Supercapacitive Properties of 3D-Arrayed Polyaniline Hollow Nanospheres Encaging RuO2 Nanoparticles
| Autor: | Hyemin Kwon, Dajung Hong, Ilhwan Ryu, Sanggyu Yim |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Supercapacitor
Horizontal scan rate Nanostructure Materials science Nanoparticle 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Capacitance 0104 chemical sciences chemistry.chemical_compound chemistry Electrode Polyaniline General Materials Science Polystyrene Composite material 0210 nano-technology |
| Zdroj: | ACS Applied Materials & Interfaces. 9:7412-7423 |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.6b14331 |
| Popis: | A major limitation of polyaniline (PANi) electrodes for supercapacitors is the slow rate of ion transport during redox reactions and the resultant easy saturation of areal capacitance with film thickness. In this study, three-dimensionally (3D)-arrayed PANi nanospheres with highly roughened surface nanomorphology were fabricated to overcome this limitation. A hierarchical nanostructure was obtained by polymerizing aniline monomers on a template of 3D-arrayed polystyrene (PS) nanospheres and appropriate oxidative acid doping. The structure provided dramatically increased surface area and porosity that led to the efficient diffusion of ions. Thus, the specific capacitance (Csp) reached 1570 F g–1, thereby approaching a theoretical capacitance of PANi. In addition, the retention at a high scan rate of 100 mV s–1 was 77.6% of the Csp at a scan rate of 10 mV s–1. Furthermore, 3D-arrayed hollow PANi (H-PANi) nanospheres could be obtained by dissolving the inner PS part of the PS/PANi core/shell nanospheres with... |
| Databáze: | OpenAIRE |
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