Registration Number
0221U101011,
0120U104636
, R & D reports
Title
Development of efficient hydrogen batteries and electrode materials based on magnesium nanocomposites for autonomous power supply systems
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Head
Zavalii Ihor Y., д.х.н.
Registration Date
12-01-2021
Organization
Physico-Mechanical Institute named after GV Karpenko of the National Academy of Sciences of Ukraine
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The influence of partial substitution of Ni Co and / or Mg Pr and Nd on the hydrogen adsorption properties of the (R',R'')2-xMgxNi4-yCoy (R', R'' = Pr, Nd; x = 0.8 - 1.2; y = 0 - 2) alloys was studied. It is shown that the synthesized compounds easily absorb hydrogen up to 6.5 at. H / f.u. at room temperature and a hydrogen pressure of 10 bar. During gas hydrogenation, a transformation of structure from cubic to orthorhombic was detected for some compounds. The orthorhombic structure was established for the two hydrides, namely, Nd1.2Mg0.8Ni4H4.80 and Pr0.5Nd0.5MgNi4H4.0. Electrochemical hydrogenation measurements were conducted, and a tendency increasing an electrochemical capacity was observed in the alloys with magnesium and cobalt content increased. Such electrodes exhibits a maximum discharge capacity of more than 300 mAh/g. The amorphous composites Mg2Ni - 2Ni were synthesized, which as electrode materials are characterized by high discharge capacities up to 600 mAh/g.
Product Description
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Berezovets Vasyl V.
Verbovytskyi Yurii V
Zavaliy Ihor Yu
Oshchapovskyy Ihor V.
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2021-01-12
