Abstract
A developed In
2
O
3
-coated LiFePO
4
(In
2
O
3
@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 LiFePO
4
(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 In
2
O
3
coating layer. The In
2
O
3
@LFP cathode provides high discharge and charge capacities, around 135 and 125 mA h g
−1
. Furthermore, the coulombic efficiency of the In
2
O
3
@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 In
2
O
3
@LFP cathode. These remarkable electrochemical characteristics of the In
2
O
3
@LFP electrode encourage the development of prospective cathode electrode materials.
Graphical abstract
Highlights
A new In
2
O
3
-coated LiFePO
4
cathode is successfully fabricated by the sol–gel technique.
The phase analysis and microstructure imaging of In
2
O
3
@LiFePO
4
cathode are conducted.
The synthesized cathode exhibits a remarkably improved electrochemical performance under the In
2
O
3
coating layer.
Cyclic voltammetry results show the highest redox currents and the best reversibility of the In
2
O
3
@LiFePO
4
cathode.
Adding the In
2
O
3
coating could pave the way for the use of LiFePO
4
cathode materials in practice.