Chemical Research in Chinese Universities ›› 2023, Vol. 39 ›› Issue (6): 1100-1105.doi: 10.1007/s40242-023-3196-9

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Hierarchical Ti3C2/TiO2/MoS2 Composite as an Anode Material for Sodium-ion Batteries

BAI Yulin1, FENG Rong1, YAN Tao1, LIU Yusi2, CUI Li3, and WANG Kaixue2   

  1. 1. College of Aeronautics and Astronautics, Taiyuan University of Technology, Taiyuan 030024, P.R. China;
    2. Shanghai Electrochemical Energy Devices Research Center, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P.R. China;
    3. State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Joint International Research Laboratory of Metabolic & Developmental Sciences, Shanghai Jiao Tong University, Shanghai 200240, P.R. China
  • Received:2023-08-18 Online:2023-12-01 Published:2023-11-18
  • Contact: WANG Kaixue E-mail:k.wang@sjtu.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (No.22105142) and the Fundamental Research Program of Shanxi Province, China (No.20210302124332).

Abstract: MoS2 with a large interlayer spacing of 6.24 Å (1 Å=0.1 nm) and a high theoretical capacity of 678 mA·h·g‒1 is recognized as a potential electrode candidate for sodium-ion batteries. However, its agglomeration tendency and volume change upon the charge/discharge cycling lead to fast capacity decay and poor cyclic stability. In this work, a hierarchical Ti3C2/TiO2/MoS2 composite was prepared to improve the electrochemical performance of MoS2. Ti3C2Tx MXene was used as a conductive agent and mechanical support, while zero-strain TiO2 generated through the in-situ oxidization of Ti3C2Tx MXene was utilized as a structural stabilizer. Compared with Ti3C2/TiO2, Ti3C2, and MoS2, the Ti3C2/TiO2/MoS2 composite exhibited excellent electrochemical performance: a high specific capacity of 413.6 mA·h·g‒1 was retained after charge/discharge at 0.1 A/g for 100 cycles and a high rate capacity of 302.2 mA·h·g‒1 was achieved at 8.0 A/g as an anode material for sodium-ion batteries. Therefore, this work sheds light on the development of MoS2-based materials for anodes of sodium-ion batteries.

Key words: Transition metal dichalcogenide, MXene, TiO2, Anode material, Electrochemical performance, Sodium-ion battery