| 초록 |
LiNi0.8Co0.1Mn0.1O2 (NCM 811) with high practical capacity and low cost is a promising material for development of lithium ion batteries. However, NCM811 have critical drawbacks, including serious capacity degradation during long-term cycling, thermal instability. In this work, we applied the plasma-assisted mechanochemistry (PMC) to increase greatly the interfacial affinity between NCM811 and polymeric binder PVDF by introducing diverse functional groups to the materials with plasma treatment (O2, N2, Ar) with mechanical force. The chemically functionalized PVDF by oxygen plasma in the PMC process forms intimately coating layer and ensures fluent ion conduction to avoid the blocking Li+ transport path on surface of the NCM811 particles during the charge/discharge cycle. This approach easily enhanced the electrochemical performances with conventional electrode materials alone through the plasma-assisted composite process that allows simple control of the surface properties of NCM811. |
