Synthesis of aluminium-doped spinel LiNi0.5Mn1.5O4 with Fe2O3 and its electrochemical properties

LiNi
_0.5
Mn
_1.5
O
₄
(LNMO) spinel is a promising cathode material for electric vehicle battery since it has a higher voltage and a large electrical capacitance. In this paper, we reported an improvement of electrochemical performance from the LMNO by performing doping using Al and subsequent surface coating using Fe
₂
O
₃
. Synthesis of LNMO/Al was carried out via sol-gel method. The following surface coating of LNMO/Al was conducted by using co-precipitation process. The LNMO powder was characterized by X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and Electrochemical Impedance Spectroscopy (EIS). LiNi
_0.5
Mn
_1.5
O
₄
(LNMO) has been successfully synthesized, which confirmed by XRD and SEM characterization. Electrochemical performance of LiNi
_0.5
Mn
_1.5
O
₄
(LNMO) has been characterized using EIS, resulting in charge transfer resistance (Rct) value of 100 ohm.