LaNi 5 hydride powder flowability as a function of activation and hydrogen content

Effect of glidants on LaNi5 powder flowability

“…Charging and discharging processes take place in the rotating drum, while the addition of the glidants requires the opening of the rotating drum in a glove box under controlled atmosphere. As in our previous work [36], we observed a smaller angle of repose for the discharged state. In general, the measurements show better flowability and higher relative density near 0.1 wt% glidant concentration.…”

“…More details of image capture and processing can be found in Ref. [36]. Density evolution was addressed by calculating the hydride volume from the videos and weighting the material inside the drum after each experiment.…”

“…In a previous work, we studied the flowability of LaNi 5 , a well-known hydrogen storage material, by means of a modified rotating drum that allows testing under different hydrogen pressures [36]. Among conclusions, an evaluation regarding how flowability is affected when using different amounts of glidants was suggested.…”

Sustainability applications of rare earths from metallurgy, magnetism, catalysis, luminescence to future electrochemical pseudocapacitance energy storage

“…145 On this basis, Silin et al systematically studied the reaction kinetics of LaNi 5 hydrogen storage by the two-phase coexistence initial rate method. They assumed that LaNi 5 was a spherical particle with a constant density before and after hydrogenation; the reaction's apparent activation energy is 4700 cal (g −1 mol −1 ), and the reaction rate equation is as follows: 146 …”