Environmental reactivity of solid-state hydrogen storage systems: Fundamental testing and evaluation

James, Charles W.; Cortes-Concepcion, Jose A.; Tamburello, David; Anton, Donald L.

doi:10.1016/j.ijhydene.2011.05.170

Cited by 12 publications

(6 citation statements)

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“…A feasible hydrogen storage material is required to adsorb hydrogen strongly enough to form a thermodynamically stable state with a desirable storage capacity and to adsorb hydrogen weakly enough to release it by a small temperature rise . Many solid-state hydrogen storage materials are designed to meet these requirements, such as LiBH 4 , which can store hydrogen up to 6.2 wt % with a stable state at ambient condition, whereas the release of H 2 needs a very high heat transfer which results in an overall energy inefficiency. , …”

Section: Introductionmentioning

confidence: 99%

“…2 Many solid-state hydrogen storage materials are designed to meet these requirements, such as LiBH 4 , which can store hydrogen up to 6.2 wt % with a stable state at ambient condition, whereas the release of H 2 needs a very high heat transfer which results in an overall energy inefficiency. 3,4 Because of the lightweight and large surface-to-volume ratio, various carbon nanomaterials (CNs) (such as carbon nanotube (CNT), graphene, and fullerene) and metal organic frameworks (MOF) have been intensively investigated as a possible solution to hydrogen storage. 5−13 Pure CNs that interact with H 2 molecules mainly via van der Waals (vdW) force can upload and release H 2 fast.…”

Section: Introductionmentioning

confidence: 99%

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Hydrogen Adsorption of Mg-Doped Graphene Oxide: A First-Principles Study

Chen

Zhang

et al. 2013

J. Phys. Chem. C

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The hydrogen adsorption of Mg-doped graphene oxide (GO) has been studied using density functional theory calculations. It has been found that hydroxyl can be reduced from the surface of GO by Mg doping no matter whether the hydroxyl exhibits an acidity or alkalinity. The remaining Mg is strongly bound to GO in the form of −(C–O) x –Mg (x = 1 or 2). H2 can be strongly adsorbed on Mg-doped GO with a binding energy of 0.38 eV/H2 because Mg and O can jointly produce a stronger electric field and polarize H2 along almost the same direction. If Mg and O separately polarize this H2 along different direction, the charge redistribution along different directions reduces the binding energy of H2 to 0.25 eV/H2. When eight H2 molecules are adsorbed on each side of Mg-doped GO, the theoretical hydrogen storage capacity can reach to 5.6 wt % at a temperature of 200 K without any pressure.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hydrogen Adsorption of Mg-Doped Graphene Oxide: A First-Principles Study

Chen

Zhang

et al. 2013

J. Phys. Chem. C

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“…For these measurements, the calorimeter equipped with a flow cell utlilizing either argon or air as the carrier gas with a flow rate of 10 ml/min reacting with 5-10 mg of solid. [11,12]. Thermal Gravimetric Analysis (TGA) was utilized at various heating heats (0.8, 2, 5, and 10 o C/min) to determine the kinetics of ammonia borane, which was inputted into the modeling effort.…”

Section: Methodsmentioning

confidence: 99%

Environmental Reactivity of Solid State Hydride Materials: Modeling and Testing for Air and Water Exposure

Anton

James

Tamburello

et al. 2010

5th FORUM ON NEW MATERIALS PART A

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To make commercially acceptable condensed phase hydrogen storage systems, it is important to understand quantitatively the risks involved in using these materials. A rigorous set of environmental reactivity tests have been developed based on modified testing procedures codified by the United Nations for the transportation of dangerous goods. Potential hydrogen storage material, 2LiBH 4 •MgH 2 and NH 3 BH 3 , have been tested using these modified procedures to evaluate the relative risks of these materials coming in contact with the environment in hypothetical accident scenarios. It is apparent that an ignition event will only occur if both a flammable concentration of hydrogen and sufficient thermal energy were available to ignite the hydrogen gas mixture. In order to predict hydride behavior for hypothesized accident scenarios, an idealized finite element model was developed for dispersed hydride from a breached system. Empirical thermodynamic calculations based on precise calorimetric experiments were performed in order to quantify the energy and hydrogen release rates and to quantify the reaction products resulting from water and air exposure. Both thermal and compositional predictions were made with identification of potential ignition event scenarios.

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“…Risks associated with the environmental exposure also should be considered before commercial acceptance of AlH 3 as a solid-state hydrogen storage material is possible. James et al [141] conducted dry and humid air exposure studies to assess the risk of AlH 3 after exposure to the environment. AlH 3 is susceptible to vigorous reaction in the humid air.…”

Section: Application Studymentioning

confidence: 99%