Design towards recyclable micron-sized Na₂S cathode with self-refinement mechanism.

ABSTRACT: Sodium sulfide (Na₂S) as an initial cathode material in room-temperature sodium-sulfur batteries is conducive to get rid of the dependence on Na-metal anode. However, the micron-sized Na₂S that accords with the practical requirements is obstructed due to poor kinetics and severe shuttle effect. Herein, a subtle strategy is proposed via regulating Na₂S redeposition behaviours. By the synergistic effect from both conductive structure and cuprous sulfide (Cu₂S) catalysis, the micron-sized Na₂S particles are broken down and redeposited to nano-size during the initial cycle which can be fully utilized in subsequent cycles. Consequently, the Na₂S/CPVP@Cu₂S||Na cell delivers excellent cyclability (670 mAh g_S

SUBMITTER: Lu S 

PROVIDER: S-EPMC11573996 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature