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Conclusion In summary, a simple and cost-effective approach is developed to fabricate outstanding MnO2/CNT/CP ternary nanocomposite. In such a composite, each component provide much needed critical function for ef?cient use of metal oxide for energy storage; fFWNTs not only provide high surface for the deposition of hierarchical MnO2 porous nanospheres but also improve the electrical conductivity and the mechanical stability of the composite; PEDOT- PSS functions as an effective dispersant for MnO2/fFWNTs structures and as binder material in improving the adhesion to the substrate and the connection among MnO2/fFWNTs particles in the ?lm ;the highly porous MnO2 nanospheres provide high surface area for improved speci?c capacitances. Working together, these components assemble into a mesoporous, interpenetrating network structure, which offers the composite with high speci?c capacitance, excellent rate capability, and long cycling life stability. We believe this design concept can be generalized toward other electrochemical materials containing metal oxides, such as RuO2,Co3O4, and NiO, opening a new avenue for a large spectrum of device applications. * * * Design and synthesis of hierarchical MnO2 nanospheres/carbon nanotubes/conducting polymer ternary composite for high performance electrochemical electrodes By Ye Hou, Yingwen Cheng, Tyler Hobson, and Jie Liu Department of chemistry, Duke University, Durham,North Carolina Redox Exchange Induced MnO2 Nanoparticle Enrichment in Poly(3,4 ethylenedioxythiophene) Nanowires for Electrochemical Energy Storage Some typical work Graphene Oxide MnO2 Nanocomposites for Supercapacitors metal oxides: MnO2 The advantage: high energy density The weakness: poor conductivity , instability on cyclylic charge/discharge process The aim : excellent charge/discharge rate, good stability ,high SC The Solvent : design a ternary nanocomposites film composed of metal oxide, carbon nanotube, and conducting polymer ABSTRACT i