Synthesis and characterization of phosphate-modified LiMn2O4 cathode materials for Li-ion battery

LiMn2O4 spinel cathode materials were modified with 2 wt.% Li-M-PO4 (M = Co, Ni, Mn) by polyol synthesis method. The phosphate surface-modified LiMn2O4 cathode materials were physically characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). The charge-discharge test showed that the cycling and rate capacities of LiMn2O4 cathode materials were significantly enhanced by stabilizing the electrode surface with phosphate. (C) 2010 Qing Lai Jiang. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.