The Thermal Decomposition of Lithium Aluminum Hydride

Block, Jacob.; Gray, A.

doi:10.1021/ic50025a009

Cited by 100 publications

(72 citation statements)

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“…According to the discussion in [21] the first exothermic (peak 1) at 143.8 °C in Figure 12a is most likely attributed to the reaction of the surface aluminum-hydroxyl groups owing to the presence of impurities as first reported by Block and Gray [29]:…”

Section: Complex Hydridesmentioning

confidence: 53%

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A Review of Recent Advances on the Effects of Microstructural Refinement and Nano-Catalytic Additives on the Hydrogen Storage Properties of Metal and Complex Hydrides

et al. 2010

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Abstract:The recent advances on the effects of microstructural refinement and various nano-catalytic additives on the hydrogen storage properties of metal and complex hydrides obtained in the last few years in the allied laboratories at the University of Waterloo (Canada) and Military University of Technology (Warsaw, Poland) are critically reviewed in this paper. The research results indicate that microstructural refinement (particle and grain size) induced by ball milling influences quite modestly the hydrogen storage properties of simple metal and complex metal hydrides. On the other hand, the addition of nanometric elemental metals acting as potent catalysts and/or metal halide catalytic precursors brings about profound improvements in the hydrogen absorption/desorption kinetics for simple metal and complex metal hydrides alike. In general, catalytic precursors react with the hydride matrix forming a metal salt and free nanometric or amorphous elemental metals/intermetallics which, in turn, act catalytically. However, these catalysts change only kinetic properties i.e. the hydrogen absorption/desorption rate but they do not change thermodynamics (e.g., enthalpy change of hydrogen sorption reactions). It is shown that a complex metal hydride, LiAlH 4 , after high energy ball milling with a nanometric Ni metal catalyst and/or MnCl 2 catalytic precursor, is able to desorb relatively large quantities of hydrogen at RT, 40 and 80 °C . This kind of behavior is very encouraging for the future development of solid state hydrogen systems. OPEN ACCESSEnergies 2011, 4 2 Keywords: solid state hydrogen storage; ball milling; microstructural refinement; particle/grain size; nano-catalytic additives; simple metal and complex hydrides

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Section: Complex Hydridesmentioning

confidence: 53%

“…Finally, a small and broad endothermic peak 4 at 234.7 °C is due to the final decomposition of the small amount of remaining Li 3 AlH 6 [2,29]: 1/3Li 3 AlH 6 (solid)LiH (solid) + 1/3Al (solid) + 0.5H 2 (final)…”

Section: Complex Hydridesmentioning

confidence: 99%

A Review of Recent Advances on the Effects of Microstructural Refinement and Nano-Catalytic Additives on the Hydrogen Storage Properties of Metal and Complex Hydrides

et al. 2010

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“…Thermolysis of LiAlH 4 is initiated by the melting of LiAlH 4 , T mp (LiAlH 4 ) = 125 • C [23], which subsequently decomposes into solid Li 3 AlH 6 and Al accompanied by an exothermic release of hydrogen gas in the temperature range 150-220 • C [59,60]. The exothermic decomposition in this first step hinders the full reversibility of the system.…”

Section: Metal Alanatesmentioning

confidence: 99%

Complex Metal Hydrides for Hydrogen, Thermal and Electrochemical Energy Storage

et al. 2017

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Hydrogen has a very diverse chemistry and reacts with most other elements to form compounds, which have fascinating structures, compositions and properties. Complex metal hydrides are a rapidly expanding class of materials, approaching multi-functionality, in particular within the energy storage field. This review illustrates that complex metal hydrides may store hydrogen in the solid state, act as novel battery materials, both as electrolytes and electrode materials, or store solar heat in a more efficient manner as compared to traditional heat storage materials. Furthermore, it is highlighted how complex metal hydrides may act in an integrated setup with a fuel cell. This review focuses on the unique properties of light element complex metal hydrides mainly based on boron, nitrogen and aluminum, e.g., metal borohydrides and metal alanates. Our hope is that this review can provide new inspiration to solve the great challenge of our time: efficient conversion and large-scale storage of renewable energy.

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“…the enthalpy change is positive and entropy change negative, and it cannot be expected that the reaction will take place [51]. The greater stability of LiH over NaH might be the difference, as eventually two of the three Li-H bonds would have to decompose to yield LiAlH 4 .…”

Section: Catalyzed Molecular Decomposition and The Importance Of Alumentioning

confidence: 99%

Perspective on the Storage of Hydrogen: Past and Future

Kelly

2011

Structure and Bonding

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There are clear advantages to using hydrogen as a fuel, but storage of hydrogen in a light-weight and compact form remains a challenge. This review highlights past breakthroughs that led to the current thinking in hydrogen storage methodology. Metal organic frameworks are discussed briefly, with greater attention to the storage of hydrogen in other molecules. Many molecular storage strategies rely on the thermal decomposition of hydrogen hetero atom bonds and formation of hydrogen to hydrogen bonds. An acid-base thought model is presented to explain observed behaviors and to guide future endeavors.

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The Thermal Decomposition of Lithium Aluminum Hydride

Cited by 100 publications

References 0 publications

A Review of Recent Advances on the Effects of Microstructural Refinement and Nano-Catalytic Additives on the Hydrogen Storage Properties of Metal and Complex Hydrides

A Review of Recent Advances on the Effects of Microstructural Refinement and Nano-Catalytic Additives on the Hydrogen Storage Properties of Metal and Complex Hydrides

Complex Metal Hydrides for Hydrogen, Thermal and Electrochemical Energy Storage

Perspective on the Storage of Hydrogen: Past and Future

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