 |
 |
|
Marino, C., Fullenwarth, J., Monconduit, L. & Lestriez, B. (2012) Diagnostic of the failure mechanism in NiSb2 electrode for Li battery through analysis of its polarization on galvanostatic cycling. Electrochim. Acta, 78 177–182.
Added by: Laurent Cournède (2016-03-10 21:28:38) |
| Type de référence: Article DOI: 10.1016/j.electacta.2012.05.126 Numéro d'identification (ISBN etc.): 0013-4686 Clé BibTeX: Marino2012 Voir tous les détails bibliographiques  |
Catégories: ST2E Mots-clés: Cathode, Composite electrode formulation, composite electrodes, conversion reaction, Failure mechanism, graphite, intercalation, Li ion battery, Lithium-ion batteries, negative electrodes Créateurs: Fullenwarth, Lestriez, Marino, Monconduit Collection: Electrochim. Acta |
Consultations : 1/531
Indice de consultation : 4% Indice de popularité : 1% |
| Résumé |
|
A simple analysis of the polarization resistance of the electrodes as function of the loading mass for various cycling rates allows identifying the fading mechanism on cycling of NiSb2, a typical conversion material: pulverization of active mass and further degradation of the electronic wiring at high rate and agglomeration of the active mass at low rate. Such rate-control of the degradation mechanism might reflect a thermodynamic instability of interfaces in the lithiated compound, which would however be in kinetic competition with the Lithium de-insertion. The analysis of the electrode polarization resistance fingerprint to rapidly identify the failure mechanism in a composite electrode can be generalized to other active materials. (C) 2012 Elsevier Ltd. All rights reserved.
Added by: Laurent Cournède |