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In this study, we report on the synthesis of a new AB 3-type compound LaZr 2 Mn 4 Ni 5 (with a content of 40 wt %) at room temperature during 5h of mechanical alloying. This compound was synthesized from the two binary compounds LaNi 5 (CaCu 5-type structure, P6/mmm space group) and ZrMn 2-Laves phase (MgZn 2-type structure, P6 3 /mmc space group) in order to take advantage of the hydrogen absorption properties of these two types of intermetallic compounds. Structural properties were investigated using X-ray diffraction (XRD). The surface morphology of the cycled electrode was observed by a scanning electron microscope (SEM). The electrochemical properties of the LaZr 2 Mn 4 Ni 5-based alloy were determined using the chrono-potentiometry method. The experimental results indicate that the discharge capacity reaches a maximum value of 300 mAh/g. Solid-gaz reaction shows that this compound is able to form the LaZr 2 Mn 4 Ni 5 H 13 hydride at room temperature at an absorption plateau pressure of about 7 bar.