Molecular Perturbation of 2D Organic Modifiers on Porous Carbon Interlayer: Promoted Redox Kinetics of Polysulfides in Lithium-Sulfur Batteries

Abstract The rate performance of Li-S batteries still remains poor due to the limited redox kinetics of polysulfides (PSs). Herein, by selectively coating a set of 2-demensional (2D) organic molecules, chenodeoxycholic acid (CA), 4,4′,4′′,4′′′-(porphine-5,10,15,20-tetrayl) tetrakis (benzoic acid) (TTBA), berberine chloride hydrate (BCH) and poly(diallyl dimethyl ammonium chloride) (PDDA) on honey comb-like porous carbon (HC) interlayers, respectively, the redox kinetics of PSs are remarkably enhanced in the interspace between the 2D molecules and carbon matrix, in the order of CA