Ultrathin supercapacitor electrodes with high volumetric capacitance and stability using direct covalent-bonding between pseudocapacitive nanoparticles and conducting materials

Yongmin Ko, Dongyeeb Shin, Bonkee Koo, Seung Woo Lee, Won Sub Yoon, Jinhan Cho

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

We introduce high-performance ultrathin supercapacitor electrodes obtained through the direct covalent-bonding layer-by-layer (LbL) assembly (or ligand-exchange LbL assembly) of amine-functionalized multiwalled carbon nanotubes (CNTs) and transition metal oxide nanoparticles (TMO NPs). The main characteristic of our approach is that the internal interfacial resistance of the electrodes can be minimized through the direct covalent-bonding adsorption of densely packed, high-quality TMO NPs onto CNTs without the aid of nonactive binders or insulating NP ligands, and the resulting volumetric capacitance and cycling stability of the electrodes can be significantly enhanced. For this study, well-defined oleic acid-stabilized pseudocapacitive metal oxide nanoparticles (i.e., OA-Fe3O4 and OA-MnO NPs) prepared in toluene were densely adsorbed onto the CNT layer due to the high affinity between the surface of the TMO NPs and the NH2 moieties of the CNTs. The (CNT/OA-Fe3O4 NP)20 multilayer electrode exhibited a high volumetric capacitance of 248±15Fcm-3 (128±7Fg-1) at 5mVs-1 despite the intrinsically low specific capacitance of the Fe3O4 NPs. Additionally, these film electrodes exhibited high performance stability, maintaining 99.2% of their initial capacitance after 1000 cycles. Furthermore, upon the insertion of OA-MnO NPs with high crystallinity and a high theoretical pseudocapacitance value within multilayers instead of OA-Fe3O4 NPs, the formed electrodes (i.e., (CNT/OA-MnO NP)20 multilayers) exhibited a higher volumetric capacitance of 305±10Fcm-3 (183±5Fg-1) (at a scan rate of 5mVs-1) than other conventional ultrathin supercapacitor electrodes, including manganese oxide or iron oxide NPs.

Original languageEnglish
Pages (from-to)612-625
Number of pages14
JournalNano Energy
Volume12
DOIs
Publication statusPublished - 2015 Mar 1

Fingerprint

Carbon Nanotubes
Capacitance
Nanoparticles
Electrodes
Carbon nanotubes
Oxides
Transition metals
Multilayers
Ligands
Manganese oxide
Oleic acid
Multiwalled carbon nanotubes (MWCN)
Toluene
Oleic Acid
Supercapacitor
Iron oxides
Amines
Binders
Metals
Adsorption

Keywords

  • Amine-functionalized multiwall carbon nanotube
  • Direct covalent-bonding
  • Layer-by-layer assembly
  • Multilayers
  • Oleic acid-stabilized transition metal oxide
  • Ultrathin supercapacitor

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Electrical and Electronic Engineering

Cite this

Ultrathin supercapacitor electrodes with high volumetric capacitance and stability using direct covalent-bonding between pseudocapacitive nanoparticles and conducting materials. / Ko, Yongmin; Shin, Dongyeeb; Koo, Bonkee; Woo Lee, Seung; Yoon, Won Sub; Cho, Jinhan.

In: Nano Energy, Vol. 12, 01.03.2015, p. 612-625.

Research output: Contribution to journalArticle

@article{4f8a1a6dfe0242a8a2116458c3fda59c,
title = "Ultrathin supercapacitor electrodes with high volumetric capacitance and stability using direct covalent-bonding between pseudocapacitive nanoparticles and conducting materials",
abstract = "We introduce high-performance ultrathin supercapacitor electrodes obtained through the direct covalent-bonding layer-by-layer (LbL) assembly (or ligand-exchange LbL assembly) of amine-functionalized multiwalled carbon nanotubes (CNTs) and transition metal oxide nanoparticles (TMO NPs). The main characteristic of our approach is that the internal interfacial resistance of the electrodes can be minimized through the direct covalent-bonding adsorption of densely packed, high-quality TMO NPs onto CNTs without the aid of nonactive binders or insulating NP ligands, and the resulting volumetric capacitance and cycling stability of the electrodes can be significantly enhanced. For this study, well-defined oleic acid-stabilized pseudocapacitive metal oxide nanoparticles (i.e., OA-Fe3O4 and OA-MnO NPs) prepared in toluene were densely adsorbed onto the CNT layer due to the high affinity between the surface of the TMO NPs and the NH2 moieties of the CNTs. The (CNT/OA-Fe3O4 NP)20 multilayer electrode exhibited a high volumetric capacitance of 248±15Fcm-3 (128±7Fg-1) at 5mVs-1 despite the intrinsically low specific capacitance of the Fe3O4 NPs. Additionally, these film electrodes exhibited high performance stability, maintaining 99.2{\%} of their initial capacitance after 1000 cycles. Furthermore, upon the insertion of OA-MnO NPs with high crystallinity and a high theoretical pseudocapacitance value within multilayers instead of OA-Fe3O4 NPs, the formed electrodes (i.e., (CNT/OA-MnO NP)20 multilayers) exhibited a higher volumetric capacitance of 305±10Fcm-3 (183±5Fg-1) (at a scan rate of 5mVs-1) than other conventional ultrathin supercapacitor electrodes, including manganese oxide or iron oxide NPs.",
keywords = "Amine-functionalized multiwall carbon nanotube, Direct covalent-bonding, Layer-by-layer assembly, Multilayers, Oleic acid-stabilized transition metal oxide, Ultrathin supercapacitor",
author = "Yongmin Ko and Dongyeeb Shin and Bonkee Koo and {Woo Lee}, Seung and Yoon, {Won Sub} and Jinhan Cho",
year = "2015",
month = "3",
day = "1",
doi = "10.1016/j.nanoen.2015.01.002",
language = "English",
volume = "12",
pages = "612--625",
journal = "Nano Energy",
issn = "2211-2855",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - Ultrathin supercapacitor electrodes with high volumetric capacitance and stability using direct covalent-bonding between pseudocapacitive nanoparticles and conducting materials

