Study on the Construction of Interlayer Adjustable C@MoS2 Fiber Anode by Biomass Confining and its Lithium/Sodium Storage Mechanism

Abstract Building a stable and controllable interlayer structure is the key to improving the sodium storage cycling stability and rate performance of two‐dimensional anode materials. This study explored the rich functional groups in bacterial cellulose culture medium in the way of biological self‐assembly. Mo precursors were used to produce chemical bond in bacterial cellulose culture medium, and intercalation groups are introduced to achieve MoS 2 localized nucleation and in situ localized construction of carbon intercalation stable interlaminar structure, thus improving ion transport dynamics and cycle stability. In order to avoid structural irreversibility of MoS 2 at low potential, an extended voltage window of 1.5–4 V was selected for lithium/sodium intercalation testing. It was found that there was a significant improvement in sodium storage capacity and stability. During the electrochemical cycling process, in‐situ Raman testing revealed that the structure of MoS 2 was completely reversible, and the intensity changes of MoS 2 characteristic peaks showed in‐plane vibration without involving interlayer bonding fracture. Moreover, after the lithium sodium was removed from the intercalation C@MoS 2 all structures have good retention.