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Rousselot, S., Gauthier, M., Mazouzi, D., Lestriez, B., Guyomard, D. & Roue, L. (2012) Synthesis of boron-doped Si particles by ball milling and application in Li-ion batteries. J. Power Sources, 202 262–268.
Added by: Laurent Cournède (2016-03-10 21:28:39) |
| Type de référence: Article DOI: 10.1016/j.jpowsour.2011.11.045 Numéro d'identification (ISBN etc.): 0378-7753 Clé BibTeX: Rousselot2012 Voir tous les détails bibliographiques  |
Catégories: ST2E Mots-clés: anodes, B-doped Si particles, Ball milling, capacity, Li-ion batteries, lithium, long cycle life, negative electrodes, Resonant acoustic mixing, Si-based negative electrode, silicon, spectroscopy Créateurs: Gauthier, Guyomard, Lestriez, Mazouzi, Roue, Rousselot Collection: J. Power Sources |
Consultations : 1/548
Indice de consultation : 4% Indice de popularité : 1% |
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Boron-doped Si particles were prepared by high-energy ball-milling of pure B and Si in various proportions (0, 10(20), 10(21), 10(22) and 10(23) atoms B per mole Si). Despite the fact that only a fraction of the added B atoms were incorporated into the Si lattice, a significant decrease of the Si electrical resistivity was observed, leading to a minimum electrical resistivity of 0.13 Omega cm for the sample milled with 10(21) atoms B per mole Si compared to 190 Omega cm for the boron-free sample. Electrochemical investigations focused on these two samples showed that the B-doping of Si does not improve significantly the performance of the composite Si-based electrode for Li-ion batteries in terms of cycle life, coulombic efficiency and high-rate chargeability. Through an analysis of anodic polarization curves, it was also shown that the delithiation reaction is mainly controlled by the Li-diffusion kinetics from a rate of similar to 4C on both electrodes. Lastly, it was shown that the use of a resonant acoustic mixer for the mixing of the (Si + carbon black + carboxymethyl cellulose) components increases the cycle life of the composite electrode. (C) 2011 Elsevier B.V. All rights reserved.
Added by: Laurent Cournède |