Improvement of hydrogen storage characteristics of Mg/Mg2Ni by alloying: Beneficial effect of In

0381511 - ÚFM 2013 RIV NL eng J - Článek v odborném periodiku
Čermák, Jiří - Král, Lubomír
Improvement of hydrogen storage characteristics of Mg/Mg2Ni by alloying: Beneficial effect of In.
Journal of Power Sources. Roč. 214, SEP (2012), s. 208-215. ISSN 0378-7753. E-ISSN 1873-2755
Grant CEP: GA MŠMT(CZ) ED1.1.00/02.0068; GA ČR GA106/09/0814; GA ČR(CZ) GAP108/11/0148
Výzkumný záměr: CEZ:AV0Z20410507
Institucionální podpora: RVO:68081723
Klíčová slova: Magnesium alloys * Hydrogen desorption * Hydrogen storage * Hydrogen storage materials
Kód oboru RIV: JG - Hutnictví, kovové materiály
Impakt faktor: 4.675, rok: 2012

In the present paper, hydrogen desorption from hydrided binary alloys Mg–xNi (x = 8.5, 11.3, 20 at. %) and from hydrided alloys Mg-8.5 Ni-2.7 X (X = Si, Ge, Sn and In; all in at. %) was investigated. It was observed that the phase composition of hydrided binary Mg–xNi alloys changed within several days after hydridation and that rapid hydrogen desorption occurred after this ageing. The ageing mechanism was clarified and its kinetics was modified by alloying. The best results were achieved by adding In: (i) the ageing process was accelerated, enabling rapid hydrogen charging/discharging cycling (ii) the storage capacity was improved slightly, and (iii) the activation enthalpy of hydrogen desorption was decreased, resulting in easier hydrogen releasing.
Trvalý link: http://hdl.handle.net/11104/0211963