Electrochemical properties of the LaNi3.55Mn0.4Al0.3Co0.4Fe0.35 hydrogen storage alloy

The electrochemical properties of LaNi3.55Mn0.4Al0.3Co0.4Fe0.35 hydrogen storage alloy have been studied through chronopotentiometric, chronoamperometric and cyclic voltammogram measurements. The maximum capacity value obtained was 265 mAh g−1 at rate C/6 and the capacity decrease was recorded by 1.5% after 30 cycles. The values of the hydrogen diffusion coefficient DH obtained through cyclic volammogram and chronoamperometric techniques were, respectively, 7.01 × 10−8 cm2 s−1 and 4.23 × 10−11 cm2 s−1.