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研究了Cu含量变化对La0.6Nd0.4Ni4.8Mn0.2Cux(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a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a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 effect of Cu content on the unit cell parameters, thermodynamic properties and hydrogen storage properties of La0.6Nd0.4Ni4.8Mn0.2Cux (x = 0,0.1,0.2,0.3,0.4) alloy was studied. The relationship between unit cell parameters and Hydrogen absorption and discharge platform pressure and Gibbs free energy relationship. The results show that with the increase of Cu content, the cell parameter a increases, c decreases, and the cell volume first increases and then decreases; the pressure on the hydrogen absorption and desorption platform decreases linearly with the increase of unit cell parameter a; The Seitz radius of 6Nd0.4Ni4.8Mn0.2Cux alloy decreases with the increase of Cu content, and shows a very good linear relationship with △ Sd / △ Hd and a hyperbolic relationship with △ Sa / △ Ha.