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Keywords:

  • electrochemistry;
  • lithium-ion batteries;
  • metal oxides;
  • nanostructures;
  • oxygen reduction reaction
Thumbnail image of graphical abstract

Tube in a tube: A general strategy for the fabrication of novel complex tube-in-tube nanostructures for many metal oxides has been developed. The method involves coating carbon nanofibers with a layer of metal glycolate followed by calcination in air. The unique complex tubular structures of metal oxides are shown to exhibit promising properties for the title applications.