Engineering a ternary one-dimensional Fe2P@SnP0.94@MoS2 mesostructure through magnetic-field-induced self-assembly as a high-performance lithium-ion battery anode

Abstract

Engineering energy-storage materials possessing high-speed electronic and ionic transport properties for secondary batteries is significant. Here, we develop a ternary one-dimensional mesostructured anode composed of MoS₂ nanosheets grown in situ on SnP_0.94 nanotubes infilled with Fe₂P nanospheres, which is prepared by magnetic-field-induced self-assembly. The mesostructure provides fast transport pathways for electrons, as verified through a galvanostatic intermittent titration technique; and the voids effectively alleviate the volume change, enabling long-term cycling stability. The Fe₂P@SnP_0.94@MoS₂ anode displays a high capacity of 797.5 mA h g⁻¹ after cycling 800 times at 2 A g⁻¹, a coulombic efficiency of 99.4%, and stable rate-performance after three rounds of cycling. Furthermore, the anode shows high capacities at different temperatures, indicating that the composite presented here has a promising potential for use in real conditions.