Enhanced stability of nitrogen doped porous carbon fiber on cathode materials for high performance lithium-sulfur batteries.

ABSTRACT: Lithium-sulfur (Li-S) batteries are considered to be one of the candidates for high-energy density storage systems due to their ultra-high theoretical specific capacity of 1675 mA h g^-1. However, problems of rapid capacity decay, sharp expansion in volume of the active material, and the shuttle effect have severely restricted their subsequent development and utilization. Herein, we design a nitrogen-doped porous carbon nanofiber (NPCNF) network as a sulfur host by the template method. The NPCNF shows a feather-like structure. After loading sulfur, the NPCNF/S composite can maintain a hierarchically porous structure. A high discharge capacity of 1301 mA h g^-1 is delivered for the NPCNT/S composite at 0.1C. The reversible charge/discharge capacity at 2C is 576 mA h g

SUBMITTER: Wu X 

PROVIDER: S-EPMC9379792 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature