Pilot-scale elaboration of graphite/microfibrillated cellulose anodes for Li-ion batteries by spray deposition on a forming paper sheet

•Processing of Li ion cell electrodes on a pilot paper machine by spray coating.•Use of microfibrillated cellulose in the formulation of the electrode slurry.•Electrodes displayed excellent mechanical properties and good cycling performances.•Pilot scale validation of new/high throughput technology...

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Bibliographic Details
Published in:Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2014-05, Vol.243, p.372-379
Main Authors: Beneventi, D., Chaussy, D., Curtil, D., Zolin, L., Bruno, E., Bongiovanni, R., Destro, M., Gerbaldi, C., Penazzi, N., Tapin-Lingua, Sandra
Format: Article
Language:English
Subjects:
Anodes
Binders
Cellulose
Cycles
Electrodes
Graphite
Lithium batteries
Lithium battery
Lithium-ion batteries
Microfibrillated cellulose
Spray coating
Water based process
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Summary:•Processing of Li ion cell electrodes on a pilot paper machine by spray coating.•Use of microfibrillated cellulose in the formulation of the electrode slurry.•Electrodes displayed excellent mechanical properties and good cycling performances.•Pilot scale validation of new/high throughput technology for electrodes processing. A new spray coating water-based process is here proposed for the rapid and reliable large-scale production of self-standing Li-ion battery electrodes using truly natural microfibrillated cellulose as binder. The graphite/carbon black microfibrillated cellulose slurry was spray coated on a wet paper substrate which, subsequently pressed and dried on a conventional pilot paper machine, led to the formation of a bilayered electrode with excellent mechanical properties, cycling performances vs Li metal comparable to those of anodes with standard composition, (i.e. Young Modulus of 2.5GPa and specific capacity of 350mAhg−1 at 0.1C) but a Coulombic efficiency (ca. 98% in the first 50 cycles) which needs to be improved to maintain good cycling performances in Li-ion systems. This work demonstrated that well-established industrial papermaking techniques and materials can be adapted to the elaboration of well-functioning electrodes thus paving the way for the transfer the Li-ion battery industrial area of high-throughput paper production technologies.
ISSN:1385-8947
1873-3212
DOI:10.1016/j.cej.2013.12.034