AU - Ko, Yongmin

AU - Shin, Dongyeeb

AU - Koo, Bonkee

AU - Woo Lee, Seung

AU - Yoon, Won Sub

AU - Cho, Jinhan

PY - 2015/3/1

Y1 - 2015/3/1

N2 - We introduce high-performance ultrathin supercapacitor electrodes obtained through the direct covalent-bonding layer-by-layer (LbL) assembly (or ligand-exchange LbL assembly) of amine-functionalized multiwalled carbon nanotubes (CNTs) and transition metal oxide nanoparticles (TMO NPs). The main characteristic of our approach is that the internal interfacial resistance of the electrodes can be minimized through the direct covalent-bonding adsorption of densely packed, high-quality TMO NPs onto CNTs without the aid of nonactive binders or insulating NP ligands, and the resulting volumetric capacitance and cycling stability of the electrodes can be significantly enhanced. For this study, well-defined oleic acid-stabilized pseudocapacitive metal oxide nanoparticles (i.e., OA-Fe3O4 and OA-MnO NPs) prepared in toluene were densely adsorbed onto the CNT layer due to the high affinity between the surface of the TMO NPs and the NH2 moieties of the CNTs. The (CNT/OA-Fe3O4 NP)20 multilayer electrode exhibited a high volumetric capacitance of 248±15Fcm-3 (128±7Fg-1) at 5mVs-1 despite the intrinsically low specific capacitance of the Fe3O4 NPs. Additionally, these film electrodes exhibited high performance stability, maintaining 99.2% of their initial capacitance after 1000 cycles. Furthermore, upon the insertion of OA-MnO NPs with high crystallinity and a high theoretical pseudocapacitance value within multilayers instead of OA-Fe3O4 NPs, the formed electrodes (i.e., (CNT/OA-MnO NP)20 multilayers) exhibited a higher volumetric capacitance of 305±10Fcm-3 (183±5Fg-1) (at a scan rate of 5mVs-1) than other conventional ultrathin supercapacitor electrodes, including manganese oxide or iron oxide NPs.

AB - We introduce high-performance ultrathin supercapacitor electrodes obtained through the direct covalent-bonding layer-by-layer (LbL) assembly (or ligand-exchange LbL assembly) of amine-functionalized multiwalled carbon nanotubes (CNTs) and transition metal oxide nanoparticles (TMO NPs). The main characteristic of our approach is that the internal interfacial resistance of the electrodes can be minimized through the direct covalent-bonding adsorption of densely packed, high-quality TMO NPs onto CNTs without the aid of nonactive binders or insulating NP ligands, and the resulting volumetric capacitance and cycling stability of the electrodes can be significantly enhanced. For this study, well-defined oleic acid-stabilized pseudocapacitive metal oxide nanoparticles (i.e., OA-Fe3O4 and OA-MnO NPs) prepared in toluene were densely adsorbed onto the CNT layer due to the high affinity between the surface of the TMO NPs and the NH2 moieties of the CNTs. The (CNT/OA-Fe3O4 NP)20 multilayer electrode exhibited a high volumetric capacitance of 248±15Fcm-3 (128±7Fg-1) at 5mVs-1 despite the intrinsically low specific capacitance of the Fe3O4 NPs. Additionally, these film electrodes exhibited high performance stability, maintaining 99.2% of their initial capacitance after 1000 cycles. Furthermore, upon the insertion of OA-MnO NPs with high crystallinity and a high theoretical pseudocapacitance value within multilayers instead of OA-Fe3O4 NPs, the formed electrodes (i.e., (CNT/OA-MnO NP)20 multilayers) exhibited a higher volumetric capacitance of 305±10Fcm-3 (183±5Fg-1) (at a scan rate of 5mVs-1) than other conventional ultrathin supercapacitor electrodes, including manganese oxide or iron oxide NPs.

KW - Amine-functionalized multiwall carbon nanotube

KW - Direct covalent-bonding

KW - Layer-by-layer assembly

KW - Multilayers

KW - Oleic acid-stabilized transition metal oxide

KW - Ultrathin supercapacitor

UR - http://www.scopus.com/inward/record.url?scp=84922708074&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84922708074&partnerID=8YFLogxK

U2 - 10.1016/j.nanoen.2015.01.002

DO - 10.1016/j.nanoen.2015.01.002

M3 - Article

VL - 12

SP - 612

EP - 625

JO - Nano Energy

JF - Nano Energy

SN - 2211-2855

ER -