| 초록 |
To enhance the conductivity of cathode materials, we propose a surface modification of Ni-rich NCM cathode materials with a high ionic conductor, LATP and a high electronic conductor, MWCNTs. In this study, a lithium-ion conductor, NASICON was successfully synthesized via a modified Pechini method. For the surface modification, a LATP and a Ni-rich NCM were combined by grinding them together. LATP-coated NCM exhibits a high diffusion level in the voltage range of 2.8–4.35 V at 25 °C owing to an increased ionic conductivity. Subsequently, MWCNTs, which are electrically conducting, are coated onto the LATP-coated NCM via a wet process. The electrochemical performance of the MWCNT/LATP dual-coated Ni-rich NCM was evaluated at 25 and 45 °C. The results demonstrate that the dual-coated Ni-rich NCM cathode materials exhibit a high discharge capacity, adequate rate capability, and stable cycling performance. |
