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0219U102255,
0119U101747
,
Development of efficient hydrogen storage and electrode materials based on the magnesium nanocomposites for autonomous energy supply systems
Zavaliy Ihor Yu., Доктор хімічних наук
24-12-2019
Karpenko Physico-Mechanical Institute of NASU
The effect of partial Ni substitution on Fe and Mn on the hydrogen-sorption properties of the RMMgNi4-yMy alloys was investigated (REM = Y, La, Pr, Nd; M = Fe, Mn; y = 0.5 and 1). It has been shown in the paper that the synthesized compounds readily absorb hydrogen at room temperature and a hydrogen pressure of 10 bar. The gas hydrogenation for some compounds revealed a change in structure from the original cubic to the rhombic. The rhombic structure was established for the following hydrides La0.5Pr0.5MgNi3.5Fe0.5H ~ 4.5, La0.5Nd0.5MgNi3.5Fe0.5H ~ 4.5, PrMgNi3.5Fe0.5H4.5 and NdMgNi3.5Fe0.5H4.3. The effect of partial Ni substitution on Co on the hydrogen adsorption properties of RMMgNi4-yCoy alloys was investigated (REM = Pr, Nd; y = 0.5; 1; 2; 3). It has been shown in the paper that the synthesized compounds readily absorb hydrogen at room temperature and a hydrogen pressure of 10 bar. The gas hydrogenation for some compounds revealed a change in structure from the original cubic to the rhombic. For electrochemical hydrogenation, it is shown that the maximum charge-discharge capacity is characteristic of alloys with a cobalt content of y = 0.5; 1. It is shown that the electrodes Pr0.5Nd0.5MgNi3Co can improve their parameters with increasing magnesium content and the discharge capacity reaches 300 mAh / h.
Berezovets Vasyl V.
Verbovytsky Yury V.
Zavaliy Ihor Yu.
Oshchapovskyy Ihor V.
2020-04-02
Updated: 2025-12-07
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