| 초록 |
Li[NixMn1-x]O2 cathode materials were synthesized with varying concentration-gradient of Ni and Mn ions from the core (90 wt% for Ni and 10 wt% for Mn) to the shell (50 wt% for Ni and 50 wt% for Mn) by a co-precipitation process. Cathode materials were prepared in various experimental conditions to investigate the particle size effects and morphology. The prepared cathode materials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and electrochemical performance. As a result, a half cell using our concentration-gradient cathode material achieved an optimum condition for a high capacity, long cycle life and improved safety. |
