Engineering design of N-doped Co3O4 nanofibers as sulfur host for highly stable cathode materials

Lithium-sulfur batteries are the most promising green energy system due to their advantages, such as high energy density and environmental friendliness. It is known to all that a high stable sulfur reservoir is the most important component in the lithium-sulfur batteries to prevent the polysulfide shuttle effect to the lithium anode. Herein, a hybrid composite host material of N-doped Co 3 O 4 nanofibers (N-CONF) was prepared and used in the lithium-sulfur batteries to accommodate the element sulfur and polysulfide. Due to the synergistic effect of the N-CONF host materials, the as-prepared N-CONF/S composites exhibit high specific capacity, high coulombic efficiency, and excellent cyclic stability.