Synthesis and enhanced lithium storage properties of electrospun V ₂O₅ nanofibers in full-cell assembly with a spinel Li ₄Ti₅O₁₂ anode

We have successfully demonstrated the reversible electrochemical Li-insertion properties of electrospun vanadium pentoxide nanofibers (VNF) in full-cell assembly with a Li₄Ti₅O₁₂ anode. Li-insertion in to VNF is restricted for the intercalation of 1 mol of Li by adjusting lower cutoff potential (2.5-4 V vs Li). The half-cell (Li/VNF) delivered a reversible capacity of ∼148 mA h g^-1 with excellent cycleability and capacity retention of over 85% after 30 cycles. Full-cell assembly is conducted for such VNF cathodes after the electrochemical lithiation (LiV₂O₅) with spinel Li₄Ti₅O ₁₂ anode under the optimized mass loadings. Full-cell (LiV ₂O₅/Li₄Ti₅O₁₂) delivered an excellent cycleability irrespective of applied current densities with good reversible capacity of ∼119 mA h g^-1 (at 20 mA g^-1 current density). This work clearly demonstrates the possibility of using LiV₂O₅/Li₄Ti₅O₁₂ configuration for high power applications such as hybrid electric vehicles and electric vehicles in the near future.