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Superionicity in the hydrogen storage material Li2NH: Molecular dynamics simulations
Vise andre og tillknytning
2009 (engelsk)Inngår i: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 79, nr 17Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

We have employed ab initio molecular dynamics simulations in an attempt to study a temperature-induced order-disorder structural phase transformation that occurs in Li2NH at about 385 K. A structural phase transition was observed by us in the temperature range 300-400 K, in good agreement with experiment. This transition is associated with a melting of the cation sublattice (Li+), giving rise to a superionic phase, which in turn is accompanied by an order-disorder transition of the N-H bond orientation. The results obtained here can contribute to a better understanding of the hydrogen storage reactions involving Li2NH and furthermore broaden its possible technological applications toward batteries and fuel cells.

sted, utgiver, år, opplag, sider
2009. Vol. 79, nr 17
Emneord [en]
ab initio calculations, bonds (chemical), hydrogen storage, lithium, compounds, molecular dynamics method, order-disorder transformations, augmented-wave method, crystal-structure, energy, diffraction, water
Identifikatorer
URN: urn:nbn:se:kth:diva-18467DOI: 10.1103/PhysRevB.79.172101ISI: 000266501100001Scopus ID: 2-s2.0-66749111340OAI: oai:DiVA.org:kth-18467DiVA, id: diva2:336514
Merknad
QC 20100525Tilgjengelig fra: 2010-08-05 Laget: 2010-08-05 Sist oppdatert: 2017-12-12bibliografisk kontrollert

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