| 초록 |
Black phosphorus nanosheets (BP) have attracted much attention for energy storage applications owning to their high theoretical capacities of 2,600 mAh g-1. Unfortunately, the rate and cyclic capabilities of BP are suffered from their intrinsic charge storage mechanism of (de-)alloying. Herein, we unveiled novel molecular-level surface redox sites on controllably oxidized BP, coupling with graphene via strong interlayer binding. Our in-situ experiments and theoretical calculations indicated that the surface redox sites of oxidized P showed truly reversible pseudocapacitive mechanism, resulting in the improvement of electrochemical performance metrics. Our chemical strategies could pave the effective way to develop energy storage devices based on two-dimensional materials for future next-generation applications. |
