Investigation of Al modification as cationic dopants in Ni-rich LiNi0.91Co0.06Mn0.03O2 cathode

초록

In this paper, we have successfully prepared Al-doped Ni-rich LiNi0.91Co0.06Mn0.03O2 cathodes. The structural properties and electrochemical performances are studied according to Al cationic doping. It can be confirmed that the crystallinity and cation disordering of Ni-rich LiNi0.91Co0.06Mn0.03O2 were improved by Al doping. Based on such excellent structural quality, the electrochemical performance of Al doping LiNi0.91Co0.06Mn0.03O2 was superior to that of pristine LiNi0.91Co0.06Mn0.03O2. The Al doping Ni-rich NCM has an initial discharge capacity of 209.2 mAh g(-1). In addition, it shows superior rate capability by showing capacity retention of 58.5% under a high rate of 6.0 C. Therefore, it can be judged that Al doping LiNi0.91Co0.06Mn0.03O2 can be applied to next-generation cathode for long-distance and fast-charging electric vehicles.

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