Fe2VO4 nanoparticles embedded in CNTs with fast reaction kinetics for high-performance lithium storage

Iron vanadium oxides have large exploration potentiality as anode materials for lithium ion batteries owing to their abundant resource and high capacity based on multi-electron transfer process. However, low electrical conductivity and large volume change may lead to the sluggish reaction kinetics and rapid capacity decay. Herein, Fe₂VO₄ nanoparticles are uniformly embedded in the carbon nanotubes (FVO/CNT) though the hydrothermal reaction and subsequent heat treatment. Benefiting from high electrical conductivity and structural stability of CNT, FVO/CNT composite delivers excellent lithium storage performance with superior kinetics and high reversible capacity. Furthermore, the lithium-ion full cell with LiFePO₄ as cathode presents superior cycling stability (181.5 mAh g⁻¹ after 100 cycles at 0.2 A g^-1 and 96.4 mAh g^-1 after 500 cycles at 2.0 A g^-1). This work opens up a promising path for electrochemical reaction analysis of energy storage materials and provides valuable guidance for durable lithium ion batteries with high performance.