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

doi:10.1016/j.electacta.2017.09.086

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 journal › Article

18 Citations (Scopus)

Abstract

We demonstrate the fabrication of flexible electrospun carbon nanofibers (CNFs) containing uniformly distributed carbon nanotubes (CNTs) and iron oxide (FeO_x) nanoparticles (NPs) as a composite material for lithium-ion battery (LIB) anodes. The uniform incorporation of CNTs and FeO_x 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 FeO_x-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 language	English
Pages (from-to)	479-488
Number of pages	10
Journal	Electrochimica Acta
Volume	253
DOIs	https://doi.org/10.1016/j.electacta.2017.09.086
Publication status	Published - 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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Joshi, B., Samuel, E., Jo, H. S., Kim, Y. I., Park, S., Swihart, M. T., Yoon, W., & Yoon, S. G. (2017). Carbon Nanofibers Loaded with Carbon Nanotubes and Iron Oxide as Flexible Freestanding Lithium-Ion Battery Anodes. Electrochimica Acta, 253, 479-488. https://doi.org/10.1016/j.electacta.2017.09.086

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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.",

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