Carbon Nanofibers Loaded with Carbon Nanotubes and Iron Oxide as Flexible Freestanding Lithium-Ion Battery Anodes

Bhavana Joshi, Edmund Samuel, Hong Seok Jo, Yong Il Kim, Sera Park, Mark T. Swihart, Wooyoung Yoon, Suk Goo Yoon

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

We demonstrate the fabrication of flexible electrospun carbon nanofibers (CNFs) containing uniformly distributed carbon nanotubes (CNTs) and iron oxide (FeOx) nanoparticles (NPs) as a composite material for lithium-ion battery (LIB) anodes. The uniform incorporation of CNTs and FeOx NPs within the CNFs was confirmed by transmission electron microscopy. Embedding even a small amount of CNTs (0.1 wt%) in the CNFs increased the LIB performance by a factor of two compared with pure CNFs. The specific capacity was also increased, by 25%, when an iron source (iron (III) acetylacetonate) was added at a concentration of 2 wt%. The FeOx-CNT/CNF electrode maintained a capacity of 1008 mAh∙g−1 at a current density of 100 mA∙g−1 after 100 cycles. Further, the high-performance anode material was freestanding, flexible, and lightweight. This makes it suitable for next-generation LIBs, which must deliver high power over long periods while also being light and flexible.

Original languageEnglish
Pages (from-to)479-488
Number of pages10
JournalElectrochimica Acta
Volume253
DOIs
Publication statusPublished - 2017 Nov 1

Keywords

  • Anode
  • Carbon nanotube
  • Electrospinning
  • Iron oxide
  • Lithim ion battery

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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