Structural, solid-gas and electrochemical characterization of Mg2Ni-rich and MgxNi100-x amorphous-rich nanomaterials obtained by mechanical alloying
Identifieur interne : 000728 ( Main/Merge ); précédent : 000727; suivant : 000729Structural, solid-gas and electrochemical characterization of Mg2Ni-rich and MgxNi100-x amorphous-rich nanomaterials obtained by mechanical alloying
Auteurs : M. Abdellaoui [Tunisie] ; S. Mokbli [Tunisie] ; F. Cuevas [France] ; M. Latroche [France] ; A. Percheron Guegan [France] ; H. Zarrouk [Tunisie]Source :
- International journal of hydrogen energy [ 0360-3199 ] ; 2006.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Hydrogène.
English descriptors
- KwdEn :
Abstract
Using a planetary ball mill and starting from a mixture of Mg and Ni with an atomic ration of 2:1, we successfully elaborated a nanocomposite material formed by the Mg2Ni phase in high proportion, some residual Ni and an amorphous phase. The synthesis of this composite proceeded at milling intensities 7 and 10, corresponding to 3.5 and 10 W/g shock power, respectively, after 18 and 4h. The best hydrogen absorption capacity reported, 3.75 H mol-1 (3.53 wt%) is for the composite synthesized for 24 h at 3.5 W/g shock power. Using the same planetary ball mill and starting from a mixture of Mg2Ni and Ni with a Mg atomic content ranging from 40 to 60at%, we elaborated amorphous phase alloys with little quantities of residual Ni. The synthesis of the amorphous phase proceeded at 6.49 W/g shock power, for milling durations ranging from 8 to 101 h for Mg40Ni60 and Mg60Ni40 samples, respectively. The best electrochemical capacity (470mAh/g) was obtained for the Mg50Ni50 sample obtained at milling duration 10 times shorter than that reported in the literature.
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Ni-rich and Mg<sub>x</sub>
Ni<sub>100-x</sub>
amorphous-rich nanomaterials obtained by mechanical alloying</title>
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Ni-rich and Mg<sub>x</sub>
Ni<sub>100-x</sub>
amorphous-rich nanomaterials obtained by mechanical alloying</title>
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<term>Nanocomposite</term>
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<term>Alliage mécanique</term>
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<term>Magnésium Nickel Alliage</term>
<term>Nanocomposite</term>
<term>Nanomatériau</term>
<term>Hydrogène</term>
<term>Alliage amorphe</term>
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<front><div type="abstract" xml:lang="en">Using a planetary ball mill and starting from a mixture of Mg and Ni with an atomic ration of 2:1, we successfully elaborated a nanocomposite material formed by the Mg<sub>2</sub>
Ni phase in high proportion, some residual Ni and an amorphous phase. The synthesis of this composite proceeded at milling intensities 7 and 10, corresponding to 3.5 and 10 W/g shock power, respectively, after 18 and 4h. The best hydrogen absorption capacity reported, 3.75 H mol<sup>-1</sup>
(3.53 wt%) is for the composite synthesized for 24 h at 3.5 W/g shock power. Using the same planetary ball mill and starting from a mixture of Mg<sub>2</sub>
Ni and Ni with a Mg atomic content ranging from 40 to 60at%, we elaborated amorphous phase alloys with little quantities of residual Ni. The synthesis of the amorphous phase proceeded at 6.49 W/g shock power, for milling durations ranging from 8 to 101 h for Mg<sub>40</sub>
Ni<sub>60</sub>
and Mg<sub>60</sub>
Ni<sub>40</sub>
samples, respectively. The best electrochemical capacity (470mAh/g) was obtained for the Mg<sub>50</sub>
Ni<sub>50</sub>
sample obtained at milling duration 10 times shorter than that reported in the literature.</div>
</front>
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<tree><country name="Tunisie"><noRegion><name sortKey="Abdellaoui, M" sort="Abdellaoui, M" uniqKey="Abdellaoui M" first="M." last="Abdellaoui">M. Abdellaoui</name>
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