Hydrogen storage properties of 2LiNH2 + LiBH4 + MgH2

Jun Yang; Andrea Sudik; Donald J. Siegel; Devin Halliday; Andy Drews; Roscoe O. Carter; Christopher Wolverton; Gregory J. Lewis; J. W A Sachtler; John J. Low; Syed A. Faheem; David A. Lesch; Vidvuds Ozolins

doi:10.1016/j.jallcom.2007.03.145

Hydrogen storage properties of 2LiNH₂ + LiBH₄ + MgH₂

Jun Yang^*, Andrea Sudik, Donald J. Siegel, Devin Halliday, Andy Drews, Roscoe O. Carter, Christopher Wolverton, Gregory J. Lewis, J. W A Sachtler, John J. Low, Syed A. Faheem, David A. Lesch, Vidvuds Ozolins

^*Corresponding author for this work

Materials Science and Engineering

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

48 Scopus citations

Abstract

We have investigated the ternary mixture of complex hydrides with stoichiometry 2LiNH₂ + LiBH₄ + MgH₂, and have identified a set of novel hydrogen storage reactions. One of these reactions involves the known reversible reaction Mg(NH₂)₂ + 2LiH ↔ Li₂Mg(NH)₂ + 2H₂. Previous studies have shown that initiating this reaction from the binary mixture 2LiNH₂ + MgH₂ results in poor hydrogen desorption kinetics and a small amount of NH₃ release. In contrast to this behavior, here we demonstrate that by starting from the ternary mixture 2LiNH₂ + LiBH₄ + MgH₂, the above reaction can proceed at lower temperatures and with improved kinetics, while maintaining reversibility. The advantage of starting with the ternary mixture can be traced to the subsequent formation, melting, and reaction of Li₄BH₄(NH₂)₃ with MgH₂ to form the mixed imide phase Li₂Mg(NH)₂, which acts as a seed for the reversible reaction, and is at least partly responsible for the improved kinetic response.

Original language	English (US)
Pages (from-to)	345-349
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	446-447
DOIs	https://doi.org/10.1016/j.jallcom.2007.03.145
State	Published - Oct 31 2007

Keywords

Hydrogen storage
LiBH
LiMg(NH)
LiNH
MgH
Self-catalyzing

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/j.jallcom.2007.03.145

Cite this

@article{652da0fd1d6849f985577320870ac363,

title = "Hydrogen storage properties of 2LiNH2 + LiBH4 + MgH2",

abstract = "We have investigated the ternary mixture of complex hydrides with stoichiometry 2LiNH2 + LiBH4 + MgH2, and have identified a set of novel hydrogen storage reactions. One of these reactions involves the known reversible reaction Mg(NH2)2 + 2LiH ↔ Li2Mg(NH)2 + 2H2. Previous studies have shown that initiating this reaction from the binary mixture 2LiNH2 + MgH2 results in poor hydrogen desorption kinetics and a small amount of NH3 release. In contrast to this behavior, here we demonstrate that by starting from the ternary mixture 2LiNH2 + LiBH4 + MgH2, the above reaction can proceed at lower temperatures and with improved kinetics, while maintaining reversibility. The advantage of starting with the ternary mixture can be traced to the subsequent formation, melting, and reaction of Li4BH4(NH2)3 with MgH2 to form the mixed imide phase Li2Mg(NH)2, which acts as a seed for the reversible reaction, and is at least partly responsible for the improved kinetic response.",

keywords = "Hydrogen storage, LiBH, LiMg(NH), LiNH, MgH, Self-catalyzing",

author = "Jun Yang and Andrea Sudik and Siegel, {Donald J.} and Devin Halliday and Andy Drews and Carter, {Roscoe O.} and Christopher Wolverton and Lewis, {Gregory J.} and Sachtler, {J. W A} and Low, {John J.} and Faheem, {Syed A.} and Lesch, {David A.} and Vidvuds Ozolins",

year = "2007",

month = oct,

day = "31",

doi = "10.1016/j.jallcom.2007.03.145",

language = "English (US)",

volume = "446-447",

pages = "345--349",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier BV",

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TY - JOUR

T1 - Hydrogen storage properties of 2LiNH2 + LiBH4 + MgH2

AU - Yang, Jun

AU - Sudik, Andrea

AU - Siegel, Donald J.

AU - Halliday, Devin

AU - Drews, Andy

AU - Carter, Roscoe O.

AU - Wolverton, Christopher

AU - Lewis, Gregory J.

AU - Sachtler, J. W A

AU - Low, John J.

AU - Faheem, Syed A.

AU - Lesch, David A.

AU - Ozolins, Vidvuds

PY - 2007/10/31

Y1 - 2007/10/31

N2 - We have investigated the ternary mixture of complex hydrides with stoichiometry 2LiNH2 + LiBH4 + MgH2, and have identified a set of novel hydrogen storage reactions. One of these reactions involves the known reversible reaction Mg(NH2)2 + 2LiH ↔ Li2Mg(NH)2 + 2H2. Previous studies have shown that initiating this reaction from the binary mixture 2LiNH2 + MgH2 results in poor hydrogen desorption kinetics and a small amount of NH3 release. In contrast to this behavior, here we demonstrate that by starting from the ternary mixture 2LiNH2 + LiBH4 + MgH2, the above reaction can proceed at lower temperatures and with improved kinetics, while maintaining reversibility. The advantage of starting with the ternary mixture can be traced to the subsequent formation, melting, and reaction of Li4BH4(NH2)3 with MgH2 to form the mixed imide phase Li2Mg(NH)2, which acts as a seed for the reversible reaction, and is at least partly responsible for the improved kinetic response.

AB - We have investigated the ternary mixture of complex hydrides with stoichiometry 2LiNH2 + LiBH4 + MgH2, and have identified a set of novel hydrogen storage reactions. One of these reactions involves the known reversible reaction Mg(NH2)2 + 2LiH ↔ Li2Mg(NH)2 + 2H2. Previous studies have shown that initiating this reaction from the binary mixture 2LiNH2 + MgH2 results in poor hydrogen desorption kinetics and a small amount of NH3 release. In contrast to this behavior, here we demonstrate that by starting from the ternary mixture 2LiNH2 + LiBH4 + MgH2, the above reaction can proceed at lower temperatures and with improved kinetics, while maintaining reversibility. The advantage of starting with the ternary mixture can be traced to the subsequent formation, melting, and reaction of Li4BH4(NH2)3 with MgH2 to form the mixed imide phase Li2Mg(NH)2, which acts as a seed for the reversible reaction, and is at least partly responsible for the improved kinetic response.

KW - Hydrogen storage

KW - LiBH

KW - LiMg(NH)

KW - LiNH

KW - MgH

KW - Self-catalyzing

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