NOVEL LARGE-SCALE SYNTHESIS OF C/S NANOCOMPOSITE WITH MIXED CONDUCTING NETWORKS THROUGH SPRAY DRYING APPROACH FOR Li-S BATTERIES

摘要

To meet rapidly increasing demand for higher energy density and lower costs in large-scale energy storage, lithium-sulfur (Li-S) batteries are regarded as one of the most attractive candidates for next-generation high-energy density rechargeable battery systems. Here we introduce a brand-new one-step spray drying approach to fabricate woolball-like nanocomposite of carbon/sulfur microspheres (SD-C/S). Using commercial Ketjenblack (KB) and multi-walled carbon nanotubes (MWCNTs) as sulfur supporters, we obtained a nanocomposite with high sulfur content of 81 wt.%. The designed polyporous cathodes with sulfur loading of 2.5 mg cm-2 exhibit excellent Li storage performance.