Abstract
Flow-through polypyrrole (PPY) nanoarrays are well tailored into nanopore, nanotube-in-nanopore and nanorod-in-nanopore structures to act as free-standing supercapacitor electrodes through anodization, electro-polymerization deposition and chemical corrosion processes. Independent TiO2 nanotube array is prepared to act as well-aligned and ordered temperate by an anodic oxidation of titanium sheet. Polypyrrole (PPY) was selectively coated on the external surface and/or internal surface of TiO2 nanotubes to form PPY/TiO2 and PPY/TiO2/PPY through a controlled pulse voltammetry electrodeposition process. Polypyrrole (PPY)/ Polypyrrole (PPY) nanotube-in-nanopore and nanorod-in-nanopore arrays can be formed by HF corrosion dissolution of TiO2 template from PPY/TiO2/PPY. Alternatively, PPY nanopore array can be formed by removing TiO2 template from PPY/TiO2. Polypyrrole (PPY) nanopore array has the pore diameter of 130–200 nm and wall thickness of 25–40 nm. Polypyrrole (PPY) Polypyrrole (PPY)/Polypyrrole (PPY) nanotube-in-nanopore array has the pore diameter of 135–225 nm, nanopore wall thickness of 25–45 nm and nanotube diameter of 90–135 nm. Polypyrrole (PPY)/ Polypyrrole (PPY) nanorod-in-nanopore array has the pore diameter of 115–215 nm, nanopore wall thickness of 20–35 nm and nanorod diameter of 85–135 nm. All these PPY and PPY/PPY nanoarrays have the total length of 0.9–1.1 μm and keep flow through and ordered alignment structure contributing to feasible electrolyte ion diffusion. Electroactive PY nanopore, PPY/PPY nanotube-in-nanopore and PPY/PPY nanorod-in-nanopore arrays directly become free-standing electrodes to achieve the specific capacitance of 13.2, 16.7 and 18.3mF cm−2 at 0.25 mA cm−2 in 1.0 M H2SO4 electrolyte and the rate capacity retention of 77.3, 77.2 and 77.0% at 1.5 mA cm−2. Well-tailored and flow-through PPY and PPY/PPY nanoarrays can act as the promising polymer electrode materials for electrochemical energy storage.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
