Development and electrochemical performances of Li3V2(PO4)3 and Li4Ti5O12 materials for lithium-ion battery

Abstract

The development and electrochemical performances of Li3V2(PO4)3 cathode and Li4Ti5O12 anode materials have been reported in this work using CR2032 coin half-cell as well as full cell testing. Physicochemical characterizations of both the materials were studied using X-ray diffraction and scanning electron microscopy. The XRD patterns reveal the formation of the pure phase for both the samples. SEM micrographs show the formation of micrometer size, irregular-shaped and heterogeneously dispersed grains for Li3V2(PO4)3 (LVP) sample while Li4Ti5O12 (LTO) possesses nanometer size grains with nearly spherical morphology. Electrochemical tests reveal that the full cell made with mass/capacity balancing factor γ = 1.64 delivers better rate and cycling performances as compared to the full cell with γ = 0.92. The initial discharge capacity was obtained to be 92 mAhg−1 at 0.1 C for the cell with γ = 1.64 and retained 100% capacity even after 30 charge/discharge cycles at the same rate.