TiO2-C nanowire arrays@polyaniline core-shell nanostructures on carbon cloth for high performance supercapacitors

Abstract TiO 2 -C@polyaniline (PANI) are synthesized on the surface of carbon cloth (CC) as flexible electrode, in which TiO 2 -C nanowire arrays (NWAs) work as supporting frame to enhance the mechanical stability of composites, while PANI is coated on TiO 2 -C NWAs to make a core-shell structure and form a continuous conductive 3D network between isolated TiO 2 -C nanowires. By virtue of such unique structure design, the as-prepared TiO 2 -C@PANI composites achieve desirable cycling performance while possess high specific capacitance. Concretely, this TiO 2 -C@PANI composite shows remarkable specific capacitance of 1818 F g −1 at a current density of 1 A g −1 , good rate capability with 75.5% capacitance retention at 10 A g −1 , and excellent cycling performance with 80% capacity retention over 5000 cycles at a charge-discharge current of 10 A g −1 . Besides, the prefabricated TiO 2 -C@PANI//AC asymmetric hybrid supercapacitor also exhibits a high energy density of 32.4 Wh kg −1 at a power density of 850.0 W kg −1 . In sum, such TiO 2 -C@PANI CC electrode material has a bright future in the application of supercapacitors and provides a new strategy for other conductive polymer-based electrochemical devices.