A novel method for preparation of LiNi_(1/3)Mn_(1/3)Co_(1/3)O_2 cathode material for Li-ion batteries

摘要

Micro-spherical particle of Ni-Mn-Co alloy was synthesized by powder metallurgy pulverization (PMP) method with Ni, Co and Mn metal as raw materials. Then spherical and dense LiNi_(1/3)Mn_(1/3)Co_(1/3)O_2 particle with well-ordered layered structure is obtained by calcining the oxide of Ni-Mn-Co alloy and Li_2CO_3. The as-prepared material was characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and electrochemical tests. LiNi_(1/3)Mn_(1/3)Co_(1/3)O_2 prepared here indicated an initial discharge capacity of 164.4 mAhg~(-1) at 0.1 C rate within the voltage range of 2.8-4.3 V. The novel method showed high efficiency and environmental friendly for industrialization.