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摘要：Despite the significant potential of layered molybdenum disulfide (MoS2) as a cathode material for aqueous zinc-ion batteries (ZIBs), its electrochemical performance is hindered by challenges including volume expansion, low conductivity, and dissolution during prolonged charging/discharging cycles. Herein, a universal strategy of incorporating low-polarity organic molecules into the interlayer of MoS2 is reported to stabilize the structure and enhance conductivity, thus addressing these issues. Through experimental and theoretical analyses, the insertion of representative guest n-butanol (n-BuOH) triggers a phase transition from semiconducting 2H-MoS2 to metallic 1T-MoS2, accompanied by a reduction in desolvation energy and ion diffusion barriers, thereby accelerating reaction kinetics. Additionally, the strong interaction between n-BuOH and Mo4 effectively stabilizes the MoS2 framework, while the soft alkyl chain of n-BuOH synergistically decreases the interfacial strain and mitigates the volume expansion during the cycling process. Consequently, the prepared n-BuOH inserted MoS2 (n-Bu-MoS2) delivers a high-rate capability (236.5 mAh g-1 at 0.3 A g-1 with 104.9 mAh g-1 at 5 A g-1) and exceptional cycle stability (95.6 % capacity retention after 300 cycles at 1 A g-1). Moreover, various experimental results demonstrate the phase transition between 2H and 1T-MoS2 during the energy storage process. This work provides new insights into the employment of low-polarity organic guests to enhance the electrochemical performance of MoS2.
卷号：697
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是否译文：否