Amphiphilic ligand exchange reaction-induced supercapacitor electrodes with high volumetric and scalable areal capacitances

Donghyeon Nam, Yeongbeom Heo, Sanghyuk Cheong, Yongmin Ko, Jinhan Cho

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7 Citations (Scopus)


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 languageEnglish
Pages (from-to)730-740
Number of pages11
JournalApplied Surface Science
Publication statusPublished - 2018 May 15

Bibliographical note

Publisher Copyright:
© 2018 Elsevier B.V.


  • Amphiphilic ligand exchange
  • Multi-walled carbon nanotubes
  • Oleic-acid-stabilized iron oxide
  • Supercapacitor

ASJC Scopus subject areas

  • General Chemistry
  • Condensed Matter Physics
  • General Physics and Astronomy
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films


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