Novel mixed hydroxy-carbonate precursor assisted synthetic technique for LiNi1/3Mn1/3Co1/3O2 cathode materials

Abstract Novel mixed hydroxy-carbonate (MHC) precursors were used to synthesis technique of LiNi 1/3 Mn 1/3 Co 1/3 O 2 cathode material. The powder X-ray diffraction (XRD) pattern of the synthesized LiNi 1/3 Mn 1/3 Co 1/3 O 2 cathode materials exhibited a hexagonal cell with a = 2.8535 A and c = 14.2040 A. Fourier transform infrared spectroscopy (FT-IR) spectrum of MHC and LiNi 1/3 Mn 1/3 Co 1/3 O 2 consistent with vibration modes of functional group. Presence of sub-micrometer particle size (200 nm) and highly crystalline morphology confirmed using scanning electron microscopy (SEM). X-ray photoelectron spectroscopy (XPS) suggested that oxidation state of the transition metals; Ni in +2, Mn in +4 and Co in +3 states, respectively in LiNi 1/3 Mn 1/3 Co 1/3 O 2 cathode materials. Cyclic voltammograms (CV) revealed only one major redox couple at 4 V and suggested the absence of structural transitions from hexagonal to monoclinic structure. The Li vs . LiNi 1/3 Mn 1/3 Co 1/3 O 2 cell delivered an initial discharge capacity of 175 mAh g −1 in the voltage range 2.5–4.6 V @ 0.1 C.