Phase formation of Ce5Co19-type super-stacking structure and its effect on electrochemical and hydrogen storage properties of La0.60M0.20Mg0.20Ni3.80 (M = La, Pr, Nd, Gd) compounds

Effect of Higher Cobalt on Super Lattice Structure and Electrochemical Properties of (La,Mg)5 (Ni,Co)19 Hydrogen Storage Alloys

“…Therefore in order to get the expected phase, different preparing methods are applied to obtain La-Mg-Ni alloy, such as heat treatment, 11−16 melt-spun treatment 17,18 and sintering. 19,20 Among them, heat-treatment is considered as a simple and effective method to influence the phase abundance and homogenize the composition of the La-Mg-Ni-based alloys, for example, after annealing treatment, the phase abundance of super-lattice structure increases from 40% (as-cast) to 52%(annealed alloy), and cyclic life of electrode can be improved. 15 As is known, the element substitution may greatly affect the phase transformation.…”