3 D Network-Structured Crumpled Graphene/Carbon Nanotube/Polyaniline Composites for Supercapacitors
| Autor: | Hee D. Jang, Ji Hyuk Choi, Eun Hee Jo, Sun K. Kim, Chong M. Lee, Hankwon Chang |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
General Chemical Engineering 02 engineering and technology Carbon nanotube Spectrum Analysis Raman 010402 general chemistry 01 natural sciences Capacitance Pseudocapacitance law.invention chemistry.chemical_compound Microscopy Electron Transmission X-Ray Diffraction law Polyaniline Environmental Chemistry General Materials Science Graphite Composite material Supercapacitor Aniline Compounds Molecular Structure Nanotubes Carbon Graphene 021001 nanoscience & nanotechnology 0104 chemical sciences General Energy chemistry Electrode Microscopy Electron Scanning 0210 nano-technology |
| Zdroj: | ChemSusChem. 10:2210-2217 |
| ISSN: | 1864-5631 |
| DOI: | 10.1002/cssc.201700212 |
| Popis: | Crumpled graphene (CGR) is considered a promising supercapacitor material to achieve high power and energy density because it could overcome the disadvantages of 2 D GR sheets such as aggregation during the electrode fabrication process, reduction of the available surface area, and limitation of the electron and ion transport. Even though CGR shows good results, carbon materials are limited in terms of their capacitance performance. Here, we report highly enhanced supercapacitor materials by fabricating a 3 D composite containing CGR, carbon nanotubes (CNTs), and polyaniline (PANI). The CNTs increased the basal spacing and bridged the defects for electron transfer between the GR sheets in CGR. PANI can enhance the rate of conduction of electrons and offer high pseudocapacitance originating from its redox reactions. The synergistic effect of the CNTs and PANI may also result in a higher electrochemical capacitance and better stability than each individual component as electrode materials for supercapacitors in a two-electrode system. More importantly, the performance of the supercapacitors can be further enhanced by employing 2 D GR as the binder for the composite electrodes, resulting in specific capacitance of 456 F g-1 , rate capability of 89 %, and cyclic stability of 97 % after 1000 cycles. |
| Databáze: | OpenAIRE |
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