title: Graphene-wrapped polyaniline hollow spheres as novel hybrid electrode materials for supercapacitor applications.
abstract: Polyaniline hollow spheres (PANI-HS)@electrochemical reduced graphene oxide (ERGO) hybrids with core-shell structures have been fabricated via a solution-based coassembly process. The hollow nanostructured designing for the PANI-HS greatly enlarges the specific surface area, providing high electroactive regions and short diffusion lengths for both charge and ion transport. The wrapping of ERGO sheets on the PANI-HS can offer highly conductive pathways by bridging individual PANI-HS together, thus facilitating the rate and cycling performance of supercapacitors. The specific capacitance of PANI-HS36@ERGO hybrids can reach 614 F g(-1) at a current density of 1 A g(-1). Furthermore, the capacitance of the PANI-HS36@ERGO hybrids maintains 90% after 500 charging/discharging cycles at a current density of 1 A g(-1), indicating a good cycling stability. The greatly enhanced electrochemical performance can be ascribed to the synergic effects of the two components of PANI-HS and ERGO, suggesting that the PANI-HS@ERGO hybrids as novel electrode materials may have potential applications in high-performance energy storage devices.
authors.affiliation: State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, 220 Handan Road, Shanghai 200433, PR China.
authors.forename: Wei
authors.initials: W
authors.lastname: Fan
authors.forename: Chao
authors.initials: C
authors.lastname: Zhang
authors.forename: Weng Weei
authors.initials: WW
authors.lastname: Tjiu
authors.forename: Kumari Pallathadka
authors.initials: KP
authors.lastname: Pramoda
authors.forename: Chaobin
authors.initials: C
authors.lastname: He
authors.forename: Tianxi
authors.initials: T
authors.lastname: Liu