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Tanguy, F., Gaubicher, J. & Guyomard, D. (2010) Operando discrimination of fast and slow active grains within a cycling electrode for lithium battery. Electrochem. Commun. 12 561–564.
Added by: Laurent Cournède (2016-03-10 21:37:33) |
| Type de référence: Article DOI: 10.1016/j.elecom.2010.01.043 Numéro d'identification (ISBN etc.): 1388-2481 Clé BibTeX: Tanguy2010a Voir tous les détails bibliographiques  |
Catégories: ST2E Mots-clés: capacity fade, Capacity fading, Electrochemical peak fitting, Electrolyte decomposition, insertion, ion batteries, Li battery, Operando XRD, Slow and fast grains, temperature Créateurs: Gaubicher, Guyomard, Tanguy Collection: Electrochem. Commun. |
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The impact of the formation of an electrolyte based decomposition layer on the distribution of the active grain kinetics has been investigated operando within a cycling electrode for lithium battery. It is demonstrated, from fitting procedure of the electrochemical responses and from operando XRD experiments, that as the passive film forms, slow reacting grains appear within the working electrode and operate simultaneously with faster grains. Slow grains are macroscopically distributed, presumably at the electrolyte side of the electrode. Discrimination of the electrochemical response pertaining to each type of grains allows rationalizing their contribution to the capacity fading dynamics. (C) 2010 Elsevier B.V. All rights reserved.
Added by: Laurent Cournède |