| 초록 |
Although the lots of research have improved the electrochemical performance of silicon-based active materials, they are still insufficient to apply on practical industry owing to endemic problem of unstable solid-electrolyte interphase (SEI) formation on the surface. In this work, we report the near fatigue-free, ultrafast, and high-power operations of lithium-ion battery anodes employing silicide nanowires anchored selectively to the inner surface of graphene-based micro-tubular conducting electrodes. This design electrically shields the electrolyte inside the electrode from an external potential load, eliminating the driving force that generates the solid-electrolyte interphase on the nanowire surface. Thanks to this, silicide nanowires can maintain high capacity during 2000 cycles and exhibit excellent capacity retention of 88% at 80C vs. the capacity at 1C. |
