| 초록 |
Nanostructured conducting polymers have been studied as the promising material candidate for energy storage application due to their enhanced surface area, high conductivity and reversible redox activity. However, conducting polymers mostly suffer from poor cyclic stability, which has limited their application. Here, we present the physical incorporation of monodispersed polypyrrole (PPy) nanospheres as a guest species into stacked graphene layers without major property degradation. The electrochemical properties of the graphene/particulate PPy (GPPy) hybrids depended on the PPy nanosphere size and content. The nanohybrids exhibited optimum electrochemical performance in terms of redox activity, charge transfer resistance, and specific capacitance at an 8:1 PPy-to-graphite (graphene precursor) weight ratio. The packing density of the alternately stacked nanohybrid structure varied with the nanosphere content, indicating the potential for the realization of high volumetric capacitance. |
