The nickel-rich layered LiNi_xCo_yMn_1-x-yO₂ (x≥0.5) cathode materials such as LiNi_0.6Co_0.2Mn_0.2O₂ (NCM622) are amongst the most promising cathode materials due to their offerings of high capacity and high energy density [1]. The theoretical capacity of NCM622 is about 280 mAh g^-1 against the practical capacity reported about more than 180 mAh g^-1. In our work, we have achieved about more than 50% of the theoretical capacity of NCM622. However, in our experience we observed capacity variation depending on the variation on the synthesis routes.

In this work, we present the detail comparison by various synthesis methods and in-situ characterization of the structural and the electrochemical performance of the samples.

References

1. M.H. Kim; H.S. Shin; D. Shin; Y.K. Sun, Synthesis and electrochemical properties of Li[Ni_0.8Co_0.1Mn_0.1]O₂ and Li[Ni_0.8Co_0.2]O₂ via co-precipitation. J. Power Sour. 2006, 159, 1328–1333.