研究了Cu含量变化对Lao.6Nd0.4Ni4.8Mn0 2Cux(x=0,0.1,0.2,0.3,0.4)合金系的晶胞参数、热力学性能以及贮氢性能的影响,讨论了晶胞参数与吸放氢平台压力以及吉布斯自由能之间的关系.研究结果表明,随着Cu含量的增加,晶胞参数á增加,c减小,晶胞体积先增大后减小;吸放氢平台压力随着晶胞参数á的增加呈线性降低;La0.6Nd0.4Ni4.8Mn0.2Cux合金的Seitz半径随着Cu含量的增加而减小,并且与△Sd/△Hd之间呈现非常好的线性关系,与△Sa/△Ha之间存在双曲线关系.
The influences of Cu content on the crystal structure,thermodynamic properties and hydrogen storage performance of La0.6 Nd0.4 Ni4.8 Mn0.2Cux(x=0,0.1,0.2,0.3,0.4)alloys 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 á shrunk and c expanded while the cell volume increased when x≤0.2 and then decreased when x≥0.3.The plateam pressure linearly decreased with the increase of á.The Seitz radius decreased with the increase of the Cu content and showed a clear linear relationship with △Sd/△Hd and an obvious hyperbolic relationship with △Sa/△Ha.
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