An overview on the structure and electrochemical properties of Co-free Ni-rich LiNi0.8Mn0.1Fe0.1O2 as a cathode material for lithium-ion batteries

This study explores and throws more light on a new cobalt-free, nickel-rich LiNi0.8Mn0.1Fe0.1O2 cathode material for lithium-ion batteries. New technique was used to synthesize cobalt-free cathode material by replacing cobalt with iron in the NMC structure. The material is synthesized using a two-step process: first, an oxalate precursor is formed via co-precipitation, followed by a solid-state reaction with lithium hydroxide and iron citrate. The physico-chemical properties of LiNi0.8Mn0.1Fe0.1O2 are analyzed using various techniques, including X-ray diffraction, Raman spectroscopy, scanning electron microscopy, thermal gravimetric analysis, energy dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy (XPS). Electrochemical performance of the LiNi0.8Mn0.1Fe0.1O2 electrode is evaluated at a C/2 rate within a voltage range of 3.0-4.4 V vs. Li+/Li and delivers a specific capacity of approximately 80 mAh g(-1). The capacity increases to 120 mAh/g after decreasing the current density to C/10 rate within the same voltage range of 3.0-4.4 V vs. Li+/Li. This relatively new cathode material also shows a good rate capability.