Tuning the surface structure of CeO2 nanoparticles by chlorine-doped strategy to improve the polysulfide reaction kinetic for lithium sulfur battery

Boosting the reaction kinetics of sulfur cathode is a key strategy to develop the advanced lithium sulfur battery. Herein, we proposed a chlorine-modified strategy to regulate the LiPSs redox kinetics on CeO2 nanoparticle surface successfully. As a result, the derived CNT/CeO2-Cl composite with successful LiPSs restriction/conversion and electron conductivity can be regarded as the sulfur host material and the CNT/CeO2-Cl/S cathode exhibits superior electrochemical performance. Over 200 cycles, the CNT/CeO2-Cl/S could deliver the discharge capacity of 820.8 mAh/g with a capacity retention ratio of 82.9 %, which is higher than other cathodes. This result confirms the promising application foreground of CNT/CeO2-Cl for advanced lithium sulfur battery.