Activation of hydrogen storage materials in the Li-Mg-N-H system: Effect on storage properties

Jun Yang; Andrea Sudik; C. Wolverton

doi:10.1016/j.jallcom.2006.05.039

Activation of hydrogen storage materials in the Li-Mg-N-H system: Effect on storage properties

Jun Yang^*, Andrea Sudik, C. Wolverton

^*Corresponding author for this work

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

61 Scopus citations

Abstract

We investigate the thermodynamics, kinetics, and capacity of the hydrogen storage reaction: Li₂Mg(NH)₂ + 2H₂ ⇔ Mg(NH₂)₂ + 2LiH. Starting with LiNH₂ and MgH₂, two distinct procedures have been previously proposed for activating samples to induce the reversible storage reaction. We clarify here the impact of these two activation procedures on the resulting capacity for the Li-Mg-N-H reaction. Additionally, we measure the temperature-dependent kinetic absorption data for this hydrogen storage system. Finally, our experiments confirm the previously reported formation enthalpy (ΔH), hydrogen capacity, and pressure-composition-isotherm (PCI) data, and suggest that this system represents a kinetically (but not thermodynamically) limited system for vehicular on-board storage applications.

Original language	English (US)
Pages (from-to)	334-338
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	430
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jallcom.2006.05.039
State	Published - Mar 14 2007

Keywords

Crystal structure
Hydrogen storage
Li-Mg-N-H
Lithium amide
Magnesium hydride
Mechanical alloying
PCT activation
Powder X-ray diffraction

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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title = "Activation of hydrogen storage materials in the Li-Mg-N-H system: Effect on storage properties",

abstract = "We investigate the thermodynamics, kinetics, and capacity of the hydrogen storage reaction: Li2Mg(NH)2 + 2H2 ⇔ Mg(NH2)2 + 2LiH. Starting with LiNH2 and MgH2, two distinct procedures have been previously proposed for activating samples to induce the reversible storage reaction. We clarify here the impact of these two activation procedures on the resulting capacity for the Li-Mg-N-H reaction. Additionally, we measure the temperature-dependent kinetic absorption data for this hydrogen storage system. Finally, our experiments confirm the previously reported formation enthalpy (ΔH), hydrogen capacity, and pressure-composition-isotherm (PCI) data, and suggest that this system represents a kinetically (but not thermodynamically) limited system for vehicular on-board storage applications.",

keywords = "Crystal structure, Hydrogen storage, Li-Mg-N-H, Lithium amide, Magnesium hydride, Mechanical alloying, PCT activation, Powder X-ray diffraction",

author = "Jun Yang and Andrea Sudik and C. Wolverton",

year = "2007",

month = mar,

day = "14",

doi = "10.1016/j.jallcom.2006.05.039",

language = "English (US)",

volume = "430",

pages = "334--338",

journal = "Journal of Alloys and Compounds",

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number = "1-2",

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TY - JOUR

T1 - Activation of hydrogen storage materials in the Li-Mg-N-H system

T2 - Effect on storage properties

AU - Yang, Jun

AU - Sudik, Andrea

AU - Wolverton, C.

PY - 2007/3/14

Y1 - 2007/3/14

N2 - We investigate the thermodynamics, kinetics, and capacity of the hydrogen storage reaction: Li2Mg(NH)2 + 2H2 ⇔ Mg(NH2)2 + 2LiH. Starting with LiNH2 and MgH2, two distinct procedures have been previously proposed for activating samples to induce the reversible storage reaction. We clarify here the impact of these two activation procedures on the resulting capacity for the Li-Mg-N-H reaction. Additionally, we measure the temperature-dependent kinetic absorption data for this hydrogen storage system. Finally, our experiments confirm the previously reported formation enthalpy (ΔH), hydrogen capacity, and pressure-composition-isotherm (PCI) data, and suggest that this system represents a kinetically (but not thermodynamically) limited system for vehicular on-board storage applications.

AB - We investigate the thermodynamics, kinetics, and capacity of the hydrogen storage reaction: Li2Mg(NH)2 + 2H2 ⇔ Mg(NH2)2 + 2LiH. Starting with LiNH2 and MgH2, two distinct procedures have been previously proposed for activating samples to induce the reversible storage reaction. We clarify here the impact of these two activation procedures on the resulting capacity for the Li-Mg-N-H reaction. Additionally, we measure the temperature-dependent kinetic absorption data for this hydrogen storage system. Finally, our experiments confirm the previously reported formation enthalpy (ΔH), hydrogen capacity, and pressure-composition-isotherm (PCI) data, and suggest that this system represents a kinetically (but not thermodynamically) limited system for vehicular on-board storage applications.

KW - Crystal structure

KW - Hydrogen storage

KW - Li-Mg-N-H

KW - Lithium amide

KW - Magnesium hydride

KW - Mechanical alloying

KW - PCT activation

KW - Powder X-ray diffraction

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DO - 10.1016/j.jallcom.2006.05.039

M3 - Article

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VL - 430

SP - 334

EP - 338

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - 1-2

ER -

Activation of hydrogen storage materials in the Li-Mg-N-H system: Effect on storage properties

Abstract

Keywords

ASJC Scopus subject areas

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