Rational design of coaxial structured carbon nanotube-manganese oxide (CNT-MnO2) for energy storage application

Rahul R. Salunkhe, Heejoon Ahn, Jung Ho Kim, Yusuke Yamauchi

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

Recently, there has been great research interest in the development of composites (core-shell structures) of carbon nanotubes (CNTs) with metal oxides for improved electrochemical energy storage, photonics, electronics, catalysis, etc. Currently, the synthetic strategies for metal oxides/hydroxides are well established, but the development of core-shell structures by robust, cost-effective chemical methods is still a challenge. The main drawbacks for obtaining such electrodes are the very complex synthesis methods which ultimately result in high production costs. Alternatively, the solution based method offers the advantages of simple and cost effective synthesis, as well as being easy to scale up. Here, we report on the development of multi-walled carbon nanotube-manganese oxide (CNT-MnO2) core-shell structures. These samples were directly utilized for asymmetric supercapacitor (ASC) applications, where the CNT-MnO2 composite was used as the positive electrode and ZIF-8 (zeolitic imidazolate framework, ZIF) derived nanoporous carbon was used as the negative electrode. This unconventional ASC shows a high energy density of 20.44 W h kg-1 and high power density of 16 kW kg-1. The results demonstrate that these are efficient electrodes for supercapacitor application.

Original languageEnglish
Article number204004
JournalNanotechnology
Volume26
Issue number20
DOIs
StatePublished - 2015 May 22

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Carbon Nanotubes
Manganese oxide
Energy storage
Carbon nanotubes
Electrodes
Oxides
Metals
Hydroxides
Costs
Composite materials
Photonics
Catalysis
Electronic equipment
Carbon
manganese oxide
Supercapacitor

Keywords

  • carbon nanotubes
  • metal oxides
  • supercapacitors

Cite this

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Rational design of coaxial structured carbon nanotube-manganese oxide (CNT-MnO2) for energy storage application. / Salunkhe, Rahul R.; Ahn, Heejoon; Kim, Jung Ho; Yamauchi, Yusuke.

In: Nanotechnology, Vol. 26, No. 20, 204004, 22.05.2015.

Research output: Contribution to journalArticle

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