Articulo
On the effect of the carbonaceous substrate in the nucleation of Sn nanoparticles for Li-ion anodes: experiments and first principles calculations
Registro en:
issn:1432-8488
issn:1433-0768
Autor
Smrekar, Sacha
Zoloff Michoff, Martin E.
Thomas, Jorge Enrique
Calderón, Cecilia A..
Farigliano, Lucas M.
Visintin, Arnaldo
Leiva, Ezequiel P. M.
Barraco, Daniel E.
Institución
Resumen
The nucleation of Sn nanoparticles by chemical reduction was studied using three different carbonaceous substrates, to obtain Sn/C composites. When used as active materials in anodes for lithium-ion batteries, these composites displayed higher capacities than commercially used graphite, and showed a good cyclability. The differences in morphology, capacity, cyclability, and diffusion between the resulting materials are highlighted. The resulting materials were characterized by charge-discharge cycling, voltammetry, EIS, SEM, and TEM microscopy. It was found that the substrate has a determinant effect on the deposition of Sn. This effect is interpreted in terms of the relative adsorption energies of a single Sn atom obtained from DFT calculations. Facultad de Ciencias Exactas Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas