Chlorine Substitution in Disordered Rock Salt Li-Rich Transition Metal Sulfides

Li-rich sulfides are promising alternatives to Li-rich oxides as intercalation materials, the latter suffering from limited cycling reversibility and copious voltage fade, all associated with the redox activity of oxygen ligands upon cycling. Although moving from oxygen to sulfur ligands alleviates some of these drawbacks, sulfides suffer from their lower redox potential, which limits the energy density. Here, we partially replace divalent sulfur ligands with monovalent chlorine and synthesize t