Electrochemical performance of In2O3-coated LiFePO4 as a cathode material in lithium-ion batteries

A developed In2O3-coated LiFePO4(In2O3@LFP) cathode was successfully fabricated by the sol-gel technique. The structure of the fabricated cathode was scrutinized using Raman spectroscopy, XRD, SEM, and TEM techniques. The formation of the LiFePO4(LFP) phase with good crystallinity was affirmed by Raman spectroscopy and XRD results. Further, SEM and TEM studies revealed that the fabricated cathode crystallizes with a spherical-like shape. The synthesized cathode exhibits a remarkably improved electrochemical performance under the In2O3 coating layer. The In2O3@LFP cathode provides high discharge and charge capacities, around 135 and 125 mA h g(-1). Furthermore, the coulombic efficiency of the In2O3@LFP cathode was considerably promoted from 84% to 99.7%, demonstrating a high electrochemical stability during the succeeding cycles. After 50 cycles, a high-capacity retention rate was achieved. Cyclic Voltammetry (CV) results show the highest redox currents and the best reversibility of the In2O3@LFP cathode. These remarkable electrochemical characteristics of the In2O3@LFP electrode encourage the development of prospective cathode electrode materials. [GRAPHICS] .

Automated summary

In this study, a developed In2O3-coated LiFePO4 cathode was successfully fabricated by the sol-gel technique. The electrochemical performance of the synthesized cathode was remarkably improved under the In2O3 coating layer, showing high discharge and charge capacities as well as enhanced coulombic efficiency. Furthermore, the cathode exhibited a high-capacity retention rate after multiple cycles.