Effects of Rare-Earth Content on the Properties of Co-Free MmxMl1-x(NiCuAlZn5)Hydrogen Storage Alloys
MmxMl1-xNi4.14Cu0.5Al0.3Zn0.06 (Mm=Ce-rich misch-metal, Ml=La-rich misch-metal, x=0, 0.2, 0.4, 0.6, 0.8, 1) alloys have been synthesized by the inter-media alloy method. The properties of these alloys have been systematically investigated by means of X-ray diffraction (XRD), pressure-composition isotherms (PCT), electrochemical impendence (EIS) and cyclic voltammogram (CV). The X-ray diffraction results indicated that these alloys had a CaCu5-type hexagonal crystal structure. With increasing the Mm content, the plateau pressure and volume expansion of their hydrides were increased, but the volume of unit was decreased.
Z.Y. Zhong, H. Saka, T.H. Kim, E.A. Holm, Y.F. Han and X.S. Xie
Y. J. Wang and H. Yuan, "Effects of Rare-Earth Content on the Properties of Co-Free MmxMl1-x(NiCuAlZn5)Hydrogen Storage Alloys", Materials Science Forum, Vols. 475-479, pp. 2517-2520, 2005