New eco-friendly low-cost binders for Li-ion anodes

• DOI: 10.1007/s10008-017-3665-5
• Publication Date: 2017-06-09T06:40:38Z
• Authors: D. Versaci; R. Nasi; U. Zubair; J. Amici; M. Sgroi; M. A. Dumitrescu; C. Francia; S. Bodoardo; N. Penazzi
• Keywords: Tragacanth; Carboxymethyl cellulose; Environmentally Friendly; Polyvinylidene fluoride

Abstract In the production of commercial Li-ion batteries, active materials slurries are generally prepared using polyvinylidene fluoride (PVdF) as binder because its good adhesion properties and electrochemical stability. Unfortunately, there some disadvantages related to use PVdF: most important is toxic environmentally unfriendly solvents, such N -methyl-pyrrolidone (NMP), second high costs. light these considerations, it seemed straightforward investigate suitability water-soluble, inexpensive, eco-friendly test alternative binders (sodium alginate, chitosan tragacanth gum, gelatin). The rheological have been investigated in addition characterization. Furthermore, graphite electrodes with PVdF, carboxymethyl cellulose (CMC), styrene-butadiene rubber (SBR) considered for sake comparison. We found that water-soluble binders, besides performances, showed a current collector stability under experimental conditions employed, which makes them interesting next generation batteries.