Degradation behavior of LaNi5−xSnxHz (x=0.20–0.25) at elevated temperatures

Strain formation and lattice parameter change in LaNi4.75Sn0.25–H system during the initial activation process

“…Hydriding properties of LaNi 5−x Sn x have been reported as a good candidate of heat pump material for space use by one of the present authors [8][9][10], these alloys show a wide and flat plateau region and good stability for repeated hydriding-dehydriding cycles. They show little peak broadening in XRD profiles even after hydriding [11,12].…”

Structural and hydrogen sorption properties of SmNi5−xAlx system – An experimental and theoretical study

“…Similar resistance is obtained with the addition of Co or Sn. It is found that substitution of Ni with Sn reinforces the alloy in face of thermal cycling and thermal aging [50]. Therefore, the LaNi 4.8 Sn 0.2 is recognized as one of the more resistant hydrides, which loses only 10% of its initial capacity after 1500 thermal cycles and less than 15% after 10 000 cycles [44].…”

An in-situ neutron diffraction study of the ageing of CaNi5Dx at 80°C and 9bar

“…This process, in combination with physical corrosion has prevented the use of pure LaNi 5 as a viable long-term hydrogen storage material, and has been the driving force behind the development of stable generic substitutional commercial powders such as MmNi 3.5 Co 0.8 Mn 0.4 Al 0.3 . As this type of powder now enjoys widespread commercial use, research into the decomposition process in similar alloy compositions [1] and simple mono substituted alloys such as LaNi 5−x Mn x [2] and LaNi 5−x Sn x [3] has become highly relevant. Despite this, the exact crystallography of the decomposition process in the parent LaNi 5 system has remained quite elusive, and many investigations have produced contentious results.…”