High-entropy oxide hollow spheres as efficient catalysts to accelerate sulfur conversion kinetics toward lithium–sulfur batteries†

Abstract

High-entropy metal oxide ((Fe_0.2Co_0.2Ni_0.2Cu_0.2Zn_0.2)₃O₄, HEO) hollow spheres were accurately designed and prepared as efficient catalysts to boost the polysulfide redox kinetics for lithium–sulfur batteries. Owing to the strong chemical adsorption and catalytic effect of HEO on polysulfide transformation, the HEO@S electrode exhibits excellent electrochemical performance.