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Gauthier, M., Reyter, D., Mazouzi, D., Moreau, P., Guyomard, D., Lestriez, B. & Roue, L. (2014) From Si wafers to cheap and efficient Si electrodes for Li-ion batteries. J. Power Sources, 256 32–36.
Added by: Laurent Cournède (2016-03-10 21:01:55) |
| Type de référence: Article DOI: 10.1016/j.jpowsour.2014.01.036 Numéro d'identification (ISBN etc.): 0378-7753 Clé BibTeX: Gauthier2014 Voir tous les détails bibliographiques  |
Catégories: ST2E Mots-clés: anodes, Ball milling, cells, cycle life, high-capacity, Interphase, Li-ion batteries, negative electrode, Si wafer, Silicon electrodes, silicon powder, solid-electrolyte Créateurs: Gauthier, Guyomard, Lestriez, Mazouzi, Moreau, Reyter, Roue Collection: J. Power Sources |
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High-energy ball milling is used to recycle Si wafers to produce Si powders for negative electrodes of Li-ion batteries. The resulting Si powder consists in micrometric Si agglomerates made of cold-welded submicrometric nanocrystalline Si particles. Silicon-based composite electrodes prepared with ball-milled Si wafer can achieve more than 900 cycles with a capacity of 1200 mAh g(-1), of Si (880 mAh g(-1) of electrode) and a coulombic efficiency higher than 99\%. This excellent electrochemical performance lies in the use of nanostructured Si produced by ball milling, the electrode formulation in a pH 3 buffer solution with CMC as binder and the use of FEC/VC additives in the electrolyte. This work opens the way to an economically attractive recycling of Si wastes. (C) 2014 Elsevier B.V. All rights reserved.
Added by: Laurent Cournède |