Binder‐Assisted Dispersion of Agglomerated Carbon Nanotubes for Efficiently Establishing Conductive Networks in Cathodes of Li‐Ion Batteries

Abstract

Carbon nanotubes (CNTs) are a promising conductive additive for Li‐ion batteries. However, good dispersion of agglomerated CNTs (ACNTs) still remains challenge. Herein, a binder‐assisted dispersion of ACNTs is demonstrated to efficiently construct a homogeneous conductive network in LiFePO4 cathodes. The addition of polyvinylidene fluoride (PVDF) significantly reduces the size of ACNT agglomerates, which leads to better dispersion of ACNTs in N‐methyl‐pyrrolidone. The LiFePO4 electrodes with conductive networks constructed from PVDF–ACNT suspensions exhibit superior electrode performance, as compared to those using the commercial CNT slurry.