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Karkar, Z., Jaouhari, T., Tranchot, A., Mazouzi, D., Guyomard, D., Lestriez, B. & Roue, L. (2017) How silicon electrodes can be calendered without altering their mechanical strength and cycle life. Journal of Power Sources, 371 136–147. 
Added by: Richard Baschera (2020-03-12 09:00:32)   Last edited by: Richard Baschera (2020-03-12 09:13:32)
Type de référence: Article
DOI: 10.1016/j.jpowsour.2017.10.042
Numéro d'identification (ISBN etc.): 0378-7753
Clé BibTeX: Karkar2017a
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Catégories: INTERNATIONAL, ST2E
Créateurs: Guyomard, Jaouhari, Karkar, Lestriez, Mazouzi, Roue, Tranchot
Collection: Journal of Power Sources
Consultations : 1/250
Indice de consultation : 4%
Indice de popularité : 1%
Liens URLs     https://ui.adsabs. ... 371..136K/abstract
Résumé     
The calendering of Si-based electrodes is required to obtain a substantial gain in their volumetric capacity compared to conventional graphite electrode. However, as shown in the present study performed on silicon/carbon nanoplatelets/carboxymethyl cellulose electrodes, their calendering induces a major decrease of their cycling stability. This can be attributed to the rupture of the particle-binder bridges during the calendering, lowering the mechanical strength of the electrode. It is found that these cohesive bonds can be restored through an appropriate post-calendering treatment (called maturation). It consists of storing the calendered electrode in a humid atmosphere for a few days before drying and cell assembly. From in-operando dilatometric experiments, it appears that the volumetric expansion is lower and more reversible than for a standard (not-calendered, not-matured) electrode. As a result, a remarkable improvement of the cycle life is observed. However, when cycled in Si/NMC full cell, a rapid capacity decay is observed because of the SEI instability. {<}P /{>}
  
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