In this work, the effect of the charge/discharge current density on the electrochemical characteristics of the CeY2Ni9 hydrogen storage alloy, including the evolution of the electrochemical discharge capacity and the diffusivity indicator (DH/a2) has been studied systematically. The results show that this alloy exhibit excellent activation performance within three cycles at different charge/discharge current densities as well as good reaction reversibility, compared with other alloys, particularly the LaY2Ni9 parent alloy. Also, the maximum discharge capacity is obtained at the low value of the charge/discharge current density. A good stability lifetime during a long cycling is observed for all the charge/discharge current densities. The DH/a2 ratio conserves a good stabilization oscillating for a long cycling and at different charge/discharge current densities. An important correlation is observed between the evolutions of theses electrochemical parameters in the activation period and for a long cycling at different charge/discharge current densities.