Investigation on Crystal Structure and Thermodynamic Properties of La0.6Nd0.4Ni4.8Mn0.2Cux (x=0–0.4) Hydrogen Storage Alloys

✍ Scribed by Shenlan Li; Honghui Cheng; Xiaoxia Deng; Wei Chen; Demin Chen; Ke Yang

• Publisher: Elsevier
• Year: 2008
• Weight: 275 KB
• Volume: 37
• Category: Article
• ISSN: 1875-5372
• DOI: 10.1016/s1875-5372(09)60046-1

✦ Synopsis

The influences of Cu content on the crystal structure, thermodynamic properties and hydrogen storage performance of La 0.6 Nd 0.4 Ni 4.8 Mn 0.2 Cu x alloys (x=0, 0.1, 0.2, 0.3, 0.4) were investigated and the relationships among the lattice parameter, plateau pressure and Gibbs free energy were analyzed. It was found that with the increase of the Cu content, the lattice parameter a shrunk and c expanded while the cell volume increased when x 0.2 and then decreased when x 0.3. The plateau pressure linearly decreased with the increase of a. The Seitz radius decreased with the increase of the Cu content and showed a clear linear relationship with S d / H d and an obvious hyperbolic relationship with S / H .