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Large interlayer spacing 2D Ta4C3 matrix supported 2D MoS2 nanosheets: A 3D heterostructure composite towards high-performance sodium ions storage

Author

Listed:
  • Liu, Mao-Cheng
  • Zhang, Yu-Shan
  • Zhang, Bin-Mei
  • Zhang, Dong-Ting
  • Tian, Chen-Yang
  • Kong, Ling-Bin
  • Hu, Yu-Xia

Abstract

2D materials is a promising Na+ insertion-type material due to its unique layered structure, however, the long diffusion channels yielded by stacking limited the Na+ storage rate capability. Herein, a 3D MoS2–Ta4C3 heterostructure (M-Ta4C3) composite is designed by supported 2D MoS2 nanosheets on/in the surface/interlayers of 2D Ta4C3 matrix for achieving high rate Na+ storage. The 2D MoS2 nanosheets is confined in the interlayers of Ta4C3 matrix that can avoid the stacking and expand the interlayer spacing of Ta4C3 matrix, which enlarges the contact surface area between electrode and electrolyte, and exposes more electrochemical active sites for Na+ storage. The Ta4C3 matrix improves the conductivity, prevents the aggregation and confines the volume expansion of MoS2 nanosheets which optimizes the structure stability and provides short Na+ diffusion channels. The M-Ta4C3 exhibits a larger interlayer spacing of 1.69 nm, extraordinary electrochemical performance and outstanding rate capability which benefitted from the 3D heterostructure. The M-Ta4C3//AC SIC owns super energy and power densities of 87.6 Wh kg−1 and 3937.3 W kg−1. This work employs Ta4C3 MXene as a Na+ storage material for the first time, and it provides an idea to improve the Na+ storage performance of 2D materials by constructing a 3D heterostructure.

Suggested Citation

  • Liu, Mao-Cheng & Zhang, Yu-Shan & Zhang, Bin-Mei & Zhang, Dong-Ting & Tian, Chen-Yang & Kong, Ling-Bin & Hu, Yu-Xia, 2021. "Large interlayer spacing 2D Ta4C3 matrix supported 2D MoS2 nanosheets: A 3D heterostructure composite towards high-performance sodium ions storage," Renewable Energy, Elsevier, vol. 169(C), pages 573-581.
    • Handle: RePEc:eee:renene:v:169:y:2021:i:c:p:573-581
    DOI: 10.1016/j.renene.2021.01.051
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    References listed on IDEAS

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    1. Wu, Xiaoyu & Li, Songmei & Wang, Bo & Liu, Jianhua & Yu, Mei, 2020. "Free-standing 3D network-like cathode based on biomass-derived N-doped carbon/graphene/g-C3N4 hybrid ultrathin sheets as sulfur host for high-rate Li-S battery," Renewable Energy, Elsevier, vol. 158(C), pages 509-519.
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