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      A three dimensional vertically aligned multiwall carbon nanotube/NiCo2O4 core/shell structure for novel high-performance supercapacitors

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      A three dimensional vertically aligned multiwall carbon nanotube.pdf (826.0Kb)
      Author
      Liu, Wen-wen
      Lu, Congxiang
      Liang, Kun
      Tay, Beng Kang
      Date of Issue
      2014
      School
      School of Electrical and Electronic Engineering
      Version
      Published version
      Abstract
      Three dimensional (3D) vertically aligned structures have attracted tremendous attention from scientists in many fields due to their unique properties. In this work, we have built the 3D vertically aligned carbon nanotube (CNT)/NiCo2O4 core/shell nanoarchitecture via a facile electrochemical deposition method followed by subsequent annealing in air. The morphology and structure have been in-depth characterized by SEM, TEM, XRD and Raman spectroscopy. Impressively, when used as the electrode material in a 6 M KOH electrolyte, the vertically aligned CNT/NiCo2O4 core/shell structures exhibit excellent supercapacitive performances, including high specific capacitance, excellent rate capability and good cycle stability. This is due to the unique 3D vertically aligned CNT/NiCo2O4 core/shell structures, which support high electron conductivity, large surface area of NiCo2O4 and fast ion/electron transport in the electrode and at the electrolyte–electrode interface. Furthermore, the synthesis strategy presented here can be easily extended to fabricate other metal oxides with a controlled core/shell structure, which may be a promising facile strategy for high performance supercapacitors, and even advanced Li-ion batteries.
      Subject
      DRNTU::Science::Chemistry::Physical chemistry
      Type
      Journal Article
      Series/Journal Title
      Journal of materials chemistry A
      Rights
      This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.
      Collections
      • EEE Journal Articles
      http://dx.doi.org/10.1039/C4TA00107A
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