A Novel Approach of Sea Urchin-like Fe-Doped Co₃O₄ Microspheres for Li-S Battery Enables High Energy Density and Long-Lasting.

ABSTRACT: The poor cycle stability caused by the shuttle effect of polysulfides which have been key scientific issue in the development of high-efficiency lithium-sulfur (Li-S) batteries. In this work, the authors report a Fe-doped Co₃O₄ (named FCO) that was used as a sulfur-loaded host material for Li-S batteries. We demonstrate the important roles of well-designed Co₃O₄ particles and Fe atoms in regulating polysulfide conversion due to the strong adsorption of polysulfides by polar Co₃O₄, whereas Fe atoms and Co₃O₄ catalyze polysulfide conversion. Therefore, the LiS batteries with FCO-180 (When the hydrothermal temperature is 180 °C) sea urchinlike composites exhibited a high superior energy density (992.7 mAh g^-1 at 0.2 C, after 100 cycles) and long-term cyclability (649.4 mAh g^-1 at 1 C, 300 cycles) with high sulfur loading (75 wt%). This work confirms that the FCO-180 sea urchinlike increases not only the capacity of high-rate but also a generic and feasible strategy to construct practical Li-S batteries for emerging energy-storage applications.

SUBMITTER: Yan N 

PROVIDER: S-EPMC10220560 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature