| 초록 |
Poly(styrenesulfonic acid graft aniline) (PSSAgPANI)/graphene composites were prepared through direct exfoliation of graphite using PSSAgPANI as a surfactant. Compared with other fabrication methods of PANI/graphene composites such as in situ polymerization and electrodeposition, the direct exfoliation method provides high quality of graphene because graphite is directly used as a precursor without chemical treatment and minimizes the fabrication step by simply mixing graphite and the polymer. In a three-electrode setup, PSSAgPANI/graphene composite has a specific capacitance of 767 F/g at 0.5 A/ g. This high value of specific capacitance is attributed to its hierarchical structure taking advantage of high specific area of graphene and high pseudo-capacitance of PANI. Furthermore, PSSAgPANI/graphene composite retains 82% of its initial capacitance after 1000 cycles, indicating high electrochemical cyclic stability. |
