Vacancy-Mediated Sulfur Exchange Between Catalysts and Polysulfides Accelerates Sulfur Redox Kinetics in Lithium-Sulfur Batteries.
Metal sulfides are promising sulfur electrocatalysts for lithium-sulfur (Li-S) batteries, yet their rational design is limited by an incomplete understanding of interfacial sulfur redox processes. Here, we reveal a vacancy-mediated sulfur-exchange mechanism that accelerates sulfur redox kinetics. Using Bi2S3 as a model...