Release time:2024-12-24  Hits:

• Key Words:CARBON
• Abstract:The Mo-based oxides/sulfides are promising cathode materials for Zn-ion batteries (ZIBs). However, the volume expansion and poor intrinsic electronic conductivity limit their electrochemical performance. Herein, a strategy of introducing active organic small molecule (ethylenediamine) into the interlayer of the Mo-based oxides/ sulfides (MoOS) is reported to solve these shortcomings. The experimental analysis reveals that ethylenediamine (EDA) can regulate the composition ratio of MoO3/MoS2 for its reduction ability, which can improve the electronic conductivity of the EDA-intercalated MoOS (MoOS-EDA). Besides, EDA can efficiently decrease the Zn2 insertion energy for its strong coordinated ability with Zn2 , in combination with the enhanced interlayer spacing and the strong repulsion with Zn2 from the non-polar group-CH2CH2 in EDA, leading to enhanced ionic transferring kinetics and Zn2 storage ability. The theoretical and experimental analysis have confirmed the organic guest and inorganic skeleton all participate in the Zn2 storage process. As a result, compared with the MoOS cathode, the MoOS-EDA exhibits improved specific capacity (203 vs. 88 mAh/g at 0.1 A/g) and prolonged cycle stability. Moreover, the soft-package cell based on MoOS-EDA cathode also delivers an impressive electrochemical performance. This work provides a strategy to improve the Zn2 transfer kinetics in MoS2 cathode material towards high-performance ZIBs.
• Volume:496
• Issue:-
• Translation or Not:no