New Promising Hydride Based on the Cu-Li-Mg System

• Type: Article in International Scientific Journal
• Date: 2010

Authors

M. H. Braga (Author) FEUP; A. Acatrinei (Author) FEUP; M. Hartl (Author) FEUP; S. Vogel (Author) FEUP; Th. Proffen (Author) FEUP; L. Daemen (Author) FEUP

Journal

Title: Journal of Physics: Conference Series

Vol. 251

Pages: 012040-012040

ISSN: 1742-6588

Publisher: Institute of Physics Publishing

Indexing

ISI Web of Knowledge - 2 Citations

ISI Web of Science

Scopus - 3 Citations

COMPENDEX

INSPEC

Scientific classification

FOS: Natural sciences

Other information

Authenticus ID: P-007-Y0K

DOI: 10.1088/1742-6596/251/1/012040

Abstract (EN): We investigated the ternary Cu-Li-Mg system, in particular the CuLixMg2-x (x = 0.08) for hydrogen storage. Instead of crystallizing in an orthorhombic phase, as CuMg2, this phase presents a hexagonal structure very similar to that of NiMg2 and NiMg2H0.3. In this work we will discuss the structure of CuLixMg2-x by the analysis of the neutron scattering data and first principles calculations. The first results for a hydride (deuteride) phase will also mentioned since preliminary studies at LANSCE showed that CuLixMg2-x might absorb approximately 5.3 to 6 wt% of H at an equilibrium pressure of approximately 27 bar at 200 oC. If these results are confirmed in future work, this will mean that, not only CuLixMg2-x absorbs a considerable amount of hydrogen (close to DOE¿s expectations for hydrogen storage materials), but also will probably release it at a temperature in the range of 50 to 150 oC, where applications are easier to develop. Hence it should be possible to use this alloy with fuel cells or in batteries. Another important observation is that cycling has a strong effect on the structure of the hydride.

Language: English

Type (Professor's evaluation): Scientific