Nguyen, B. P. N., Chazelle, S., Cerbelaud, M., Porcher, C. W. & Lestriez, B. (2014) Manufacturing of industry-relevant silicon negative composite electrodes for lithium ion-cells. J. Power Sources, 262 112–122.
Added by: Laurent Cournède (2016-03-10 21:01:55)
|Type de référence: Article
Numéro d'identification (ISBN etc.): 0378-7753
Clé BibTeX: Nguyen2014
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Mots-clés: battery anodes, carboxymethyl cellulose, cycle life, dispersant, dispersion homogeneity, Electrochemical performance, Electrode formulation, fluoroethylene carbonate, high-capacity, Latex, licoo2 cathodes, Lithium-ion battery, si electrodes, silicon, solid-electrolyte
Créateurs: Cerbelaud, Chazelle, Lestriez, Nguyen, Porcher
Collection: J. Power Sources
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In this paper, Poly (acrylic-co-maleic) acid (PAMA) is used as a dispersant to improve the stability of electrodes slurries for large scale processing of Silicon based negative composite electrode. The stability and homogeneity of the slurries are characterized using different techniques. Sedimentation test, electrical measurement, SEM-EDX observations as well as rheological measurements show that a more homogeneous distribution of carbon black (CB) inside the stack of Si particles is reached with presence of PAMA. However, the amount of PAMA is limited due to the competition in the adsorption of PAMA and Carboxylmethyl cellulose (CMC) at the surface of the CB particles. Upon cycling with capacity limitation, the optimized electrode formulation at lab scale could achieve more than 400 cycles with surface capacity similar to 2.5-3.3 mAh cm(-2). At the pilot scale, the improvement of adhesion of the tape to the current collector by using Styrene-co-Butadiene rubber copolymer latex (SB) helps to maintain long cycle life while calendaring is detrimental to electrochemical properties. (C) 2014 Elsevier B.V. All rights reserved.
Added by: Laurent Cournède