Influence of the Molecular Weight of Poly-Acrylic Acid Binder on Performance of Si-Alloy/Graphite Composite Anodes for Lithium-Ion Batteries.

In this study Si-alloy/graphite composite electrodes are manufactured using water-soluble poly-acrylic acid (PAA) binder of different molecular weights (250, 450 and 1250 kg mol). The study aims to assess the behavior of the different binders across all the steps needed for electrodes preparation and on their influence on the electrodes electrochemical behavior. At first, rheological properties of the water-based slurries containing Si-alloy, graphite, conductive carbon and PAA are studied.