One-dimensional Li3VO4/carbon fiber composites for enhanced electrochemical performance as an anode material for lithium-ion batteries

Lithium vanadium oxide (Li3VO4) has gained attention as an alternative anode material because of its higher theoretical capacity (592 mAh g -1), moderate ionic conductivity ( similar to 10 -4 S cm -1), and lower work-ing voltage range ( similar to 0.5-1.0 V vs. Li/Li +) in comparison to other metal oxides. However, there are dis-advantages to using Li3VO4 as an anode material, such as low initial Coulombic efficiency and poor rate performance that is attributed to its low electronic conductivity ( < 10 -10 S cm -1). In the present study, the synthesis of one-dimensional Li3VO4 electrode was performed via a facile method by using oxidized vapor grown carbon fiber as a template and the formation of the outer shells of conductive carbon via chemical vapor deposition technique. In a half-cell configuration, the prepared Li3VO4 composites exhib-ited an enhanced electrochemical performance with a reversible capacity of 516.2 mAh g -1 after 100 cycles at a rate of 0.5 C within the voltage range of 0.01-3.0 V. At a high rate of 5 C, a large reversible capacity of 322.6 mAh g -1 was also observed after 500 cycles. The full cell (LVO/VGCF16-C||LiCoO2) us-ing LiCoO2 as the cathode showed competitive electrochemical performance, which demonstrates its high potential in commercial applications.(c) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.