DC-field-driven combustion waves for one-step fabrication of reduced manganese oxide/multi-walled carbon nanotube hybrid nanostructures as high-performance supercapacitor electrodes

Taehan Yeo, Dongjoon Shin, Jungho Shin, Hayoung Hwang, Byungseok Seo, Jaeho Lee, Wonjoon Choi

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Micro-nanostructured metal oxides can facilitate the development of electrochemical electrodes with enhanced features for supercapacitors and batteries. However, the fabrication of electrodes using precisely controlled metal oxides generally requires high-cost, multi-step procedures, which limits the scalability. Herein, we report that a direct current-field-driven combustion wave (DC-CW) enables the one-step fabrication of high-performance supercapacitor electrodes from hybrid nanostructures comprising reduced manganese oxides and multi-walled carbon nanotubes (MWCNTs). A layered film of MnO2 nanoparticles (NPs) and MWCNTs on a nitrocellulose membrane is prepared and subsequently subjected to a DC-electric field, thereby igniting and propagating CWs throughout the film surface within one second. The underlying mechanism of the DC-CW process is elucidated by comparative analysis of the electrodes generated by the laser irradiation-driven combustion wave process without the DC-field and the as-prepared MnO2/MWCNT film. The MnxOy/MWCNT hybrids via DC-CWs exhibit higher specific capacitance (757 F g-1) and capacitance retention (100%) than the other two systems over 10 000 charge-discharge cycles, due to the improved inter-conductivity and substantial contact interfaces in heterogeneously mixed, less agglomerated nanostructures. The DC-CWs may enable various manipulation methods of micro-nanostructured metal oxides and their hybrid structures via a low-cost, fast, and scalable process for high-performance electrochemical electrodes.

Original languageEnglish
Pages (from-to)24707-24719
Number of pages13
JournalJournal of Materials Chemistry A
Volume5
Issue number47
DOIs
Publication statusPublished - 2017 Jan 1

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Carbon Nanotubes
Manganese oxide
Nanostructures
Carbon nanotubes
Electrochemical electrodes
Oxides
Fabrication
Electrodes
Metals
Capacitance
Nitrocellulose
Collodion
Laser beam effects
Scalability
Costs
Electric fields
Nanoparticles
Membranes
Supercapacitor
manganese oxide

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this

DC-field-driven combustion waves for one-step fabrication of reduced manganese oxide/multi-walled carbon nanotube hybrid nanostructures as high-performance supercapacitor electrodes. / Yeo, Taehan; Shin, Dongjoon; Shin, Jungho; Hwang, Hayoung; Seo, Byungseok; Lee, Jaeho; Choi, Wonjoon.

In: Journal of Materials Chemistry A, Vol. 5, No. 47, 01.01.2017, p. 24707-24719.

Research output: Contribution to journalArticle

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