As a cathode material of aqueous rechargeable zinc‐ion batteries (ARZIBs), molybdenum disulfide (MoS₂) still suffers sluggish intercalation kinetics, poor electronic conductivity and insufficient active surface. Here, a hierarchical hybrid composing of ultrathin MoS₂ nanosheets with expanded interlayer spacing that grow directly on the surface of carbon nanotubes (MoS₂@CNTs) is firstly proposed as the cathode material of ARZIBs. Its zinc storage performance and corresponding enhanced mechanism are investigated via electrochemical characterizations and density functional theory calculations. The results reveal that the enlarged spacing of MoS₂ interlayer decreases the energy barrier of Zn²⁺ intercalation and the CNTs backbone improves the electron transfer. What's more, the hierarchical structure provides a great number of active sites for electrochemical reactions. As a result, the hierarchical MoS₂@CNTs hybrid delivers a high reversible capacity with good cycling stability and rate capability.

中文翻译：

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分层MoS2 @ CNTs混合材料作为可充电锌离子电池的长寿命和高速率阴极。

作为水性可再充电锌离子电池（ARZIBs）的阴极材料，二硫化钼（MoS ₂）仍然存在缓慢的插层动力学，差的电子电导率和不足的活性表面。在此，首先提出了由层间间距扩大的超薄MoS ₂纳米片直接在碳纳米管（MoS ₂ @CNTs）上生长组成的分层混合体作为ARZIBs的阴极材料。通过电化学表征和密度泛函理论计算研究了其锌存储性能和相应的增强机理。结果表明，增大的MoS ₂中间层间距降低了Zn ²⁺的能垒插层和CNTs骨架改善了电子转移。此外，分层结构为电化学反应提供了大量的活性位点。结果，分层的MoS ₂ @CNTs杂化物提供了高的可逆容量以及良好的循环稳定性和速率能力。