ZnFe2O4 hollow rods enabling accelerated polysulfide conversion for advanced lithium-sulfur batteries

The high energy density and favorable cost-effectiveness make lithium-sulfur (Li-S) batteries one of the most attractive storage systems. However, low sulfur utilization poor cycle life, resulting from losses soluble polysulfide intermediates, their sluggish redox conversion process, severely impede practical applications reliable Li-S batteries. Effectively inhibiting diffusion accelerating is beneficial to enhance performance cathodes. Herein, a novel carbon-free ZnFe2O4 hollow rod has been developed as an advanced host material confine polysulfides within cathode accelerate during cycling. anchored by structure are shown be rapidly converted lithium sulfides. Detrimental therefore effectively inhibited. kinetics cathodes systematically investigated, revealing that can improve activity for Li2S deposition, facilitate lithium-ion diffusion, lower reaction barriers multistep phase transition sulfur. As result, [email protected]2O4 composite exhibit improved cycling capacity 1158 mAh g?1. These results demonstrate accelerated essential enhancing electrochemical