Effect of additives on the hydrogen sorption properties of mechanically alloyed composites based on Mg and Mg2Ni - Archive ouverte HAL Access content directly
Journal Articles International Journal of Hydrogen Energy Year : 2005

Effect of additives on the hydrogen sorption properties of mechanically alloyed composites based on Mg and Mg2Ni

Abstract

The effect of additives on the hydrogen absorption–desorption properties of three series of composites (i) 85% Mg–15% Mg2Ni1-xMex (Me=Fe, Co; x=0, 0.1, 0.3); (ii) 75% Mg–15% Mg2Ni–10% V and 75% Mg–15% Mg2Ni–10% C and (iii) 90% Mg2Ni–10% V and 90% Mg2Ni–10% C obtained by mechanical alloying in different atmospheres was studied. The Mg2Ni1-xMex, vanadium and graphite additives were found to have a positive effect on the hydriding kinetics of magnesium, especially favorable due to the presence of cobalt in the composites 85% Mg–15% Mg2Ni1-xCox which preserved a high-absorption capacity with decreasing temperature (4 wt% H2 at a hydriding temperature of 423 K). With 90% Mg2Ni–10% V (C) composites, the additive showed an analogous positive effect on the hydriding kinetics and absorption capacity as compared with that of pure Mg2Ni. The role of the milling atmosphere (argon or hydrogen), with respect to the absorption–desorption characteristics of these composites was also studied.

Dates and versions

hal-00095355 , version 1 (15-09-2006)

Identifiers

Cite

Elie Grigorova, Mitko Khristov, Maria Khrussanova, Jean-Louis Bobet, Pavel Peshev. Effect of additives on the hydrogen sorption properties of mechanically alloyed composites based on Mg and Mg2Ni. International Journal of Hydrogen Energy, 2005, 30 (10), pp.1099-1105. ⟨10.1016/j.ijhydene.2004.10.018⟩. ⟨hal-00095355⟩

Collections

CNRS ICMCB
37 View
0 Download

Altmetric

Share

Gmail Facebook X LinkedIn More