Electrochemical properties of the LaNi_(3.55)Mn_(0.4)Al_(0.3)Co_(0.4)Fe_(0.35) hydrogen storage alloy

摘要

The electrochemical properties of LaNi3.55Mno.4Alo.3Coo.4Feo.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 percent after 30 cycles. The values of the hydrogen diffusion coefficient D_H obtained through cyclic volammo-gram and chronoamperometric techniques were, respectively, 7.01 X 10~(-8) cm~2 s~(-1) and 4.23 X 10~(-11) cm~2 s~(-1).