Abstract
We introduce high-performance supercapacitor electrodes with ternary components prepared from consecutive amphiphilic ligand-exchange-based layer-by-layer (LbL) assembly among amine-functionalized multi-walled carbon nanotubes (NH 2 -MWCNTs) in alcohol, oleic acid-stabilized Fe 3 O 4 nanoparticles (OA-Fe 3 O 4 NPs) in toluene, and semiconducting polymers (PEDOT:PSS) in water. The periodic insertion of semiconducting polymers within the (OA-Fe 3 O 4 NP/NH 2 -MWCNT) n multilayer-coated indium tin oxide (ITO) electrode enhanced the volumetric and areal capacitances up to 408 ± 4 F cm −3 and 8.79 ± 0.06 mF cm −2 at 5 mV s −1 , respectively, allowing excellent cycling stability (98.8% of the initial capacitance after 5000 cycles) and good rate capability. These values were higher than those of the OA-Fe 3 O 4 NP/NH 2 -MWCNT multilayered electrode without semiconducting polymer linkers (volumetric capacitance ∼241 ± 4 F cm −3 and areal capacitance ∼1.95 ± 0.03 mF cm −2 ) at the same scan rate. Furthermore, when the asymmetric supercapacitor cells (ASCs) were prepared using OA-Fe 3 O 4 NP- and OA-MnO NP-based ternary component electrodes, they displayed high volumetric energy (0.36 mW h cm −3 ) and power densities (820 mW cm −3 ).
Original language | English |
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Pages (from-to) | 730-740 |
Number of pages | 11 |
Journal | Applied Surface Science |
Volume | 440 |
DOIs | |
Publication status | Published - 2018 May 15 |
Bibliographical note
Publisher Copyright:© 2018 Elsevier B.V.
Keywords
- Amphiphilic ligand exchange
- Multi-walled carbon nanotubes
- Oleic-acid-stabilized iron oxide
- PEDOT:PSS
- Supercapacitor
ASJC Scopus subject areas
- General Chemistry
- Condensed Matter Physics
- General Physics and Astronomy
- Surfaces and Interfaces
- Surfaces, Coatings and Films