The Properties of Layered Cathode Material LiNi1/3Co1/3Mn1/3O2 with Fe-doping

Abstract

A layered cathode-active material LiNi1/3Co1/3Mn1/3O2 was synthesized by sintering the admixture of oxalate co-precipitation powder of Cobalt, Nickel, and Manganese and Li2CO3. The influence of Fe-doped on the structural and electrochemical properties of LiNi1/3Co1/3Mn1/3O2 was characterized by XRD, SEM, BET and electrochemical experiments. The results reveal that LiNi1/3Co1/3Mn1/3O2 with small amounts (≤6%) of Fe-doping keeps the α-NaFeO2 layered structure. As the doping content increases, the lattice parameters increase and the random stacking happens. The average particle size is about 0.3-0.4 μm and the specific surface area decreases. The Fe-doping improved charge and discharge capacity. The 2% Fe-doped materials deliver an initial charge and discharge capacity of 243.2 and 167.4mAh·g-1.