Flexible, Freestanding, and Binder-free SnOx-ZnO/Carbon Nanofiber Composites for Lithium Ion Battery Anodes

Bhavana N. Joshi, Seongpil An, Hong Seok Jo, Kyo Yong Song, Hyun Goo Park, Sunwoo Hwang, Salem S. Al-Deyab, Woo Young Yoon, Sam S. Yoon

Research output: Contribution to journalArticlepeer-review

82 Citations (Scopus)

Abstract

Here, we demonstrate the production of electrospun SnOx-ZnO polyacrylonitrile (PAN) nanofibers (NFs) that are flexible, freestanding, and binder-free. This NF fabric is flexible and thus can be readily tailored into a coin for further cell fabrication. These properties allow volume expansion of the oxide materials and provide shortened diffusion pathways for Li ions than those achieved using the nanoparticle approach. Amorphous SnOx-ZnO particles were uniformly dispersed in the carbon NF (CNF). The SnOx-ZnO CNFs with a Sn:Zn ratio of 3:1 exhibited a superior reversible capacity of 963 mA·h·g-1 after 55 cycles at a current density of 100 mA·g-1, which is three times higher than the capacity of graphite-based anodes. The amorphous NFs facilitated Li2O decomposition, thereby enhancing the reversible capacity. ZnO prevented the aggregation of Sn, which, in turn, conferred stable and high discharge capacity to the cell. Overall, the SnOx-ZnO CNFs were shown to exhibit remarkably high capacity retention and high reversible and rate capacities as Li ion battery anodes.

Original languageEnglish
Pages (from-to)9446-9453
Number of pages8
JournalACS Applied Materials and Interfaces
Volume8
Issue number14
DOIs
Publication statusPublished - 2016 Apr 27

Bibliographical note

Funding Information:
This work was primarily supported by the Industrial Strategic Technology Development Program (Grant 10045221) funded by the Ministry of Knowledge Economy (MKE, Korea). This work was also supported by the Global Frontier Hybrid Interface Materials (GFHIM) of NRF-2013M3A6B1078879 and the Commercializations Promotion Agency for R&D Outcomes (COMPA) funded by the Ministry of Science, ICT and Future Planning (MISP).

Publisher Copyright:
© 2016 American Chemical Society.

Keywords

  • SnO
  • ZnO
  • carbon nanofiber
  • electrospinning
  • freestanding
  • lithium ion battery

ASJC Scopus subject areas

  • General Materials Science

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