One step synthesis of core@shell SiGe@Si nanoparticles and their use as active material in high capacity anodes for Li-ion batteries

Antoine Desrues (1) , John Alper (1, 2) , Florent Boismain (1) , Pierre-Eugène Coulon (3) , Adrien Soloy (1) , Cédric Haon (2) , Nathalie Herlin-Boime (1)

1 LEDNA - Laboratoire Edifices Nanométriques
2 LITEN - Laboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux
3 LSI - Laboratoire des Solides Irradiés

In the frame of energy transition, silicon is a material of interest to develop Li-ion batteries with increased energy density. Nevertheless, the important volume change upon cycling (280 %) and reactivity towards electrolytes lead to rapid degradation of performances. Designing silicon-germanium structures is an efficient strategy to obtain stable performances of Li-ion batteries anodes. The synergetic effect of alloying silicon and germanium was demonstrated by Duveau et al [1], using micrometric particles obtained by ball-milling. The stability of the alloys was better than the stability of pure silicon and its capacity was higher than the capacity of pure germanium.

Domains: Material chemistry

Antoine Desrues, John Alper, Florent Boismain, Pierre-Eugène Coulon, Adrien Soloy, et al.. One step synthesis of core@shell SiGe@Si nanoparticles and their use as active material in high capacity anodes for Li-ion batteries. Lithium Battery Discussions "Electrode Materials" (LiBD-9), Sep 2019, Arcachon, France. ⟨cea-02329299⟩