The kinetics of lightweight solid-state hydrogen storage materials: A review

Khafidz, Nurul Zafirah Abd.Khalim; Yaakob, Zahira; Lim, Kean Long; Timmiati, Sharifah Najiha

doi:10.1016/j.ijhydene.2016.05.169

Cited by 122 publications

(20 citation statements)

References 203 publications

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“…Introduction of suitable dopants is also an effective approach to improve the hydrogen storage properties of lightweight metal alanates systems. An extensive variety of dopants, such as transition metals, rare-earth metals, carbon materials and co-dopants additives, have been surveyed during the last two decades [183,[215][216][217]. Several doping strategies, such as wet doping and highenergy ball milling have been presented for the preparation of additive-doped lightweight metal alanates.…”

Section: Adding Dopantsmentioning

confidence: 99%

Lightweight hydrides nanocomposites for hydrogen storage: Challenges, progress and prospects

Huang

et al. 2019

Sci. China Mater.

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As typical high-capacity complex hydrides, lightweight hydrides have attracted intensive attention due to their high gravimetric and volumetric energy densities of hydrogen storage. However, lightweight hydrides also have high thermodynamic stability and poor kinetics, so they ususally require high hydrogen desorption temperature and show inferior reversibility under mild conditions. This review summarizes recent progresses on the endeavor of overcoming thermodynamic and kinetic challenges for Mg based hydrides, lightweight metal borohydrides and alanates. First, the current state, advantages and challenges for Mg-based hydrides and lightweight metal hydrides are introduced. Then, alloying, nanoscaling and appropriate doping techniques are demonstrated to decrease the hydrogen desorption temperature and promote the reversibility behavior in lightweight hydrides. Selected scaffolds materials, approaches for synthesis of nanoconfined systems and hydriding-dehydriding properties are reviewed. In addition, the evolution of various dopants and their effects on the hydrogen storage properties of lightweight hydrides are investigated, and the relevant catalytic mechanisms are summarized. Finally, the remaining challenges and the sustainable research efforts are discussed.

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Section: Adding Dopantsmentioning

confidence: 99%

Lightweight hydrides nanocomposites for hydrogen storage: Challenges, progress and prospects

Huang

et al. 2019

Sci. China Mater.

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“…Complex hydrides have attracted attention as hydrogen storage materials during the last two decades [5] owing to their high hydrogen capacity. While complex hydrides have high hydrogen content compared to metal hydrides, i.e., MgH 2 , they also possess a complex multistep sorption process due to the presence of an H atom covalently bonded in a tetrahedron AlH 4 and BH 4 or NH 2 anion, which is bonded with the alkali or alkaline metal cations, thus forming alanate, borohydride, and amide families [21][22][23][24]177,178]. The presence of strong covalent bonds, i.e., Al-H, B-H, and N-H, makes them hard to decompose and rehydrogenate.…”

Section: Catalysts For Complex Hydridesmentioning

confidence: 99%

“…Several methods have been proposed for reducing the activation barrier and enhancing the kinetics of hydrogen sorption. These include nano-scaling and use of catalysts [21][22][23][24]. Some researchers also include alloying as a tool of altering the kinetics [24], however, in our opinion alloying mainly affects the thermodynamics of a system.…”

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confidence: 99%

Catalytic Tuning of Sorption Kinetics of Lightweight Hydrides: A Review of the Materials and Mechanism

2018

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Hydrogen storage materials have been a subject of intensive research during the last 4 decades. Several developments have been achieved in regard of finding suitable materials as per the US-DOE targets. While the lightweight metal hydrides and complex hydrides meet the targeted hydrogen capacity, these possess difficulties of hard thermodynamics and sluggish kinetics of hydrogen sorption. A number of methods have been explored to tune the thermodynamic and kinetic properties of these materials. The thermodynamic constraints could be resolved using an intermediate step of alloying or by making reactive composites with other hydrogen storage materials, whereas the sluggish kinetics could be improved using several approaches such as downsizing and the use of catalysts. The catalyst addition reduces the activation barrier and enhances the sorption rate of hydrogen absorption/desorption. In this review, the catalytic modifications of lightweight hydrogen storage materials are reported and the mechanism towards the improvement is discussed.

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“…In this regard, solid-state hydrogen storage, in metal hydride-based systems, presents advantages in comparison with storage systems based on compressed gaseous hydrogen and/or on liquefied hydrogen at cryogenic temperature [6][7][8]. Among the several classes of solid-state hydrogen 2 of 16 storage materials, complex metal hydrides (e.g., borohydrides [BH 4 ] − , alanates [AlH 4 ] − , and amides [NH 2 ] − ) have been intensively investigated because of their high gravimetric hydrogen densities (ρ m ), [3,4,[9][10][11][12][13][14][15][16][17][18][19][20]. In fact, most of the complex hydrides display capacity values above 7 wt.% H 2 , e.g., LiBH 4 : 18.36 wt.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Stability of Li-RHC Embedded in an Adaptive TPX™ Polymer Scaffold

Pistidda

Abetz

et al. 2020

Materials

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In this work, the possibility of creating a polymer-based adaptive scaffold for improving the hydrogen storage properties of the system 2LiH+MgB2+7.5(3TiCl3·AlCl3) was studied. Because of its chemical stability toward the hydrogen storage material, poly(4-methyl-1-pentene) or in-short TPXTM was chosen as the candidate for the scaffolding structure. The composite system was obtained after ball milling of 2LiH+MgB2+7.5(3TiCl3·AlCl3) and a solution of TPXTM in cyclohexane. The investigations carried out over the span of ten hydrogenation/de-hydrogenation cycles indicate that the material containing TPXTM possesses a higher degree of hydrogen storage stability.

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The kinetics of lightweight solid-state hydrogen storage materials: A review

Cited by 122 publications

References 203 publications

Lightweight hydrides nanocomposites for hydrogen storage: Challenges, progress and prospects

Lightweight hydrides nanocomposites for hydrogen storage: Challenges, progress and prospects

Catalytic Tuning of Sorption Kinetics of Lightweight Hydrides: A Review of the Materials and Mechanism

Enhanced Stability of Li-RHC Embedded in an Adaptive TPX™ Polymer Scaffold

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