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

Abstract

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 nanotubes (CNT) network. Ultrafine FeCo2O4/Fe2O3 nanoparticles offer abundant electrolyte-accessible active sites for efficient Li+ ions 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 mAh g-1, maintaining 609.8 mAh g-1 following 100 cycles, offering valuable insights for the future development of anode materials for Li-ion battery.