About: Ageing of Mg-Ni-H hydrogen storage alloys

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	In this work, ageing of Mg/Mg2Ni mixtures was investigated. It was observed that hydrogen desorption kinetics from hydrided Mg/Mg2Ni was improved considerably after ageing at room temperature for several days. The ageing was interpreted in terms of phase changes. Even after almost complete hydridation, besides two main phases e MgH2 and Mg2NiH4 - a certain amount of Mg2NiH0.3 was always present. Similar as Mg2NiH4 phase, Mg2NiH0.3 islands were located on the surface of MgH2 grains. Mg2NiH0.3 transformed into Mg2NiH4 at the expense of hydrogen from an adjoining MgH2 grain. In such a way, a clean double layer (Mg)eMg2NiH4 was formed, acting as a gate for easy hydrogen desorption from MgH2. It was found that the Mg2NiH4 phase was slightly enriched on non-twinned modification LT1 during the ageing. As a result, both the creation of (Mg)eMg2NiH4 desorption bridges and enrichment of Mg2NiH4 on LT1 during the ageing facilitated onset of rapid hydrogen desorption. In this work, ageing of Mg/Mg2Ni mixtures was investigated. It was observed that hydrogen desorption kinetics from hydrided Mg/Mg2Ni was improved considerably after ageing at room temperature for several days. The ageing was interpreted in terms of phase changes. Even after almost complete hydridation, besides two main phases e MgH2 and Mg2NiH4 - a certain amount of Mg2NiH0.3 was always present. Similar as Mg2NiH4 phase, Mg2NiH0.3 islands were located on the surface of MgH2 grains. Mg2NiH0.3 transformed into Mg2NiH4 at the expense of hydrogen from an adjoining MgH2 grain. In such a way, a clean double layer (Mg)eMg2NiH4 was formed, acting as a gate for easy hydrogen desorption from MgH2. It was found that the Mg2NiH4 phase was slightly enriched on non-twinned modification LT1 during the ageing. As a result, both the creation of (Mg)eMg2NiH4 desorption bridges and enrichment of Mg2NiH4 on LT1 during the ageing facilitated onset of rapid hydrogen desorption. (en)
Title	Ageing of Mg-Ni-H hydrogen storage alloys Ageing of Mg-Ni-H hydrogen storage alloys (en)
skos:prefLabel	Ageing of Mg-Ni-H hydrogen storage alloys Ageing of Mg-Ni-H hydrogen storage alloys (en)
skos:notation	RIV/68081723:_____/12:00380254!RIV13-GA0-68081723
http://linked.open...avai/predkladatel	Ústav fyziky materiálů AVČR, v.v.i.
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(ED1.1.00/02.0068), P(GA106/09/0814), P(GAP108/11/0148), Z(AV0Z20410507)
http://linked.open...iv/cisloPeriodika	OCT
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Čermák, Jiří Král, Lubomír
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav fyziky materiálů AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	121309
http://linked.open...ai/riv/idVysledku	RIV/68081723:_____/12:00380254
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Magnesium alloys; Hydrogen desorption; Hydrogen storage; Hydrogen-storage materials; Ageing (en)
http://linked.open.../riv/klicoveSlovo	Magnesium alloys Hydrogen-storage materials Ageing Hydrogen storage Hydrogen desorption
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[A11FE89C2585]
http://linked.open...i/riv/nazevZdroje	International Journal of Hydrogen Energy
http://linked.open...in/vavai/riv/obor	JG
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	2 (xsd:int)
http://linked.open...vavai/riv/projekt	Central european institute of technology Desorption kinetics of hydrogen in Mg2Ni-H intermetallic modified by chosen interstitials Carbon diffusion in extremely carbon-supersaturated ferrite and austenite alloys
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	37
http://linked.open...iv/tvurceVysledku	Král, Lubomír Čermák, Jiří
http://linked.open...ain/vavai/riv/wos	000309493600039
http://linked.open...n/vavai/riv/zamer	Physical properties of advanced materials in relation to their microstructure and processing
issn	0360-3199
number of pages	8 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.ijhydene.2012.07.049
is http://linked.open...avai/riv/vysledek of	Ageing of Mg-Ni-H hydrogen storage alloys

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