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

0466903 - ÚFM 2017 RIV SK eng J - Článek v odborném periodiku
Čermák, Jiří - Král, Lubomír - Roupcová, Pavla
Influence of long-term ageing upon the capacity of hydrogen
storage in two novel Mg-Ni-In-C alloys.
Kovové materiály. Roč. 54, č. 6 (2016), s. 389-396. ISSN 0023-432X. E-ISSN 1338-4252
Grant CEP: GA MŠMT(CZ) ED1.1.00/02.0068
Institucionální podpora: RVO:68081723
Klíčová slova: magnesium alloys * indium * hydrogen * hydrogen storage
Kód oboru RIV: BJ - Termodynamika
Impakt faktor: 0.366, rok: 2016

We have shown previously that the addition of In and C enhances the hydrogen desorption
capacity and considerably improves the kinetics of hydrogen desorption from Mg-Ni based
alloys, important from the perspective of hydrogen storage. In this paper, we present the results
of tests of the long-term stability of the sorption behaviour of these materials. We studied
how the capacity and sorption kinetics changed 5 years from the preparation of two chosen
Mg-Ni-In-C alloys differing in indium concentration. Kinetic curves and PCT isotherms were
measured at temperatures of 250–350 ◦ C. It was found that long-term storage of the hydrogen-
charged samples led to no significant downgrade in hydrogen sorption kinetics. However, the
absorption capacity somewhat decreased from about 5 wt.% H 2 to about 3 wt.% H 2 due
to partial phase decomposition. Relatively intensive tentative oxidation during preparation,
which had a slightly beneficial effect on the desorption rate of freshly-prepared samples, caused
almost total blocking of hydrogen sorption in the aged samples.
Trvalý link: http://hdl.handle.net/11104/0265260