Ultrafine FeCo2O4/Fe2O3 nanoparticles anchored on carbon nanotubes as high-performance anode materials for lithium-ion batteries

A novel FeCo₂O₄/Fe₂O₃@CNT anode material was engineered through a facile solvothermal assembly of ultrafine FeCo₂O₄/Fe₂O₃ nanoparticles onto a three-dimensional (3D) conductive carbon nanotube (CNT) network. Ultrafine FeCo₂O₄/Fe₂O₃ nanoparticles offer abundant electrolyte-accessible active sites for efficient Li⁺ ion transportation. Additionally, the unique 3D network constructed by CNTs helps accelerate electronic transmission and mitigate the volume expansion of metal oxide particles. As a result, superior electrochemical performance is achieved. Namely, at a current density of 500 mA g^-1, the FeCo₂O₄/Fe₂O₃@CNT exhibited an initial discharge specific capacity of 1469.8 mA h g^-1, maintaining 609.8 mA h g^-1 following 100 cycles, offering valuable insights for the future development of anode materials for Li-ion batteries.