Propelling polysulfides transformation for high-rate and long-life lithium-sulfur batteries

A three-dimensional (3D) hierarchical porous graphene macrostructure coupled with uniformly distributed α-Fe2O3 nano-particles (denoted Fe-PGM) was designed as a sulfur host in a Lithium-sulfur battery and prepared by a one-pot hydrothermal strategy. The Fe2O3 NPs not only restrain the shuttling of LiPS by chemical adsorption as other oxides do, but also accelerate the transformation of the soluble LiPSs to insoluble products, which has never been reported. Therefore, together with 3D hierarchical porous structure facilitating fast electron/ion transfer, Fe-PGM as a sulfur host in a cathode contributes to a high rate performance as well as long cyclic stability.227