A facile and novel organic coprecipitation strategy to prepare layered cathode material Li[Li sub(0.2)Mn sub(0.54)Ni sub(0.13)Co sub(0.13)]O sub(2) with high capacity and excellent cycling stability

The lithium-rich layered cathode material Li[Li sub(0.2)Mn sub(0.54)Ni sub(0.13)Co sub(0.13)]O sub(2) with high capacity and excellent cycling stability, is successfully synthesized through a facile organic co-precipitation route. The as-obtained material exhibits a well-crystallization and uniform size distribution, above which have been characterized and observed by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Moreover, FT-IR spectra proves that the addition of metal ions M super(n+) induces a red-shift of the bond of C-N groups of the 8-hydroxyquinoline, which is used as the precipitant in this work, and most probably due to the strong complexation effect of metal ions M super(n+) with N and O atoms of 8-hydroxyquinoline, and simultaneously the co-precipitation process occurred. The electrochemical results reveal that the cathode material derived from this novel organic co-precipitation route exhibits improved electrochemical performance, of which could provide an initial discharge capacity of 287.2 mAhg super(-1) at 0.2C within a potential range of 2.0-4.8 V at room temperature, even at high C-rate of 2C, this material could also deliver a capacity of 212.1 mAh g super(-1) with 97.7% capacity retention after 100 cycles. Therefore, it is proposed that this organic co-precipitation might be a high-efficiency strategy to synthesize alternative electrode materials with improved performance.