Amphiphilic ligand exchange reaction-induced supercapacitor electrodes with high volumetric and scalable areal capacitances
- Authors
- Nam, Donghyeon; Heo, Yeongbeom; Cheong, Sanghyuk; Ko, Yongmin; Cho, Jinhan
- Issue Date
- 15-5월-2018
- Publisher
- ELSEVIER
- Keywords
- Supercapacitor; Amphiphilic ligand exchange; Multi-walled carbon nanotubes; Oleic-acid-stabilized iron oxide; PEDOT:PSS
- Citation
- APPLIED SURFACE SCIENCE, v.440, pp.730 - 740
- Indexed
- SCIE
SCOPUS
- Journal Title
- APPLIED SURFACE SCIENCE
- Volume
- 440
- Start Page
- 730
- End Page
- 740
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/75537
- DOI
- 10.1016/j.apsusc.2018.01.153
- ISSN
- 0169-4332
- 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 (NH2-MWCNTs) in alcohol, oleic acid-stabilized Fe3O4 nanoparticles (OA-Fe3O4 NPs) in toluene, and semiconducting polymers (PEDOT: PSS) in water. The periodic insertion of semiconducting polymers within the (OA-Fe3O4 NP/NH2-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-Fe3O4 NP/NH2-MWCNT multilayered electrode without semiconducting polymer linkers (volumetric capacitance similar to 241 +/- 4 F cm(-3) and areal capacitance similar to 1.95 +/- 0.03 mF cm(-2)) at the same scan rate. Furthermore, when the asymmetric supercapacitor cells (ASCs) were prepared using OA-Fe3O4 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)). (C) 2018 Elsevier B. V. All rights reserved.
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