Bottom-up preparation of MgH₂ nanoparticles with enhanced cycle life stability during electrochemical conversion in Li-ion batteries

A promising anode material for Li-ion batteries based on MgH₂ with around 5 nm average particles size was synthesized by a bottom-up method. A series of several composites containing MgH₂ nanoparticles well dispersed into a porous carbon host has been prepared with different metal content up to 70 w...

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Published inNanoscale Vol. 6; no. 23; pp. 14459 - 14466
Main Authors Oumellal, Yassine, Zlotea, Claudia, Bastide, Stéphane, Cachet-Vivier, Christine, Léonel, Eric, Sengmany, Stéphane, Leroy, Eric, Aymard, Luc, Bonnet, Jean-Pierre, Latroche, Michel
Format Journal Article
LanguageEnglish
Published England 06.11.2014
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Summary:A promising anode material for Li-ion batteries based on MgH₂ with around 5 nm average particles size was synthesized by a bottom-up method. A series of several composites containing MgH₂ nanoparticles well dispersed into a porous carbon host has been prepared with different metal content up to 70 wt%. A narrow particle size distribution (1-10 nm) of the MgH₂ nanospecies with around 5.5 nm average size can be controlled up to 50 wt% Mg. After a ball milling treatment under Ar, the composite containing 50 wt% Mg shows an impressive cycle life stability with a good electrochemical capacity of around 500 mA h g(-1). Moreover, the nanoparticles' size distribution is stable during cycling.
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content type line 23
ISSN:2040-3372
DOI:10.1039/c4nr03444a