储氢合金La(下标 0.7-x)Ce(下标 x)Mg0.3Ni2.4Co0.6 (x=0~0.4)电化学性能研究

The effect of partial substitution of Ce for La on the structure and the electrochemical properties of the La(subscript 0.7-x)Ce(subscript x) Mg0.3Ni2.4Co0.6 (x=0~0.4) hydrogen storage alloys have been investigated systematically. The result of X-ray powder diffraction (XRD) show that the alloys are all consisted of the LaNi3 phase and the LaNi5 phase. The maximum discharge capacity is decreased gradually with increase of the Ce contents, but the cycling life is improved obviously.