Alloying of Mg/Mg2Ni eutectic by chosen non-hydride forming elements: Relation between segregation of the third element and hydride storage capacity

Ageing of Mg–Ni–H hydrogen storage alloys

“…This paper continues our previous works dealing with hydrogen diffusion [19] and catalysis of hydrogen desorption [20] in MgeNieH and hydrogen storage capacity of ternary MgeNieX alloys [21]. The incubation period preceding the onset of hydrogen desorption limits severely the application potential of MgeNi-based HSM in rapid hydrogen charging/ discharging cycles at reasonably low operation temperatures that are interesting for the practical use.…”

Influence of long-term ageing upon the capacity of hydrogen storage in two novel Mg-Ni-In-C alloys

“…The distribution of X over the phases present in HSM is not uniform. Additive elements X prefer rather the Mg 2 Ni phase than the Mg phase and the segregation of X is especially strong in the hydrated phase Mg 2 Ni(X)H 4 , as was reported in [30]. This means that the overall effect of X is mediated by its influence on phase Mg 2 Ni.…”

“…In our previous studies [28][29][30][31][32], it was observed that additions of carbon and indium to a Mg-based alloy improved its hydrogen desorption behaviour. It was also shown that the alloy undergoes some ageing/ripening after the initial hydrogen charging [29], which induced a substantial improvement in hydrogen desorption kinetics.…”

“…*Phase composition of freshly-prepared Alloy 2 taken from previous studies [28][29][30][31][32]; XRD analysis of freshly prepared Alloy 1 was not done. trons - Fig.…”

“…The combined effect of Ni and elements X from the 13th and 14th group was investigated in [30]. It was found that the best results could be achieved when In is introduced into the Mg-Ni base.…”