Co-Addition of Mg2Si and Graphene for Synergistically Improving the Hydrogen Storage Properties of Mg−Li Alloy

et al. 2021

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Mg−Li alloy possesses a high hydrogen capacity. However, the hydrogenation and dehydrogenation performances are still far from practical application. In this work, Mg2Si (MS) and graphene (G) were employed together to synergistically improve the hydrogen storage properties of Mg−Li alloy. The structures of the samples were studied by XRD and SEM methods. The hydrogen storage performances of the samples were studied by nonisothermal and isothermal hydrogenation and dehydrogenation, thermal analysis, respectively. It is shown that the onset dehydrogenation temperature of Mg−Li alloy was synergistically reduced from 360°C to 310°C after co-addition of Mg2Si and graphene. At a constant temperature of 325°C, the Mg−Li−MS−G composite can release 2.7 wt.% of hydrogen within 2 h, while only 0.2 wt.% of hydrogen is released for the undoped Mg−Li alloy. The hydrogenation activation energy of the Mg−Li−MS−G composite was calculated to be 86.5 kJ mol−1. Microstructure and hydrogen storage properties studies show that graphene can act as a grinding aid during the ball milling process, which leads to a smaller particle size for the composites. This work demonstrates that coaddition of Mg2Si and graphene can synergistically improve the hydrogen storage properties of Mg−Si alloy and offers an insight into the role of graphene in the Mg−Li−MS−G composite.

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Aluminum hydride for solid-state hydrogen storage: Structure, synthesis, thermodynamics, kinetics, and regeneration

Cited by 64 publications

References 136 publications

Synthesis and Stability of Hydrogen Storage Material Aluminum Hydride

Synthesis and Stability of Hydrogen Storage Material Aluminum Hydride

Enhanced dehydrogenation performance ofNaAlH₄by the addition of sphericalSrTiO₃

Co-Addition of Mg2Si and Graphene for Synergistically Improving the Hydrogen Storage Properties of Mg−Li Alloy

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Aluminum hydride for solid-state hydrogen storage: Structure, synthesis, thermodynamics, kinetics, and regeneration

Cited by 64 publications

References 136 publications

Synthesis and Stability of Hydrogen Storage Material Aluminum Hydride

Synthesis and Stability of Hydrogen Storage Material Aluminum Hydride

Enhanced dehydrogenation performance ofNaAlH4by the addition of sphericalSrTiO3

Co-Addition of Mg2Si and Graphene for Synergistically Improving the Hydrogen Storage Properties of Mg−Li Alloy

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Enhanced dehydrogenation performance ofNaAlH₄by the addition of sphericalSrTiO₃