| 초록 |
Black Phosphorus (BP) has become a candidate for energy applications since it provides high theoretical capacities of 2,600 mAh g-1. Nonetheless, their rate and cycling capabilities are suffered from intrinsic (de-)alloying mechanism. Herein, we reveal unique molecular-level surface redox sites on oxygen functionalized BP nanosheets, hybridizing with graphene through strong interlayer covalent bonding. Our in-situ spectroelectrochemical and theoretical analyses suggest that the active oxidized P redox sites display truly reversible pseudocapacitive behavior, providing superior electrochemical performance. Our chemical approach proposes the effective way to develop the supercapacitor electrodes with novel mechanism, high capacitance, excellent rate capability, and prolonged cycle life. |
